M48T36 データシートの表示（PDF） - STMicroelectronics

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M48T36

CMOS 32K x 8 TIMEKEEPER SRAM

STMicroelectronics 

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

VCCQ

VSS

VSSQ

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

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