PCA9535_技术文档

PCA9535

REMOTE 16-BIT I²C AND SMBus, LOW-POWER I/O EXPANDER

WITH INTERRUPT OUTPUT AND CONFIGURATION REGISTERS

www.ti.com

SCPS129E–AUGUST 2005–REVISED FEBRUARY 2007

FEATURES

•

Low Standby-Current Consumption of

1 µA Max

I²C to Parallel Port Expander

Open-Drain Active-Low Interrupt Output

5-V Tolerant I/O Ports

•

Polarity Inversion Register

Latched Outputs With High-Current Drive

Capability for Directly Driving LEDs

•

Latch-Up Performance Exceeds 100 mA Per

JESD 78, Class II

ESD Protection Exceeds JESD 22

Compatible With Most Microcontrollers

400-kHz Fast I²C Bus

–

2000-V Human-Body Model (A114-A)

1000-V Charged-Device Model (C101)

Address by Three Hardware Address Pins for

Use of up to Eight Devices

DB, DBQ, DGV, DW, OR PW PACKAGE

(TOP VIEW)

RGE PACKAGE

(TOP VIEW)

1

24

23

22

21

20

19

18

17

16

15

14

13

INT

A1

V

CC

2

SDA

SCL

A0

24 23 22 21 20 19

3

A2

P00

P01

P02

P03

P04

P05

1

2

3

4

5

6

18

17

16

15

14

13

A0

4

P00

P01

P02

P03

P04

P05

P06

P07

GND

P17

P16

P15

P14

P13

5

P17

P16

P15

P14

P13

P12

P11

P10

6

7

8

9

7

8 9 10 11 12

10

11

12

DESCRIPTION/ORDERING INFORMATION

ORDERING INFORMATION

T_A

PACKAGE⁽¹⁾

ORDERABLE PART NUMBER

PCA9535DBR

TOP-SIDE MARKING

Reel of 2000

SSOP – DB

PD9535

Tube of 60

PCA9535DB

QSOP – DBQ

TVSOP – DGV

Reel of 2500

Reel of 2000

Tube of 25

PCA9535DBQR

PCA9535DGVR

PCA9535DW

PCA9535DWR

PCA9535PW

PCA9535

PD9535

–40°C to 85°C

SOIC – DW

PCA9535

Reel of 2000

Tube of 60

TSSOP – PW

QFN – RGE

PD9535

Reel of 2000

Reel of 3000

PCA9535PWR

PCA9535RGER

(1) Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at

www.ti.com/sc/package.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

PCA9535

REMOTE 16-BIT I²C AND SMBus, LOW-POWER I/O EXPANDER

WITH INTERRUPT OUTPUT AND CONFIGURATION REGISTERS

www.ti.com

SCPS129E–AUGUST 2005–REVISED FEBRUARY 2007

DESCRIPTION/ORDERING INFORMATION (CONTINUED)

This 16-bit I/O expander for the two-line bidirectional bus (I²C) is designed for 2.3-V to 5.5-V V_CCoperation. It

provides general-purpose remote I/O expansion for most microcontroller families via the I²C interface [serial

clock (SCL), serial data (SDA)].

The PCA9535 consists of two 8-bit Configuration (input or output selection), Input Port, Output Port, and Polarity

Inversion (active-high or active-low operation) registers. At power on, the I/Os are configured as inputs. The

system master can enable the I/Os as either inputs or outputs by writing to the I/O configuration bits. The data

for each input or output is kept in the corresponding Input or Output Port register. The polarity of the Input Port

register can be inverted with the Polarity Inversion register. All registers can be read by the system master.

The system master can reset the PCA9535 in the event of a timeout or other improper operation by utilizing the

power-on reset feature, which puts the registers in their default state and initializes the I²C/SMBus state

machine.

The PCA9535 open-drain interrupt (INT) output is activated when any input state differs from its corresponding

Input Port register state and is used to indicate to the system master that an input state has changed.

INT can be connected to the interrupt input of a microcontroller. By sending an interrupt signal on this line, the

remote I/O can inform the microcontroller if there is incoming data on its ports without having to communicate via

the I²C bus. Thus, the PCA9535 can remain a simple slave device.

The device outputs (latched) have high-current drive capability for directly driving LEDs. The device has low

current consumption.

Although pin-to-pin and I²C address compatible with the PCF8575, software changes are required due to the

enhancements.

The PCA9535 is identical to the PCA9555, except for the removal of the internal I/O pullup resistor, which

greatly reduces power consumption when the I/Os are held low.

Three hardware pins (A0, A1, and A2) are used to program and vary the fixed I²C address and allow up to eight

devices to share the same I²C bus or SMBus. The fixed I²C address of the PCA9535 is the same as the

PCA9555, PCF8575, PCF8575C, and PCF8574, allowing up to eight of these devices in any combination to

share the same I²C bus or SMBus.

2

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PCA9535

REMOTE 16-BIT I²C AND SMBus, LOW-POWER I/O EXPANDER

WITH INTERRUPT OUTPUT AND CONFIGURATION REGISTERS

www.ti.com

SCPS129E–AUGUST 2005–REVISED FEBRUARY 2007

TERMINAL FUNCTIONS

NO.

SOIC (D),

SSOP (DB),

NAME

DESCRIPTION

QSOP (DBQ),

TSSOP (PW), AND

TVSOP (DGV)

QFN (RGE)

1

22

23

24

1

INT

A1

Interrupt output. Connect to V_CCthrough a pullup resistor.

Address input. Connect directly to V_CCor ground.

P-port input/output. Push-pull design structure.

Ground

2

3

A2

4

P00

P01

P02

P03

P04

P05

P06

P07

GND

P10

P11

P12

P13

P14

P15

P16

P17

A0

5

2

6

3

7

4

8

5

9

6

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

P-port input/output. Push-pull design structure.

Address input. Connect directly to V_CCor ground.

