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Home > Products > Integrated Circuits (ICs) > Memory > Memory

Analog Devices Inc./Maxim Integrated DS1250Y-100

Name: DS1250Y-100
Brand: Analog Devices Inc./Maxim Integrated
SKU: DS1250Y-100
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: DS1250Y-100

Manufacturer:: Analog Devices Inc./Maxim Integrated

Category:: Memory

Package:: 32-DIP Module (0.600", 15.24mm)

Datasheet:: DS1250Y-100.pdf

Description:: IC NVSRAM 4MBIT PARALLEL 32EDIP

Quantity:: RFQ Add To RFQ list

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Inventory:4,189

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Product details

Overview

DS1250Y-100 from Maxim Integrated is a 4,194,304-bit (524,288 × 8) nonvolatile static RAM with integrated lithium backup, JEDEC-standard 32-pin DIP package, ±10% V_CC operating range (4.5V–5.5V), and 70ns read/write access time. It replaces volatile SRAM, EEPROM, or Flash in battery-critical industrial data loggers requiring automatic power-loss write protection and 10-year data retention.

For engineers reviewing the DS1250Y-100 datasheet, DS1250Y-100 pinout, DS1250Y-100 application, or DS1250Y-100 equivalent, key selection criteria include its self-contained lithium energy source, V_TP = 4.25V write-protection threshold, 32-pin EDIP mechanical compatibility, and absence of external support circuitry for microprocessor interfacing.

Technical Context

The DS1250Y-100 implements autonomous power-fail detection using internal voltage monitoring that triggers unconditional write protection when V_CC drops below 4.25V and switches to lithium backup at ~3.0V. Its control logic enforces high-impedance outputs and "don't care" inputs during data retention mode.

It supports standard asynchronous SRAM timing: t_ACC = 70ns, t_RC = 70ns, t_WP = 55ns, with CE/WE/OE dual-edge-controlled read and write cycles. The device requires no external capacitors, regulators, or reset generators - all nonvolatile management is fully integrated.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Size	4,194,304 bits (524,288 × 8) - byte-wide interface compatible with legacy 512k×8 SRAM sockets
Access Time	70 ns - enables direct replacement of 70ns static RAMs without timing redesign
V_CC Range	4.5V to 5.5V (±10%) - supports wide-input industrial power rails without regulation
Write Protection Threshold	V_TP = 4.25V (min) - initiates automatic data safeguarding before brownout corruption occurs
Data Retention	10 years minimum without external power - guaranteed by sealed lithium cell and low-ICC_S2 (50–150 µA)
Operating Temperature	0°C to +70°C (Commercial) - validated across full range with no derating required
Package	32-pin 740-mil Extended DIP (EDIP) - JEDEC-standard footprint, wave-solderable, no reflow exposure

Pinout & Package

DS1250Y-100 uses a JEDEC-standard 32-pin 740-mil Extended DIP (EDIP) package. The lithium energy source is internally sealed and electrically disconnected until first V_CC application ≥4.25V, preserving full battery capacity.

Pin/Terminal	Circuit Role	Design Meaning
A0–A18	Address Inputs	19-bit address bus supporting full 524,288-word decoding; no address latching required
DQ0–DQ7	Data I/O	Bidirectional 8-bit data bus with TTL-compatible levels and 2mA drive capability
CE	Chip Enable	Active-low chip select; controls device enable and write-cycle initiation timing (t_CO, t_WC)
WE	Write Enable	Active-low write strobe; determines write start/stop edges with CE (t_WP, t_WR)
OE	Output Enable	Active-low output control; enables data drivers only during reads (t_OE, t_OD)
V_CC	Power Supply	+5V supply input; powers SRAM core and control logic; monitored for V_TP detection
GND	Ground	Reference return path for all signals and internal switching circuits
NC	No Connect	Pins 1 and 32 are unconnected; no internal bonding or routing

