PCF8575C - 具有中断输出的远程 16 位 I2C 和 SMBus I/O 扩展器

PCF8575C是TI德州仪器公司的一款I2CIO扩展器产品，PCF8575C是具有中断输出的远程 16 位 I2C 和 SMBus I/O 扩展器，本站介绍了PCF8575C的封装应用图解、特点和优点、功能等，并给出了与PCF8575C相关的TI元器件型号供参考。

PCF8575C - 具有中断输出的远程 16 位 I2C 和 SMBus I/O 扩展器 - I2CIO扩展器 - I2C - 德州仪器

产品特性

I2C to Parallel-Port Expander
Open-Drain Interrupt Output
Low Standby-Current Consumption of 10μAMaximum
Compatible With Most Microcontrollers
400-kHz Fast I2C Bus
Address by Three Hardware Address Pins for Use of up to Eight Devices
Latched Outputs With High-Current Drive Capability for Directly Driving LEDs
Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II
ESD Protection Exceeds JESD 22
- 2000-V Human-Body Model
- 200-V Machine Model
- 1000-V Charged-Device Model

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 16-bit I/O expander for the two-line bidirectional bus (I2C) is designed for 4.5-V to 5.5-V VCC operation.

The PCF8575C provides general-purpose remote I/O expansion for most microcontroller families via the I2C interface serial clock (SCL) and serial data (SDA).

The device features a 16-bit quasi-bidirectional input/output (I/O) port (P07–P00, P17–P10), 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 in 3-state mode. The strong pullup to VCC allows fast-rising edges into heavily loaded outputs. This device turns on when an output is written high and is switched off by the negative edge of SCL. The I/Os should be high before being used as inputs. After power on, as all the I/Os are set to 3-state, all of them can be used as inputs. Any change in setting of the I/Os as either inputs or outputs can be done with the write mode. If a high is applied externally to an I/O that has been written earlier to low, a large current (IOL) flows to GND.

产品器件信息

PART NUMBER	PACKAGE (PIN)	BODY SIZE
PCF8575C	SSOP (24)	8.20 mm × 5.30 mm
	QSOP (24)	8.65 mm × 3.90
	TVSOP (24)	5.00 mm × 4.50 mm
	SOIC (24)	15.40 mm × 7.50 mm
	TSSOP (24)	7.80 mm × 4.40 mm
	QFN (24)	4.0 mm × 4.0 mm

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