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M48T35Y Datasheet(PDF) 1 Page - STMicroelectronics

Part # M48T35Y
Description  256 Kbit 32Kb x8 TIMEKEEPER SRAM
PDF  18 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M48T35Y Datasheet(HTML) 1 Page - STMicroelectronics

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February 2000
M48T35
M48T35Y
256 Kbit (32Kb x8) TIMEKEEPER® SRAM
s
INTEGRATED ULTRA LOW POWER SRAM,
REAL TIME CLOCK, POWER-FAIL CONTROL
CIRCUIT and BATTERY
s
BYTEWIDE™ RAM-LIKE CLOCK ACCESS
s
BCD CODED YEAR, MONTH, DAY, DATE,
HOURS, MINUTES and SECONDS
s
FREQUENCY TEST OUTPUT for REAL TIME
CLOCK
s
AUTOMATIC POWER-FAIL CHIP DESELECT
and WRITE PROTECTION
s
WRITE PROTECT VOLTAGES
(VPFD = Power-fail Deselect Voltage):
– M48T35: 4.5V
≤ VPFD ≤ 4.75V
– M48T35Y: 4.2V
≤ VPFD ≤ 4.5V
s
SELF-CONTAINED BATTERY and CRYSTAL
in the CAPHAT DIP PACKAGE
s
SOIC PACKAGE PROVIDES DIRECT
CONNECTION for a SNAPHAT HOUSING
CONTAINING the BATTERY and CRYSTAL
s
SNAPHAT® HOUSING (BATTERY and
CRYSTAL) is REPLACEABLE
s
PIN and FUNCTION COMPATIBLE with
JEDEC STANDARD 32Kb x8 SRAMs
Figure 1. Logic Diagram
AI01620B
15
A0-A14
W
DQ0-DQ7
VCC
M48T35
M48T35Y
G
VSS
8
E
Table 1. Signal Names
A0-A14
Address Inputs
DQ0-DQ7
Data Inputs / Outputs
E
Chip Enable
G
Output Enable
W
Write Enable
VCC
Supply Voltage
VSS
Ground
28
1
28
1
SOH28 (MH)
SNAPHAT (SH)
Battery
PCDIP28 (PC)
Battery CAPHAT


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