PCA9575HF

更新时间： 2024-09-17 05:59:47

品牌	Logo	应用领域
恩智浦 - NXP		/
页数	文件大小	规格书
38页	193K
描述
16-bit I2C-bus and SMBus, level translating, low voltage GPIO with reset and interrupt

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PCA9575HF 数据手册

PCA9575

16-bit I²C-bus and SMBus, level translating, low voltage GPIO

with reset and interrupt

Rev. 03 — 9 November 2009

Product data sheet

1. General description

The PCA9575 is a CMOS device that provides 16 bits of General Purpose parallel

Input/Output (GPIO) expansion in low voltage processor and handheld battery powered

mobile applications and was developed to enhance the NXP family of I²C-bus I/O

expanders. The improvements include lower supply current, lower operating voltage of

1.1 V to 3.6 V, separate supply rails to allow voltage level translation anywhere between

1.1 V and 3.6 V, 400 kHz clock frequency, and smaller packaging. Any of the 16 I/O ports

can be conﬁgured as an input or output independent of each other and default on start-up

to inputs.

I/O expanders provide a simple solution when additional I/Os are needed while keeping

interconnections to a minimum; for example in battery powered mobile applications and

clamshell devices for interfacing to sensors, push buttons, keypad, etc. In addition to

providing a ﬂexible set of GPIOs, it simpliﬁes interconnection of a processor running at

one voltage level to I/O devices operating at a different (usually higher) voltage level.

PCA9575 has built-in level shifting feature that makes these devices extremely ﬂexible in

mixed signal environments where communication between incompatible I/Os is required.

The core of PCA9575 can operate at a voltage as low as 1.1 V while each I/O bank can

operate in the range 1.1 V to 3.6 V. Bus hold with programmable on-chip pull-up or

pull-down feature for I/Os is also provided.

The output stage consists of two banks each of 8-bit conﬁguration registers, input

registers, interrupt mask registers, output registers, bus-hold and pull-up/pull-down

registers and polarity inversion registers. These registers allow the system master to

program and conﬁgure 16 GPIOs through the I²C-bus.

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

conﬁguration register bits. The data for each input or output is kept in the corresponding

Input or Output register. The polarity of the read registers can be inverted with the Polarity

Inversion register (active HIGH or active LOW operation). Either a bus-hold function or

pull-up/pull-down feature can be selected by programming corresponding registers. The

bus-hold provides a valid logic level when the I/O bus is not actively driven. When

bus-hold feature is not selected, the I/O ports can be conﬁgured to have pull-up or

pull-down by programming the pull-up/pull-down conﬁguration register.

An open-drain interrupt output pin (INT) allows monitoring of the input pins and is

asserted each time a change occurs on an input port unless that port is masked

(default = masked). A ‘GPIO All Call’ command allows programming multiple PCA9575s

at the same time even if they have different individual I²C-bus addresses. This allows

optimal code programming when more than one device needs to be programmed with the

same instruction or if all outputs need to be turned on or off at the same time. The internal

12 3 4 5 6 7...38

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PCA9575HF 替代型号

型号	品牌	替代类型	描述	数据表
PCA9575PW1	NXP	功能相似	16-bit I2C-bus and SMBus, level translating, low voltage GPIO with reset and interrupt
PCA9575PW2	NXP	功能相似	16-bit I2C-bus and SMBus, level translating, low voltage GPIO with reset and interrupt

与PCA9575HF相关器件

型号	品牌	获取价格	描述	数据表
PCA9575HF,118	NXP	获取价格	PCA9575 - 16-bit I²C-bus and SMBus, level tra
PCA9575PW1	NXP	获取价格	16-bit I2C-bus and SMBus, level translating, low voltage GPIO with reset and interrupt
PCA9575PW1,118	NXP	获取价格	PCA9575 - 16-bit I²C-bus and SMBus, level tra
PCA9575PW2	NXP	获取价格	16-bit I2C-bus and SMBus, level translating, low voltage GPIO with reset and interrupt
PCA9575PW2,118	NXP	获取价格	PCA9575 - 16-bit I²C-bus and SMBus, level tra
PCA9600	NXP	获取价格	Dual bidirectional bus buffer
PCA9600_11	NXP	获取价格	Dual bidirectional bus buffer
PCA9600D	NXP	获取价格	Dual bidirectional bus buffer
PCA9600D,112	NXP	获取价格	PCA9600 - Dual bidirectional bus buffer SOIC 8-Pin
PCA9600DP	NXP	获取价格	Dual bidirectional bus buffer

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