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