Serial clock bus. Connect to V_CCthrough a pullup resistor.

Serial data bus. Connect to V_CCthrough a pullup resistor.

Supply voltage

SCL

SDA

V_CC

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PCA9535

REMOTE 16-BIT I²C AND SMBus, LOW-POWER I/O EXPANDER

WITH INTERRUPT OUTPUT AND CONFIGURATION REGISTERS

www.ti.com

SCPS129E–AUGUST 2005–REVISED FEBRUARY 2007

LOGIC DIAGRAM (POSITIVE LOGIC)

PCA9535

1

Interrupt

Logic

LP Filter

INT

21

2

A0

A1

A2

P07−P00

P17−P10

3

22

23

SCL

SDA

2

Input

Filter

I C Bus

Shift

Register

I/O

Port

16 Bits

Control

Write Pulse

Read Pulse

24

12

V

Power-On

Reset

CC

GND

A. Pin numbers shown are for DB, DBQ, DGV, DW, and PW packages.

B. All I/Os are set to inputs at reset.

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PCA9535

REMOTE 16-BIT I²C AND SMBus, LOW-POWER I/O EXPANDER

WITH INTERRUPT OUTPUT AND CONFIGURATION REGISTERS

www.ti.com

SCPS129E–AUGUST 2005–REVISED FEBRUARY 2007

SIMPLIFIED SCHEMATIC OF P-PORT I/Os⁽¹⁾

Data From

Output Port

Shift Register

Register Data

Configuration

Register

V

CC

Q1

Data From

Shift Register

D

Q

FF

CLK

D

Q

Write Configuration

Pulse

Q

FF

CLK

I/O Pin

GND

Write Pulse

Output Port

Register

Q2

Input Port

Register

D

Q

Input Port

Register Data

FF

CLK

Read Pulse

Q

To INT

Data From

Shift Register

Polarity

Register Data

D

Q

FF

CLK

Write Polarity

Pulse

Polarity Inversion

Register

(1) At power-on reset, all registers return to default values.

I/O Port

When an I/O is configured as an input, FETs Q1 and Q2 are off, which creates a high-impedance input. The

input voltage may be raised above V_CCto a maximum of 5.5 V.

If the I/O is configured as an output, Q1 or Q2 is enabled, depending on the state of the Output Port register. In

this case, there are low-impedance paths between the I/O pin and either V_CCor GND. The external voltage

applied to this I/O pin should not exceed the recommended levels for proper operation.

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PCA9535

REMOTE 16-BIT I²C AND SMBus, LOW-POWER I/O EXPANDER

WITH INTERRUPT OUTPUT AND CONFIGURATION REGISTERS

www.ti.com

SCPS129E–AUGUST 2005–REVISED FEBRUARY 2007

I²C Interface

The bidirectional I²C bus consists of the serial clock (SCL) and serial data (SDA) lines. Both lines must be

connected to a positive supply via a pullup resistor when connected to the output stages of a device. Data

transfer may be initiated only when the bus is not busy.

I²C communication with this device is initiated by a master sending a Start condition, a high-to-low transition on

the SDA input/output while the SCL input is high (see Figure 1). After the Start condition, the device address

byte is sent, MSB first, including the data direction bit (R/W). This device does not respond to the general call

address.

After receiving the valid address byte, this device responds with an ACK, a low on the SDA input/output during

the high of the ACK-related clock pulse. The address inputs (A0–A2) of the slave device must not be changed

between the Start and Stop conditions.

On the I²C bus, only one data bit is transferred during each clock pulse. The data on the SDA line must remain

stable during the high pulse of the clock period, as changes in the data line at this time are interpreted as control

commands (Start or Stop) (see Figure 2).

A Stop condition, a low-to-high transition on the SDA input/output while the SCL input is high, is sent by the

master (see Figure 1).

Any number of data bytes can be transferred from the transmitter to the receiver between the Start and the Stop

conditions. Each byte of eight bits is followed by one ACK bit. The transmitter must release the SDA line before

the receiver can send an ACK bit. The device that acknowledges must pull down the SDA line during the ACK

clock pulse so that the SDA line is stable low during the high pulse of the ACK-related clock period (see

Figure 3). When a slave receiver is addressed, it must generate an ACK after each byte is received. Similarly,

the master must generate an ACK after each byte that it receives from the slave transmitter. Setup and hold

times must be met to ensure proper operation.

A master receiver signals an end of data to the slave transmitter by not generating an acknowledge (NACK)

after the last byte has been clocked out of the slave. This is done by the master receiver by holding the SDA line

high. In this event, the transmitter must release the data line to enable the master to generate a Stop condition.

SDA

SCL

S

P

Start Condition

Stop Condition

Figure 1. Definition of Start and Stop Conditions

SDA

SCL

Data Line

Stable;

Data Valid

Change

of Data

Allowed

Figure 2. Bit Transfer

6

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PCA9535

REMOTE 16-BIT I²C AND SMBus, LOW-POWER I/O EXPANDER

WITH INTERRUPT OUTPUT AND CONFIGURATION REGISTERS

www.ti.com

SCPS129E–AUGUST 2005–REVISED FEBRUARY 2007

Data Output

by Transmitter

NACK

Data Output

by Receiver

ACK

SCL From

Master

1

2

8

9

S

Start

Clock Pulse for

Condition

Acknowledgment

Figure 3. Acknowledgment on I²C Bus

Interface Definition

BIT

BYTE

7 (MSB)

6

5

4

3

2

1

0 (LSB)

I²C slave address

P0x I/O data bus

P1x I/O data bus

L

H

L

A2

A1

A0

R/W

P00

P10

P07

P17

P06

P16

P05

P15

P04

P14

P03

P13

P02

P12

P01

P11

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PCA9535

REMOTE 16-BIT I²C AND SMBus, LOW-POWER I/O EXPANDER

WITH INTERRUPT OUTPUT AND CONFIGURATION REGISTERS

www.ti.com

SCPS129E–AUGUST 2005–REVISED FEBRUARY 2007

Device Address

Figure 4 shows the address byte of the PCA9535.

