PCA9554AD datasheet(1/35 Pages) NXP

tên linh kiện	PCA9554AD

Giải thích chi tiết về linh kiện	8-bit I2C-bus and SMBus I/O port with interrupt

PDF	35 Pages

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nhà sản xuất	NXP [NXP Semiconductors]

Trang chủ	http://www.nxp.com

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1.

General description

The PCA9554 and PCA9554A are 16-pin CMOS devices that provide 8 bits of General

Purpose parallel Input/Output (GPIO) expansion for I2C-bus/SMBus applications and

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

The improvements include higher drive capability, 5 V I/O tolerance, lower supply current,

individual I/O configuration, 400 kHz clock frequency, and smaller packaging. I/O

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

switches, sensors, push buttons, LEDs, fans, and so on.

The PCA9554/PCA9554A consist 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 read register can be inverted with the Polarity Inversion register. All

registers can be read by the system master. Although pin-to-pin and I2C-bus address

compatible with the PCF8574 series, software changes are required due to the

enhancements and are discussed in Application Note AN469.

The PCA9554/PCA9554A open-drain interrupt 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. The power-on reset sets the registers to

their default values and initializes the device state machine.

Three hardware pins (A0, A1, A2) vary the fixed I2C-bus address and allow up to eight

devices to share the same I2C-bus/SMBus. The PCA9554A is identical to the PCA9554

except that the fixed I2C-bus address is different allowing up to sixteen of these devices

(eight of each) on the same I2C-bus/SMBus.

2.

Features and benefits

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

 5 V tolerant I/Os

 Polarity Inversion register

 Active LOW interrupt output

 Low standby current

 Noise filter on SCL/SDA inputs

 No glitch on power-up

 Internal power-on reset

 8 I/O pins which default to 8 inputs

 0 Hz to 400 kHz clock frequency

PCA9554; PCA9554A

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

Rev. 9 — 19 March 2013

Product data sheet

Số phần tương tự - PCA9554AD

nhà sản xuất	tên linh kiện	bảng dữ liệu	Giải thích chi tiết về linh kiện
NXP Semiconductors	PCA9554AD	183Kb / 20P	8-bit I2C and SMBus I/O port with interrupt 2004 Sep 30
	PCA9554AD	187Kb / 30P	8-bit I2C-bus and SMBus I/O port with interrupt Rev. 07-13 November 2006
	PCA9554ADB	183Kb / 20P	8-bit I2C and SMBus I/O port with interrupt 2004 Sep 30
Texas Instruments	PCA9554ADB	650Kb / 33P	REMOTE 8-BIT I2C AND SMBus I/O EXPANDER WITH INTERRUPT OUTPUT AND CONFIGURATION REGISTERS
NXP Semiconductors	PCA9554ADB	187Kb / 30P	8-bit I2C-bus and SMBus I/O port with interrupt Rev. 07-13 November 2006

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Mô tả tương tự - PCA9554AD

nhà sản xuất	tên linh kiện	bảng dữ liệu	Giải thích chi tiết về linh kiện
NXP Semiconductors	PCA9554	183Kb / 20P	8-bit I2C and SMBus I/O port with interrupt 2004 Sep 30
Catalyst Semiconductor	CAT9554A	267Kb / 16P	8-bit I2C and SMBus I/O Port with Interrupt
NXP Semiconductors	PCA9555	583Kb / 34P	16-bit I2C-bus and SMBus I/O port with interrupt Rev. 08-22 October 2009
	PCA9534	163Kb / 25P	8-bit I2C-bus and SMBus low power I/O port with interrupt Rev. 03-6 November 2006
	PCA9554	187Kb / 30P	8-bit I2C-bus and SMBus I/O port with interrupt Rev. 07-13 November 2006
	PCA9554D,112	590Kb / 35P	8-bit I2C-bus and SMBus I/O port with interrupt Rev. 9-19 March 2013
	PCA9555	583Kb / 34P	16-bit I2C-bus and SMBus I/O port with interrupt Rev. 08-22 October 2009
	PCA9555D-T	583Kb / 34P	16-bit I2C-bus and SMBus I/O port with interrupt Rev. 08-22 October 2009
ON Semiconductor	CAT9557	171Kb / 17P	8-Bit I2C-Bus and SMBus I/O Port March, 2011 ??Rev. 0
Pericom Semiconductor C...	PI4IOE5V9555	127Kb / 1P	16-bit I2C-bus and SMBus I/O port with interrupt

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