935286881118_技术文档

PCA9553

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

Rev. 06 — 29 December 2008

Product data sheet

1. General description

The PCA9553 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

PCA9553 LED blinker instead requires only the initial set-up command to program

BLINK RATE 1 and BLINK RATE 2 (i.e., the frequency and duty cycle). 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 100 mA per package.

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

Input/Output (GPIO) expansion.

Power-On Reset (POR) initializes the registers to their default state, all zeroes, causing

the bits to be set HIGH (LED off).

Due to pin limitations, the PCA9553 is not featured with hardware address pins. The

PCA9553/01 and the PCA9553/02 have different ﬁxed I²C-bus addresses allowing

operation of both on the same bus.

2. Features

I 4 LED drivers (on, off, ﬂashing at a programmable rate)

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

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

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

I Internal oscillator requires no external components

I I²C-bus interface logic compatible with SMBus

I Internal power-on reset

I Noise ﬁlter on SCL/SDA inputs

I 4 open-drain outputs directly drive LEDs to 25 mA

I Controlled edge rates to minimize ground bounce

I No glitch on power-up

I Supports hot insertion

I Low standby current

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

I 0 Hz to 400 kHz clock frequency

PCA9553

NXP Semiconductors

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

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

JESD22-A115 and 1000 V CDM per JESD22-C101

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

I Packages offered: SO8, TSSOP8 (MSOP8), HVSON8

3. Ordering information

Table 1.

Ordering information

Type number

Package

Name

SO8

Description

Version

PCA9553D/01

PCA9553D/02

plastic small outline package; 8 leads;

body width 3.9 mm

SOT96-1

PCA9553DP/01 TSSOP8^[1]plastic thin shrink small outline package; 8 leads;

SOT505-1

SOT908-1

body width 3 mm

PCA9553DP/02

PCA9553TK^[2]

PCA9553TK/02

HVSON8 plastic thermal enhanced very thin small outline

package; no leads; 8 terminals; body 3 × 3 × 0.85 mm

[1] Also known as MSOP8.

[2] PCA9553TK uses version /01 address.

4. Marking

Table 2.

Marking codes

Type number

PCA9553D/01

PCA9553D/02

PCA9553DP/01

PCA9553DP/02

PCA9553TK

Marking code

9553/1

9553/2

P53/1

P53/2

P53/1

PCA9553TK/02

P53/2

PCA9553_6

Product data sheet

Rev. 06 — 29 December 2008

2 of 26

PCA9553

NXP Semiconductors

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

5. Block diagram

PCA9553

INPUT

REGISTER

2

SCL

SDA

INPUT

FILTERS

I C-BUS

LED SELECT (LSn)

REGISTER

CONTROL

0

1

POWER-ON

RESET

LEDn

V

DD

BLINK0

BLINK1

PRESCALER 0

REGISTER

PWM0

REGISTER

PRESCALER 1

REGISTER

PWM1

REGISTER

OSCILLATOR

V

SS

002aad745

Only one I/O shown for clarity.

Fig 1. Block diagram

PCA9553_6

Product data sheet

Rev. 06 — 29 December 2008

3 of 26

PCA9553

NXP Semiconductors

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

6. Pinning information

6.1 Pinning

1

2

3

4

8

7

6

5

LED0

LED1

LED2

V

DD

1

2

3

4

8

7

6

5

LED0

LED1

LED2

V

DD

SDA

SCL

PCA9553D/01

PCA9553D/02

SDA

SCL

PCA9553DP/01

PCA9553DP/02

V

SS

LED3

V

SS

LED3

002aad679

002aad678

Fig 2. Pin conﬁguration for SO8

Fig 3. Pin conﬁguration for TSSOP8

PCA9553TK

PCA9553TK/02

terminal 1

index area

LED0

LED1

LED2

1

2

3

4

8

7

6

5

V

DD

SDA

SCL

V

LED3

SS

002aad680

Transparent top view

Fig 4. Pin conﬁguration for HVSON8

6.2 Pin description

Table 3.