R/W

Slave Address

A2 A1 A0

0

1

0

Fixed

Programmable

Figure 4. PCA9535 Address

Address Reference

INPUTS

I²C BUS SLAVE ADDRESS

A2

L

A1

L

A0

L

32 (decimal), 20 (hexadecimal)

33 (decimal), 21 (hexadecimal)

34 (decimal), 22 (hexadecimal)

35 (decimal), 23 (hexadecimal)

36 (decimal), 24 (hexadecimal)

37 (decimal), 25 (hexadecimal)

38 (decimal), 26 (hexadecimal)

39 (decimal), 27 (hexadecimal)

L

H

L

H

L

H

L

H

L

H

L

H

The last bit of the slave address defines the operation (read or write) to be performed. A high (1) selects a read

operation, while a low (0) selects a write operation.

Control Register and Command Byte

Following the successful acknowledgment of the address byte, the bus master sends a command byte that is

stored in the control register in the PCA9535. Three bits of this data byte state the operation (read or write) and

the internal register (input, output, polarity inversion or configuration) that will be affected. This register can be

written or read through the I²C bus. The command byte is sent only during a write transmission.

Once a command byte has been sent, the register that was addressed continues to be accessed by reads until

a new command byte has been sent.

0

B2 B1 B0

Figure 5. Control Register Bits

Control Register

CONTROL REGISTER BITS

COMMAND

BYTE (HEX)

POWER-UP

DEFAULT

REGISTER

PROTOCOL

B2

B1

0

B0

0

1

0

1

0

1

0

1

0

1

0x00

0x01

0x02

0x03

0x04

0x05

0x06

0x07

Input Port 0

Input Port 1

Read byte

xxxx xxxx

1111 1111

0000 0000

1111 1111

0

Read byte

1

Output Port 0

Read/write byte

1

Output Port 1

0

Polarity Inversion Port 0

Polarity Inversion Port 1

Configuration Port 0

Configuration Port 1

0

1

8

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PCA9535

REMOTE 16-BIT I²C AND SMBus, LOW-POWER I/O EXPANDER

WITH INTERRUPT OUTPUT AND CONFIGURATION REGISTERS

www.ti.com

SCPS129E–AUGUST 2005–REVISED FEBRUARY 2007

Register Descriptions

The Input Port registers (registers 0 and 1) reflect the incoming logic levels of the pins, regardless of whether the

pin is defined as an input or an output by the Configuration Register. It only acts on read operation. Writes to

these registers have no effect. The default value, X, is determined by the externally applied logic level.

Before a read operation, a write transmission is sent with the command byte to let the I²C device know that the

Input Port registers will be accessed next.

Registers 0 and 1 (Input Port Registers)

Bit

I0.7

X

I0.6

X

I0.5

X

I0.4

X

I0.3

X

I0.2

X

I0.1

X

I0.0

X

Default

Bit

I1.7

X

I1.6

X

I1.5

X

I1.4

X

I1.3

X

I1.2

X

I1.1

X

I1.0

X

Default

The Output Port registers (registers 2 and 3) show the outgoing logic levels of the pins defined as outputs by the

Configuration register. Bit values in this register have no effect on pins defined as inputs. In turn, reads from this

register reflect the value that is in the flip-flop controlling the output selection, not the actual pin value.

Registers 2 and 3 (Output Port Registers)

Bit

O0.7

1

O0.6

1

O0.5

1

O0.4

1

O0.3

1

O0.2

1

O0.1

1

O0.0

1

Default

Bit

O1.7

1

O1.6

1

O1.5

1

O1.4

1

O1.3

1

O1.2

1

O1.1

1

O1.0

1

Default

The Polarity Inversion registers (registers 4 and 5) allow polarity inversion of pins defined as inputs by the

Configuration register. If a bit in this register is set (written with 1), the corresponding pin's polarity is inverted. If

a bit in this register is cleared (written with a 0), the corresponding pin's original polarity is retained.

Registers 4 and 5 (Polarity Inversion Registers)

Bit

N0.7

0

N0.6

0

N0.5

0

N0.4

0

N0.3

0

N0.2

0

N0.1

0

N0.0

0

Default

Bit

N1.7

0

N1.6

0

N1.5

0

N1.4

0

N1.3

0

N1.2

0

N1.1

0

N1.0

0

Default

The Configuration registers (registers 6 and 7) configure the directions of the I/O pins. If a bit in this register is

set to 1, the corresponding port pin is enabled as an input with a high-impedance output driver. If a bit in this

register is cleared to 0, the corresponding port pin is enabled as an output.

Registers 6 and 7 (Configuration Registers)

Bit

C0.7

1

C0.6

1

C0.5

1

C0.4

1

C0.3

1

C0.2

1

C0.1

1

C0.0

1

Default

Bit

C1.7

1

C1.6

1

C1.5

1

C1.4

1

C1.3

1

C1.2

1

C1.1

1

C1.0

1

Default

Power-On Reset

When power (from 0 V) is applied to V_CC, an internal power-on reset holds the PCA9535 in a reset condition

until V_CChas reached V_POR. At that point, the reset condition is released, and the PCA9535 registers and

I²C/SMBus state machine initialize to their default states. After that, V_CCmust be lowered to below 0.2 V and

then back up to the operating voltage for a power-reset cycle.

