M48T129V-85PM1 STMicroelectronics, M48T129V-85PM1 Datasheet - Page 5

• Manufacturer Part Number: M48T129V-85PM1
• Description: IC TIMEKPR NVRAM 1MBIT 3V 32-DIP
• Manufacturer: STMicroelectronics
• Series: Timekeeper®r
• Type: Clock/Calendar/NVSRAMr

Specifications of M48T129V-85PM1

• Memory Size: 1M (128K x 8)
• Time Format: HH:MM:SS (24 hr)
• Date Format: YY-MM-DD-dd
• Interface: Parallel
• Voltage - Supply: 3 V ~ 3.6 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Through Hole
• Package / Case: 32-DIP (600 mil) Module
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-2835-5

M48T129V, M48T129Y
1
Description
The M48T129Y/V TIMEKEEPER
time clock with programmable alarms and a watchdog timer. The special DIP package
provides a fully integrated battery-backed memory and real-time clock solution. The
M48T129Y/V directly replaces industry standard 128 Kb x 8 SRAM. It also provides the non-
volatility of Flash without any requirement for special WRITE timing or limitations on the
number of WRITEs that can be performed.
The 32-pin, 600 mil DIP hybrid houses a controller chip, SRAM, quartz crystal, and a long-
life lithium button cell in a single package.
Figure 1.
Table 1.
DQ0-DQ7
A0-A16
IRQ/FT
RST
V
V
W
G
E
CC
SS
Logic diagram
Signal names
Address inputs
Data Inputs / outputs
Chip enable input
Output enable input
WRITE enable input
Reset output (open drain)
Interrupt / frequency test output (open drain)
Supply voltage
Ground
A0-A16
Doc ID 5710 Rev 4
®
W
G
E
RAM is a 128 Kb x 8 non-volatile static RAM and real-
17
M48T129Y
M48T129V
V CC
V SS
8
DQ0-DQ7
RST
IRQ/FT
Description
AI02260
5/28