M48T36 Datasheet, PDF (1/17 Pages) STMicroelectronics – CMOS 32K x 8 TIMEKEEPER SRAM

M48T36
CMOS 32K x 8 TIMEKEEPER SRAM
INTEGRATED ULTRA LOW POWER SRAM,
REAL TIME CLOCK, POWER-FAIL CONTROL
CIRCUIT and BATTERY
FREQUENCY TEST OUTPUT for REAL TIME
CLOCK
AUTOMATICPOWER-FAIL CHIP DESELECTand
WRITE PROTECTION
WRITE PROTECT VOLTAGE:
– M48T36Y: 4.2V ≤ VPFD ≤ 4.5V
SMALL OUTLINE PACKAGE PROVIDES
DIRECT CONNECTION for a SNAPHAT
HOUSING CONTAINING the BATTERY and
CRYSTAL
SNAPHAT HOUSING (BATTERY and
CRYSTAL) REPLACEABLE
MICROPROCESSOR POWER-ON RESET
PROGRAMMABLE ALARM OUTPUT ACTIVE
in the BATTERY BACK-UP MODE
BATTERY LOW WARNING
PRODUCT PREVIEW
44
1
SOH44 (MH)
Battery SNAPHAT
Figure 1. Logic Diagram
VCC VCCQ
15
A0-A14
8
DQ0-DQ7
Table 1. Signal Names
A0-A14
DQ0-DQ7
IRQ/FT
RST
WDI
E
G
W
VCC
V_CCQ
VSS
V_SSQ
Address Inputs
Data Inputs / Outputs
Interrupt / Frequency Test Output
(Open Drain)
Power Fail Reset Output (Open Drain)
Watchdog Interrupt
Chip Enable
Output Enable
Write Enable
Supply Voltage
Supply Voltage (DQ)
Ground
Ground (DQ)
WDI
M48T36
W
E
G
VSS VSSQ
July 1995
This is preliminary information on a new product now in development. Details are subject to change witho ut notice.
IRQ/FT
RST
AI01624
1/17