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PCA9535

REMOTE 16-BIT I²C AND SMBus, LOW-POWER I/O EXPANDER

WITH INTERRUPT OUTPUT AND CONFIGURATION REGISTERS

www.ti.com

SCPS129E–AUGUST 2005–REVISED FEBRUARY 2007

Interrupt (INT) Output

An interrupt is generated by any rising or falling edge of the port inputs in the input mode. After time, t_iv, the

signal INT is valid. Resetting the interrupt circuit is achieved when data on the port is changed to the original

setting or data is read from the port that generated the interrupt or in a Stop event. Resetting occurs in the read

mode at the acknowledge (ACK) bit or not acknowledge (NACK) bit after the falling edge of the SCL signal. In a

Stop event, INT is cleared after the rising edge of SDA. Interrupts that occur during the ACK or NACK clock

pulse can be lost (or be very short) due to the resetting of the interrupt during this pulse. Each change of the

I/Os after resetting is detected and is transmitted as INT.

Reading from or writing to another device does not affect the interrupt circuit, and a pin configured as an output

cannot cause an interrupt. Changing an I/O from an output to an input may cause a false interrupt to occur, if the

state of the pin does not match the contents of the Input Port register. Because each 8-bit port is read

independently, the interrupt caused by port 0 is not cleared by a read of port 1, or vice versa.

INT has an open-drain structure and requires a pullup resistor to V_CC

.

Bus Transactions

Data is exchanged between the master and the PCA9535 through write and read commands.

Writes

Data is transmitted to the PCA9535 by sending the device address and setting the least-significant bit to a logic

0 (see Figure 4 for device address). The command byte is sent after the address and determines which register

receives the data that follows the command byte.

The eight registers within the PCA9535 are configured to operate as four register pairs. The four pairs are Input

Ports, Output Ports, Polarity Inversions, and Configurations. After sending data to one register, the next data

byte is sent to the other register in the pair (see Figure 6 and Figure 7). For example, if the first byte is sent to

Output Port 1 (register 3), the next byte is stored in Output Port 0 (register 2).

There is no limitation on the number of data bytes sent in one write transmission. In this way, each 8-bit register

may be updated independently of the other registers.

SCL

SDA

1

2

3

4

5

6

7

8

9

Command Byte

Data to Port 0

Data 0

Data to Port 1

Data 1

Slave Address

A

P

1.0

S

0

1

0

A2 A1 A0

0

A

0

1

0

A

1.7

0.7

0.0

Acknowledge

From Slave

Acknowledge

From Slave

Acknowledge

From Slave

R/W

Start Condition

Write to Port

Data Out from Port 0

t

pv

Data Out from Port 1

Data Valid

t

pv

Figure 6. Write to Output Port Registers

<br/>

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SCPS129E–AUGUST 2005–REVISED FEBRUARY 2007

1

2

3

4

5

6

7

8

9

1

0

2

0

3

4

5

6

7

8

9

1

2

3

4

5

6

7

8

9

1

2

3

4

5

SCL

SDA

Slave Address

Command Byte

Data to Register

Data 0

Data to Register

Data1

MSB

LSB

MSB

LSB

S

0

1

0

A2 A1 A0

0

A

0

1

0

A

P

Acknowledge

From Slave

Acknowledge

From Slave

R/W

Acknowledge

From Slave

Start Condition

Figure 7. Write to Configuration Registers

Reads

The bus master first must send the PCA9535 address with the least-significant bit set to a logic 0 (see Figure 4

for device address). The command byte is sent after the address and determines which register is accessed.

After a restart, the device address is sent again, but this time, the least-significant bit is set to a logic 1. Data

from the register defined by the command byte then is sent by the PCA9535 (see Figure 8 through Figure 10).

After a restart, the value of the register defined by the command byte matches the register being accessed when

the restart occurred. For example, if the command byte references Input Port 1 before the restart, and the restart

occurs when Input Port 0 is being read, the stored command byte changes to reference Input Port 0. The

original command byte is forgotten. If a subsequent restart occurs, Input Port 0 is read first. Data is clocked into

the register on the rising edge of the ACK clock pulse. After the first byte is read, additional bytes may be read,

but the data now reflect the information in the other register in the pair. For example, if Input Port 1 is read, the

next byte read is Input Port 0.

Data is clocked into the register on the rising edge of the ACK clock pulse. There is no limitation on the number

of data bytes received in one read transmission, but when the final byte is received, the bus master must not

acknowledge the data

Data From Lower

or Upper Byte

Slave Address

of Register

Acknowledge

From Slave

Acknowledge

From Slave

Acknowledge

From Slave

Acknowledge

From Master

S

0

1

0

A2 A1 A0

0

A

Data

Command Byte

A

S

0

1

0

A2 A1 A0

1

A

MSB

LSB

A

First Byte

R/W

At this moment, master

transmitter becomes master

receiver, and slave receiver

becomes slave transmitter.

Data From Upper

or Lower Byte

of Register

No Acknowledge

From Master

MSB

LSB NA

P

Data

Last Byte

Figure 8. Read From Register

<br/>

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SCPS129E–AUGUST 2005–REVISED FEBRUARY 2007

1

2

3

4

5

6

7

8

9

SCL

SDA

I0.x

I1.x

I0.x

I1.x

3

S

0

1

0

A2 A1 A0

1

A

7

6

5

4

3

2

1

0

A

7

6

5

4

3

2

1

0

A

7

6

5

4

3

2

1

0

A

7

6

5

4

2

1

0

1

P

Acknowledge

From Master

R/W

Acknowledge

From Master

Acknowledge

From Master

Acknowledge

From Slave

No Acknowledge

From Master

Read From Port 0

Data Into Port 0

Read From Port 1

Data Into Port 1

INT

t

ir

iv

A. Transfer of data can be stopped at any time by a Stop condition. When this occurs, data present at the latest

acknowledge phase is valid (output mode). It is assumed that the command byte previously has been set to 00 (read

Input Port register).

B. This figure eliminates the command byte transfer, a restart, and slave address call between the initial slave address

call and actual data transfer from P port (see Figure 8 for these details).