Pin description

Symbol

LED0

LED1

LED2

V_SS

1

Description

LED driver 0

LED driver 1

LED driver 2

supply ground

LED driver 3

serial clock line

serial data line

supply voltage

2

3

4^[1]

LED3

SCL

5

6

SDA

7

V_DD

8

[1] HVSON8 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

PCB in the thermal pad region.

PCA9553_6

Product data sheet

Rev. 06 — 29 December 2008

4 of 26

PCA9553

NXP Semiconductors

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

7. Functional description

Refer to Figure 1 “Block diagram”.

7.1 Device address

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

accessing. The address of the PCA9553/01 is shown in Figure 5 and PCA9553/02 in

Figure 6.

PCA9553TK uses the version /01 address.

slave address

1

0

1

0

R/W

1

0

1

R/W

002aad742

002aad743

Fig 5. PCA9553/01 slave address

Fig 6. PCA9553/02 slave 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.

7.2 Control register

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

a byte to the PCA9553 which will be stored in the Control register.

0

AI

0

B2 B1 B0

register address

002aad744

Auto-Increment

flag

Reset state: 00h

Fig 7. Control register

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

If the Auto-Increment ﬂag is set, the three 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 ‘000’ 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’ (B2 B1 B0 ≠ 0 0 0).

Only the 3 least signiﬁcant bits are affected by the AI ﬂag.

Unused bits must be programmed with zeroes.

PCA9553_6

Product data sheet

Rev. 06 — 29 December 2008

5 of 26

PCA9553

NXP Semiconductors

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

Table 4.

Control register deﬁnition

B2

0

B1

0

B0

0

Register name

INPUT

PSC0

Type

Register function

input register

read

0

1

read/write

frequency prescaler 0

PWM register 0

frequency prescaler 1

PWM register 1

LED selector

0

1

0

PWM0

PSC1

0

1

0

PWM1

LS0

1

0

1

7.3 Register descriptions

7.3.1 INPUT - Input register

The INPUT register reﬂects the state of the device pins. Writes to this register will be

acknowledged but will have no effect.

Table 5.

Bit

INPUT - Input register description

7

6

5

4

3

LED3

X

2

LED2

X

1

LED1

X

0

LED0

X

Symbol INPUT[7] INPUT[6] INPUT[5] INPUT[4]

Default

0

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

.

7.3.2 PSC0 - 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

Default

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

1

7.3.3 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

PCA9553_6

Product data sheet

Rev. 06 — 29 December 2008

6 of 26

PCA9553

NXP Semiconductors

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

7.3.4 PSC1 - 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

Default

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

1

7.3.5 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

7.3.6 LS0 - LED selector register

The LS0 LED select register determines 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 - LED selector register 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

PCA9553_6

Product data sheet

Rev. 06 — 29 December 2008

7 of 26

PCA9553

NXP Semiconductors

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

7.4 Pins used as general purpose I/Os

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

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.

7.5 Power-on reset

When power is applied to V_DD, an internal Power-On Reset (POR) holds the PCA9553 in

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

and the PCA9553 registers are initialized to their default states, with all outputs in the OFF

state. Thereafter, V_DDmust be lowered below 0.2 V to reset the device.

8. 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.

8.1 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 8).

SDA

SCL

data line

stable;

data valid

change

of data

allowed

mba607

Fig 8. Bit transfer

8.1.1 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 9).

PCA9553_6

Product data sheet

Rev. 06 — 29 December 2008

8 of 26

PCA9553

NXP Semiconductors

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

SDA

SCL

SDA

SCL

S

P

STOP condition

mba608

START condition

Fig 9. Deﬁnition of START and STOP conditions

8.2 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 10).

SDA

SCL

SLAVE

TRANSMITTER/

RECEIVER

MASTER

TRANSMITTER/

RECEIVER

MASTER

TRANSMITTER/

RECEIVER

2

SLAVE

RECEIVER

MASTER

TRANSMITTER

I C-BUS

MULTIPLEXER

SLAVE

002aaa966

Fig 10. System conﬁguration

8.3 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 time and hold

time 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.

