M48T35Y-70MH1 STMicroelectronics, M48T35Y-70MH1 Datasheet - Page 5

• Manufacturer Part Number: M48T35Y-70MH1
• Description: Real Time Clock Advanced Analog
• Manufacturer: STMicroelectronics

Specifications of M48T35Y-70MH1

• Function: Clock, Calendar, NV Timekeeping RAM, Watchdog Timer, Battery Backup
• Rtc Memory Size: 32768 B
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 4.5 V
• Maximum Operating Temperature: + 70 C
• Minimum Operating Temperature: 0 C
• Mounting Style: SMD/SMT
• Rtc Bus Interface: Parallel
• Package / Case: SOH
• Time Format: HH:MM:SS
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

M48T35, M48T35Y
1
Description
The M48T35/Y TIMEKEEPER
clock. The monolithic chip is available in two special packages to provide a highly integrated
battery-backed memory and real-time clock solution.
The M48T35/Y is a non-volatile pin and function equivalent to any JEDEC standard
32 Kb x 8 SRAM. It also easily fits into many ROM, EPROM, and EEPROM sockets,
providing the non-volatility of PROMs without any requirement for special WRITE timing or
limitations on the number of WRITEs that can be performed.
The 28-pin, 600 mil DIP CAPHAT
long life lithium button cell in a single package.
The 28-pin, 330 mil SOIC provides sockets with gold plated contacts at both ends for direct
connection to a separate SNAPHAT
unique design allows the SNAPHAT battery package to be mounted on top of the SOIC
package after the completion of the surface mount process. Insertion of the SNAPHAT
housing after reflow prevents potential battery and crystal damage due to the high
temperatures required for device surface-mounting. The SNAPHAT housing is keyed to
prevent reverse insertion. The SOIC and battery/crystal packages are shipped separately in
plastic anti-static tubes or in tape & reel form.
For the 28-lead SOIC, the battery/crystal package (e.g., SNAPHAT) part number is “M4T28-
BR12SH”.
Figure 1.
Logic diagram
A0-A14
®
W
G
Doc ID 2611 Rev 9
E
RAM is a 32 Kb x 8 non-volatile static RAM and real-time
™
15
houses the M48T35/Y silicon with a quartz crystal and a
®
housing containing the battery and crystal. The
V CC
V SS
M48T35Y
M48T35
8
DQ0-DQ7
Description
AI01620B
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