PCA9552BS,118_技术文档

PCA9552

16-bit I²C-bus LED driver with programmable blink rates

Rev. 05 — 9 March 2006

Product data sheet

1. General description

The PCA9552 LED blinker blinks LEDs in I²C-bus and SMBus applications where it is

necessary to limit bus trafﬁc or free up the I²C-bus master's (MCU, MPU, DSP, chip set,

etc.) timer. The uniqueness of this device is the internal oscillator with two programmable

blink rates. To blink LEDs using normal I/O expanders like the PCF8574 or PCA9554, the

bus master must send repeated commands to turn the LED on and off. This greatly

increases the amount of trafﬁc on the I²C-bus and uses up one of the master's timers. The

PCA9552 LED blinker instead requires only the initial setup command to program

BLINK RATE 1 and BLINK RATE 2 (that is, the frequency and duty cycle) for each

individual output. From then on, only one command from the bus master is required to

turn each individual open-drain output on, off, or to cycle at BLINK RATE 1 or

BLINK RATE 2. Maximum output sink current is 25 mA per bit and 200 mA per package.

Any bits not used for controlling the LEDs can be used for General Purpose Parallel

Input/Output (GPIO) expansion.

The active LOW hardware reset pin (RESET) and Power-On Reset (POR) initializes the

registers to their default state, all zeroes, causing the bits to be set HIGH (LED off).

Three hardware address pins on the PCA9552 allow eight devices to operate on the same

bus.

2. Features

■ 16 LED drivers (on, off, ﬂashing at a programmable rate)

■ 2 selectable, fully programmable blink rates (frequency and duty cycle) between

0.172 Hz and 44 Hz (5.82 seconds and 0.023 seconds)

■ Input/outputs not used as LED drivers can be used as regular GPIOs

■ Internal oscillator requires no external components

■ I²C-bus interface logic compatible with SMBus

■ Internal power-on reset

■ Noise ﬁlter on SCL/SDA inputs

■ Active LOW reset input

■ 16 open-drain outputs directly drive LEDs to 25 mA

■ Edge rate control on outputs

■ No glitch on power-up

■ Supports hot insertion

■ Low standby current

■ Operating power supply voltage range of 2.3 V to 5.5 V

■ 0 Hz to 400 kHz clock frequency

PCA9552

Philips Semiconductors

16-bit I²C-bus LED driver with programmable blink rates

■ ESD protection exceeds 2000 V HBM per JESD22-A114, 150 V MM per

JESD22-A115 and 1000 V CDM per JESD22-C101

■ Latch-up testing is done to JEDEC Standard JESD78 which exceeds 100 mA

■ Packages offered: SO24, TSSOP24, HVQFN24

3. Ordering information

Table 1:

Ordering information

T_amb= −40 °C to +85 °C

Type number

Topside mark Package

Name

Description

Version

PCA9552D

PCA9552

SO24

plastic small outline package; 24 leads; body width 7.5 mm SOT137-1

PCA9552PW

TSSOP24

plastic thin shrink small outline package; 24 leads;

body width 4.4 mm

SOT355-1

SOT616-1

PCA9552BS

9552

HVQFN24

plastic thermal enhanced very thin quad ﬂat package;

no leads; 24 terminals; body 4 × 4 × 0.85 mm

4. Block diagram

A0 A1 A2

PCA9552

INPUT

REGISTER

2

SCL

SDA

INPUT

FILTERS

I C-BUS

LED SELECT (LSn)

REGISTER

CONTROL

1

0

V

DD

POWER-ON

RESET

LEDn

RESET

BLINK0

BLINK1

PRESCALER 0

REGISTER

PWM0

REGISTER

PRESCALER 1

REGISTER

PWM1

REGISTER

OSCILLATOR

V

SS

002aac168

Remark: Only one I/O shown for clarity.

Fig 1. Block diagram of PCA9552

PCA9552_5

Product data sheet

Rev. 05 — 9 March 2006

2 of 28

PCA9552

Philips Semiconductors

16-bit I²C-bus LED driver with programmable blink rates

5. Pinning information

5.1 Pinning

1

2

24

23

22

21

20

19

18

17

16

15

14

13

1

2

24

23

22

21

20

19

18

17

16

15

14

13

A0

A1

V

A0

A1

V

DD

SDA

3

A2

SCL

A2

SCL

4

LED0

LED1

LED2

LED3

LED4

LED5

LED6

LED7

RESET

LED15

LED14

LED13

LED12

LED11

LED10

LED9

LED0

LED1

LED2

LED3

LED4

LED5

LED6

LED7

RESET

LED15

LED14

LED13

LED12

LED11

LED10

LED9

5

6

PCA9552D

PCA9552PW

7

8

9

10

11

12

10

11

12

V

SS

LED8

V

SS

LED8

002aac165

002aac166

Fig 2. Pin conﬁguration for SO24

Fig 3. Pin conﬁguration for TSSOP24

terminal 1

index area

1

2

3

4

5

6

18

17

16

15

14

13

LED0

LED1

LED2

LED3

LED4

LED5

RESET

LED15

LED14

LED13

LED12

LED11

PCA9552BS

002aac167

Transparent top view

Fig 4. Pin conﬁguration for HVQFN24

PCA9552_5

Product data sheet

Rev. 05 — 9 March 2006

3 of 28

PCA9552

Philips Semiconductors

16-bit I²C-bus LED driver with programmable blink rates

5.2 Pin description

Table 2:

Symbol

Pin description

Description

HVQFN24

SO24, TSSOP24

A0

1

22

23

24

1

address input 0

address input 1

address input 2

LED driver 0

A1

2

A2

3

LED0

LED1

LED2

LED3

LED4

LED5

LED6

LED7

V_SS

4

5

2

LED driver 1

6

3

LED driver 2

7

4

LED driver 3

8

5

LED driver 4

9

6

LED driver 5

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

7

LED driver 6

8

LED driver 7

9^[1]

10

11

12

13

14

15

16

17

18

19

20

21

ground supply

LED driver 8

LED8

LED9

LED10

LED11

LED12

LED13

LED14

LED15

RESET

SCL

LED driver 9

LED driver 10

LED driver 11

LED driver 12

LED driver 13

LED driver 14

LED driver 15

active LOW reset input

serial clock line

serial data line

supply voltage

SDA

V_DD

[1] HVQFN package die supply ground is connected to both V_SSpin and exposed center pad. V_SSpin must be

connected to supply ground for proper device operation. For enhanced thermal, electrical, and board level

performance, the exposed pad needs to be soldered to the board using a corresponding thermal pad on the

board and for proper heat conduction through the board, thermal vias need to be incorporated in the

printed-circuit board in the thermal pad region.

PCA9552_5

Product data sheet

Rev. 05 — 9 March 2006

4 of 28

PCA9552

Philips Semiconductors

16-bit I²C-bus LED driver with programmable blink rates

6. Functional description

Refer to Figure 1 “Block diagram of PCA9552”.