PCA9553_6

Product data sheet

Rev. 06 — 29 December 2008

9 of 26

PCA9553

NXP Semiconductors

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

data output

by transmitter

not acknowledge

acknowledge

data output

by receiver

SCL from master

1

2

8

9

S

clock pulse for

START

condition

acknowledgement

002aaa987

Fig 11. Acknowledgement on the I²C-bus

8.4 Bus transactions

SCL

1

2

3

4

5

6

7

8

9

slave address

command byte

AI B2 B1 B0

data to register

DATA 1

SDA

S

1

0

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

002aad746

Fig 12. Write to register

slave address

command byte

AI B2 B1 B0 A

(cont.)

SDA

S

1

0

1

0

A

0

START condition

R/W

acknowledge

from slave

acknowledge

from slave

slave address

data from register

DATA (first byte)

data from register

DATA (last byte)

(cont.)

S

1

0

1

0

1

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

002aad747

Fig 13. Read from register

PCA9553_6

Product data sheet

Rev. 06 — 29 December 2008

10 of 26

PCA9553

NXP Semiconductors

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

no acknowledge

from master

slave address

data from port

DATA 1

data from port

DATA 4

SDA

S

1

0

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

002aad748

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

PCA9553/01 shown.

Fig 14. Read input port register

9. Application design-in information

5 V

10 kΩ

2

I C-BUS/SMBus

V

DD

MASTER

SDA

SCL

LED0

LED1

LED2

LED3

SCL

PCA9553

V

SS

002aad749

Fig 15. Typical application

9.1 Minimizing I_DDwhen the I/Os are 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_DDin 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 16 shows a high value resistor in parallel with the LED. Figure 17 shows V_DDless

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

or above V_DDand prevents additional supply current consumption when the LED is off.

PCA9553_6

Product data sheet

Rev. 06 — 29 December 2008

11 of 26

PCA9553

NXP Semiconductors

4-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 16. High value resistor in parallel with

the LED

Fig 17. Device supplied by a lower voltage

9.2 Programming example

The following example shows how to set LED0 and LED1 off. It will then set LED2 to blink

at 1 Hz, 50 % duty cycle. LED3 will be set to blink at 4 Hz, 25 % duty cycle. PCA9553/01

is used in this example.

Table 11. Programming PCA9553

Program sequence

I²C-bus

S

START

PCA9553 address

C4h

11h

PSC0 subaddress + Auto-Increment

Set prescaler PSC0 to achieve a period of 1 second:

PSC0 + 1

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 PSC1 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 on, LED1 off, LED2 set to blink at PSC0, PWM0, LED3 set to blink at E4h

PSC1, PWM1

STOP

P

PCA9553_6

Product data sheet

Rev. 06 — 29 December 2008

12 of 26

PCA9553

NXP Semiconductors

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

10. 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

V

_SS− 0.5

V

I_O(LEDn)

I_SS

-

±25

100

400

+150

+85

mA

mW

°C

-

P_tot

-

T_stg

−65

−40

T_amb

operating

°C

PCA9553_6

Product data sheet

Rev. 06 — 29 December 2008

13 of 26

PCA9553

NXP Semiconductors

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

11. 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

Supplies

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

500

µA

I_stb

standby current

Standby mode; V_DD= 5.5 V; no load;

V_I= V_DDor V_SS; f_SCL= 100 kHz

-

1.9

-

3.0

µA

∆I_DD

additional quiescent

supply current

Standby mode; V_DD= 5.5 V;

every LED I/O at V_I= 4.3 V;

325

f_SCL= 0 kHz

[2]

V_POR

power-on reset voltage

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

3.7

I/Os

V_IL

V_IH

I_OL

LOW-level input voltage

HIGH-level input voltage

LOW-level output current

−0.5

-

+0.8

5.5

V

2.0

V_OL= 0.4 V

[3]

V_DD= 2.3 V

9

-

mA

V_DD= 3.0 V

12

15

V_DD= 5.0 V

V_OL= 0.7 V

[3]

V_DD= 2.3 V

15

20

25

−1

-

mA

µA

V_DD= 3.0 V

-

V_DD= 5.0 V

-

I_LI

input leakage current

V_DD= 3.6 V; V_I= 0 V or V_DD

-

+1

5

C_io

input/output capacitance

2.1

pF

[1] Typical limits at V_DD= 3.3 V, T_amb= 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 the device must be limited to a maximum current of 100 mA.

