DESCRIPTION

The X9523 combines two Digitally Controlled Potentiometers (DCPs), V1 / Vcc Power-on Reset (POR) circuitry, qnd two programmable voltage monitor inputs with software and hardware indicators. All functions of the X9523 are accessed by an industry standard 2-Wire serial interface.

The DCPs of the X9523 may be utilized to control the bias and modulation currents of the laser diode in a Fiber Optic module. The programmable POR circuit may be used to ensure that V1 / Vcc is stable before power is applied to the laser diode / module. The programmable voltage monitors may be used for monitoring various module alarm levels.

FEATURES

? Two Digitally Controlled Potentiometers (DCPs)

—100 Tap - 10kΩ

—256 Tap - 100kΩ

—Nonvolatile

—Write Protect Function

? 2-Wire Industry Standard Serial Interface

? Power-On Reset (POR) Circuitry

—Programmable Threshold Voltage

—Software Selectable reset timeout

—Manual Reset

? Two Supplementary Voltage Monitors

—Programmable Threshold Voltages

? Single Supply Operation

—2.7V to 5.5V

? Hot Pluggable

? 20 Pin Package

—TSSOP

? Pb-Free Plus Anneal Available (RoHS Compliant)