DESCRIPTION
The PTN3501 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.

FEATURES
• I2C to parallel port expander
• Internal 256x8 E2PROM
• Self timed write cycle (5 ms typ.)
• 16 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 TSSOP20 package