PCA9553_6

Product data sheet

Rev. 06 — 29 December 2008

14 of 26

PCA9553

NXP Semiconductors

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

002aac191

002aac192

20 %

(1)

20 %

(1)

percent

variation

0 %

(2)

0 %

−20 %

−40 %

(2)

(3)

−20 %

(3)

−40 %

−40

−20

0

20

40

60

80

amb

100

(°C)

−40

−20

0

20

40

60

80

amb

100

(°C)

T

(1) maximum

(2) average

(3) minimum

(1) maximum

(2) average

(3) minimum

Fig 18. Typical frequency variation over process at

_DD= 2.3 V to 3.0 V

Fig 19. Typical frequency variation over process at

V_DD= 3.0 V to 5.5 V

V

PCA9553_6

Product data sheet

Rev. 06 — 29 December 2008

15 of 26

PCA9553

NXP Semiconductors

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

12. 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_r

data set-up time

250

4.7

4.0

-

100

1.3

LOW period of the SCL clock

HIGH period of the SCL clock

rise time of both SDA and SCL signals

fall time of both SDA and SCL signals

-

0.6

-

[3]

1000

300

50

20 + 0.1C_b

-

300

50

t_f

-

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 set-up time

data input hold time

-

100

1

200

-

100

1

200

ns

µs

t_su(D)

-

t_h(D)

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

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

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

PCA9553_6

Product data sheet

Rev. 06 — 29 December 2008

16 of 26

PCA9553

NXP Semiconductors

4-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 20. Deﬁnition of timing

START

condition

(S)

bit 7

MSB

(A7)

STOP

condition

(P)

bit 6

(A6)

bit 1

(D1)

bit 0

(D0)

acknowledge

(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

002aab285

HD;STA

SU;DAT

Rise and fall times refer to V_ILand V_IH.

Fig 21. I²C-bus timing diagram

13. Test information

V

open

DD

V

SS

V

R

500 Ω

DD

L

V

O

I

PULSE

DUT

GENERATOR

C

50 pF

L

R

T

002aab880

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

PCA9553_6

Product data sheet

Rev. 06 — 29 December 2008

17 of 26

PCA9553

NXP Semiconductors

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

14. Package outline

SO8: plastic small outline package; 8 leads; body width 3.9 mm

SOT96-1

D

E

A

X

v

c

y

H

M

A

E

Z

5

8

Q

A

2

A

(A )

3

A

1

pin 1 index

θ

L

p

L

1

4

e

w

M

detail X

b

p

0

2.5

5 mm

scale

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

A

(1)

(2)

UNIT

A

b

c

D

E

e

H

L

p

Q

v

w

y

Z

θ

1

2

3

p

E

max.

0.25

0.10

1.45

1.25

0.49

0.36

0.25

0.19

5.0

4.8

4.0

3.8

6.2

5.8

1.0

0.4

0.7

0.6

0.7

0.3

mm

1.27

0.05

1.05

0.041

1.75

0.25

0.01

0.25

0.01

0.25

0.1

8^o

0^o

0.010 0.057

0.004 0.049

0.019 0.0100 0.20

0.014 0.0075 0.19

0.16

0.15

0.244

0.228

0.039 0.028

0.016 0.024

0.028

0.012

inches 0.069

0.01 0.004

Notes

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

2. Plastic or metal protrusions of 0.25 mm (0.01 inch) maximum per side are not included.

REFERENCES

OUTLINE

EUROPEAN

PROJECTION

ISSUE DATE

VERSION

IEC

JEDEC

JEITA

99-12-27

03-02-18

SOT96-1

076E03

MS-012

Fig 23. Package outline SOT96-1 (SO8)

