DESCRIPTION

The PTN3500 is a general purpose maintenance and control device. It features an on-board E2PROM that can be used to store error codes or board manufacturing data for read–back by application software for diagnostic purposes.

The 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 PTN3500 has three address pins allowing up to 8 devices to share the common two wire I2C software protocol serial data bus.

The PTN3500 supports live insertion to facilitate usage in removable cards on backplane systems.

FEATURES

? I2C to parallel port expander

? Internal 256x8 E2PROM

? Self timed write cycle (5 ms typ.)

? Four byte page write operation

? Controlled pull-up on address lines

? Low voltage VCC range of +2.5 V to +3.6 V

? 5 V – tolerant I/Os

? Low standby current (< 60 μA )

? Power on Reset

? Supports Live Insertion

? Compatible with SMBus specification version 1.1

? High E2PROM endurance and data retention

? Available in SO16 and TSSOP16 package options