Key Features

Feature	Design Value
Self-contained lithium backup	Integrated battery and power-switching circuit eliminate external backup components and PCB space
Automatic write protection	Hardware-enforced disable of writes at V_CC ≤ 4.25V prevents partial writes and data corruption
Unlimited write cycles	No endurance limit on SRAM core - supports continuous logging or frequent configuration updates
Freshness seal	Lithium source remains electrically isolated until first power-up, ensuring full 10-year retention budget
Standard DIP compatibility	Pin-for-pin match with 32-pin 512k×8 SRAMs enables drop-in upgrade without layout change

Applications

Industrial Data Logger	Medical Device Memory
Use Scenario: Continuous acquisition of sensor readings in remote environmental monitors with infrequent maintenance. IC Role / Device Role / Timing Role: Nonvolatile SRAM storing timestamped measurements during mains failure or battery depletion. Use Value: Guarantees 10-year data integrity without periodic refresh or external EEPROM wear leveling.	Use Scenario: Storing calibration coefficients and patient session history in portable diagnostic equipment. IC Role / Device Role / Timing Role: Fail-safe memory holding critical settings across unexpected shutdowns during clinical use. Use Value: Eliminates risk of corrupted calibration due to sub-4.25V brownouts during battery swaps.
Telecom Base Station Controller	Avionics Black Box Recorder
Use Scenario: Caching configuration tables and fault logs in carrier-grade network edge devices. IC Role / Device Role / Timing Role: High-speed, byte-accessible storage retaining operational state during AC loss or hot-swap events. Use Value: Enables sub-70ns read/write performance while maintaining data through multi-second power gaps.	Use Scenario: Recording flight parameters in commercial aircraft where EMI and thermal cycling demand robust retention. IC Role / Device Role / Timing Role: Mission-critical memory preserving last 25 hours of telemetry even after crash-induced power loss. Use Value: Meets DO-160 Section 22 lightning-induced transient immunity via hardware-level write lockout.

Industrial Data Logger

Medical Device Memory

Use Scenario: Continuous acquisition of sensor readings in remote environmental monitors with infrequent maintenance.

IC Role / Device Role / Timing Role: Nonvolatile SRAM storing timestamped measurements during mains failure or battery depletion.

Use Value: Guarantees 10-year data integrity without periodic refresh or external EEPROM wear leveling.

Use Scenario: Storing calibration coefficients and patient session history in portable diagnostic equipment.

IC Role / Device Role / Timing Role: Fail-safe memory holding critical settings across unexpected shutdowns during clinical use.

Use Value: Eliminates risk of corrupted calibration due to sub-4.25V brownouts during battery swaps.

Telecom Base Station Controller

Avionics Black Box Recorder

Use Scenario: Caching configuration tables and fault logs in carrier-grade network edge devices.

IC Role / Device Role / Timing Role: High-speed, byte-accessible storage retaining operational state during AC loss or hot-swap events.

Use Value: Enables sub-70ns read/write performance while maintaining data through multi-second power gaps.

Use Scenario: Recording flight parameters in commercial aircraft where EMI and thermal cycling demand robust retention.

IC Role / Device Role / Timing Role: Mission-critical memory preserving last 25 hours of telemetry even after crash-induced power loss.

Use Value: Meets DO-160 Section 22 lightning-induced transient immunity via hardware-level write lockout.

Equivalent & Alternatives

The following parts are listed as comparable options for similar nonvolatile SRAM applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
DS1250AB-70+	Narrower V_CC tolerance (±5%, 4.75–5.25V); higher V_TP = 4.50V; identical pinout and timing	Better suited for regulated 5V systems where tighter supply stability is guaranteed	Select DS1250AB-70+ when system V_CC variation is controlled within ±5% and higher write-protection margin is preferred
STK14CA8-70I	Same density and 70ns speed but uses external capacitor-based backup; no integrated lithium; 32-pin SOJ package	Requires external 0.47F capacitor and charge circuit; not suitable for space-constrained DIP footprints	Choose STK14CA8-70I only if lithium-free design is mandated and board area allows capacitor placement

Compared with DS1250AB-70+, the DS1250Y-100 offers wider supply tolerance for unregulated environments, while STK14CA8-70I trades integrated reliability for regulatory flexibility - making DS1250Y-100 optimal for field-deployed equipment needing zero-support-component fail-safe memory.