PCA9553_6

Product data sheet

Rev. 06 — 29 December 2008

18 of 26

PCA9553

NXP Semiconductors

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

TSSOP8: plastic thin shrink small outline package; 8 leads; body width 3 mm

SOT505-1

D

E

A

X

c

y

H

v

M

A

E

Z

5

8

A

(A )

2

A

3

A

1

pin 1 index

θ

L

p

L

1

4

detail X

e

w M

b

p

0

2.5

5 mm

scale

DIMENSIONS (mm are the original dimensions)

A

(1)

(2)

(1)

A

b

c

D

E

e

H

E

L

p

UNIT

v

w

y

Z

θ

1

2

3

p

max.

0.15

0.05

0.95

0.80

0.45

0.25

0.28

0.15

3.1

2.9

3.1

2.9

5.1

4.7

0.7

0.4

0.70

0.35

6°

0°

mm

1.1

0.65

0.25

0.94

0.1

Notes

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

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

REFERENCES

OUTLINE

EUROPEAN

PROJECTION

ISSUE DATE

VERSION

IEC

JEDEC

JEITA

99-04-09

03-02-18

SOT505-1

Fig 24. Package outline SOT505-1 (TSSOP8)

PCA9553_6

Product data sheet

Rev. 06 — 29 December 2008

19 of 26

PCA9553

NXP Semiconductors

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

HVSON8: plastic thermal enhanced very thin small outline package; no leads;

8 terminals; body 3 x 3 x 0.85 mm

SOT908-1

0

1

2 mm

scale

X

D

B

A

E

A

1

c

detail X

terminal 1

index area

e

1

terminal 1

index area

C

M

v

C

A

B

e

b

y

w

C

1

4

L

exposed tie bar (4×)

E

h

exposed tie bar (4×)

8

5

D

h

DIMENSIONS (mm are the original dimensions)

(1)

A

max.

(1)

UNIT

A

b

E

e

y

c

D

E

L

v

w

y

1

h

1

h

0.05

0.00

0.3

0.2

3.1

2.9

2.25

1.95

3.1

2.9

1.65

1.35

0.5

0.3

mm

0.05

0.1

1

0.2

0.5

1.5

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

05-09-26

05-10-05

SOT908-1

MO-229

Fig 25. Package outline SOT908-1 (HVSON8)

PCA9553_6

Product data sheet

Rev. 06 — 29 December 2008

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PCA9553

NXP Semiconductors

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

15. Handling information

All input and output pins are protected against ElectroStatic Discharge (ESD) under

normal handling. When handling ensure that the appropriate precautions are taken as

described in JESD625-A or equivalent standards.

16. Soldering of SMD packages

This text provides a very brief insight into a complex technology. A more in-depth account

of soldering ICs can be found in Application Note AN10365 “Surface mount reﬂow

soldering description”.

16.1 Introduction to soldering

Soldering is one of the most common methods through which packages are attached to

Printed Circuit Boards (PCBs), to form electrical circuits. The soldered joint provides both

the mechanical and the electrical connection. There is no single soldering method that is

ideal for all IC packages. Wave soldering is often preferred when through-hole and

Surface Mount Devices (SMDs) are mixed on one printed wiring board; however, it is not

suitable for ﬁne pitch SMDs. Reﬂow soldering is ideal for the small pitches and high

densities that come with increased miniaturization.

16.2 Wave and reﬂow soldering

Wave soldering is a joining technology in which the joints are made by solder coming from

a standing wave of liquid solder. The wave soldering process is suitable for the following:

• Through-hole components

• Leaded or leadless SMDs, which are glued to the surface of the printed circuit board

Not all SMDs can be wave soldered. Packages with solder balls, and some leadless

packages which have solder lands underneath the body, cannot be wave soldered. Also,

leaded SMDs with leads having a pitch smaller than ~0.6 mm cannot be wave soldered,

due to an increased probability of bridging.

