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PCA9554ADWR

更新时间： 2024-02-15 02:29:41

品牌	Logo	应用领域
德州仪器 - TI		输出元件
页数	文件大小	规格书
33页	650K
描述
REMOTE 8-BIT I2C AND SMBus I/O EXPANDER WITH INTERRUPT OUTPUT AND CONFIGURATION REGISTERS

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PCA9554ADWR 数据手册

PCA9554A

REMOTE 8-BIT I²C AND SMBus I/O EXPANDER

WITH INTERRUPT OUTPUT AND CONFIGURATION REGISTERS

www.ti.com

SCPS127A–SEPTEMBER 2006–REVISED FEBRUARY 2007

FEATURES

•

I²C to Parallel Port Expander

•

Power-Up With All Channels Configured as

Inputs

Open-Drain Active-Low Interrupt Output

•

No Glitch on Power-Up

Operating Power-Supply Voltage Range of

2.3 V to 5.5 V

Latched Outputs With High-Current Drive

Maximum Capability for Directly Driving LEDs

•

5-V Tolerant I/Os

400-kHz Fast I²C Bus

•

Latch-Up Performance Exceeds 100 mA Per

JESD 78, Class II

Three Hardware Address Pins Allow up to

Eight Devices on the I²C/SMBus

ESD Protection Exceeds JESD 22

–

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

200-V Machine Model (A115-A)

•

Input/Output Configuration Register

Polarity Inversion Register

Internal Power-On Reset

1000-V Charged-Device Model (C101)

DB, DBQ, DGV, DW,

OR PW PACKAGE

(TOP VIEW)

RGV PACKAGE

(TOP VIEW)

RGT PACKAGE

(TOP VIEW)

16 15 14 13

SCL

SDA

SCL

INT

SCL

INT

10 P7

GND

DESCRIPTION/ORDERING INFORMATION

This 8-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 PCA9554A consists of one 8-bit Configuration (input or output selection), Input, Output, and Polarity

Inversion (active high or active low) registers. At power-on, the I/Os are configured as inputs with a weak pull up

to V_CC. 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 PCA9554A 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 PCA9554A 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 PCA9554A can remain a simple slave device.

The device's outputs (latched) have high-current drive capability for directly driving LEDs and 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

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.

12 3 4 5 6 7...33

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PCA9554ADWR 替代型号

型号	品牌	替代类型	描述	数据表
PCA9534APW	TI	完全替代	REMOTE 8-BIT I2C AND SMBus LOW-POWER I/O EXPANDER WITH INTERRUPT OUTPUT AND CONFIGURATION
TCA9554APWR	TI	功能相似	暂无描述

与PCA9554ADWR相关器件

型号	品牌	获取价格	描述	数据表
PCA9554ADWRG4	TI	获取价格	Remote 8-Bit I<sup>2</sup>C and SMBus I/O Expander with Interrupt Output and C
PCA9554ADWT	TI	获取价格	8 I/O, PIA-GENERAL PURPOSE, PDSO16, PLASTIC, SOIC-16
PCA9554AN	NXP	获取价格	8-bit I2C and SMBus I/O port with interrupt
PCA9554AN,112	NXP	获取价格	PCA9554AN
PCA9554APW	NXP	获取价格	8-bit I2C and SMBus I/O port with interrupt
PCA9554APW	TI	获取价格	REMOTE 8-BIT I2C AND SMBus I/O EXPANDER WITH INTERRUPT OUTPUT AND CONFIGURATION REGISTERS
PCA9554APW,112	NXP	获取价格	8-bit I2C-bus and SMBus I/O port with interrupt
PCA9554APW,118	NXP	获取价格	8-bit I2C-bus and SMBus I/O port with interrupt
PCA9554APW/G,118	NXP	获取价格	PCA9554/PCA9554A - 8-bit I²C-bus and SMBus I/
PCA9554APWG4	TI	获取价格	REMOTE 8-BIT I2C AND SMBus I/O EXPANDER WITH INTERRUPT OUTPUT AND CONFIGURATION REGISTERS

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