Figure 9. Read Input Port Register, Scenario 1

<br/>

1

2

3

4

5

6

7

8

9

SCL

I0.x

I1.x

I0.x

I1.x

S

0

1

0

A2 A1 A0

1

A

00

A

10

A

03

A

1

P

SDA

12

Acknowledge

From Slave

Acknowledge

From Master

Acknowledge

From Master

Acknowledge

From Master

No Acknowledge

From Master

R/W

t

ph

t

ps

Read From Port 0

Data Into Port 0

Data 00

Data 01

Data 02

Data 03

t

ps

t

ph

Read From Port 1

11

12

Data

Data 10

Data

Data Into Port 1

INT

t

iv

t

ir

A. Transfer of data can be stopped at any time by a Stop condition. When this occurs, data present at the latest

acknowledge phase is valid (output mode). It is assumed that the command byte previously has been set to 00 (read

Input Port register).

B. This figure eliminates the command byte transfer, a restart, and slave address call between the initial slave address

call and actual data transfer from P port (see Figure 8 for these details).

Figure 10. Read Input Port Register, Scenario 2

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Absolute Maximum Ratings⁽¹⁾

over operating free-air temperature range (unless otherwise noted)

MIN

–0.5

MAX

6

UNIT

V

V_CC

V_I

Supply voltage range

Input voltage range⁽²⁾

Output voltage range⁽²⁾

6

V

V_O

I_IK

6

V

Input clamp current

V_I< 0

–20

±20

50

mA

I_OK

I_IOK

I_OL

I_OH

Output clamp current

V_O< 0

Input/output clamp current

Continuous output low current

Continuous output high current

Continuous current through GND

Continuous current through V_CC

V_O< 0 or V_O> V_CC

V_O= 0 to V_CC

–50

–250

160

63

I_CC

mA

DB package

DBQ package

DGV package

DW package

PW package

RGE package

61

86

θ_JA

Package thermal impedance, junction to free air⁽³⁾

°C/W

46

88

45

θ_JP

Package thermal impedance, junction to pad

Storage temperature range

1.5

150

°C/W

°C

T_stg

–65

(1) Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings

only, and functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating

Conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

(2) The input negative-voltage and output voltage ratings may be exceeded if the input and output current ratings are observed.

(3) The package thermal impedance is calculated in accordance with JESD 51-7.

Recommended Operating Conditions

MIN

2.3

MAX

5.5

UNIT

V_CC

V_IH

Supply voltage

V

SCL, SDA

0.7 × V_CC

–0.5

5.5

High-level input voltage

V

A2–A0, P07–P00, P17–P10

SCL, SDA

5.5

0.3 × V_CC

–10

V_IL

Low-level input voltage

A2–A0, P07–P00, P17–P10

P07–P00, P17–P10

–0.5

I_OH

I_OL

T_A

High-level output current

Low-level output current

Operating free-air temperature

mA

°C

25

–40

85

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Electrical Characteristics

over recommended operating free-air temperature range (unless otherwise noted)

PARAMETER

TEST CONDITIONS

I_I= –18 mA

V_CC

2.3 V to 5.5 V

V_POR

MIN TYP⁽¹⁾

MAX UNIT

V_IK

Input diode clamp voltage

Power-on reset voltage

–1.2

1.5

1.8

2.6

4.1

1.7

2.5

4

V

V_POR

V_I= V_CCor GND, I_O= 0

1.65

V

2.3 V

I_OH= –8 mA

3 V

4.75 V

V_OH

P-port high-level output voltage⁽²⁾

V

2.3 V

I_OH= –10 mA

3 V

4.75 V

SDA

V_OL= 0.4 V

V_OL= 0.5 V

V_OL= 0.7 V

V_OL= 0.4 V

2.3 V to 5.5 V

3

8

10

3

20

24

I_OL

P port⁽³⁾

mA

INT

SCL, SDA

A2–A0

P port

±1

1

I_I

V_I= V_CCor GND

2.3 V to 5.5 V

µA

I_IH

I_IL

V_I= V_CC

2.3 V to 5.5 V

5.5 V

µA

V_I= GND

–1

200

75

50

1

100

30

V_I= V_CCor GND, I_O= 0,

I/O = inputs, f_SCL= 400 kHz

Operating mode

3.6 V

2.7 V

20

I_CC

µA

5.5 V

0.5

0.4

0.25

V_I= GND, I_O= 0, I/O = inputs,

f_SCL= 0 kHz

Standby mode

3.6 V

0.9

0.8

2.7 V

One input at V_CC– 0.6 V,

Other inputs at V_CCor GND

∆I_CC

Additional current in standby mode

2.3 V to 5.5 V

200

µA

C_I

SCL

V_I= V_CCor GND

3

7

pF

SDA

P port

C_io

V_IO= V_CCor GND

2.3 V to 5.5 V

pF

3.7

9.5

(1) All typical values are at nominal supply voltage (2.5-V, 3.3-V, or 5-V V_CC) and T_A= 25°C.

(2) Each I/O must be limited externally to a maximum of 25 mA, and each octal (P07–P00 and P17–P10) must be limited to a maximum

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

(3) The total current sourced by all I/Os must be limited to 160 mA (80 mA for P07–P00 and 80 mA for P17–P10).