The reﬂow soldering process involves applying solder paste to a board, followed by

component placement and exposure to a temperature proﬁle. Leaded packages,

packages with solder balls, and leadless packages are all reﬂow solderable.

Key characteristics in both wave and reﬂow soldering are:

• Board speciﬁcations, including the board ﬁnish, solder masks and vias

• Package footprints, including solder thieves and orientation

• The moisture sensitivity level of the packages

• Package placement

• Inspection and repair

• Lead-free soldering versus SnPb soldering

16.3 Wave soldering

Key characteristics in wave soldering are:

PCA9553_6

Product data sheet

Rev. 06 — 29 December 2008

21 of 26

PCA9553

NXP Semiconductors

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

• Process issues, such as application of adhesive and ﬂux, clinching of leads, board

transport, the solder wave parameters, and the time during which components are

exposed to the wave

• Solder bath speciﬁcations, including temperature and impurities

16.4 Reﬂow soldering

Key characteristics in reﬂow soldering are:

• Lead-free versus SnPb soldering; note that a lead-free reﬂow process usually leads to

higher minimum peak temperatures (see Figure 26) than a SnPb process, thus

reducing the process window

• Solder paste printing issues including smearing, release, and adjusting the process

window for a mix of large and small components on one board

• Reﬂow temperature proﬁle; this proﬁle includes preheat, reﬂow (in which the board is

heated to the peak temperature) and cooling down. It is imperative that the peak

temperature is high enough for the solder to make reliable solder joints (a solder paste

characteristic). In addition, the peak temperature must be low enough that the

packages and/or boards are not damaged. The peak temperature of the package

depends on package thickness and volume and is classiﬁed in accordance with

Table 15 and 16

Table 15. SnPb eutectic process (from J-STD-020C)

Package thickness (mm) Package reﬂow temperature (°C)

Volume (mm³)

< 350

235

≥ 350

220

< 2.5

≥ 2.5

220

Table 16. Lead-free process (from J-STD-020C)

Package thickness (mm) Package reﬂow temperature (°C)

Volume (mm³)

< 350

260

350 to 2000

> 2000

260

< 1.6

260

250

245

1.6 to 2.5

> 2.5

260

245

250

245

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

times.

Studies have shown that small packages reach higher temperatures during reﬂow

soldering, see Figure 26.

PCA9553_6

Product data sheet

Rev. 06 — 29 December 2008

22 of 26

PCA9553

NXP Semiconductors

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

maximum peak temperature

= MSL limit, damage level

temperature

minimum peak temperature

= minimum soldering temperature

peak

temperature

time

001aac844

MSL: Moisture Sensitivity Level

Fig 26. Temperature proﬁles for large and small components

For further information on temperature proﬁles, refer to Application Note AN10365

“Surface mount reﬂow soldering description”.

17. Abbreviations

Table 17. Abbreviations

Acronym

AI

Description

Auto-Increment

CDM

DSP

Charged-Device Model

Digital Signal Processor

ElectroStatic Discharge

General Purpose Input/Output

Human Body Model

Inter-Integrated Circuit bus

Input/Output

ESD

GPIO

HBM

I²C-bus

I/O

LED

Light Emitting Diode

MicroController Unit

Machine Model

MCU

MM

MPU

PCB

MicroProcessor Unit

Printed-Circuit Board

Power-On Reset

POR

PWM

SMBus

Pulse Width Modulation

System Management Bus

PCA9553_6

Product data sheet

Rev. 06 — 29 December 2008

23 of 26

PCA9553

NXP Semiconductors

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

18. Revision history

Table 18. Revision history

Document ID

PCA9553_6

Modiﬁcations:

Release date

Data sheet status

Change notice

Supersedes

20081229

Product data sheet

-

PCA9553_5

• Table 2 “Marking codes”:

–

marking code for type number PCA9553D/01 changed from “P9553/1” to “9553/1”

marking code for type number PCA9553D/02 changed from “P9553/2” to “9553/2”

marking code for type number PCA9553TK changed from “P53” to “P53/1”

