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M48Z35Y-70MH1TR Datasheet(PDF) 1 Page - STMicroelectronics

Part # M48Z35Y-70MH1TR
Description  256 Kbit 32Kb x8 ZEROPOWER SRAM
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M48Z35Y-70MH1TR Datasheet(HTML) 1 Page - STMicroelectronics

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August 1999
M48Z35
M48Z35Y
256 Kbit (32Kb x8) ZEROPOWER® SRAM
s
INTEGRATED ULTRA LOW POWER SRAM,
POWER-FAIL CONTROL CIRCUIT and
BATTERY
s
READ CYCLE TIME EQUALS WRITE CYCLE
TIME
s
AUTOMATIC POWER-FAIL CHIP DESELECT
and WRITE PROTECTION
s
WRITE PROTECT VOLTAGES
(VPFD = Power-fail Deselect Voltage):
– M48Z35: 4.50V
≤ VPFD ≤ 4.75V
– M48Z35Y: 4.20V
≤ VPFD ≤ 4.50V
s
SELF-CONTAINED BATTERY in the CAPHAT
DIP PACKAGE
s
PACKAGING INCLUDES a 28-LEAD SOIC and
SNAPHAT® TOP (to be Ordered Separately)
s
SOIC PACKAGE PROVIDES DIRECT
CONNECTION for a SNAPHAT TOP which
CONTAINS the BATTERY and CRYSTAL
s
PIN and FUNCTION COMPATIBLE with
JEDEC STANDARD 32K x8 SRAMs
DESCRIPTION
The M48Z35/35Y ZEROPOWER® RAM is a 32
Kbit x8 non-volatile static RAM that integrates
power-fail deselect circuitry and battery control
logic on a single die. The monolithic chip is avail-
able in two special packages to provide a highly in-
tegrated battery backed-up memory solution.
Figure 1. Logic Diagram
AI01616D
15
A0-A14
W
DQ0-DQ7
VCC
M48Z35
M48Z35Y
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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