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I²C Interface Timing Requirements

over recommended operating free-air temperature range (unless otherwise noted) (see Figure 11)

MIN

0

MAX

UNIT

kHz

µs

f_scl

I²C clock frequency

I²C clock high time

I²C clock low time

400

t_sch

t_scl

0.6

1.3

µs

t_sp

I²C spike time

50

ns

t_sds

t_sdh

t_icr

I²C serial-data setup time

I²C serial-data hold time

I²C input rise time

I²C input fall time

I²C output fall time

100

ns

0

ns

(1)

20 + 0.1C_b

300

ns

(1)

t_icf

20 + 0.1C_b

ns

t_ocf

10-pF to 400-pF bus

ns

t_buf

I²C bus free time between Stop and Start

I²C Start or repeated Start condition setup

I²C Start or repeated Start condition hold

I²C Stop condition setup

Valid-data time

1.3

0.6

50

µs

t_sts

µs

t_sth

µs

t_sps

t_vd(Data)

t_vd(ack)

C_b

µs

SCL low to SDA output valid

ns

Valid-data time of ACK condition

I²C bus capacitive load

ACK signal from SCL low to SDA (out) low

0.1

0.9

µs

400

pF

(1) C_b= total capacitance of one bus line in pF

Switching Characteristics

over recommended operating free-air temperature range, C_L≤ 100 pF (unless otherwise noted) (see Figure 12 and

Figure 13)

FROM

(INPUT)

TO

(OUTPUT)

PARAMETER

MIN

MAX UNIT

t_iv

Interrupt valid time

Interrupt reset delay time

Output data valid

P port

SCL

INT

4

µs

ns

µs

t_ir

t_pv

t_ps

t_ph

SCL

P port

SCL

200

Input data setup time

Input data hold time

P port

150

1

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TYPICAL CHARACTERISTICS

T_A= 25°C (unless otherwise noted)

SUPPLY CURRENT

vs

TEMPERATURE

STANDBY SUPPLY CURRENT

SUPPLY CURRENT

vs

TEMPERATURE

SUPPLY VOLTAGE

55

50

45

40

35

30

25

20

15

10

5

70

60

50

40

30

20

10

0

30

25

20

15

10

5

SCL = V_CC

f_SCL= 400 kHz

I/Os Unloaded

V_CC= 5 V

f_SCL= 400 kHz

I/Os Unloaded

V_CC= 5 V

V_CC= 3.3 V

V_CC= 2.5 V

0

-50

-25

0

25

50

75

100

2.3

2.7

3.1

3.5

3.9

4.3

4.7

5.1

5.5

-50

-25

0

25

50

75

100

T_A– Free-Air Temperature – °C

V_CC– Supply Voltage – V

T_A– Free-Air Temperature – °C

I/O SINK CURRENT

vs

OUTPUT LOW VOLTAGE

I/O SINK CURRENT

vs

OUTPUT LOW VOLTAGE

I/O SINK CURRENT

vs

OUTPUT LOW VOLTAGE

30

25

20

15

10

5

50

45

40

35

30

25

20

15

10

5

40

35

30

25

20

15

10

5

V_CC= 5 V

V_CC= 3.3 V

V_CC= 2.5 V

T_A= –40°C

T_A= 25°C

T_A= 125°C

0

0.0

0.1

0.2

0.3

0.4

0.5

0.6

0.0

0.1

0.2

0.3

0.4

0.5

0.6

0.0

0.1

0.2

0.3

0.4

0.5

0.6

V_OL– Output Low Voltage – V

V

_OL– Output Low Voltage – V

V_OL– Output Low Voltage – V

I/O OUTPUT LOW VOLTAGE

I/O SOURCE CURRENT

vs

OUTPUT HIGH VOLTAGE

I/O SOURCE CURRENT

vs

OUTPUT HIGH VOLTAGE

vs

TEMPERATURE

300

275

250

225

200

175

150

125

100

75

35

30

25

20

15

10

5

50

45

40

35

30

25

20

15

10

5

V_CC= 2.5 V, I_SINK= 10 mA

V_CC= 3.3 V

V_CC= 2.5 V

T_A= –40°C

T_A= 25°C

V_CC= 5 V, I_SINK= 10 mA

T_A= 125°C

V_CC= 2.5 V, I_SINK= 1 mA

V_CC= 5 V, I_SINK= 1 mA

T_A= 125°C

50

25

0

0.0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0

0.0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

-50

-25

0

25

50

75

100

(V_CC– V_OH) – V

T_A– Free-Air Temperature – °C

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TYPICAL CHARACTERISTICS (continued)

T_A= 25°C (unless otherwise noted)

I/O SOURCE CURRENT

vs

OUTPUT HIGH VOLTAGE

I/O HIGH VOLTAGE

vs

TEMPERATURE

OUTPUT HIGH VOLTAGE

vs

SUPPLY VOLTAGE

300

275

250

225

200

175

150

125

100

75

6

5

4

3

2

1

0

75

V_CC= 5 V

70

65

60

55

50

45

40

35

30

25

20

15

10

5

T_A= 25°C

V_CC= 2.5 V, I_OL= 10 mA

T_A= –40°C

I_OH= –8 mA

T_A= 25°C

V_CC= 5 V, I_OL= 10 mA

I_OH= –10 mA

T_A= 125°C

50

25

0

2.3

2.7

3.1

3.5

3.9

4.3

4.7

5.1

5.5

0.0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

-50

-25

0

25

50

75

100

V_CC– Supply Voltage – V

(V_CC– V_OH) – V

T_A– Free-Air Temperature – °C

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PARAMETER MEASUREMENT INFORMATION

V

CC

R

L

= 1 kΩ

SDA

DUT

C

L

= 50 pF

(see Note A)

SDA LOAD CONFIGURATION

Three Bytes for Complete

Device Programming

Stop

Condition Condition

(P) (S)

Start

Address

Bit 7

(MSB)

R/W

Bit 0

(LSB)

Data

Bit 7

(MSB)

Data

Bit 0 Condition

(LSB)

Stop

Address

Bit 6

Address

Bit 1

ACK

(A)

(P)

t

scl

t

sch

0.7 × V

0.3 × V

CC

SCL

SDA

CC

t

icr

t

sts

t

PHL

t

icf

t

buf

t

sp

PLH

0.7 × V

0.3 × V

CC

t

icf

t

icr

t

sdh

t

sps

t

sth

t

sds

Repeat

Start

Condition

Stop

Condition

Start or

Repeat

Start

Condition

VOLTAGE WAVEFORMS

BYTE

1

DESCRIPTION

2

I C address

2, 3

P-port data

A. C_Lincludes probe and jig capacitance.

B. All inputs are supplied by generators having the following characteristics: PRR ≤ 10 MHz, Z_O= 50 Ω, t_r/t_f≤ 30 ns.

C. All parameters and waveforms are not applicable to all devices.

Figure 11. I²C Interface Load Circuit and Voltage Waveforms

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PARAMETER MEASUREMENT INFORMATION (continued)