PCA9553_5

PCA9553_4

20080422

20060818

20041001

Product data sheet

-

PCA9553_4

PCA9553_3

PCA9553_2

PCA9553_3

(9397 750 13728)

PCA9553_2

(9397 750 11464)

20030502

20021213

Product data

ECN 853-2397 29856 PCA9553_1

dated 2003 Apr 24

PCA9553_1

(9397 750 10859)

ECN 853-2397 29264

dated 2002 Dec 09

PCA9553_6

Product data sheet

Rev. 06 — 29 December 2008

24 of 26

PCA9553

NXP Semiconductors

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

19. Legal information

19.1 Data sheet status

Document status^[1][2]

Product status^[3]

Development

Deﬁnition

Objective [short] data sheet

This document contains data from the objective speciﬁcation for product development.

This document contains data from the preliminary speciﬁcation.

This document contains the product speciﬁcation.

Preliminary [short] data sheet Qualiﬁcation

Product [short] data sheet Production

[1]

[2]

[3]

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

The term ‘short data sheet’ is explained in section “Deﬁnitions”.

The product status of device(s) described in this document may have changed since this document was published and may differ in case of multiple devices. The latest product status

information is available on the Internet at URL http://www.nxp.com.

to result in personal injury, death or severe property or environmental

19.2 Deﬁnitions

damage. NXP Semiconductors accepts no liability for inclusion and/or use of

NXP Semiconductors products in such equipment or applications and

therefore such inclusion and/or use is at the customer’s own risk.

Draft — The document is a draft version only. The content is still under

internal review and subject to formal approval, which may result in

modiﬁcations or additions. NXP Semiconductors does not give any

representations or warranties as to the accuracy or completeness of

information included herein and shall have no liability for the consequences of

use of such information.

Applications — Applications that are described herein for any of these

products are for illustrative purposes only. NXP Semiconductors makes no

representation or warranty that such applications will be suitable for the

speciﬁed use without further testing or modiﬁcation.

Limiting values — Stress above one or more limiting values (as deﬁned in

the Absolute Maximum Ratings System of IEC 60134) may cause permanent

damage to the device. Limiting values are stress ratings only and operation of

the device at these or any other conditions above those given in the

Characteristics sections of this document is not implied. Exposure to limiting

values for extended periods may affect device reliability.

Short data sheet — A short data sheet is an extract from a full data sheet

with the same product type number(s) and title. A short data sheet is intended

for quick reference only and should not be relied upon to contain detailed and

full information. For detailed and full information see the relevant full data

sheet, which is available on request via the local NXP Semiconductors sales

ofﬁce. In case of any inconsistency or conﬂict with the short data sheet, the

full data sheet shall prevail.

Terms and conditions of sale — NXP Semiconductors products are sold

subject to the general terms and conditions of commercial sale, as published

at http://www.nxp.com/proﬁle/terms, including those pertaining to warranty,

intellectual property rights infringement and limitation of liability, unless

explicitly otherwise agreed to in writing by NXP Semiconductors. In case of

any inconsistency or conﬂict between information in this document and such

terms and conditions, the latter will prevail.

19.3 Disclaimers

General — Information in this document is believed to be accurate and

reliable. However, NXP Semiconductors does not give any representations or

warranties, expressed or implied, as to the accuracy or completeness of such

information and shall have no liability for the consequences of use of such

information.

No offer to sell or license — Nothing in this document may be interpreted

or construed as an offer to sell products that is open for acceptance or the

grant, conveyance or implication of any license under any copyrights, patents

or other industrial or intellectual property rights.

Right to make changes — NXP Semiconductors reserves the right to make

changes to information published in this document, including without

limitation speciﬁcations and product descriptions, at any time and without

notice. This document supersedes and replaces all information supplied prior

to the publication hereof.

19.4 Trademarks

Notice: All referenced brands, product names, service names and trademarks

are the property of their respective owners.

Suitability for use — NXP Semiconductors products are not designed,

authorized or warranted to be suitable for use in medical, military, aircraft,

space or life support equipment, nor in applications where failure or

malfunction of an NXP Semiconductors product can reasonably be expected

I²C-bus — logo is a trademark of NXP B.V.

