PTN3501

• 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 A )
• Power on Reset
• Supports Live Insertion
• Compatible with SMBus specification version 1.1
• High E2PROM endurance and data retention
• Available in TSSOP20 package

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 readback 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 PTN3501 has six address pins allowing up to 64 devices to share the common two wire I²C software protocol serial data bus.

The PTN3501 supports live insertion to facilitate usage in removable cards on backplane systems.

The PTN3501 is an alternative to the functionally similar PTN3500 for systems where a high number of devices are required to share the same I²C-bus without need for an additional I²C-bus I/O expander.