PCA9501BS

8位I2C和SMBus I / O端口，中断， 2千位EEPROM和6个地址引脚 8-bit I2C and SMBus I/O port with interrupt, 2-kbit EEPROM and 6 address pins

General description

The PCA9501 is an 8-bit I/O expander with an on-board 2-kbit EEPROM.

The I/O expandable eight quasi-bidirectional data pins can be independently assigned as inputs or outputs to monitor board level status or activate indicator devices such as LEDs.

The system master writes to the I/O configuration bits in the same way as for the PCF8574. The data for each input or output is kept in the corresponding input or output register. The system master can read all registers.

Features

8 general purpose input/output expander/collector

Replacement for PCF8574 with integrated 2-kbit EEPROM

Internal 256×8 EEPROM

Self timed write cycle 5 ms typical

16 byte page write operation

I2C-bus and SMBus interface logic

Internal power-on reset

Noise filter on SCL/SDA inputs

Active LOW interrupt output

6 address pins allowing up to 64 devices on the I2C-bus/SMBus

No glitch on power-up

Supports hot insertion

Power-up with all channels configured as inputs

Low standby current

Operating power supply voltage range of 2.5 V to 3.6 V

5 V tolerant inputs/outputs

0 Hz to 400 kHz clock frequency

ESD protection exceeds 2000 V HBM per JESD22-A114, 200 V MM per JESD22-A115 and 1000 V CDM per JESD22-C101

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

Packages offered: SO20, TSSOP20, HVQFN20

Applications

Board version tracking and configuration

Board health monitoring and status reporting

Multi-card systems in telecom, networking, and base station infrastructure equipment

Field recall and troubleshooting functions for installed boards

General-purpose integrated I/O with memory

Replacement for PCF8574 with integrated 2-kbit EEPROM

Bus master sees GPIO and EEPROM as two separate devices

Six hardware address pins allow up to 64 PCA9501s to be located in the same I2C-bus/SMBus