PCA9671BS,118

输入/输出扩展, 16bit, 400 kHz, I2C, SMBus, 2.3 V, 5.5 V, HVQFN

Overview

The PCA9671 provides general purpose remote I/O expansion for most microcontroller families via the two-line bidirectional bus I²C-bus and is a part of the Fast-mode Plus Fm+ family.

The PCA9671 is a drop in upgrade for the PCF8575 providing higher I²C-bus speeds 1 MHz versus 400 kHz so that the output can support PWM dimming of LEDs, higher I²C-bus drive 30 mA versus 3 mA so that many more devices can be on the bus without the need for bus buffers, higher total package sink capacity 400 mA versus 100 mA that supports having all 25 mA LEDs on at the same time and more device addresses 64 versus 8 to allow many more devices on the bus without address conflicts.

The difference between the PCA9671 and the PCF8575 is that the interrupt output on the PCF8575 is replaced by a RESET input on the PCA9671.

The device consists of a 16-bit quasi-bidirectional port and an I²C-bus interface. The PCA9671 has a low current consumption and includes latched outputs with 25 mA high current drive capability for directly driving LEDs. The internal Power-On Reset POR, hardware reset pin RESET or software reset sequence initializes the I/Os as inputs.

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## Features

* 1 MHz I²C-bus interface

* Compliant with the I²C-bus Fast-mode and Standard-mode

* SDA with 30 mA sink capability for 4000 pF buses

* 2.3 V to 5.5 V operation with 5.5 V tolerant I/Os

* 16-bit remote I/O pins that default to inputs at power-up

* Latched outputs with 25 mA sink capability for directly driving LEDs

* Total package sink capability of 400 mA

* Active LOW reset input

* 64 programmable slave addresses using 3 address pins

* Readable device ID manufacturer, device type, and revision

* Low standby current

* -40 °C to +85 °C operation

* ESD protection exceeds 2000 V HBM per JESD22-A114 and 1000 V CDM per JESD22-C101

* Latch-up testing is done to JEDEC standard JESD78 which exceeds 100 mA

* Packages offered: SO24, TSSOP24, HVQFN24, DHVQFN24

## Target Applications

* LED signs and displays

* Servers

* Industrial control

* Medical equipment

* PLCs

* Cellular telephones

* Gaming machines

* Instrumentation and test measurement

## Features