Datasheet > PCA9537DP.118

PCA9537DP.118

更新时间： 2022-03-03 22:52:17

品牌	Logo	应用领域
恩智浦 - NXP		/
页数	文件大小	规格书
24页	136K
描述
4-bit I2C-bus and SMBus low power I/O port with interrupt and reset

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PCA9537DP.118 数据手册

PCA9537

4-bit I²C-bus and SMBus low power I/O port with interrupt and

reset

Rev. 05 — 7 May 2009

Product data sheet

1. General description

The PCA9537 is a 10-pin CMOS device that provides 4 bits of General Purpose parallel

Input/Output (GPIO) expansion with interrupt and reset for I²C-bus/SMBus applications

and was developed to enhance the NXP Semiconductors family of I²C-bus I/O expanders.

I/O expanders provide a simple solution when additional I/O is needed for ACPI power

switches, sensors, push-buttons, LEDs, fans, etc.

The PCA9537 consists of a 4-bit Conﬁguration register (input or output selection),

4-bit Input Port register, 4-bit Output Port register and a 4-bit Polarity Inversion register

(active HIGH or active LOW operation). 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 Port 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 PCA9537 open-drain interrupt output (INT) 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. The power-on reset sets the registers to their

default values and initializes the device state machine. The RESET pin causes the same

reset/initialization to occur without de-powering the device.

The I²C-bus address is ﬁxed and allows only one device on the same I²C-bus/SMBus.

2. Features

I 4-bit I²C-bus GPIO with interrupt and reset

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

I 5 V tolerant I/Os

I Polarity Inversion register

I Active LOW interrupt output

I Active LOW reset input

I Low standby current

I Noise ﬁlter on SCL/SDA inputs

I No glitch on power-up

I Internal power-on reset

I 4 I/O pins that default to 4 inputs

I 0 Hz to 400 kHz clock frequency

I ESD protection exceeds 2000 V HBM per JESD22-A114, 200 V MM per

JESD22-A115 and 1000 V CDM per JESD22-C101

12 3 4 5 6 7...24

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