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

Analog Devices Inc./Maxim Integrated DS1250YP-100+

Name: DS1250YP-100+
Brand: Analog Devices Inc./Maxim Integrated
SKU: DS1250YP-100+
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: DS1250YP-100+

Manufacturer:: Analog Devices Inc./Maxim Integrated

Category:: Memory

Package:: 34-PowerCap™ Module

Datasheet:: DS1250YP-100+.pdf

Description:: IC NVSRAM 4MBIT PAR 34PWRCAP

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Product details

Overview

DS1250YP-100+ from Maxim Integrated is a 4,194,304-bit (524,288 × 8) nonvolatile static RAM with integrated lithium backup, JEDEC-standard 34-pin PowerCap Module (PCM) package, ±10% V_CC tolerance (4.5V–5.5V), 10-year data retention, and 70ns read/write access time. It replaces volatile SRAM, EEPROM, or Flash in battery-backed memory systems for industrial controllers and embedded data loggers.

For engineers reviewing the DS1250YP-100+ datasheet, DS1250YP-100+ pinout, DS1250YP-100+ application, or DS1250YP-100+ equivalent, key selection criteria include nonvolatile write endurance, automatic power-fail write protection, PCM surface-mount compatibility, V_CC fail-detect timing (t_PD = 1.5µs), and industrial temperature support (-40°C to +85°C).

Technical Context

The DS1250YP-100+ integrates SRAM, lithium battery switching circuitry, and voltage monitoring logic into a single surface-mountable module base. Its control logic continuously monitors V_CC; when voltage drops below 4.25V (V_TP), it unconditionally enables write protection and switches to battery power at ~3.0V.

It supports standard asynchronous parallel interface timing: t_ACC = 70ns, t_WC = 70ns, t_OE = 35ns, and t_ODW = 25ns. The PCM architecture decouples reflow soldering (module base only) from battery installation (snap-on DS9034PC+ PowerCap), eliminating thermal stress on the lithium cell.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Size	4,194,304 bits (524,288 × 8) - provides byte-wide, fully static RAM capacity matching legacy 512k×8 designs.
Access Time	70 ns - guarantees deterministic read/write latency compatible with 14 MHz bus timing.
V_CC Range	4.5 V to 5.5 V (±10%) - supports wide-input industrial power rails without external regulation.
Data Retention	10 years without external power - enabled by sealed lithium source and automatic V_CC-fail switchover.
Write Cycles	Unlimited - no wear-out mechanism; eliminates EEPROM/Flash endurance management overhead.
Operating Temp	-40°C to +85°C (IND grade) - qualified for extended-temperature industrial and transportation applications.
Package	34-pin PowerCap Module (PCM) - surface-mountable base with keyed snap-on DS9034PC+ battery cap.

Pinout & Package

DS1250YP-100+ uses a 34-pin PowerCap Module (PCM) package: 32 signal pins plus V_BAT and GND dedicated for the snap-on PowerCap. The module base is reflow-soldered first; the DS9034PC+ PowerCap is then mechanically attached post-reflow.

Pin/Terminal	Circuit Role	Design Meaning
A0–A18	Address Inputs	19-bit address bus supporting full 524,288-word addressing; compatible with standard microprocessor address decoding.
DQ0–DQ7	Data I/O	8-bit bidirectional data bus; high-impedance during write cycles when OE is high to prevent bus contention.
CE	Chip Enable	Active-low chip select; initiates read/write when low; combined with WE determines cycle start/stop timing.
WE	Write Enable	Active-low write strobe; falling edge (with CE low) starts write; rising edge terminates write if CE remains low.
OE	Output Enable	Active-low output control; must be high during writes to disable outputs and avoid contention.
V_CC	Power Supply	+5V supply input; monitored for out-of-tolerance condition; triggers automatic battery switchover below ~3.0V.
GND	Ground	Signal and power return reference; separate GND pin provided for clean ground path in PCM layout.
V_BAT	Lithium Backup Terminal	Direct connection point for DS9034PC+ PowerCap battery; electrically isolated until first V_CC application >4.25V.
NC	No Connect	Two pins (1 and 33) are unconnected; no internal bonding or function - must remain floating per design.

