M48T128Y-70PM1 STMicroelectronics, M48T128Y-70PM1 Datasheet - Page 5

• Manufacturer Part Number: M48T128Y-70PM1
• Description: IC TIMEKPR NVRAM 1MBIT 5V 32-DIP
• Manufacturer: STMicroelectronics
• Series: Timekeeper®r
• Type: Clock/Calendar/NVSRAMr

Specifications of M48T128Y-70PM1

• Memory Size: 1M (128K x 8)
• Time Format: HH:MM:SS (24 hr)
• Date Format: YY-MM-DD-dd
• Interface: Parallel
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Through Hole
• Package / Case: 32-DIP (600 mil) Module
• Function: Clock, Calendar, NV Timekeeping RAM, Battery Backup
• Rtc Memory Size: 1 MB
• Supply Voltage (max): 4.5 V to 5.5 V
• Supply Voltage (min): 4.5 V
• Maximum Operating Temperature: + 70 C
• Minimum Operating Temperature: 0 C
• Mounting Style: Through Hole
• Rtc Bus Interface: Parallel
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-2834-5

M48T128Y, M48T128V
1
Description
The M48T128Y/V TIMEKEEPER
time clock. The special DIP package provides a fully integrated battery-backed memory and
real-time clock solution. The M48T128Y/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
Logic diagram
Signal names
V
V
NC
W
G
E
CC
SS
A0-A16
Doc ID 5746 Rev 6
®
Address inputs
Data inputs / outputs
Chip enable
Output enable
WRITE enable
Supply voltage
Ground
Not connected internally
W
G
E
RAM is a 128 Kb x 8 non-volatile static RAM and real-
17
M48T128Y
M48T128V
V CC
V SS
8
DQ0-DQ7
Description
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