M48Z35 Datasheet PDF - ST Microelectronics
| Part Number | M48Z35 | |
| Description | 256 Kbit (32 Kbit x 8) ZEROPOWER SRAM | |
| Manufacturers | ST Microelectronics | |
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M48Z35
M48Z35Y
256 Kbit (32 Kbit x 8) ZEROPOWER® SRAM
Features
■ Integrated, ultra low power SRAM, power-fail
control circuit, and battery
■ READ cycle time equals WRITE cycle time
■ Automatic power-fail chip deselect and WRITE
protection
■ WRITE protect voltages:
(VPFD = power-fail deselect voltage)
– M48Z35: VCC = 4.75 to 5.5 V;
4.5 V ≤ VPFD ≤ 4.75 V
– M48Z35Y: 4.5 to 5.5 V;
4.2 V ≤ VPFD ≤ 4.5 V
■ Self-contained battery in the CAPHAT™ DIP
package
■ Packaging includes a 28-lead SOIC and
SNAPHAT® top (to be ordered separately)
■ Pin and function compatible with JEDEC
standard 32 K x 8 SRAMs
■ SOIC package provides direct connection for a
SNAPHAT® top which contains the battery
■ RoHS compliant
– Lead-free second level interconnect
28
1
PCDIP28
battery CAPHAT™
SNAPHAT®
battery
28
1
SOH28
June 2011
Doc ID 2608 Rev 10
1/24
www.st.com
1
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M48Z35, M48Z35Y
1 Description
Description
The M48Z35/Y ZEROPOWER® RAM is a 32 K x 8, non-volatile static RAM that integrates
power-fail deselect circuitry and battery control logic on a single die. The monolithic chip is
available in two special packages to provide a highly integrated battery-backed memory
solution.
The M48Z35/Y is a non-volatile pin and function equivalent to any JEDEC standard 32 K 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™ houses
the M48Z35/Y silicon with a 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® housing containing the battery. The 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 damage due to the high temperatures required for device surface-
mounting. The SNAPHAT housing is keyed to prevent reverse insertion.
The SOIC and battery packages are shipped separately in plastic anti-static tubes or in tape
& reel form.
For the 28-lead SOIC, the battery package (i.e. SNAPHAT) part number is “M4Z28-
BR00SH1.”
Figure 1. Logic diagram
VCC
15
A0-A14
8
DQ0-DQ7
W M48Z35
M48Z35Y
E
G
VSS
AI01616D
Doc ID 2608 Rev 10
5/24
Preview 5 Page |
Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for M48Z35 electronic component. |
| Information | Total 24 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ M48Z35.PDF Datasheet ] | |
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