Key Features

Feature	Design Value
Automatic Power-Fail Protection	Hardware-level V_CC monitoring triggers unconditional write protection and battery switchover within 1.5µs (t_PD) - prevents corruption during brownout or shutdown.
Freshness Seal	Lithium energy source remains electrically disconnected until first V_CC application >4.25V - preserves full 10-year retention capacity from shipment.
PCM Surface-Mount Architecture	Module base withstands 260°C reflow; DS9034PC+ PowerCap snaps on post-assembly - eliminates battery thermal damage risk.
Standardized Pinout	Compatible with Maxim's full NV SRAM family pin mapping - simplifies migration across density and voltage variants.
Zero External Support Circuitry	Self-contained control logic requires no external capacitors, regulators, or supervisors - reduces BOM count and layout area.

Applications

Industrial Data Logger	Programmable Logic Controller (PLC)
Use Scenario: Continuous acquisition of sensor readings (temperature, pressure, flow) with periodic storage to nonvolatile memory during mains power loss. IC Role / Device Role / Timing Role: Primary data buffer and retention store; retains last valid dataset during unexpected AC failure. Use Value: Ensures zero data loss across 10-year field deployment without battery replacement or firmware wear-leveling.	Use Scenario: Storing ladder logic state, I/O configuration, and runtime variables in factory automation systems subject to frequent power cycling. IC Role / Device Role / Timing Role: Nonvolatile working memory holding critical control state between power cycles and firmware updates. Use Value: Eliminates boot-time initialization delays and guarantees deterministic startup behavior after brownouts.
Medical Diagnostic Equipment	Railway Signaling Controller
Use Scenario: Capturing real-time ECG waveforms or imaging metadata during diagnostic procedures where power interruption must not erase session data. IC Role / Device Role / Timing Role: High-reliability scratchpad memory with sub-microsecond failover - maintains waveform continuity during brief AC dips. Use Value: Meets IEC 62304 Class C software safety requirements via hardware-enforced data integrity.	Use Scenario: Storing interlocking logic tables and event logs in wayside signaling units operating in harsh outdoor environments (-40°C to +85°C). IC Role / Device Role / Timing Role: Temperature-hardened nonvolatile memory enabling fail-safe operation without external backup power infrastructure. Use Value: Reduces system complexity by replacing battery-backed supercapacitor banks and associated charging circuits.

Industrial Data Logger

Programmable Logic Controller (PLC)

Use Scenario: Continuous acquisition of sensor readings (temperature, pressure, flow) with periodic storage to nonvolatile memory during mains power loss.

IC Role / Device Role / Timing Role: Primary data buffer and retention store; retains last valid dataset during unexpected AC failure.

Use Value: Ensures zero data loss across 10-year field deployment without battery replacement or firmware wear-leveling.

Use Scenario: Storing ladder logic state, I/O configuration, and runtime variables in factory automation systems subject to frequent power cycling.

IC Role / Device Role / Timing Role: Nonvolatile working memory holding critical control state between power cycles and firmware updates.

Use Value: Eliminates boot-time initialization delays and guarantees deterministic startup behavior after brownouts.

Medical Diagnostic Equipment

Railway Signaling Controller

Use Scenario: Capturing real-time ECG waveforms or imaging metadata during diagnostic procedures where power interruption must not erase session data.

IC Role / Device Role / Timing Role: High-reliability scratchpad memory with sub-microsecond failover - maintains waveform continuity during brief AC dips.

Use Value: Meets IEC 62304 Class C software safety requirements via hardware-enforced data integrity.

Use Scenario: Storing interlocking logic tables and event logs in wayside signaling units operating in harsh outdoor environments (-40°C to +85°C).

IC Role / Device Role / Timing Role: Temperature-hardened nonvolatile memory enabling fail-safe operation without external backup power infrastructure.

Use Value: Reduces system complexity by replacing battery-backed supercapacitor banks and associated charging circuits.

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+	Same 32-pin EDIP package; identical V_CC range (±10%), retention, and speed; lacks PCM modularity.	Requires through-hole mounting and integrated battery; unsuitable for high-volume SMT production.	Select for legacy board upgrades where DIP footprint exists and reflow compatibility is not required.
STK15C88-55I	512k × 8 NV SRAM; 55ns access; 32-pin DIP; ±10% V_CC; 10-year retention; no PCM option.	Lower density (4 Mbit vs. 4 Mbit - same bit count but different organization); no surface-mount module variant available.	Select when cost sensitivity outweighs modularity needs and existing DIP socket infrastructure is retained.