6.1 Device address

Following a START condition, the bus master must output the address of the slave it is

accessing. The address of the PCA9552 is shown in Figure 5. To conserve power, no

internal pull-up resistors are incorporated on the hardware selectable address pins and

they must be pulled HIGH or LOW.

slave address

1

0

A2 A1 A0 R/W

fixed

programmable

002aac169

Fig 5. PCA9552 address

The last bit of the address byte deﬁnes the operation to be performed. When set to logic 1

a read is selected, while a logic 0 selects a write operation.

6.2 Control Register

Following the successful acknowledgement of the slave address, the bus master will send

a byte to the PCA9552, which will be stored in the Control Register. This register can be

read and written via the I²C-bus.

0

AI B3 B2 B1 B0

register address

Auto-Increment flag

002aac170

Reset state: 00h

Fig 6. Control Register

The lowest 3 bits are used as a pointer to determine which register will be accessed.

If the Auto-Increment ﬂag (AI) is set, the four low order bits of the Control Register are

automatically incremented after a read or write. This allows the user to program the

registers sequentially. The contents of these bits will rollover to ‘0000’ after the last

register is accessed.

When the Auto-Increment ﬂag is set (AI = 1) and a read sequence is initiated, the

sequence must start by reading a register different from ‘0' (B3 B2 B1 B0 ≠ 0000).

Only the 4 least signiﬁcant bits are affected by the AI ﬂag. Unused bits must be

programmed with zeroes.

PCA9552_5

Product data sheet

Rev. 05 — 9 March 2006

5 of 28

PCA9552

Philips Semiconductors

16-bit I²C-bus LED driver with programmable blink rates

6.2.1 Control Register deﬁnition

Table 3:

Register summary

B3

0

B2

B1

0

B0

0

Symbol

INPUT0

INPUT1

PSC0

PWM0

PSC1

PWM1

LS0

Access

Description

0

1

0

read only

read/write

input register 0

0

1

input register 1

0

1

0

frequency prescaler 0

PWM register 0

0

1

0

frequency prescaler 1

PWM register 1

0

1

0

1

0

LED0 to LED3 selector

LED4 to LED7 selector

LED8 to LED11 selector

LED12 to LED15 selector

0

1

LS1

1

0

LS2

1

0

1

LS3

6.3 Register descriptions

6.3.1 INPUT0 - Input register 0

The Input register 0 reﬂects the state of the device pins (inputs LED0 to LED7). Writes to

this register will be acknowledged but will have no effect.

Table 4:

Bit

INPUT0 - input register 0 description

7

LED7

X

6

LED6

X

5

LED5

X

4

LED4

X

3

LED3

X

2

LED2

X

1

LED1

X

0

LED0

X

Symbol

Default

Remark: The default value ‘X’ is determined by the externally applied logic level (normally

logic 1) when used for directly driving LED with pull-up to V_DD

.

6.3.2 INPUT1 - Input register 1

The Input register 1 reﬂects the state of the device pins (inputs LED8 to LED15). Writes to

this register will be acknowledged but will have no effect.

Table 5:

Bit

INPUT1 - input register 1 description

7

LED15

X

6

LED14

X

5

LED13

X

4

LED12

X

3

LED11

X

2

LED10

X

1

LED9

X

0

LED8

X

Symbol

Default

Remark: The default value ‘X’ is determined by the externally applied logic level (normally

logic 1) when used for directly driving LED with pull-up to V_DD

.

PCA9552_5

Product data sheet

Rev. 05 — 9 March 2006

6 of 28

PCA9552

Philips Semiconductors

16-bit I²C-bus LED driver with programmable blink rates

6.3.3 PCS0 - Frequency Prescaler 0

PSC0 is used to program the period of the PWM output.

The period of BLINK0 = (PSC0 + 1) / 44.

Table 6:

Bit

PSC0 - Frequency Prescaler 0 register description

7

6

5

4

3

2

1

0

Symbol PSC0[7] PSC0[6] PSC0[5] PSC0[4] PSC0[3] PSC0[2] PSC0[1] PSC0[0]

Default

1

6.3.4 PWM0 - Pulse Width Modulation 0

The PWM0 register determines the duty cycle of BLINK0. The outputs are LOW (LED off)

when the count is less than the value in PWM0 and HIGH when it is greater. If PWM0 is

programmed with 00h, then the PWM0 output is always LOW.

The duty cycle of BLINK0 = (256 − PWM0) / 256.

Table 7:

Bit

PWM0 - Pulse Width Modulation 0 register description

7

6

5

4

3

2

1

0

Symbol

PWM0

[7]

PWM0

[6]

PWM0

[5]

PWM0

[4]

PWM0

[3]

PWM0

[2]

PWM0

[1]

PWM0

[0]

Default

1

0

6.3.5 PCS1 - Frequency Prescaler 1

PSC1 is used to program the period of the PWM output.

The period of BLINK1 = (PSC1 + 1) / 44.

Table 8:

Bit

PSC1 - Frequency Prescaler 1 register description

7

6

5

4

3

2

1

0

Symbol PSC1[7] PSC1[6] PSC1[5] PSC1[4] PSC1[3] PSC1[2] PSC1[1] PSC1[0]

Default

1

6.3.6 PWM1 - Pulse Width Modulation 1

The PWM1 register determines the duty cycle of BLINK1. The outputs are LOW (LED off)

when the count is less than the value in PWM1 and HIGH when it is greater. If PWM1 is

programmed with 00h, then the PWM1 output is always LOW.

The duty cycle of BLINK1 = (256 − PWM1) / 256.

Table 9:

Bit

PWM1 - Pulse Width Modulation 1 register description

7

6

5

4

3

2

1

0

Symbol

PWM1

[7]

PWM1

[6]

PWM1

[5]

PWM1

[4]

PWM1

[3]

PWM1

[2]

PWM1

[1]

PWM1

[0]

Default

1

0

PCA9552_5

Product data sheet

Rev. 05 — 9 March 2006

7 of 28

PCA9552

Philips Semiconductors

16-bit I²C-bus LED driver with programmable blink rates

6.3.7 LS0 to LS3 - LED selector registers

The LSn LED select registers determine the source of the LED data.

