M48T18-100MH1

5V, 64Kbit 8KB x8 TIMEKEEPER® SRAM

SUMMARY DESCRIPTION

The M48T08/18/08Y TIMEKEEPER® RAM is an 8K x 8 non-volatile static RAM and real time clock which is pin and functional compatible with the DS1643. The monolithic chip is available in two special packages to provide a highly integrated battery backed-up memory and real time clock solution.

FEATURES SUMMARY

■ 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 VOLTAGES VPFD= Power-fail Deselect Voltage:

   – M48T08: VCC= 4.75 to 5.5V 4.5V ≤VPFD ≤4.75V

   – M48T18/T08Y: VCC= 4.5 to 5.5V 4.2V≤VPFD ≤4.5V

■ 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

■ PIN AND FUNCTION COMPATIBLE WITH

    DS1643 and JEDEC STANDARD 8K x 8 SRAMs

■ RoHS COMPLIANCE

    Lead-free components are compliant with the RoHS Directive.