20. Contact information

For more information, please visit: http://www.nxp.com

For sales ofﬁce addresses, please send an email to: salesaddresses@nxp.com

PCA9553_6

Product data sheet

Rev. 06 — 29 December 2008

25 of 26

PCA9553

NXP Semiconductors

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

21. Contents

1

2

3

4

5

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

19.1

19.2

19.3

19.4

Data sheet status . . . . . . . . . . . . . . . . . . . . . . 25

Deﬁnitions . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Disclaimers. . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Trademarks . . . . . . . . . . . . . . . . . . . . . . . . . . 25

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

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

Marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 3

20

21

Contact information . . . . . . . . . . . . . . . . . . . . 25

Contents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

6

6.1

6.2

Pinning information. . . . . . . . . . . . . . . . . . . . . . 4

Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

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

7

7.1

7.2

7.3

7.3.1

7.3.2

7.3.3

7.3.4

7.3.5

7.3.6

7.4

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

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

Control register . . . . . . . . . . . . . . . . . . . . . . . . . 5

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

INPUT - Input register. . . . . . . . . . . . . . . . . . . . 6

PSC0 - Frequency Prescaler 0 . . . . . . . . . . . . . 6

PWM0 - Pulse Width Modulation 0. . . . . . . . . . 6

PSC1 - Frequency Prescaler 1 . . . . . . . . . . . . . 7

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

LS0 - LED selector register. . . . . . . . . . . . . . . . 7

Pins used as general purpose I/Os . . . . . . . . . 8

Power-on reset . . . . . . . . . . . . . . . . . . . . . . . . . 8

7.5

8

Characteristics of the I²C-bus. . . . . . . . . . . . . . 8

Bit transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

START and STOP conditions . . . . . . . . . . . . . . 8

System conﬁguration . . . . . . . . . . . . . . . . . . . . 9

Acknowledge . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Bus transactions . . . . . . . . . . . . . . . . . . . . . . . 10

8.1

8.1.1

8.2

8.3

8.4

9

9.1

Application design-in information . . . . . . . . . 11

Minimizing I_DDwhen the I/Os are used to

control LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Programming example . . . . . . . . . . . . . . . . . . 12

9.2

10

11

12

13

14

15

Limiting values. . . . . . . . . . . . . . . . . . . . . . . . . 13

Static characteristics. . . . . . . . . . . . . . . . . . . . 14

Dynamic characteristics . . . . . . . . . . . . . . . . . 16

Test information. . . . . . . . . . . . . . . . . . . . . . . . 17

Package outline . . . . . . . . . . . . . . . . . . . . . . . . 18

Handling information. . . . . . . . . . . . . . . . . . . . 21

16

Soldering of SMD packages . . . . . . . . . . . . . . 21

Introduction to soldering . . . . . . . . . . . . . . . . . 21

Wave and reﬂow soldering . . . . . . . . . . . . . . . 21

Wave soldering . . . . . . . . . . . . . . . . . . . . . . . . 21

Reﬂow soldering . . . . . . . . . . . . . . . . . . . . . . . 22

16.1

16.2

16.3

16.4

17

18

19

Abbreviations. . . . . . . . . . . . . . . . . . . . . . . . . . 23

Revision history. . . . . . . . . . . . . . . . . . . . . . . . 24

Legal information. . . . . . . . . . . . . . . . . . . . . . . 25

Please be aware that important notices concerning this document and the product(s)

described herein, have been included in section ‘Legal information’.

For more information, please visit: http://www.nxp.com

For sales office addresses, please send an email to: salesaddresses@nxp.com

Date of release: 29 December 2008

Document identifier: PCA9553_6


型号：	935286881118
厂家：	NXP
描述：	LED DISPLAY DRIVER, PDSO8, 3 X 3 MM, 0.85 MM HEIGHT, PLASTIC, MO-229, SOT-908-1, HVSON-8 驱动光电二极管
文件：	总26页 (文件大小：146K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

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