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
■ Frequency test output for real-time clock
■ Automatic power-fail chip deselect and WRITE protection
■ WRITE protect voltages (VPFD = power-fail deselect voltage): – M48T58: VCC = 4.75 to 5.5 V; 4.5 V ≤ VPFD ≤ 4.75 V – M48T58Y: VCC = 4.5 to 5.5 V; 4.2 V ≤ VPFD ≤ 4.5 V
■ 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 housing containing the battery and crystal