Datasheet > 935277418118

935277418118

更新时间： 2024-11-12 09:22:27

品牌	Logo	应用领域
恩智浦 - NXP		光电二极管
页数	文件大小	规格书
34页	434K
描述
8 I/O, PIA-GENERAL PURPOSE, PDSO16

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935277418118 数据手册

PCA9538

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

reset

Rev. 6 — 6 February 2013

Product data sheet

1. General description

The PCA9538 is a 16-pin CMOS device that provides 8 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 PCA9538 consists of an 8-bit Configuration register (input or output selection),

8-bit Input Port register, 8-bit Output Port register and an 8-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 PCA9538 is identical to the PCA9554 except for the removal of the internal I/O

pull-up resistor which greatly reduces power consumption when the I/Os are held LOW,

replacement of A2 with RESET and different address range.

The PCA9538 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.

Two hardware pins (A0 and A1) vary the fixed I²C-bus address and allow up to four

devices to share the same I²C-bus/SMBus.

2. Features and benefits

 8-bit I²C-bus GPIO with interrupt and reset

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

(5.0 V  10 % for PCA9538PW/Q900 AEC-Q100 compliant devices)

 5 V tolerant I/Os

 Polarity Inversion register

 Active LOW interrupt output

 Active LOW reset input

 Low standby current

 Noise filter on SCL/SDA inputs

 No glitch on power-up

12 3 4 5 6 7...34

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与935277418118相关器件

型号	品牌	获取价格	描述	数据表
935277425118	NXP	获取价格	DATACOM, INTERFACE CIRCUIT, PDSO8, 3.90 MM, PLASTIC, MS-012, SO-8
935277468112	NXP	获取价格	IC 1-CHANNEL, SGL POLE DOUBLE THROW SWITCH, PDSO8, SOT-96, ROHS COMPLIANT, PLASTIC, SO-8,
935277468118	NXP	获取价格	IC 1-CHANNEL, SGL POLE DOUBLE THROW SWITCH, PDSO8, SOT-96, ROHS COMPLIANT, PLASTIC, SO-8,
935277535512	NXP	获取价格	935277535512
935277584512	NXP	获取价格	935277584512
935277634118	NXP	获取价格	LV/LV-A/LVX/H SERIES, 8-BIT DRIVER, TRUE OUTPUT, PDSO20, 4.40 MM, PLASTIC, SOT-360-1, TSSO
935277682118	NXP	获取价格	LVC/LCX/Z SERIES, OCTAL 4-BIT DRIVER, TRUE OUTPUT, PBGA96, 13.50 X 5.50 MM, 1.05 MM HEIGHT
935277682518	NXP	获取价格	LVC/LCX/Z SERIES, OCTAL 4-BIT DRIVER, TRUE OUTPUT, PBGA96, 13.50 X 5.50 MM, 1.05 MM HEIGHT
935277682557	NXP	获取价格	LVC/LCX/Z SERIES, OCTAL 4-BIT DRIVER, TRUE OUTPUT, PBGA96, 13.50 X 5.50 MM, 1.05 MM HEIGHT
935277724557	NXP	获取价格	8-BIT, FLASH, 33MHz, MICROCONTROLLER, PQFP44, 10 X 10 MM, 1 MM HEIGHT, PLASTIC, MS-026, SO

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