Compared with DS1250Y-70IND+, DS1250YP-100+ enables automated SMT assembly and field-replaceable battery service; compared with STK15C88-55I, it offers identical density and retention but adds PCM-based thermal safety and mechanical serviceability.

Availability

DS1250YP-100+ is available at Aetrix Electronics and suitable for industrial data loggers, programmable logic controllers, medical diagnostic equipment, and railway signaling controllers requiring stable component supply across extended product lifecycles.

Supply support for DS1250YP-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 industrial, automotive, and communications markets.

The DS1250YP-100+ belongs to Maxim's nonvolatile SRAM product line, engineered specifically for applications demanding guaranteed data retention during unpredictable power loss without firmware intervention or external supervision.

FAQ

What is the guaranteed data retention period for DS1250YP-100+ under zero-power conditions?

The DS1250YP-100+ guarantees 10 years of data retention in the absence of external power. This specification is assured by component selection, process control, and design-not measured per unit-and begins accumulating from the moment V_CC is first applied above 4.25V. The lithium energy source remains disconnected until that initial power-up, preserving full capacity.

Does DS1250YP-100+ require external circuitry for battery management or power-fail detection?

No, DS1250YP-100+ requires no external circuitry. Its integrated control logic continuously monitors V_CC, automatically enabling write protection and switching to lithium backup when voltage falls below ~3.0V. The DS1250YP-100+ also features a freshness seal that keeps the lithium source inactive until first V_CC application.

What PowerCap is required for DS1250YP-100+ operation?

The DS1250YP-100+ requires either the DS9034PC+ or DS9034PCI+ PowerCap, which must be ordered separately and snapped onto the module base after reflow soldering. These PowerCaps provide the lithium backup battery and are keyed to prevent improper attachment. DS1250YP-100+ cannot operate without one of these specified PowerCaps.

How does DS1250YP-100+ differ from DS1250Y-70IND+ in terms of packaging and assembly?

DS1250YP-100+ uses a 34-pin PowerCap Module (PCM) package designed for surface-mount reflow, while DS1250Y-70IND+ uses a 32-pin extended DIP (EDIP). The DS1250YP-100+ module base is soldered first; the DS9034PC+ PowerCap is then snapped on mechanically-avoiding lithium exposure to reflow heat. DS1250Y-70IND+ integrates the battery directly and requires through-hole or wave soldering.

Is DS1250YP-100+ RoHS-compliant and lead-free?

Yes, DS1250YP-100+ is RoHS-compliant and lead-free, as indicated by the "+" suffix in the part number. It meets EU Directive 2011/65/EU requirements and is qualified for use in environmentally regulated industrial and medical applications.

DS1250YP-100+ Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc./Maxim Integrated

Series:: -

Package/Case:: 34-PowerCap™ Module

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:: Surface Mount

Supplier Device Package:: 34-PowerCap Module

DS1250YP-100+ FAQ

1.How can I place an order for DS1250YP-100+ through Aetrix?

Please submit a Request for Quotation (RFQ) for DS1250YP-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 DS1250YP-100+ reliable?

The price and inventory of DS1250YP-100+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS1250YP-100+ is usually 5 days.

3.What payment methods are accepted for DS1250YP-100+?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1250YP-100+ transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for DS1250YP-100+?

DS1250YP-100+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your DS1250YP-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 DS1250YP-100+?

For technical support, including DS1250YP-100+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1250YP-100+ requirements.

6.How does Aetrix verify that DS1250YP-100+ is sourced from the original manufacturer or authorized distributors?

All DS1250YP-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 DS1250YP-100+ meets industry standards.

7.What is the process for return or replacement of DS1250YP-100+?

All DS1250YP-100+ units undergo pre-shipment inspection (PSI). If there is an issue with DS1250YP-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 DS1250YP-100+ part is unused and in its original packaging.

Return procedure for DS1250YP-100+:

1.Submit a request within 90 days.

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

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