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