PCF8574A - 用于 I2C 总线的远程 8 位 I/O 扩展器

PCF8574A是TI德州仪器公司的一款I2CIO扩展器产品，PCF8574A是用于 I2C 总线的远程 8 位 I/O 扩展器，本站介绍了PCF8574A的封装应用图解、特点和优点、功能等，并给出了与PCF8574A相关的TI元器件型号供参考。

PCF8574A - 用于 I2C 总线的远程 8 位 I/O 扩展器 - I2CIO扩展器 - I2C - 德州仪器

产品特性

Low Standby-Current Consumption of 10μAMax
I2C to Parallel-Port Expander
Open-Drain Interrupt Output
Compatible With Most Microcontrollers
Latched Outputs With High-Current Drive Capability for Directly Driving LEDs
Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II

产品应用

Telecom Shelters: Filter Units
Servers
Routers (Telecom Switching Equipment)
Personal Computers
Personal Electronics
Industrial Automation
Products with GPIO-Limited Processors

产品说明

This 8-bit input/output (I/O) expander for the two-line bidirectional bus (I2C) is designed for 2.5-V to 6-V VCC operation.

The PCF8574A device provides general-purpose remote I/O expansion for most microcontroller families via the I2C interface [serial clock (SCL), serial data (SDA)].

The device features an 8-bit quasi-bidirectional I/O port (P0–P7), including latched outputs with high-current drive capability for directly driving LEDs. Each quasi-bidirectional I/O can be used as an input or output without the use of a data-direction control signal. At power on, the I/Os are high. In this mode, only a current source to VCC is active.

产品器件信息

PART NUMBER	PACKAGE (PIN)	BODY SIZE (NOM)
PCF8574A	VQFN (20)	4.50 mm × 3.50 mm
	PDIP (16)	19.30 mm × 6.35 mm
	SOIC (16)	10.30 mm × 7.50 mm
	TSSOP (20)	6.50 mm × 4.40 mm
	TVSOP (20)	5.00 mm × 4.40 mm

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