00 = output is set LOW (LED on)

01 = output is set high-impedance (LED off; default)

10 = output blinks at PWM0 rate

11 = output blinks at PWM1 rate

Table 10: LS0 to LS3 - LED selector registers bit description

Legend: * default value

Register

Bit

Value

Description

LS0 - LED0 to LED3 selector

LS0

7:6

5:4

3:2

1:0

01*

LED3 selected

LED2 selected

LED1 selected

LED0 selected

LS1 - LED4 to LED7 selector

LS1

7:6

5:4

3:2

1:0

01*

LED7 selected

LED6 selected

LED5 selected

LED4 selected

LS2 - LED8 to LED11 selector

LS2

7:6

5:4

3:2

1:0

01*

LED11 selected

LED10 selected

LED9 selected

LED8 selected

LS3 - LED12 to LED15 selector

LS3

7:6

5:4

3:2

1:0

01*

LED15 selected

LED14 selected

LED13 selected

LED12 selected

PCA9552_5

Product data sheet

Rev. 05 — 9 March 2006

8 of 28

PCA9552

Philips Semiconductors

16-bit I²C-bus LED driver with programmable blink rates

6.4 Pins used as GPIOs

LED pins not used to control LEDs can be used as general purpose I/Os (GPIOs).

For use as input, set LEDn to high-impedance (01) and then read the pin state via the

input register.

For use as output, connect external pull-up resistor to the pin and size it according to the

DC recommended operating characteristics. LED output pin is HIGH when the output is

programmed as high-impedance, and LOW when the output is programmed LOW through

the ‘LED selector’ register. The output can be pulse-width controlled when PWM0 or

PWM1 are used.

6.5 Power-on reset

When power is applied to V_DD, an internal Power-On Reset (POR) holds the PCA9552 in

a reset condition until V_DDhas reached V_POR. At that point, the reset condition is released

and the PCA9552 registers are initialized to their default states. Thereafter, V_DDmust be

lowered below 0.2 V to reset the device.

6.6 External RESET

A reset can be accomplished by holding the RESET pin LOW for a minimum of t_w(rst). The

PCA9552 registers and I²C-bus state machine will be held in their default states until the

RESET input is once again HIGH.

This input requires a pull-up resistor to V_DDif no active connection is used.

PCA9552_5

Product data sheet

Rev. 05 — 9 March 2006

9 of 28

PCA9552

Philips Semiconductors

16-bit I²C-bus LED driver with programmable blink rates

7. Characteristics of the I²C-bus

The I²C-bus is for 2-way, 2-line communication between different ICs or modules. The two

lines are a serial data line (SDA) and a serial clock line (SCL). Both lines must be

connected to a positive supply via a pull-up resistor when connected to the output stages

of a device. Data transfer may be initiated only when the bus is not busy.

7.1 Bit transfer

One data bit is transferred during each clock pulse. The data on the SDA line must remain

stable during the HIGH period of the clock pulse as changes in the data line at this time

will be interpreted as control signals (see Figure 7).

SDA

SCL

data line

stable;

data valid

change

of data

allowed

mba607

Fig 7. Bit transfer

7.1.1 START and STOP conditions

Both data and clock lines remain HIGH when the bus is not busy. A HIGH-to-LOW

transition of the data line while the clock is HIGH is deﬁned as the START condition (S). A

LOW-to-HIGH transition of the data line while the clock is HIGH is deﬁned as the STOP

condition (P) (see Figure 8.)

SDA

SCL

SDA

SCL

S

P

STOP condition

START condition

mba608

Fig 8. Deﬁnition of START and STOP conditions

7.2 System conﬁguration

A device generating a message is a ‘transmitter'; a device receiving is the ‘receiver'. The

device that controls the message is the ‘master' and the devices which are controlled by

the master are the ‘slaves' (see Figure 9).

PCA9552_5

Product data sheet

Rev. 05 — 9 March 2006

10 of 28

PCA9552

Philips Semiconductors

16-bit I²C-bus LED driver with programmable blink rates

SDA

SCL

SLAVE

TRANSMITTER/

RECEIVER

MASTER

TRANSMITTER/

RECEIVER

MASTER

TRANSMITTER/

RECEIVER

2

SLAVE

RECEIVER

MASTER

TRANSMITTER

I C-BUS

MULTIPLEXER

SLAVE

002aaa966

Fig 9. System conﬁguration

7.3 Acknowledge

The number of data bytes transferred between the START and the STOP conditions from

transmitter to receiver is not limited. Each byte of eight bits is followed by one

acknowledge bit. The acknowledge bit is a HIGH level put on the bus by the transmitter,

whereas the master generates an extra acknowledge related clock pulse.

A slave receiver which is addressed must generate an acknowledge after the reception of

each byte. Also a master must generate an acknowledge after the reception of each byte

that has been clocked out of the slave transmitter. The device that acknowledges has to

pull down the SDA line during the acknowledge clock pulse, so that the SDA line is stable

LOW during the HIGH period of the acknowledge related clock pulse; set-up and hold

times must be taken into account.

A master receiver must signal an end of data to the transmitter by not generating an

acknowledge on the last byte that has been clocked out of the slave. In this event, the

transmitter must leave the data line HIGH to enable the master to generate a STOP

condition.

data output

by transmitter

not acknowledge

data output

by receiver

acknowledge

SCL from master

1

2

8

9

S

clock pulse for

START

condition

acknowledgement

002aaa987

Fig 10. Acknowledgement on the I²C-bus

PCA9552_5

Product data sheet

Rev. 05 — 9 March 2006

11 of 28

PCA9552

Philips Semiconductors

16-bit I²C-bus LED driver with programmable blink rates

7.4 Bus transactions

SCL

1

2

3

4

5

6

7

8

9

slave address

A2 A1 A0

command byte

AI B3 B2 B1 B0

data to register

DATA 1

SDA

S

1

0

A

0

A

START condition

R/W acknowledge

from slave

acknowledge

from slave

acknowledge

from slave

write to register

t

v(Q)

data out from port

DATA 1 VALID

002aac185

Fig 11. Write to register

slave address

A2 A1 A0

command byte

AI B3 B2 B1 B0 A

(cont.)

SDA

S

1

0

A

0

START condition

R/W

acknowledge

from slave

acknowledge

from slave

slave address

data from register

DATA (last byte)

(cont.)

S

1

0

A2 A1 A0

1

A

DATA (first byte)

A

NA P

Auto-Increment

register address

if AI = 1

(repeated)

START condition

R/W

acknowledge

from master

no acknowledge STOP

from master condition

acknowledge

from slave

at this moment master-transmitter becomes master-receiver

and slave-receiver becomes slave-transmitter

002aac186

Fig 12. Read from register

no acknowledge

from master

slave address

A2 A1 A0

data from port

DATA 1

data from port

DATA 4

SDA

S

1

0

1

A

NA

P

START condition

R/W acknowledge

from slave

acknowledge

from master

STOP

condition

read from

port

t

su(D)

h(D)

data into

port

DATA 2

DATA 3

DATA 4

002aac187

Remark: This ﬁgure assumes the command byte has previously been programmed with 00h.

Fig 13. Read Input Port register

PCA9552_5

Product data sheet

Rev. 05 — 9 March 2006

12 of 28

PCA9552

Philips Semiconductors

16-bit I²C-bus LED driver with programmable blink rates

8. Application design-in information

5 V

10 kΩ

(3×)

2

I C-BUS/SMBus

MASTER

SDA

V

DD

SDA

SCL

LED0

LED1

LED2

LED3

LED4

LED5

LED6

LED7

LED8

LED9

LED10

LED11

LED12

LED13

LED14

LED15

SCL

RESET

PCA9552

A2

A1

A0

V

GPIOs

SS

002aac188

LED0 to LED12 are used as LED drivers.

