DESCRIPTION

The X25043/45 combines three popular functions, Watchdog Timer, Voltage Supervision, and E2PROM in a single package. This combination lowers the system cost and reduces the board space requirements.

FEATURES

? Programmable Watchdog Timer

? Low VCC Detection

? Reset Signal Valid to VCC = 1V

? 1MHz Clock Rate

? 512 X 8 Bits Serial E2PROM

—4 Byte Page Mode

? Low Power CMOS

—50μA Standby Current

—3mA Active Current

? 2.7V To 5.5V Power Supply

? Block LockTM

—Protect 1/4, 1/2 or all of E2PROM Array

? Built-in Inadvertent Write Protection

—Power-Up/Power-Down protection circuitry

—Write Latch

—Write Protect Pin

? High Reliability

—Endurance: 100,000 cycles per byte

—Data Retention: 100 Years

—ESD protection: 2000V on all pins

? Available Packages

—8-Lead PDlP

—8-Lead SOIC

—14-Lead TSSOP

? X25043 = Active LOW RESET

? X25045 = Active HIGH RESET