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PCF8574-用于 I2C 总线的远程 8 位 I/O 扩展器
PCF8574-I2CIO扩展器-I2C-接口
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PCF8574 - 用于 I2C 总线的远程 8 位 I/O 扩展器

PCF8574是TI公司(德州仪器)的一款I2CIO扩展器产品,PCF8574是用于 I2C 总线的远程 8 位 I/O 扩展器,本站介绍了PCF8574的产品说明、应用、特性等,并给出了与PCF8574相关的TI元器件型号供参考.

PCF8574 - PCF8574 Remote 8-Bit I/O Expander for I2C Bus - TI德州仪器(Texas Instruments)

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 PCF8574 device provides general-purpose remote I/O expansion for most microcontroller families by way of 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 NUMBERPACKAGE (PIN)BODY SIZE (NOM)
PCF5874TVSOP (20)5.00 mm × 4.40 mm
SOIC (16)10.30 mm × 7.50 mm
PDIP (16)19.30 mm × 6.35 mm
TSSOP (20)6.50 mm × 4.40 mm
QFN (16)3.00 mm × 3.00 mm
VQFN (20)4.50 mm × 3.50 mm
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