LED13 to LED15 are used as regular GPIOs.

Fig 14. Typical application

8.1 Minimizing I_DDwhen the I/O is used to control LEDs

When the I/Os are used to control LEDs, they are normally connected to V_DDthrough a

resistor as shown in Figure 15. Since the LED acts as a diode, when the LED is off the I/O

V_Iis about 1.2 V less than V_DD. The supply current, I_DD, increases as V_Ibecomes lower

than V_DDand is speciﬁed as ∆I_stbin Table 13 “Static characteristics”.

Designs needing to minimize current consumption, such as battery power applications,

should consider maintaining the I/O pins greater than or equal to V_DDwhen the LED is off.

Figure 15 shows a high value resistor in parallel with the LED. Figure 16 shows V_DDless

than the LED supply voltage by at least 1.2 V. Both of these methods maintain the

input/output V_Iat or above V_DDand prevents additional supply current consumption when

the LED is off.

PCA9552_5

Product data sheet

Rev. 05 — 9 March 2006

13 of 28

PCA9552

Philips Semiconductors

16-bit I²C-bus LED driver with programmable blink rates

3.3 V

5 V

V

DD

V

100 kΩ

V

DD

LED

LEDn

002aac189

002aac190

Fig 15. High value resistor in parallel with

the LED

Fig 16. Device supplied by a lower voltage

8.2 Programming example

The following example will show how to set LED0 to LED3 on. It will then set LED4 and

LED5 to blink at 1 Hz at a 50 % duty cycle. LED6 and LED7 will be set to blink at 4 Hz and

at a 25 % duty cycle. LED8 to LED15 will be set to off.

Table 11: Programming PCA9552

Program sequence

I²C-bus

S

START

PCA9552 address with A0 to A2 = LOW

PSC0 subaddress + Auto-Increment

Set prescaler PSC0 to achieve a period of 1 second:

PSC0 + 1

C0h

12h

2Bh

Blink period = 1 =

----------------------

44

PSC0 = 43

Set PWM0 duty cycle to 50 %:

80h

0Ah

C0h

256 – PWM0

= 0.5

-------------------------------

256

PWM0 = 128

Set prescaler PCS1 to achieve a period of 0.25 seconds:

PSC1 + 1

Blink period = 0.25 =

----------------------

44

PSC1 = 10

Set PWM1 output duty cycle to 25 %:

256 – PWM1

= 0.25

-------------------------------

256

PWM1 = 192

Set LED0 to LED3 on

00h

FAh

55h

P

Set LED4 and LED5 to PWM0, and LED6 or LED7 to PWM1

Set LED8 to LED11 off

Set LED12 to LED15 off

STOP

PCA9552_5

Product data sheet

Rev. 05 — 9 March 2006

14 of 28

PCA9552

Philips Semiconductors

16-bit I²C-bus LED driver with programmable blink rates

9. Limiting values

Table 12: Limiting values

In accordance with the Absolute Maximum Rating System (IEC 60134).

Symbol

V_DD

Parameter

Conditions

Min

Max

+6.0

5.5

Unit

V

supply voltage

−0.5

V_I/O

voltage on an input/output pin

output current on pin LEDn

ground supply current

total power dissipation

storage temperature

ambient temperature

LEDn used as an I/O

V_SS− 0.5

V

I_O(LEDn)

I_SS

-

±25

200

400

+150

+85

mA

mW

°C

-

P_tot

-

T_stg

−65

−40

T_amb

operating

°C

10. Static characteristics

Table 13: Static characteristics

V_DD= 2.3 V to 5.5 V; V_SS= 0 V; T_amb= −40 °C to +85 °C; unless otherwise speciﬁed.

Symbol Parameter

Supply

Conditions

Min

Typ ^[1]

Max

Unit

V_DD

I_DD

supply voltage

supply current

2.3

-

5.5

V

Operating mode; V_DD= 5.5 V; no load;

V_I= V_DDor V_SS; f_SCL= 100 kHz

350

550

µA

I_stb

standby current

Standby mode; V_DD= 5.5 V; no load;

V_I= V_DDor V_SS; f_SCL= 0 kHz

-

2.1

-

5.0

2

µA

∆I_stb

additional standby current Standby mode; V_DD= 5.5 V;

every LED I/O at V_I= 4.3 V;

mA

f_SCL= 0 kHz

V_POR

power-on reset voltage^[2]

V_DD= 3.3 V; no load; V_I= V_DDor V_SS

-

1.7

2.2

V

Input SCL; input/output SDA

V_IL

V_IH

I_OL

I_L

LOW-level input voltage

HIGH-level input voltage

LOW-level output current

leakage current

−0.5

-

0.3V_DD

V

0.7V_DD

-

5.5

-

V

V_OL= 0.4 V

V_I= V_DD= V_SS

V_I= V_SS

3

6.5

-

mA

µA

pF

−1

-

+1

5

C_i

input capacitance

4.4

I/Os

V_IL

V_IH

I_OL

LOW-level input voltage

HIGH-level input voltage

LOW-level output current

−0.5

2.0

9

-

0.8

V

-

5.5

V

[3]

V_OL= 0.4 V; V_DD= 2.3 V

V_OL= 0.4 V; V_DD= 3.0 V

V_OL= 0.4 V; V_DD= 5.0 V

V_OL= 0.7 V; V_DD= 2.3 V

V_OL= 0.7 V; V_DD= 3.0 V

V_OL= 0.7 V; V_DD= 5.0 V

V_DD= 3.6 V; V_I= 0 V or V_DD

-

mA

µA

pF

12

15

20

25

−1

-

I_LI

input leakage current

-

+1

5

C_io

input/output capacitance

2.6

PCA9552_5

Product data sheet

Rev. 05 — 9 March 2006

15 of 28

PCA9552

Philips Semiconductors

16-bit I²C-bus LED driver with programmable blink rates

Table 13: Static characteristics …continued

V_DD= 2.3 V to 5.5 V; V_SS= 0 V; T_amb= −40 °C to +85 °C; unless otherwise speciﬁed.

Symbol Parameter

Conditions

Min

Typ ^[1]

Max

Unit

Select inputs A0, A1, A2; RESET

V_IL

V_IH

I_LI

LOW-level input voltage

HIGH-level input voltage

input leakage current

input capacitance

−0.5

2.0

−1

-

0.8

5.5

+1

5

V

-

V

-

µA

pF

C_i

V_I= V_SS

2.3

[1] All typical values at 3.3 V and 25 °C.

[2] V_DDmust be lowered to 0.2 V in order to reset part.

