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