M41T94
512 Bit (64 bit x8) SERIAL RTC (SPI) SRAM
FEATURES SUMMARY s 2.7 TO 5.5V OPERATING VOLTAGE
s s
Figure 1. 16-pin ...
M41T94
512 Bit (64 bit x8) SERIAL RTC (SPI) SRAM
FEATURES SUMMARY s 2.7 TO 5.5V OPERATING
VOLTAGE
s s
Figure 1. 16-pin SOIC Package
SERIAL PERIPHERAL INTERFACE (SPI) 2.5 TO 5.5V OSCILLATOR OPERATING
VOLTAGE AUTOMATIC SWITCH-OVER and DESELECT CIRCUITRY CHOICE OF POWER-FAIL DESELECT
VOLTAGES (VCC = 2.7 to 5.5V): – THS = VSS; 2.55V ≤ VPFD ≤ 2.70V – THS = VCC; 4.20V ≤ VPFD ≤ 4.50V Figure 2. 28-pin SOIC Package
16 1
s
SO16 (MQ)
s
s
COUNTERS FOR TENTHS/HUNDREDTHS OF SECONDS, SECONDS, MINUTES, HOURS, DAY, DATE, MONTH, YEAR, and CENTURY 44 BYTES OF GENERAL PURPOSE RAM PROGRAMMABLE ALARM and INTERRUPT FUNCTION (VALID EVEN DURING BATTERY BACK-UP MODE) WATCHDOG TIMER MICROPROCESSOR POWER-ON RESET BATTERY LOW FLAG LOW OPERATING CURRENT OF 2.0mA ULTRA-LOW BATTERY SUPPLY CURRENT OF 500nA (MAX) PACKAGING INCLUDES A 28-LEAD SOIC and SNAPHAT® TOP (to be ordered separately) or 16-LEAD SOIC 28-LEAD SOIC PACKAGE PROVIDES DIRECT CONNECTION FOR A SNAPHAT TOP WHICH CONTAINS THE BATTERY and CRYSTAL
SNAPHAT (SH) Battery & Crystal
s s
s s s s s
28 1
SOH28 (MH)
s
s
June 2003
Rev. 2.0
1/31
M41T94
TABLE OF CONTENTS SUMMARY DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Figure 3. Logic Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Table 1. Signal Names . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....