[3] Each I/O must be externally limited to a maximum of 25 mA and each octal ([LED0 to LED7] and [LED8 to LED15]) must be limited to a

maximum current of 100 mA for a device total of 200 mA.

002aac191

002aac192

20 %

(1)

(2)

(1)

(2)

(3)

percent

variation

percent

variation

0 %

−20 %

−40 %

0 %

−20 %

−40 %

(3)

−40

−20

0

20

40

60

80

100

(°C)

−40

−20

0

20

40

60

80

100

(°C)

T

amb

(1) maximum

(2) average

(3) minimum

(1) maximum

(2) average

(3) minimum

Fig 17. Typical frequency variation over process at

_DD= 2.3 V to 3.0 V

Fig 18. Typical frequency variation over process at

V_DD= 3.0 V to 5.5 V

V

PCA9552_5

Product data sheet

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PCA9552

Philips Semiconductors

16-bit I²C-bus LED driver with programmable blink rates

11. Dynamic characteristics

Table 14: Dynamic characteristics

Symbol Parameter

Conditions

Standard mode

I²C-bus

Fast mode I²C-bus

Unit

Min

0

Max

100

-

Min

0

Max

400

-

f_SCL

t_BUF

SCL clock frequency

kHz

bus free time between a STOP and

START condition

4.7

1.3

µs

t_HD;STA

t_SU;STA

hold time (repeated) START condition

4.0

4.7

-

0.6

-

µs

set-up time for a repeated START

condition

t_SU;STO

t_HD;DAT

t_VD;ACK

t_VD;DAT

set-up time for STOP condition

data hold time

4.0

-

0.6

-

µs

ns

µs

ns

0

[1]

[2]

data valid acknowledge time

data valid time

-

600

1500

-

600

-

LOW-level

HIGH-level

-

t_SU;DAT

t_LOW

t_HIGH

t_f

data set-up time

250

4.7

4.0

-

100

1.3

LOW period of the SCL clock

HIGH period of the SCL clock

fall time of both SDA and SCL signals

rise time of both SDA and SCL signals

-

0.6

-

[3]

300

1000

50

20 + 0.1C_b

-

300

50

t_r

-

t_SP

pulse width of spikes that must be

suppressed by the input ﬁlter

-

Port timing

t_v(Q)

data output valid time

data input setup time

data input hold time

-

100

1

250

-

100

1

250

ns

µs

t_su(D)

-

t_h(D)

Reset

t_w(rst)

reset pulse width

reset recovery time

reset time

10

0

-

10

0

-

ns

t_rec(rst)

t_rst

[4] [5]

400

[1] t_VD;ACK= time for Acknowledgement signal from SCL LOW to SDA (out) LOW.

[2] t_VD;DAT= minimum time for SDA data out to be valid following SCL LOW.

[3] C_b= total capacitance of one bus line in pF.

[4] Resetting the device while actively communicating on the bus may cause glitches or errant STOP conditions.

[5] Upon reset, the full delay will be the sum of t_rstand the RC time constant of the SDA bus.

PCA9552_5

Product data sheet

Rev. 05 — 9 March 2006

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PCA9552

Philips Semiconductors

16-bit I²C-bus LED driver with programmable blink rates

SDA

t

SP

t

r

f

HD;STA

BUF

t

LOW

SCL

t

SU;STO

HD;STA

SU;STA

t

SU;DAT

HD;DAT

HIGH

P

S

Sr

P

002aaa986

Fig 19. Deﬁnition of timing on the I²C-bus

START

condition

(S)

bit 7

MSB

(A7)

STOP

condition

(P)

bit 6

(A6)

bit 0 acknowledge

(R/W) (A)

protocol

t

HIGH

SU;STA

LOW

1

/f

SCL

SDA

t

BUF

f

t

r

t

HD;DAT

VD;DAT

VD;ACK

SU;STO

002aab175

HD;STA

SU;DAT

Rise and fall times refer to V_ILand V_IH.

Fig 20. I²C-bus timing diagram

ACK or read cycle

START

SCL

SDA

30 %

t

rst

RESET

LEDn

50 %

t

rec(rst)

t

w(rst)

t

rst

50 %

LED off

002aac193

Fig 21. Reset timing

PCA9552_5

Product data sheet

Rev. 05 — 9 March 2006

18 of 28

PCA9552

Philips Semiconductors

16-bit I²C-bus LED driver with programmable blink rates

12. Test information

V

DD

open

GND

V

R

500 Ω

DD

L

V

O

I

PULSE

D.U.T.

GENERATOR

C

50 pF

L

R

T

002aab284

R_L= load resistor for LEDn. R_Lfor SDA and SCL > 1 kΩ (3 mA or less current)

C_L= load capacitance includes jig and probe capacitance

R_T= termination resistance should be equal to the output impedance Z_oof the pulse

generators.

Fig 22. Test circuitry for switching times

PCA9552_5

Product data sheet

Rev. 05 — 9 March 2006

19 of 28

PCA9552

Philips Semiconductors

16-bit I²C-bus LED driver with programmable blink rates

13. Package outline

SO24: plastic small outline package; 24 leads; body width 7.5 mm

SOT137-1

D

E

A

X

c

H

v

M

A

E

y

Z

24

13

Q

A

2

A

(A )

3

A

1

pin 1 index

θ

L

p

L

1

12

w

detail X

e

M

b

p

0

5

10 mm

scale

DIMENSIONS (inch dimensions are derived from the original mm dimensions)

A

max.

(1)

UNIT

mm

A

b

c

D

E

e

H

L

Q

v

w

y

θ

1

2

3

p

E

p

Z

0.3

0.1

2.45

2.25

0.49

0.36

0.32

0.23

15.6

15.2

7.6

7.4

10.65

10.00

1.1

0.4

1.1

1.0

0.9

0.4

2.65

0.1

0.25

0.01

1.27

0.05

1.4

0.25

0.1

8^o

0^o

0.012 0.096

0.004 0.089

0.019 0.013 0.61

0.014 0.009 0.60

0.30

0.29

0.419

0.394

0.043 0.043

0.016 0.039

0.035

0.016

inches

0.055

0.01

0.01 0.004

Note

1. Plastic or metal protrusions of 0.15 mm (0.006 inch) maximum per side are not included.

REFERENCES

OUTLINE

EUROPEAN

PROJECTION

ISSUE DATE

VERSION

IEC

JEDEC

JEITA

99-12-27

03-02-19

SOT137-1

075E05

MS-013

Fig 23. Package outline SOT137-1 (SO24)

PCA9552_5

Product data sheet

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PCA9552

Philips Semiconductors

16-bit I²C-bus LED driver with programmable blink rates

TSSOP24: plastic thin shrink small outline package; 24 leads; body width 4.4 mm

SOT355-1

D

E

A

X

c

H

v

M

A

y

E

Z

13

24

Q

A

2

(A )

3

A

1

pin 1 index

θ

L

p

L

1

12

detail X

w

M

b

p

e

0

2.5

5 mm

scale

DIMENSIONS (mm are the original dimensions)

A

(1)

(2)

(1)

UNIT

A

b

c

D

E

e

H

L

p

Q

v

w

y

Z

θ

1

2

3

p

E

max.

