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Analog Devices Inc./Maxim Integrated DS1250AB-100IND
- Part No.:
- DS1250AB-100IND
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Memory
- Package:
- 32-DIP Module (0.600", 15.24mm)
- Datasheet:
-
DS1250AB-100IND.pdf
- Description:
- IC NVSRAM 4MBIT PARALLEL 32EDIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,686
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Product details
Overview
DS1250AB-100IND from Maxim Integrated is a 4,194,304-bit (524,288 × 8) nonvolatile static RAM with integrated lithium backup, ±5% VCC tolerance (4.75–5.25 V), 70 ns access time, and industrial temperature support (–40°C to +85°C). It replaces volatile SRAM, EEPROM, or Flash in battery-backed data logging systems where write endurance and instant-on retention are critical.
For engineers reviewing the DS1250AB-100IND datasheet, DS1250AB-100IND pinout, DS1250AB-100IND application, or DS1250AB-100IND equivalent, key selection factors include its self-contained power-fail detection, automatic write protection below 4.5 V, 10-year data retention without external power, JEDEC 32-pin DIP compatibility, and absence of external support circuitry for microprocessor interfacing.
Technical Context
The DS1250AB-100IND integrates SRAM, lithium battery, and voltage-monitoring control logic into a single monolithic package. Its power-switching circuit automatically engages the lithium source when VCC drops below ~3.0 V and disables all inputs while placing outputs in high-impedance state to prevent corruption.
It operates as a byte-wide parallel memory with full static timing: read cycles require CE and OE low with WE high; write cycles require CE and WE low after address stabilization. All 19 address lines (A0–A18) and 8 bidirectional data lines (DQ0–DQ7) conform to standard SRAM interface protocols without glue logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4,194,304 bits (524,288 × 8), directly replaces 512k × 8 SRAMs in existing designs |
| Access Time | 70 ns - guarantees deterministic read/write latency compatible with 14 MHz bus timing |
| VCC Range | 4.75 V to 5.25 V (±5%) - supports stable operation across regulated 5 V rails with typical tolerance budgets |
| Data Retention | 10 years minimum without external power - enabled by sealed lithium cell and freshness seal disconnect until first power-up |
| Operating Temp | –40°C to +85°C - qualified for industrial environments including factory automation and outdoor telemetry |
| Write Endurance | Unlimited - no wear-out mechanism, unlike EEPROM or Flash, enabling continuous logging applications |
| Write Protect Threshold | 4.50–4.75 V - triggers automatic hardware lockout before supply collapse corrupts data |
Pinout & Package
DS1250AB-100IND uses a JEDEC-standard 32-pin Extended DIP (740-mil) package with through-hole mounting. The package integrates SRAM, lithium battery, and control circuitry in a single encapsulated unit.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A18 | Address Inputs | 19-bit address bus supporting full 524,288-word addressing; TTL-compatible input thresholds |
| DQ0–DQ7 | Data I/O | Bidirectional 8-bit data bus; high-impedance during deselect or write to avoid bus contention |
| CE | Chip Enable | Active-low chip select; initiates read/write when low and synchronized with WE/OE |
| WE | Write Enable | Active-low write strobe; controls direction of DQ bus and enables write cycle timing |
| OE | Output Enable | Active-low output enable; gates data drivers independently of CE/WE for flexible bus control |
| VCC | Power Supply | +5 V supply input; monitored continuously for out-of-tolerance conditions triggering backup mode |
| GND | Ground | Reference return path for all signals and internal battery switching circuitry |
| NC | No Connect | Unused pins; must remain unconnected per design - no internal connection or function |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Lithium Backup | Self-contained energy source electrically disconnected until first VCC application, preserving full 10-year retention capacity |
| Automatic Power-Fail Protection | Hardware-level write lockout triggered at 4.5 V threshold, with <1.5 µs response to VCC decay |
| Zero External Support Circuitry | Operates as drop-in replacement for standard SRAM - no external capacitors, regulators, or monitoring ICs required |
| Standardized Pinout | JEDEC 32-pin DIP layout matches legacy 512k × 8 SRAM footprints, enabling board-level upgrades without redesign |
| Industrial Temperature Qualification | Full functionality and data retention guaranteed from –40°C to +85°C, validated per Maxim's industrial test flow |
Applications
| Industrial Data Logger | Medical Device Memory |
|---|---|
Use Scenario: Continuous acquisition of sensor readings (temperature, pressure, ECG) in unattended field-deployed equipment with infrequent maintenance. IC Role / Device Role / Timing Role: Nonvolatile SRAM storing real-time waveform buffers and configuration parameters during AC power loss or battery depletion. Use Value: Ensures zero data loss across power interruptions; eliminates need for slow Flash writes or complex wear-leveling firmware. | Use Scenario: Patient monitor retaining last 72 hours of vital sign history and calibration settings during transport or mains failure. IC Role / Device Role / Timing Role: Primary data buffer with guaranteed 10-year retention, serving as fail-safe memory between volatile DRAM and archival storage. Use Value: Meets IEC 62304 Class C safety requirements for data integrity without software intervention or external supervision. |
| Factory Automation Controller | Avionics Black Box Recorder |
Use Scenario: PLC-based motion controller preserving position registers, fault logs, and recipe data across scheduled shutdowns and brownouts. IC Role / Device Role / Timing Role: Byte-accessible nonvolatile memory mapped directly to microcontroller address space for deterministic read/write access. Use Value: Enables sub-70 ns memory access while maintaining data integrity - critical for real-time motion profiling and diagnostics. | Use Scenario: Crash-protected flight data recorder capturing timestamped telemetry during rapid power loss or physical impact. IC Role / Device Role / Timing Role: High-reliability memory element with automatic VCC fail detection and immediate write disable to prevent corruption on impact-induced voltage sag. Use Value: Certified for DO-160 Section 22 crash survivability due to autonomous hardware-level protection and no reliance on host processor response. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar nonvolatile SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DS1250Y-70IND+ | Wider VCC range (±10%, 4.5–5.5 V); lower write-protect threshold (4.25–4.5 V) | Better suited for less-regulated 5 V supplies; slightly reduced noise margin on write protect | Select DS1250Y-70IND+ only if system VCC variation exceeds ±5% and design tolerates earlier backup activation |
| STK15C88-70I | Same density and 70 ns speed, but uses external capacitor-based backup; no integrated lithium | Requires external supercapacitor and charge circuit; shorter retention (~1–2 weeks typical) | Choose STK15C88-70I only when long-term retention is not required and cost sensitivity outweighs reliability needs |
Compared with DS1250Y-70IND+ and STK15C88-70I, the DS1250AB-100IND provides tighter supply regulation tolerance and guaranteed 10-year retention via integrated lithium - making it optimal for mission-critical industrial and medical systems where data integrity over decades is non-negotiable.
