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MFG:ST Package Cooled:DIP D/C:06/
Part Number: M48Z128
MFG: ST
Package Cooled: DIP
D/C: 06/
Description: The M48Z128/128Y ZEROPOWER®RAM is a 128 Kbit x8 non-volatile static RAM that integrates...
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M48Z128
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DataSheet
General Description
M48Z128 General Description
The M48Z128/128Y ZEROPOWER®RAM is a 128 Kbit x8 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-up memory solution.
The M48Z128/128Y is a non-volatile pin and function equivalent to any JEDEC standard 128K x8 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 32 pin 600mil DIP Module houses the M48Z128/128Y silicon with a long life lithium button cell in a single package.
For surface mount environments ST provides a Chip Set solution consisting of a 28 pin 330mil SOIC NVRAM Supervisor (M40Z300) and a 32 pin TSOP (8 x 20mm) LPSRAM (M68Z128) packages.
The 28 pin 330mil SOIC provides sockets with gold plated contacts at both ends for direct connection to a separate SNAPHAT housing containing the battery.
M48Z128 Maximum Ratings
|
Symbol |
Parameter |
Value |
Unit |
|
TA |
Ambient Operating Temperature |
0 to 70 |
|
|
TSTG |
Storage Temperature (VCC Off) |
40 to 70 |
|
|
TBIAS |
Temperature Under Bias |
10 to 70 |
|
|
TSLD(2) |
Lead Solder Temperature for 10 seconds |
260 |
|
|
VIO |
Input or Output Voltages |
0.3 to 7 |
V |
|
VCC |
Supply Voltage |
0.3 to 7 |
V |
permanent damage to the device. This is a stress rating only and functional operation
of the device at these or any other conditions above those indicated in the operational
section of this specification is not implied. Exposure to the absolute maximum rating conditions
for extended periods of time may affect reliability.
2. Soldering temperature not to exceed 260 for 10 seconds (total thermal budget not to exceed
150 for longer than 30 seconds).
CAUTION: Negative undershoots below 0.3V are not allowed on any pin while in the Battery Back-up mode.
M48Z128 Features
` INTEGRATED LOW POWER SRAM, POWER-FAIL CONTROL CIRCUIT and BATTERY
` CONVENTIONAL SRAM OPERATION; UNLIMITED WRITE CYCLES
` 10 YEARS of DATA RETENTION in the ABSENCE of POWER
` AUTOMATIC POWER-FAIL CHIP DESELECT and WRITE PROTECTION
` WRITE PROTECT VOLTAGES (VPFD = Power-fail Deselect Voltage):
M48Z128: 4.50V 3 VPFD 3 4.75V
M48Z128Y: 4.20V 3 VPFD 3 4.50V
` BATTERY INTERNALLY ISOLATED UNTIL POWER IS APPLIED
` PIN and FUNCTION COMPATIBLE with JEDEC STANDARD 128K x 8 SRAMs
` SURFACE MOUNT CHIP SET PACKAGING INCLUDES a 28-PIN SOIC and a 32-LEAD TSOP (SNAPHAT TOP TO
BE ORDERED SEPARATELY)
` SOIC PACKAGE PROVIDES DIRECT CONNECTION for a SNAPHAT TOP WHICH CONTAINS the BATTERY
` SNAPHAT®HOUSING (BATTERY) IS REPLACEABLE
` CONVENTIONAL SRAM OPERATION; UNLIMITED WRITE CYCLES
` 10 YEARS of DATA RETENTION in the ABSENCE of POWER
` AUTOMATIC POWER-FAIL CHIP DESELECT and WRITE PROTECTION
` WRITE PROTECT VOLTAGES (VPFD = Power-fail Deselect Voltage):
M48Z128: 4.50V 3 VPFD 3 4.75V
M48Z128Y: 4.20V 3 VPFD 3 4.50V
` BATTERY INTERNALLY ISOLATED UNTIL POWER IS APPLIED
` PIN and FUNCTION COMPATIBLE with JEDEC STANDARD 128K x 8 SRAMs
` SURFACE MOUNT CHIP SET PACKAGING INCLUDES a 28-PIN SOIC and a 32-LEAD TSOP (SNAPHAT TOP TO
BE ORDERED SEPARATELY)
` SOIC PACKAGE PROVIDES DIRECT CONNECTION for a SNAPHAT TOP WHICH CONTAINS the BATTERY
` SNAPHAT®HOUSING (BATTERY) IS REPLACEABLE
M48Z128 Connection Diagram
M48Z128
PDF/DataSheet Download
- Datasheet: M48Z128
- File Size: 108759 KB
- Manufacturer: STMICROELECTRONICS [STMicroelectronics]
- Click here to Download
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