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DB,DBQ,DGV,DW,ORPWPACKAGE

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DESCRIPTION/ORDERING INFORMATION

PCA9534

WITH INTERRUPT OUTPUT AND CONFIGURATION REGISTERS

SCPS124B – SEPTEMBER 2006 – REVISED FEBRUARY 2007

• Low Standby Current Consumption of

• Power-Up With All Channels Configured as

1

µA Max

Inputs

• No Glitch on Power-Up

• Open-Drain Active-Low Interrupt Output

• Noise Filter on SCL/SDA Inputs

• Operating Power-Supply Voltage Range of

• Latched Outputs With High-Current Drive

2.3 V to 5.5 V

Maximum Capability for Directly Driving LEDs

• 5-V Tolerant I/O Ports

• Latch-Up Performance Exceeds 100 mA Per

JESD 78, Class II

• ESD Protection Exceeds JESD 22

• Three Hardware Address Pins Allow up to

–

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

• Input/Output Configuration Register

–

200-V Machine Model (A115-A)

• Polarity Inversion Register

–

1000-V Charged-Device Model (C101)

• Internal Power-On Reset

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

The PCA9534 consists of one 8-bit Configuration (input or output selection), Input Port, Output Port, and Polarity

Inversion (active high or active low) register. At power on, the I/Os are configured as inputs. However, 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 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 PCA9534 in the event of a timeout or other improper operation by utilizing the

machine.

The PCA9534 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 device's outputs (latched) have high-current drive capability for directly driving LEDs. It has low current

consumption.

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.

UNLESS

OTHERWISE

NOTED

this

document

contains

Copyright © 2006–2007, Texas Instruments Incorporated

PRODUCTION DATA information current as of publication date.

Products conform to specifications per the terms of Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.