M48T58Y Datasheet, PDF (1/27 Pages) STMicroelectronics – 5.0V, 64 Kbit (8 Kb x 8) TIMEKEEPER SRAM

M48T58
M48T58Y
5.0V, 64 Kbit (8 Kb x 8) TIMEKEEPER^® SRAM
FEATURES SUMMARY
s INTEGRATED, ULTRA LOW POWER SRAM,
REAL TIME CLOCK, POWER-FAIL CONTROL
CIRCUIT and BATTERY
s BYTEWIDE™ RAM-LIKE CLOCK ACCESS
s BCD CODED YEAR, MONTH, DAY, DATE,
HOURS, MINUTES, and SECONDS
s FREQUENCY TEST OUTPUT FOR REAL
TIME CLOCK
s AUTOMATIC POWER-FAIL CHIP DESELECT
and WRITE PROTECTION
s WRITE PROTECT VOLTAGES
(V_PFD = Power-fail Deselect Voltage):
– M48T58: V_CC = 4.75 to 5.5V
4.5V ≤ V_PFD ≤ 4.75V
– M48T58Y: V_CC = 4.5 to 5.5V
4.2V ≤ V_PFD ≤ 4.5V
s SELF-CONTAINED BATTERY and CRYSTAL
IN THE CAPHAT™ DIP PACKAGE
s PACKAGING INCLUDES a 28-LEAD SOIC and
SNAPHAT^® TOP (to be Ordered Separately)
s SOIC PACKAGE PROVIDES DIRECT
CONNECTION FOR A SNAPHAT HOUSING
CONTAINING THE BATTERY and CRYSTAL
s PIN and FUNCTION COMPATIBLE WITH
JEDEC STANDARD 8 Kb x 8 SRAMs
Figure 1. 28-pin PCDIP, CAPHAT™ Package
28
1
PCDIP28 (PC)
Battery/Crystal
CAPHAT
Figure 2. 28-pin SOIC Package
SNAPHAT (SH)
Battery/Crystal
28
1
SOH28 (MH)
May 2002
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