8^o

0^o

0.15

0.05

0.95

0.80

0.30

0.19

0.2

0.1

7.9

7.7

4.5

4.3

6.6

6.2

0.75

0.50

0.4

0.3

0.5

0.2

mm

1.1

0.65

0.25

1

0.2

0.13

0.1

Notes

1. Plastic or metal protrusions of 0.15 mm maximum per side are not included.

2. Plastic interlead protrusions of 0.25 mm maximum per side are not included.

REFERENCES

OUTLINE

EUROPEAN

PROJECTION

ISSUE DATE

VERSION

IEC

JEDEC

JEITA

99-12-27

03-02-19

SOT355-1

MO-153

Fig 24. Package outline SOT355-1 (TSSOP24)

PCA9552_5

Product data sheet

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PCA9552

Philips Semiconductors

16-bit I²C-bus LED driver with programmable blink rates

HVQFN24: plastic thermal enhanced very thin quad flat package; no leads;

24 terminals; body 4 x 4 x 0.85 mm

SOT616-1

B

A

D

terminal 1

index area

A

1

E

c

detail X

e

1

C

1/2 e

y

C

1

e

v

M

C

A

B

b

7

12

w

L

13

6

e

E

h

2

1/2 e

1

18

terminal 1

index area

24

19

X

D

h

0

2.5

5 mm

scale

DIMENSIONS (mm are the original dimensions)

(1)

A

(1)

UNIT

mm

A

b

c

E

e

2

y

D

E

L

v

w

y

1

h

1

h

max.

0.05 0.30

0.00 0.18

4.1

3.9

2.25

1.95

4.1

3.9

2.25

1.95

0.5

0.3

0.05

0.1

1

0.2

0.5

2.5

0.1 0.05

Note

1. Plastic or metal protrusions of 0.075 mm maximum per side are not included.

REFERENCES

OUTLINE

EUROPEAN

PROJECTION

ISSUE DATE

VERSION

IEC

JEDEC

JEITA

01-08-08

02-10-22

SOT616-1

- - -

MO-220

- - -

Fig 25. Package outline SOT616-1 (HVQFN24)

PCA9552_5

Product data sheet

Rev. 05 — 9 March 2006

22 of 28

PCA9552

Philips Semiconductors

16-bit I²C-bus LED driver with programmable blink rates

14. Handling information

Inputs and outputs are protected against electrostatic discharge in normal handling.

However, to be completely safe you must take normal precautions appropriate to handling

integrated circuits.

15. Soldering

15.1 Introduction to soldering surface mount packages

This text gives a very brief insight to a complex technology. A more in-depth account of

soldering ICs can be found in our Data Handbook IC26; Integrated Circuit Packages

(document order number 9398 652 90011).

There is no soldering method that is ideal for all surface mount IC packages. Wave

soldering can still be used for certain surface mount ICs, but it is not suitable for ﬁne pitch

SMDs. In these situations reﬂow soldering is recommended.

15.2 Reﬂow soldering

Reﬂow soldering requires solder paste (a suspension of ﬁne solder particles, ﬂux and

binding agent) to be applied to the printed-circuit board by screen printing, stencilling or

pressure-syringe dispensing before package placement. Driven by legislation and

environmental forces the worldwide use of lead-free solder pastes is increasing.

Several methods exist for reﬂowing; for example, convection or convection/infrared

heating in a conveyor type oven. Throughput times (preheating, soldering and cooling)

vary between 100 seconds and 200 seconds depending on heating method.

Typical reﬂow peak temperatures range from 215 °C to 270 °C depending on solder paste

material. The top-surface temperature of the packages should preferably be kept:

• below 225 °C (SnPb process) or below 245 °C (Pb-free process)

– for all BGA, HTSSON..T and SSOP..T packages

– for packages with a thickness ≥ 2.5 mm

– for packages with a thickness < 2.5 mm and a volume ≥ 350 mm³so called

thick/large packages.

• below 240 °C (SnPb process) or below 260 °C (Pb-free process) for packages with a

thickness < 2.5 mm and a volume < 350 mm³so called small/thin packages.

Moisture sensitivity precautions, as indicated on packing, must be respected at all times.

15.3 Wave soldering

Conventional single wave soldering is not recommended for surface mount devices

(SMDs) or printed-circuit boards with a high component density, as solder bridging and

non-wetting can present major problems.

To overcome these problems the double-wave soldering method was speciﬁcally

developed.

If wave soldering is used the following conditions must be observed for optimal results:

PCA9552_5

Product data sheet

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PCA9552

Philips Semiconductors

16-bit I²C-bus LED driver with programmable blink rates

• Use a double-wave soldering method comprising a turbulent wave with high upward

pressure followed by a smooth laminar wave.

• For packages with leads on two sides and a pitch (e):

– larger than or equal to 1.27 mm, the footprint longitudinal axis is preferred to be

parallel to the transport direction of the printed-circuit board;

– smaller than 1.27 mm, the footprint longitudinal axis must be parallel to the

transport direction of the printed-circuit board.

The footprint must incorporate solder thieves at the downstream end.

• For packages with leads on four sides, the footprint must be placed at a 45° angle to

the transport direction of the printed-circuit board. The footprint must incorporate

solder thieves downstream and at the side corners.

During placement and before soldering, the package must be ﬁxed with a droplet of

adhesive. The adhesive can be applied by screen printing, pin transfer or syringe

dispensing. The package can be soldered after the adhesive is cured.

Typical dwell time of the leads in the wave ranges from 3 seconds to 4 seconds at 250 °C

or 265 °C, depending on solder material applied, SnPb or Pb-free respectively.

A mildly-activated ﬂux will eliminate the need for removal of corrosive residues in most

applications.

15.4 Manual soldering

Fix the component by ﬁrst soldering two diagonally-opposite end leads. Use a low voltage

(24 V or less) soldering iron applied to the ﬂat part of the lead. Contact time must be

limited to 10 seconds at up to 300 °C.

When using a dedicated tool, all other leads can be soldered in one operation within

2 seconds to 5 seconds between 270 °C and 320 °C.

