M48T129V-85PM1 datasheet(4/30 Pages) STMICROELECTRONICS

Part #	M48T129V-85PM1

Description	5.0 or 3.3V, 1 Mbit (128 Kbit x 8) TIMEKEEPER SRAM

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

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M48T129Y, M48T129V

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DESCRIPTION

The M48T129Y/V TIMEKEEPER® RAM is a

128 Kb x 8 non-volatile static RAM and real-time

clock with programmable alarms and a watchdog

timer. The special DIP package provides a fully in-

tegrated battery back-up memory and real-time

clock solution. The M48T129Y/V directly replaces

industry standard 128 Kb x 8 SRAM. It also pro-

vides the non-volatility of Flash without any re-

quirement for special WRITE timing or limitations

on the number of WRITEs that can be performed.

For surface-mount environments ST provides an

equivalent SMT solution consisting of a 44-pin,

330mil

SOIC

TIMEKEEPER

SUPERVISOR

(M48T201V/Y) and a 32-pin, (TSOP, 8 x 20mm)

1Mb LPSRAM.

The 44-pin, 330mil SOIC provides sockets with

gold plated contacts at both ends for direct con-

nection to a separate SNAPHAT® housing con-

taining the battery.

The unique design allows the SNAPHAT battery

package to be mounted on top of the SOIC pack-

age after the completion of the surface-mount pro-

cess. Insertion of the SNAPHAT housing after

reflow prevents potential battery damage due to

the high temperatures required for device surface-

mounting. The SNAPHAT housing is keyed to pre-

vent reverse insertion.

The SNAPHAT battery package is shipped sepa-

rately in plastic anti-static tubes or in Tape & Reel

form. The part number is “M4Txx-BR12SH1” (see

Table 18., page 28).

The 32-pin, 600mil DIP Hybrid houses a controller

chip, SRAM, quartz crystal, and a long life lithium

button cell in a single package.

Figure 2. Logic Diagram

Table 1. Signal Names

AI02260

17

A0-A16

DQ0-DQ7

VCC

M48T129Y

M48T129V

G

VSS

8

E

W

RST

IRQ/FT

A0-A16

Address Inputs

DQ0-DQ7

Data Inputs / Outputs

E

Chip Enable Input

G

Output Enable Input

W

WRITE Enable Input

RST

Reset Output (open drain)

IRQ/FT

Interrupt / Frequency Test

Output (open drain)

VCC

Supply Voltage

VSS

Ground

Similar Part No. - M48T129V-85PM1

Manufacturer	Part #	Datasheet	Description
STMicroelectronics	M48T129V-85PM1	140Kb / 22P	3.3V-5V 1 Mbit 128Kb x8 TIMEKEEPER SRAM
STMicroelectronics	M48T129V-85PM1	445Kb / 28P	5.0 or 3.3 V, 1 Mbit (128 Kbit x 8) TIMEKEEPER짰 SRAM

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Similar Description - M48T129V-85PM1

Manufacturer	Part #	Datasheet	Description
Hanbit Electronics Co.,...	HMNR1288D	315Kb / 14P	5.0 or 3.3V, 1 Mbit (128 Kbit x 8) TIMEKEEPER NVSRAM
DLG Hanbit co.,Ltd.	HMNR1288D	727Kb / 11P	5.0 or 3.3V, 1 Mbit (128 Kbit x 8) TIMEKEEPER NVSRAM
STMicroelectronics	M48Z128Y	295Kb / 21P	5.0V OR 3.3V, 1 Mbit (128 Kbit x 8) ZEROPOWER SRAM
Hanbit Electronics Co.,...	HMNR5128D	274Kb / 13P	5.0 or 3.3V, 4 Mbit (512 Kbit x 8) TIMEKEEPER NVSRAM
DLG Hanbit co.,Ltd.	HMNR5128D	724Kb / 11P	5.0 or 3.3V, 4 Mbit (512 Kbit x 8) TIMEKEEPER NVSRAM
STMicroelectronics	M48T129Y	445Kb / 28P	5.0 or 3.3 V, 1 Mbit (128 Kbit x 8) TIMEKEEPER짰 SRAM
STMicroelectronics	M48Z128	339Kb / 20P	5.0 V or 3.3 V, 1 Mbit (128 Kbit x 8) ZEROPOWER짰 SRAM
Hanbit Electronics Co.,...	HMNR88D	258Kb / 13P	5.0 or 3.3V, 64K bit (8 Kbit x 8) TIMEKEEPER NVSRAM
DLG Hanbit co.,Ltd.	HMNR88D	741Kb / 12P	5.0 or 3.3V, 64K bit (8 Kbit x 8) TIMEKEEPER NVSRAM
STMicroelectronics	M440T1MV	454Kb / 26P	3.3V, 32 Mbit (1024 Kbit x 32) TIMEKEEPER SRAM

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M48T129V-85PM1 Datasheet(PDF) 4 Page - STMicroelectronics

M48T129V-85PM1 Datasheet(HTML) 4 Page - STMicroelectronics

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