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Maxim > Products > [Memories: Volatile, NV, Multi-Function] 
DS1250AB, DS1250Y
4096k Nonvolatile SRAM


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Data Sheet
FULL DATA SHEET (PDF, 300kB)
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Description
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 as fast as 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
  • Underwriters Laboratories (UL®) Recognized

Key Specifications:   Memory (EPROM, EEPROM, ROM, NV SRAM)
Part Number Memory Type Memory Size Bus Type Real-Time Clock DIP with Internal Battery PowerCap Package Battery Monitor With GPIO Supply Voltage (min) (V) Supply Voltage (max) (V) Price**
DS1250AB  NV SRAM 512K x 8 Parallel No Yes Yes No No 4.75 5.25 $44.79 @ 1k
DS1250Y  4.5 5.5 $44.79 @ 1k
See All Memory (EPROM, EEPROM, ROM, NV SRAM) (54)
Notes:
**This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

Application Notes
  		• Application Note 202: NV SRAM Frequently Asked Questions - DS1250AB, DS1250Y
  		• Application Note 1066: Tech. Brief 39: NV SRAM Cross Reference Table - DS1250AB, DS1250Y
  		• Application Note 3759: Timing Considerations When Using NVSRAM - DS1250AB, DS1250Y
  		• Application Note 4006: NVSRAM Device Programmers - DS1250AB, DS1250Y
  		• Application Note 4289: Low-Temperature Data Retention in Nonvolatile SRAM - DS1250AB, DS1250Y
  		• Application Note 4392: How to Replace a DS1213 SmartSocket with an Equivalent-Density NV SRAM Module - DS1250AB

    Evaluation Kits
    none

    Reliability Reports
  		• Request Reliability Report for:
  		• Underwriters Laboratories (UL®) Recognized

    Software/Models
    none

    Ordering Information
    Notes:

    1. Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
    2. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
    3. Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions.
    4. * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.


