DS1250AB:4096k Nonvolatile SRAM

The DS1250 4096k Nonvolatile SRAMs are 4,194,304-bit, fully static, nonvolatile SRAMs organized as 524,288 words by 8 bits. Each complete NV SRAM has a self-contained lithium energy source and control circuitry which constantly monitors VCC for an out-of-tolerance condition. When such a condition occurs, the lithium energy source is automatically switched on and write protection is unconditionally enabled to prevent data corruption. DIP-package DS1250 devices can be used in place of existing 512k x 8 static RAMs directly conforming to the popular byte-wide 32-pin DIP standard. DS1250 devices in the PowerCap Module package are directly surface mountable and are normally paired with a DS9034PC PowerCap to form a complete Nonvolatile SRAM module. There is no limit on the number of write cycles that can be executed and no additional support circuitry is required for microprocessor interfacing.

Key Features
  • 10 years minimum data retention in the absence of external power
  • Data is automatically protected during power loss
  • Replaces 512k x 8 volatile static RAM, EEPROM or Flash memory
  • Unlimited write cycles
  • Low-power CMOS
  • Read and write access times of 70ns
  • Lithium energy source is electrically disconnected to retain freshness until power is applied for the first time
  • Full ±10% VCC operating range (DS1250Y)
  • Optional ±5% VCC operating range (DS1250AB)
  • Optional industrial temperature range of -40°C to +85°C, designated IND
  • JEDEC standard 32-pin DIP package
  • PowerCap Module (PCM) package
    • Directly surface-mountable module
    • Replaceable snap-on PowerCap provides lithium backup battery
    • Standardized pinout for all nonvolatile SRAM products
    • Detachment feature on PCM allows easy removal using a regular screwdriver
DS1250AB, DS1250Y: Pin Assignment
DS1250AB, DS1250Y: Pin Assignment
titleDownload file
DS1250AB-DS1250Y Data SheetDS1250AB-DS1250Y.pdf
Part NumberMemory TypeMemory SizeBus TypeVSUPPLY
minmaxSee Notes
DS1250ABNV SRAM512K x 8Parallel4.755.25EDIP/32
$57.07 @1k
$58.73 @1k
Ordering Information
Part NumberNotesStatusRecommended ReplacementPackageTempRoHS
DS1250AB-1005% Tolerance, 100nsNo Longer AvailableDS1250AB-70+EDIP,;32 pin;707.2 mm²0°C to +70°CSee data sheet
DS1250AB-100+ActiveEDIP,;32 pin;707.2 mm²0°C to +70°CLead Free
DS1250AB-100INDNo Longer AvailableDS1250AB-70IND+EDIP,;32 pin;707.2 mm²-40°C to +85°CSee data sheet
DS1250AB-100IND+ActiveEDIP,;32 pin;707.2 mm²-40°C to +85°CLead Free
DS1250AB-705% Tolerance, 70nsNo Longer AvailableDS1250AB-70+EDIP,;32 pin;707.2 mm²0°C to +70°CSee data sheet
DS1250AB-70+ActiveEDIP,;32 pin;707.2 mm²0°C to +70°CLead Free
DS1250AB-70IND5% Tolerance, 70nsNo Longer AvailableDS1250AB-70IND+EDIP,;32 pin;707.2 mm²-40°C to +85°CSee data sheet
DS1250AB-70IND+ActiveEDIP,;32 pin;707.2 mm²-40°C to +85°CLead Free
DS1250ABP-1005% Tolerance, 100nsNo Longer AvailableDS1250ABP-70+PCAP,;34 pin;596.9 mm²0°C to +70°CSee data sheet
DS1250ABP-100+ActivePCAP,;34 pin;596.9 mm²0°C to +70°CLead Free
Part NumberNotesStatusRecommended ReplacementPackageTempRoHS
DS1250ABP-705% Tolerance, 70nsNo Longer AvailableDS1250ABP-70+PCAP,;34 pin;596.9 mm²0°C to +70°CSee data sheet
DS1250ABP-70+ActivePCAP,;34 pin;596.9 mm²0°C to +70°CLead Free
DS1250ABP-70IND5% Tolerance, 70nsNo Longer AvailableDS1250ABP-70IND+PCAP,;34 pin;596.9 mm²-40°C to +85°CSee data sheet
DS1250ABP-70IND+ActivePCAP,;34 pin;596.9 mm²-40°C to +85°CLead Free
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Timing Considerations When Using NVSRAM DS1350Y
Tech. Brief 39: NV SRAM Cross Reference Table DS1270Y
NV SRAM Frequently Asked Questions DS1350Y
DS1250AB-DS1250Y.pdf DS1250AB