V

CC

R

L

= 4.7 kΩ

INT

DUT

C

L

= 100 pF

(see Note A)

INTERRUPT LOAD CONFIGURATION

ACK

From Slave

ACK

From Slave

Start

Condition

8 Bits

(One Data Byte)

From Port

R/W

Slave Address

Data From Port

Data 2

Data 1

A

1

P

S

0

1

0

A2 A1 A0

1

A

1

2

3

4

5

6

7

8

A

t

ir

B

t

ir

INT

A

t

iv

t

sps

A

Data

Into

Port

Address

Data 1

Data 2

0.7 × V

0.3 × V

CC

0.7 × V

0.3 × V

CC

SCL

INT

Pn

R/W

A

CC

t

iv

t

ir

0.7 × V

0.3 × V

0.7 × V

0.3 × V

CC

INT

CC

View A−A

A. C_Lincludes probe and jig capacitance.

View B−B

B. All inputs are supplied by generators having the following characteristics: PRR ≤ 10 MHz, Z_O= 50 Ω, t_r/t_f≤ 30 ns.

C. All parameters and waveforms are not applicable to all devices.

Figure 12. Interrupt Load Circuit and Voltage Waveforms

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PARAMETER MEASUREMENT INFORMATION (continued)

Pn

500 W

DUT

2 × V

CC

C

= 50 pF

L

500 W

(see Note A)

P-PORT LOAD CONFIGURATION

0.7 × V

CC

SCL

P0

A

P3

0.3 × V

CC

Slave

ACK

SDA

Pn

t

pv

(see Note B)

Last Stable Bit

Unstable

Data

WRITE MODE (R/W = 0)

0.7 × V

0.3 × V

CC

SCL

Pn

P0

A

P3

CC

t

ph

t

ps

0.7 × V

0.3 × V

CC

READ MODE (R/W = 1)

A. C_Lincludes probe and jig capacitance.

B. t_pvis measured from 0.7 × V_CCon SCL to 50% I/O (Pn) output.

C. All inputs are supplied by generators having the following characteristics: PRR ≤ 10 MHz, Z_O= 50 Ω, t_r/t_f≤ 30 ns.

D. The outputs are measured one at a time, with one transition per measurement.

E. All parameters and waveforms are not applicable to all devices.

Figure 13. P-Port Load Circuit and Voltage Waveforms

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PARAMETER MEASUREMENT INFORMATION (continued)

V

CC

Pn

500 W

R

L

= 1 kΩ

DUT

2 × V

CC

SDA

DUT

C

L

= 50 pF

500 W

(see Note A)

C

L

= 50 pF

(see Note A)

SDA LOAD CONFIGURATION

P-PORT LOAD CONFIGURATION

Start

SCL

ACK or Read Cycle

SDA

0.3 y V

CC

t

RESET

V /2

CC

t

REC

t

w

Pn

V /2

CC

t

RESET

A. C_Lincludes probe and jig capacitance.

B. All inputs are supplied by generators having the following characteristics: PRR ≤ 10 MHz, Z_O= 50 Ω, t_r/t_f≤ 30 ns.

C. The outputs are measured one at a time, with one transition per measurement.

D. I/Os are configured as inputs.

E. All parameters and waveforms are not applicable to all devices.

Figure 14. Reset Load Circuits and Voltage Waveforms

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APPLICATION INFORMATION

Figure 15 shows an application in which the PCA9535 can be used.

Subsystem 1

(e.g., Temperature

Sensor)

INT

V

CC

(5 V)

Subsystem 2

(e.g., Counter)

24

2 kW

100 kW

V

10 kW 10 kW

CC

V

DD

100 kW

RESET

A

22

23

4

P00

SCL

SDA

INT

SCL

5

Master

Controller

P01

P02

P03

SDA

INT

6

7

1

GND

ENABLE

8

9

P04

P05

B

PCA9535

V

CC

10

Controlled Switch

(e.g., CBT Device)

P06

11

13

14

15

16

17

18

19

20

P07

P10

P11

P12

P13

P14

P15

P16

P17

3

A2

2

ALARM

A1

A0

Keypad

Subsystem 3

(e.g., Alarm)

21

GND

12

A. Device address is configured as 0100100 for this example.

B. P00, P02, and P03 are configured as outputs.

C. P01, P04–P07, and P10–P17 are configured as inputs.

D. Pin numbers shown are for DB, DBQ, DGV, DW, and PW packages.

Figure 15. Typical Application

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APPLICATION INFORMATION (continued)

Minimizing I_CCWhen I/O Is Used to Control LED

When an I/O is used to control an LED, normally it is connected to V_CCthrough a resistor as shown in Figure 15.

Because the LED acts as a diode, when the LED is off, the I/O V_INis about 1.2 V less than V_CC. The ∆I_CC

parameter in Electrical Characteristics shows how I_CCincreases as V_INbecomes lower than V_CC. For

battery-powered applications, it is essential that the voltage of I/O pins is greater than or equal to V_CC, when the

LED is off, to minimize current consumption.

Figure 16 shows a high-value resistor in parallel with the LED. Figure 17 shows V_CCless than the LED supply

voltage by at least 1.2 V. Both of these methods maintain the I/O V_INat or above V_CCand prevent additional

supply-current consumption when the LED is off.

