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M48T02 Datasheet(PDF) 1 Page - STMicroelectronics

Part # M48T02
Description  16 Kbit 2Kb x8 TIMEKEEPER[ SRAM
PDF  15 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M48T02 Datasheet(HTML) 1 Page - STMicroelectronics

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M48T02
M48T12
16 Kbit (2Kb x8) TIMEKEEPER® SRAM
November 1998
1/15
INTEGRATED ULTRA LOW POWER SRAM,
REAL TIME CLOCK and POWER-FAIL
CONTROL CIRCUIT
BYTEWIDE
™ RAM-LIKECLOCK ACCESS
BCD CODED YEAR, MONTH, DAY, DATE,
HOURS, MINUTES and SECONDS
TYPICAL CLOCK ACCURACY of
± 1 MINUTE
a MONTH, AT 25
°C
SOFTWARE CONTROLLED CLOCK
CALIBRATION for HIGH ACCURACY
APPLICATIONS
AUTOMATIC POWER-FAILCHIP DESELECTand
WRITE PROTECTION
WRITE PROTECT VOLTAGES
(VPFD = Power-fail Deselect Voltage):
– M48T02: 4.5V
≤ VPFD ≤ 4.75V
– M48T12: 4.2V
≤ VPFD ≤ 4.5V
SELF-CONTAINED BATTERY and CRYSTAL
in the CAPHAT DIP PACKAGE
PIN and FUNCTION COMPATIBLE with
JEDEC STANDARD 2Kb x8 SRAMs
DESCRIPTION
The M48T02/12 TIMEKEEPER® RAM is a 2Kb x8
non-volatile static RAM and real time clock which
is pin and functional compatible with the DS1642.
A special 24 pin 600mil DIP CAPHAT
™ package
houses the M48T02/12 silicon with a quartz crystal
and a long life lithium button cell to form a highly
integratedbatterybacked-upmemory and real time
clock solution.
AI01027
11
A0-A10
W
DQ0-DQ7
VCC
M48T02
M48T12
G
VSS
8
E
Figure 1. Logic Diagram
A0-A10
Address Inputs
DQ0-DQ7
Data Inputs / Outputs
E
Chip Enable
G
Output Enable
W
Write Enable
VCC
Supply Voltage
VSS
Ground
Table 1. Signal Names
24
1
PCDIP24 (PC)
Battery/Crystal CAPHAT


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