15.5 Package related soldering information

Table 15: Suitability of surface mount IC packages for wave and reﬂow soldering methods

Package ^[1]

Soldering method

Wave

Reﬂow^[2]

BGA, HTSSON..T^[3], LBGA, LFBGA, SQFP,

SSOP..T^[3], TFBGA, VFBGA, XSON

not suitable

suitable

DHVQFN, HBCC, HBGA, HLQFP, HSO, HSOP,

HSQFP, HSSON, HTQFP, HTSSOP, HVQFN,

HVSON, SMS

not suitable^[4]

suitable

PLCC^[5], SO, SOJ

suitable

LQFP, QFP, TQFP

not recommended^{[5] [6]}

not recommended^[7]

not suitable

suitable

SSOP, TSSOP, VSO, VSSOP

CWQCCN..L^[8], PMFP^[9], WQCCN..L^[8]

suitable

not suitable

[1] For more detailed information on the BGA packages refer to the (LF)BGA Application Note (AN01026);

order a copy from your Philips Semiconductors sales ofﬁce.

PCA9552_5

Product data sheet

Rev. 05 — 9 March 2006

24 of 28

PCA9552

Philips Semiconductors

16-bit I²C-bus LED driver with programmable blink rates

[2] All surface mount (SMD) packages are moisture sensitive. Depending upon the moisture content, the

maximum temperature (with respect to time) and body size of the package, there is a risk that internal or

external package cracks may occur due to vaporization of the moisture in them (the so called popcorn

effect). For details, refer to the Drypack information in the Data Handbook IC26; Integrated Circuit

Packages; Section: Packing Methods.

[3] These transparent plastic packages are extremely sensitive to reﬂow soldering conditions and must on no

account be processed through more than one soldering cycle or subjected to infrared reﬂow soldering with

peak temperature exceeding 217 °C ± 10 °C measured in the atmosphere of the reﬂow oven. The package

body peak temperature must be kept as low as possible.

[4] These packages are not suitable for wave soldering. On versions with the heatsink on the bottom side, the

solder cannot penetrate between the printed-circuit board and the heatsink. On versions with the heatsink

on the top side, the solder might be deposited on the heatsink surface.

[5] If wave soldering is considered, then the package must be placed at a 45° angle to the solder wave

direction. The package footprint must incorporate solder thieves downstream and at the side corners.

[6] Wave soldering is suitable for LQFP, QFP and TQFP packages with a pitch (e) larger than 0.8 mm; it is

deﬁnitely not suitable for packages with a pitch (e) equal to or smaller than 0.65 mm.

[7] Wave soldering is suitable for SSOP, TSSOP, VSO and VSSOP packages with a pitch (e) equal to or larger

than 0.65 mm; it is deﬁnitely not suitable for packages with a pitch (e) equal to or smaller than 0.5 mm.

[8] Image sensor packages in principle should not be soldered. They are mounted in sockets or delivered

pre-mounted on ﬂex foil. However, the image sensor package can be mounted by the client on a ﬂex foil by

using a hot bar soldering process. The appropriate soldering proﬁle can be provided on request.

[9] Hot bar soldering or manual soldering is suitable for PMFP packages.

16. Abbreviations

Table 16: Abbreviations

Acronym

CDM

DSP

Description

Charged Device Model

Digital Signal Processor

ElectroStatic Discharge

Human Body Model

General Purpose Input/Output

Integrated Circuit

ESD

HBM

GPIO

IC

I²C-bus

Inter IC bus

LED

Light Emitting Diode

Microcontroller

MCU

MM

Machine Model

MPU

POR

PWM

SMBus

Microprocessor

Power-On Reset

Pulse Width Modulation

System Management Bus

PCA9552_5

Product data sheet

Rev. 05 — 9 March 2006

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PCA9552

Philips Semiconductors

16-bit I²C-bus LED driver with programmable blink rates

17. Revision history

Table 17: Revision history

Document ID

PCA9552_5

Modiﬁcations:

Release date Data sheet status

20060309 Product data sheet

Change notice Doc. number

Supersedes

-

PCA9552_4

• The format of this data sheet has been redesigned to comply with the new presentation and

information standard of Philips Semiconductors.

• Table 1 “Ordering information”: changed Topside mark of TSSOP24 package from

‘PCA9552PW’ to ‘PCA9552’

• Table 2 “Pin description”: added Table note 1 regarding V_SSpin on HVQFN24 package

• Section 6.6 “External RESET”: changed symbol “t_W” to “t_w(rst)

• Figure 11: changed symbol “t_pv” to “t_v(Q)

”

• Figure 13: changed symbol “t_ph” to “t_h(D)”; changed symbol “t_ps” to “t_su(D)

”

• Section 8.1 “Minimizing I_DDwhen the I/O is used to control LEDs”:

–

1st paragraph, 3rd sentence: changed symbol “∆I_DD” to “∆I_stb”

2nd paragraph, 4th sentence: changed symbol “V_IN” to “V_I”

• Table 12 “Limiting values”:

–

changed parameter description of V_I/Ofrom “DC voltage on an I/O” to “voltage on an

input/output pin”

–

changed symbol “I_I/O(DC output current on an I/O)” to ‘I_O(LEDn)(output current on pin LEDn)

• Table 13 “Static characteristics”:

–

moved second sentence of description below title to (new)Table note 1 and added its

reference at column “Typ”

–

changed symbol “∆I_DD” to “∆I_stb

”

under subsection “I/Os”, changed symbol “I_L” to “I_LI”

• Table 14 “Dynamic characteristics”:

–

updated parameter descriptions

–

under subsection “Port timing”: changed symbol “t_PV” to “t_v(Q)”; changed symbol “t_PS” to

“t_su(D)”; changed symbol “t_PH” to “t_h(D)

”

–

under subsection “Reset”: changed symbol “t_W” to “t_w(rst)”; changed symbol “t_REC” to “t_rec(rst)”;

changed symbol “t_RESET” to “t_rst” (also in Table note 5)

• Figure 21 “Reset timing” modiﬁed to harmonize letter symbols

PCA9552_4

PCA9552_3

20041001

Product data sheet

-

9397 750 13727 PCA9552_3

20030502

Product data

853-2374 29857 9397 750 11463 PCA9552_2

of 2003 Apr 24

PCA9552_2

PCA9552_1

20030224

20020927

Product data

853-2374 29331 9397 750 11156 PCA9552_1

of 2002 Dec 20

853-2374 28878 9397 750 10329

of 2002 Sep 09

-

PCA9552_5

Product data sheet

Rev. 05 — 9 March 2006

26 of 28

PCA9552

Philips Semiconductors

16-bit I²C-bus LED driver with programmable blink rates

18. Data sheet status

Level Data sheet status^[1]Product status^{[2] [3]}

Deﬁnition

I

Objective data

Development

This data sheet contains data from the objective speciﬁcation for product development. Philips

Semiconductors reserves the right to change the speciﬁcation in any manner without notice.

II

Preliminary data

Qualiﬁcation

This data sheet contains data from the preliminary speciﬁcation. Supplementary data will be published

at a later date. Philips Semiconductors reserves the right to change the speciﬁcation without notice, in

order to improve the design and supply the best possible product.

III

Product data

Production

This data sheet contains data from the product speciﬁcation. Philips Semiconductors reserves the

right to make changes at any time in order to improve the design, manufacturing and supply. Relevant

changes will be communicated via a Customer Product/Process Change Notiﬁcation (CPCN).