Availability

DS1250Y-100 is available at Aetrix Electronics and suitable for industrial data loggers, medical diagnostic instruments, and telecom base station controllers requiring stable component supply, long-lifecycle assurance, and RoHS-compliant packaging.

Supply support for DS1250Y-100 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) designs precision analog, mixed-signal, and nonvolatile memory solutions for demanding industrial, medical, and communications applications.

The DS1250Y-100 belongs to Maxim's nonvolatile SRAM product line, engineered specifically to replace battery-backed volatile memory in systems where data integrity during unpredictable power loss is mission-critical.

FAQ

What is the guaranteed data retention period for the DS1250Y-100?

The DS1250Y-100 guarantees a minimum 10-year data retention period in the absence of external power, measured from the time V_CC is first applied ≥4.25V. This specification is assured by component selection, process control, and internal lithium cell design - not extrapolated or estimated. The DS1250Y-100 achieves this without external capacitors or refresh circuitry.

Does the DS1250Y-100 require external support components for nonvolatile operation?

No, the DS1250Y-100 requires no external support components. Its integrated lithium energy source, voltage-monitoring circuitry, and automatic power-switching logic are fully contained within the 32-pin EDIP package. The DS1250Y-100 operates as a drop-in replacement for standard 512k×8 SRAMs with no additional regulators, capacitors, or control ICs needed.

What is the write-protection trigger voltage for the DS1250Y-100?

The DS1250Y-100 initiates unconditional write protection when V_CC falls to 4.25V (minimum), per its specified V_TP parameter. At this threshold, all inputs become "don't care," outputs go high-impedance, and the lithium source engages at ~3.0V. This behavior is hardwired and does not rely on firmware or external supervision - a core feature of the DS1250Y-100.

Is the DS1250Y-100 compatible with standard 32-pin DIP sockets designed for 512k×8 SRAMs?

Yes, the DS1250Y-100 uses a JEDEC-standard 32-pin 740-mil Extended DIP (EDIP) package with identical pinout and mechanical dimensions to legacy 512k×8 SRAMs. Its A0–A18, DQ0–DQ7, CE, WE, OE, V_CC, and GND assignments match industry-standard byte-wide SRAM interfaces - enabling true socket-level replacement without PCB modification.

How does the DS1250Y-100 handle power-up sequencing and stabilization?

During power-up, the DS1250Y-100 waits until V_CC exceeds ~3.0V to reconnect external supply and disconnect lithium backup; full functional operation resumes only after V_CC exceeds 4.5V. The DS1250Y-100 includes t_PU = 2ms delay from V_CC validity to CE/WE deactivation, ensuring stable initialization before accepting commands.

DS1250Y-100 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:: 4.5V ~ 5.5V

Operating Temperature:: 0°C ~ 70°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: 32-EDIP

DS1250Y-100 FAQ

1.How can I place an order for DS1250Y-100 through Aetrix?

Please submit a Request for Quotation (RFQ) for DS1250Y-100 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 DS1250Y-100 reliable?

The price and inventory of DS1250Y-100 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS1250Y-100 is usually 5 days.

3.What payment methods are accepted for DS1250Y-100?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1250Y-100 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for DS1250Y-100?

DS1250Y-100 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your DS1250Y-100 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 DS1250Y-100?

For technical support, including DS1250Y-100 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1250Y-100 requirements.

6.How does Aetrix verify that DS1250Y-100 is sourced from the original manufacturer or authorized distributors?

All DS1250Y-100 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 DS1250Y-100 meets industry standards.

7.What is the process for return or replacement of DS1250Y-100?

All DS1250Y-100 units undergo pre-shipment inspection (PSI). If there is an issue with DS1250Y-100, 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 DS1250Y-100 part is unused and in its original packaging.

Return procedure for DS1250Y-100:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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