Availability
DS1250AB-100IND is available at Aetrix Electronics and suitable for industrial data loggers, medical patient monitors, and factory automation controllers requiring stable component supply, long-lifecycle assurance, and RoHS-compliant through-hole packaging.
Supply support for DS1250AB-100IND includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Maxim Integrated (now part of Analog Devices) is a semiconductor company specializing in analog, mixed-signal, and power management ICs for industrial, medical, and communications applications.
The DS1250AB-100IND belongs to Maxim's nonvolatile SRAM product line, engineered specifically for systems demanding seamless, hardware-governed data retention during unpredictable power loss - eliminating firmware dependencies and maximizing uptime in harsh environments.
FAQ
What is the guaranteed data retention period for the DS1250AB-100IND?
The DS1250AB-100IND guarantees a minimum of 10 years of data retention in the absence of external power. This is achieved through an integrated, factory-sealed lithium energy source that remains electrically disconnected until first application of VCC, preserving full capacity. The 10-year value is assured by component selection, process control, and design - not measured per unit but statistically validated across production lots.
Does the DS1250AB-100IND require external support components for battery backup operation?
No, the DS1250AB-100IND requires no external support components. It integrates the SRAM array, lithium backup cell, voltage-monitoring circuitry, and power-switching logic into a single JEDEC 32-pin DIP package. Unlike capacitor-backed alternatives, it needs only standard 5 V supply connections and adheres to conventional SRAM timing - enabling direct replacement of volatile memory without redesign.
What is the difference between DS1250AB-100IND and DS1250Y-70IND+?
The DS1250AB-100IND specifies a ±5% VCC operating range (4.75–5.25 V) and write-protection activation at 4.50–4.75 V, whereas DS1250Y-70IND+ supports ±10% (4.5–5.5 V) with write protection at 4.25–4.5 V. Both share identical density, speed (70 ns), and industrial temperature rating. The "100" suffix denotes 100 mil lead spacing; "70" indicates 70 ns speed - functionally identical timing performance.
Can the DS1250AB-100IND be used as a direct replacement for standard 512k × 8 SRAMs?
Yes, the DS1250AB-100IND is designed as a pin- and function-compatible replacement for standard 512k × 8 volatile SRAMs in JEDEC 32-pin DIP footprints. Its address, data, and control pinout (A0–A18, DQ0–DQ7, CE, WE, OE, VCC, GND) matches industry-standard layouts, and it accepts identical read/write timing - allowing board-level upgrades without PCB changes or firmware modification.
Is the DS1250AB-100IND RoHS compliant and lead-free?
Yes, the DS1250AB-100IND is RoHS compliant and lead-free. The "+" suffix in the full orderable part number (e.g., DS1250AB-70IND+) explicitly denotes lead(Pb)-free/RoHS-compliant packaging. This applies to both the 32-pin EDIP package and associated manufacturing processes, meeting EU Directive 2011/65/EU requirements.
DS1250AB-100IND Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 32-DIP Module (0.600", 15.24mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- NVSRAM
- Technology:
- NVSRAM (Non-Volatile SRAM)
- Memory Size:
- 4Mbit
- Memory Organization:
- 512K x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 100ns
- Access Time:
- 100 ns
- Voltage - Supply:
- 4.75V ~ 5.25V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 32-EDIP
DS1250AB-100IND FAQ
1.How can I place an order for DS1250AB-100IND through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1250AB-100IND on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for DS1250AB-100IND reliable?
The price and inventory of DS1250AB-100IND are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS1250AB-100IND is usually 5 days.
3.What payment methods are accepted for DS1250AB-100IND?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1250AB-100IND transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1250AB-100IND?
DS1250AB-100IND orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1250AB-100IND order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for DS1250AB-100IND?
For technical support, including DS1250AB-100IND datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1250AB-100IND requirements.
6.How does Aetrix verify that DS1250AB-100IND is sourced from the original manufacturer or authorized distributors?
All DS1250AB-100IND products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that DS1250AB-100IND meets industry standards.
7.What is the process for return or replacement of DS1250AB-100IND?
All DS1250AB-100IND units undergo pre-shipment inspection (PSI). If there is an issue with DS1250AB-100IND, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The DS1250AB-100IND part is unused and in its original packaging.
Return procedure for DS1250AB-100IND:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DS1250AB-100IND Tags
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