    Devices: 1-29 of 29

    DS1250AB Notes Free
    Sample    		 Buy
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    DS1250AB-100+  
    		EDIP;32 pin;707 mm²
    Outline Drawing: 21-0245 (PDF)
    Land Pattern: Not Available
    Use pkgcode/variation: MDT32+6*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS1250AB-70+  
    		EDIP;32 pin;707 mm²
    Outline Drawing: 21-0245 (PDF)
    Land Pattern: Not Available
    Use pkgcode/variation: MDT32+6*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS1250AB-70IND+  
    		EDIP;32 pin;707 mm²
    Outline Drawing: 21-0245 (PDF)
    Land Pattern: Not Available
    Use pkgcode/variation: MDT32+6*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS1250AB-100IND+  
    		EDIP;32 pin;707 mm²
    Outline Drawing: 21-0245 (PDF)
    Land Pattern: Not Available
    Use pkgcode/variation: MDT32+6*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS1250AB-100   5% Tolerance, 100ns  
    		EDIP;32 pin;707 mm²
    Outline Drawing: 21-0245 (PDF)
    Land Pattern: Not Available
    Use pkgcode/variation: MDT32-6*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    DS1250AB-70   5% Tolerance, 70ns  
    		EDIP;32 pin;707 mm²
    Outline Drawing: 21-0245 (PDF)
    Land Pattern: Not Available
    Use pkgcode/variation: MDT32-6*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    DS1250AB-100IND    
    		EDIP;32 pin;707 mm²
    Outline Drawing: 21-0245 (PDF)
    Land Pattern: Not Available
    Use pkgcode/variation: MDT32-6*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    DS1250AB-70IND   5% Tolerance, 70ns  
    		EDIP;32 pin;707 mm²
    Outline Drawing: 21-0245 (PDF)
    Land Pattern: Not Available
    Use pkgcode/variation: MDT32-6*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    DS1250ABP-100+  
    		PCAP;34 pin;597 mm²
    Outline Drawing: 21-0246 (PDF)
    Land Pattern: Not Available
    Use pkgcode/variation: PC2+5*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS1250ABP-70+  
    		PCAP;34 pin;597 mm²
    Outline Drawing: 21-0246 (PDF)
    Land Pattern: Not Available
    Use pkgcode/variation: PC2+5*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS1250ABP-70IND+  
    		PCAP;34 pin;597 mm²
    Outline Drawing: 21-0246 (PDF)
    Land Pattern: Not Available
    Use pkgcode/variation: PC2+5*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS1250ABP-100   5% Tolerance, 100ns  
    		PCAP;34 pin;597 mm²
    Outline Drawing: 21-0246 (PDF)
    Land Pattern: Not Available
    Use pkgcode/variation: PC2-5*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    DS1250ABP-70   5% Tolerance, 70ns  
    		PCAP;34 pin;597 mm²
    Outline Drawing: 21-0246 (PDF)
    Land Pattern: Not Available
    Use pkgcode/variation: PC2-5*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    DS1250ABP-70IND   5% Tolerance, 70ns  
    		PCAP;34 pin;597 mm²
    Outline Drawing: 21-0246 (PDF)
    Land Pattern: Not Available
    Use pkgcode/variation: PC2-5*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    DS1250Y Notes Free
    Sample    		 Buy
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    DS1250Y-100IND+  
    		EDIP;32 pin;707 mm²
    Outline Drawing: 21-0245 (PDF)
    Land Pattern: Not Available
    Use pkgcode/variation: MDT32+6*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS1250Y-70IND+  
    		EDIP;32 pin;707 mm²
    Outline Drawing: 21-0245 (PDF)
    Land Pattern: Not Available
    Use pkgcode/variation: MDT32+6*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS1250Y-70+  
    		EDIP;32 pin;707 mm²
    Outline Drawing: 21-0245 (PDF)
    Land Pattern: Not Available
    Use pkgcode/variation: MDT32+6*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS1250Y-100   10% Tolerance, 100ns  
    		EDIP;32 pin;707 mm²
    Outline Drawing: 21-0245 (PDF)
    Land Pattern: Not Available
    Use pkgcode/variation: MDT32-6*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    DS1250Y-70   10% Tolerance, 70ns  
    		EDIP;32 pin;707 mm²
    Outline Drawing: 21-0245 (PDF)
    Land Pattern: Not Available
    Use pkgcode/variation: MDT32-6*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    DS1250Y-70-W    
    		EDIP;32 pin;707 mm²
    Outline Drawing: 21-0245 (PDF)
    Land Pattern: Not Available
    Use pkgcode/variation: MDT32-6*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    DS1250Y-100+  
    		EDIP;32 pin;707 mm²
    Outline Drawing: 21-0245 (PDF)
    Land Pattern: Not Available
    Use pkgcode/variation: MDT32+6*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS1250Y-100IND    
    		EDIP;32 pin;707 mm²
    Outline Drawing: 21-0245 (PDF)
    Land Pattern: Not Available
    Use pkgcode/variation: MDT32-6*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    DS1250Y-70IND   10% Tolerance, 70ns  
    		EDIP;32 pin;707 mm²
    Outline Drawing: 21-0245 (PDF)
    Land Pattern: Not Available
    Use pkgcode/variation: MDT32-6*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    DS1250YP-100+  
    		PCAP;34 pin;597 mm²
    Outline Drawing: 21-0246 (PDF)
    Land Pattern: Not Available
    Use pkgcode/variation: PC2+5*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS1250YP-70+  
    		PCAP;34 pin;597 mm²
    Outline Drawing: 21-0246 (PDF)
    Land Pattern: Not Available
    Use pkgcode/variation: PC2+5*
    		0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS1250YP-70IND+  
    		PCAP;34 pin;597 mm²
    Outline Drawing: 21-0246 (PDF)
    Land Pattern: Not Available
    Use pkgcode/variation: PC2+5*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS1250YP-100   10% Tolerance, 100ns  
    		PCAP;34 pin;597 mm²
    Outline Drawing: 21-0246 (PDF)
    Land Pattern: Not Available
    Use pkgcode/variation: PC2-5*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    DS1250YP-70   10% Tolerance, 70ns  
    		PCAP;34 pin;597 mm²
    Outline Drawing: 21-0246 (PDF)
    Land Pattern: Not Available
    Use pkgcode/variation: PC2-5*
    		0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    DS1250YP-70IND   10% Tolerance, 70ns  
    		PCAP;34 pin;597 mm²
    Outline Drawing: 21-0246 (PDF)
    Land Pattern: Not Available
    Use pkgcode/variation: PC2-5*
    		-40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis

    More Information
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    2007-12-20
    This page last modified: 2007-12-20


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