[1]

[2]

Please consult the most recently issued data sheet before initiating or completing a design.

The product status of the device(s) described in this data sheet may have changed since this data sheet was published. The latest information is available on the Internet at

URL http://www.semiconductors.philips.com.

[3]

For data sheets describing multiple type numbers, the highest-level product status determines the data sheet status.

customers using or selling these products for use in such applications do so

at their own risk and agree to fully indemnify Philips Semiconductors for any

damages resulting from such application.

19. Deﬁnitions

Short-form speciﬁcation — The data in a short-form speciﬁcation is

extracted from a full data sheet with the same type number and title. For

detailed information see the relevant data sheet or data handbook.

Right to make changes — Philips Semiconductors reserves the right to

make changes in the products - including circuits, standard cells, and/or

software - described or contained herein in order to improve design and/or

performance. When the product is in full production (status ‘Production’),

relevant changes will be communicated via a Customer Product/Process

Change Notiﬁcation (CPCN). Philips Semiconductors assumes no

responsibility or liability for the use of any of these products, conveys no

license or title under any patent, copyright, or mask work right to these

products, and makes no representations or warranties that these products are

free from patent, copyright, or mask work right infringement, unless otherwise

speciﬁed.

Limiting values deﬁnition — Limiting values given are in accordance with

the Absolute Maximum Rating System (IEC 60134). Stress above one or

more of the limiting values may cause permanent damage to the device.

These are stress ratings only and operation of the device at these or at any

other conditions above those given in the Characteristics sections of the

speciﬁcation is not implied. Exposure to limiting values for extended periods

may affect device reliability.

Application information — Applications that are described herein for any

of these products are for illustrative purposes only. Philips Semiconductors

make no representation or warranty that such applications will be suitable for

the speciﬁed use without further testing or modiﬁcation.

21. Trademarks

Notice — All referenced brands, product names, service names and

trademarks are the property of their respective owners.

I²C-bus — logo is a trademark of Koninklijke Philips Electronics N.V.

20. Disclaimers

Life support — These products are not designed for use in life support

appliances, devices, or systems where malfunction of these products can

reasonably be expected to result in personal injury. Philips Semiconductors

22. Contact information

For additional information, please visit: http://www.semiconductors.philips.com

For sales ofﬁce addresses, send an email to: sales.addresses@www.semiconductors.philips.com

PCA9552_5

Product data sheet

Rev. 05 — 9 March 2006

27 of 28

PCA9552

Philips Semiconductors

16-bit I²C-bus LED driver with programmable blink rates

23. Contents

1

2

3

4

General description . . . . . . . . . . . . . . . . . . . . . . 1

Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Ordering information. . . . . . . . . . . . . . . . . . . . . 2

Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 2

16

17

18

19

20

21

22

Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . 25

Revision history . . . . . . . . . . . . . . . . . . . . . . . 26

Data sheet status. . . . . . . . . . . . . . . . . . . . . . . 27

Deﬁnitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Trademarks . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Contact information . . . . . . . . . . . . . . . . . . . . 27

5

5.1

5.2

Pinning information. . . . . . . . . . . . . . . . . . . . . . 3

Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Pin description . . . . . . . . . . . . . . . . . . . . . . . . . 4

6

6.1

6.2

6.2.1

6.3

6.3.1

6.3.2

6.3.3

6.3.4

6.3.5

6.3.6

6.3.7

6.4

Functional description . . . . . . . . . . . . . . . . . . . 5

Device address. . . . . . . . . . . . . . . . . . . . . . . . . 5

Control Register . . . . . . . . . . . . . . . . . . . . . . . . 5

Control Register deﬁnition . . . . . . . . . . . . . . . . 6

Register descriptions . . . . . . . . . . . . . . . . . . . . 6

INPUT0 - Input register 0 . . . . . . . . . . . . . . . . . 6

INPUT1 - Input register 1 . . . . . . . . . . . . . . . . . 6

PCS0 - Frequency Prescaler 0 . . . . . . . . . . . . . 7

PWM0 - Pulse Width Modulation 0. . . . . . . . . . 7

PCS1 - Frequency Prescaler 1 . . . . . . . . . . . . . 7

PWM1 - Pulse Width Modulation 1. . . . . . . . . . 7

LS0 to LS3 - LED selector registers . . . . . . . . . 8

Pins used as GPIOs . . . . . . . . . . . . . . . . . . . . . 9

Power-on reset . . . . . . . . . . . . . . . . . . . . . . . . . 9

External RESET . . . . . . . . . . . . . . . . . . . . . . . . 9

6.5

6.6

7

Characteristics of the I²C-bus. . . . . . . . . . . . . 10

Bit transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

START and STOP conditions . . . . . . . . . . . . . 10

System conﬁguration . . . . . . . . . . . . . . . . . . . 10

Acknowledge . . . . . . . . . . . . . . . . . . . . . . . . . 11

Bus transactions . . . . . . . . . . . . . . . . . . . . . . . 12

7.1

7.1.1

7.2

7.3

7.4

8

8.1

Application design-in information . . . . . . . . . 13

Minimizing I_DDwhen the I/O is used to control

LEDs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Programming example . . . . . . . . . . . . . . . . . . 14

8.2

9

Limiting values. . . . . . . . . . . . . . . . . . . . . . . . . 15

Static characteristics. . . . . . . . . . . . . . . . . . . . 15

Dynamic characteristics . . . . . . . . . . . . . . . . . 17

Test information. . . . . . . . . . . . . . . . . . . . . . . . 19

Package outline . . . . . . . . . . . . . . . . . . . . . . . . 20

Handling information. . . . . . . . . . . . . . . . . . . . 23

10

11

12

13

14

15

15.1

Soldering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Introduction to soldering surface mount

packages . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Reﬂow soldering . . . . . . . . . . . . . . . . . . . . . . . 23

Wave soldering . . . . . . . . . . . . . . . . . . . . . . . . 23

Manual soldering . . . . . . . . . . . . . . . . . . . . . . 24

Package related soldering information . . . . . . 24

15.2

15.3

15.4

15.5

All rights are reserved. Reproduction in whole or in part is prohibited without the prior

written consent of the copyright owner. The information presented in this document does

not form part of any quotation or contract, is believed to be accurate and reliable and may

be changed without notice. No liability will be accepted by the publisher for any

consequence of its use. Publication thereof does not convey nor imply any license under

patent- or other industrial or intellectual property rights.

Date of release: 9 March 2006

Document number: PCA9552_5

Published in The Netherlands


型号：	PCA9552BS,118
厂家：	NXP
描述：	PCA9552 - 16-bit I2C-bus LED driver with programmable blink rates QFN 24-Pin PC 驱动接口集成电路
文件：	总28页 (文件大小：159K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

PCA9552BS,118 [NXP]

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