Features
■ Integrated ultra low power SRAM, real-time clock, power-fail control circuit, and battery
■ BYTEWIDE™ RAM-like clock access
■ BCD coded year, month, day, date, hours, minutes, and seconds
■ Typical clock accuracy of ±1 minute a month, at 25 °C
■ Automatic power-fail chip deselect and write protection
■ Write protect VPFD = Power-fail deselect voltage): – M48T08: VCC = 4.75 to 5.5 V 4.5 V ≤ VPFD ≤ 4.75 V – M48T18/T08Y: VCC = 4.5 to 5.5 V 4.2 V ≤ VPFD ≤ 4.5 V
■ Software controlled clock calibration for high accuracy applications
■ Self-contained battery and crystal in the CAPHAT™ DIP package
■ Packaging includes a 28-lead SOIC and SNAPHAT® top (to be ordered separately)
■ SOIC package provides direct connection for a snaphat top which contains the battery and crystal