GPIO Expander Features Dual Independent I/O Voltage Rails

The SX1501 family of GPIO expanders offers 4-, 8-, and 16-channels, operating with a drain voltage range from 1.2V to 5.5V.

The devices connect easily to low core-voltage chipsets, such as those typically used in battery-powered or handheld applications, without the need for level-translating circuits.

Each channel of the bi-directional I/O offers mask-programmable interrupts, programmable pull-up/pull-down, and push/pull outputs. Every 5V-tolerant I/O output is capable of sinking 12mA for LED blinking, while a few of the channels on each device are capable of sinking up to 24mA.

Both devices are available in a 3mm x 3mm 20-QFN package, as well as in 20-pin or 28-pin TSSOP packages for the SX1501 and SX1503 respectively. An extended, -40°C to 85°C, temperature range version of the SX1503 is packaged in a 4mmx 4mm 28-QFN.

 

FEATURES Two independent 1.2V to 5.5V I/O voltages 400kHz I2C interface Programmable logic functions Hardware/software reset

APPLICATIONS Low core-voltage applications PDAs MP3 players GPS units Digital Signal Controllers (DSCs)

 

 

Semtech / SX1501