V

CC

LED

100 kW

V

CC

Pn

Figure 16. High-Value Resistor in Parallel With LED

3.3 V

5 V

V

CC

LED

Pn

Figure 17. Device Supplied by Lower Voltage

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THERMAL PAD MECHANICAL DATA

RGE (S-PQFP-N24)

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PACKAGE OPTION ADDENDUM

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21-Feb-2007

PACKAGING INFORMATION

Orderable Device

PCA9535DB

Status ⁽¹⁾

ACTIVE

PREVIEW

Package Package

Pins Package Eco Plan ⁽²⁾Lead/Ball Finish MSL Peak Temp ⁽³⁾

Qty

Type

Drawing

SSOP

DB

24

60 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

no Sb/Br)

PCA9535DBQR

PCA9535DBQRG4

PCA9535DBR

PCA9535DGVR

PCA9535DW

SSOP/

QSOP

DBQ

DB

2500 Green (RoHS & CU NIPDAU Level-2-260C-1YEAR

no Sb/Br)

SSOP/

QSOP

2500 Green (RoHS & CU NIPDAU Level-2-260C-1YEAR

no Sb/Br)

SSOP

TVSOP

SOIC

2000 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

no Sb/Br)

DGV

DW

PW

2000 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

no Sb/Br)

25 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

no Sb/Br)

PCA9535DWR

PCA9535PW

SOIC

2000 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

no Sb/Br)

TSSOP

QFN

60 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

no Sb/Br)

PCA9535PWE4

PCA9535PWR

PCA9535PWRE4

PCA9535RGER

PCA9535RHLR

PW

60 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

no Sb/Br)

PW

2000 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

no Sb/Br)

PW

2000 Green (RoHS & CU NIPDAU Level-1-260C-UNLIM

no Sb/Br)

RGE

RHL

3000 Green (RoHS & CU NIPDAU Level-2-260C-1YEAR

no Sb/Br)

QFN

1000

TBD

Call TI

⁽¹⁾The marketing status values are defined as follows:

ACTIVE: Product device recommended for new designs.

LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.

NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in

a new design.

PREVIEW: Device has been announced but is not in production. Samples may or may not be available.

OBSOLETE: TI has discontinued the production of the device.

(2)

Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check

http://www.ti.com/productcontent for the latest availability information and additional product content details.

TBD: The Pb-Free/Green conversion plan has not been defined.

Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements

for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered

at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.

Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and

package, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS

compatible) as defined above.

Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame

retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material)

(3)

MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder

temperature.

Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is

provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the

accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and continues to take

reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on

incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited

Addendum-Page 1

PACKAGE OPTION ADDENDUM

www.ti.com

21-Feb-2007

information may not be available for release.

In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI

to Customer on an annual basis.

Addendum-Page 2

MECHANICAL DATA

MPDS006C – FEBRUARY 1996 – REVISED AUGUST 2000

DGV (R-PDSO-G**)

PLASTIC SMALL-OUTLINE

24 PINS SHOWN

0,23

0,13

M

0,07

0,40

24

13

0,16 NOM

4,50

4,30

6,60

6,20

Gage Plane

0,25

0°–ā8°

0,75

1

12

0,50

A

Seating Plane

0,08

0,15

0,05

1,20 MAX

PINS **

14

16

20

24

38

48

56

DIM

A MAX

A MIN

3,70

3,50

3,70

3,50

5,10

4,90

5,10

4,90

7,90

7,70

9,80

9,60

11,40

11,20

4073251/E 08/00

NOTES: A. All linear dimensions are in millimeters.

B. This drawing is subject to change without notice.

C. Body dimensions do not include mold flash or protrusion, not to exceed 0,15 per side.

D. Falls within JEDEC: 24/48 Pins – MO-153

14/16/20/56 Pins – MO-194

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

MECHANICAL DATA

MSSO002E – JANUARY 1995 – REVISED DECEMBER 2001

DB (R-PDSO-G**)

PLASTIC SMALL-OUTLINE

28 PINS SHOWN

0,38

0,22

0,65

28

M

0,15

15

0,25

0,09

5,60

5,00

8,20

7,40

Gage Plane

1

14

0,25

A

0°–ā8°

0,95

0,55

Seating Plane

0,10

2,00 MAX

0,05 MIN

PINS **

14

16

20

24

28

30

38

DIM

6,50

5,90

6,50

5,90

7,50

8,50

7,90

10,50

9,90

10,50 12,90

A MAX

A MIN

6,90

9,90

12,30

4040065 /E 12/01

NOTES: A. All linear dimensions are in millimeters.

B. This drawing is subject to change without notice.

C. Body dimensions do not include mold flash or protrusion not to exceed 0,15.

D. Falls within JEDEC MO-150

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

MECHANICAL DATA

MTSS001C – JANUARY 1995 – REVISED FEBRUARY 1999

PW (R-PDSO-G**)

PLASTIC SMALL-OUTLINE PACKAGE

14 PINS SHOWN

0,30

0,19

M

0,10

0,65

14

8

0,15 NOM

4,50

4,30

6,60

6,20

Gage Plane

0,25

1

7

0°–8°

A

0,75

0,50

Seating Plane

0,10

0,15

0,05

1,20 MAX

PINS **

8

14

16

20

24

28

DIM

3,10

2,90

5,10

4,90

5,10

4,90

6,60

6,40

7,90

9,80

9,60

A MAX

A MIN

7,70

4040064/F 01/97

NOTES: A. All linear dimensions are in millimeters.

B. This drawing is subject to change without notice.

C. Body dimensions do not include mold flash or protrusion not to exceed 0,15.

D. Falls within JEDEC MO-153

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

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Post Office Box 655303 Dallas, Texas 75265


型号：	PCA9535
厂家：	TEXAS INSTRUMENTS
描述：	REMOTE 16-BIT I2C AND SMBus, LOW-POWER I/O EXPANDER WITH INTERRUPT OUTPUT AND CONFIGURATION REGISTERS 远程16位I2C和SMBus低功耗I / O扩展器，带有中断输出和配置寄存器输出元件
文件：	总35页 (文件大小：835K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

PCA9535 [TI]

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