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

Analog Devices Inc./Maxim Integrated DS1258Y-100#

Name: DS1258Y-100#
Brand: Analog Devices Inc./Maxim Integrated
SKU: DS1258Y-100#
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: DS1258Y-100#

Manufacturer:: Analog Devices Inc./Maxim Integrated

Category:: Memory

Package:: 40-DIP Module (0.610", 15.495mm)

Datasheet:: DS1258Y-100#.pdf

Description:: IC NVSRAM 2MBIT PARALLEL 40EDIP

Quantity:: RFQ Add To RFQ list

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Inventory:4,366

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Product details

Overview

DS1258Y-100# from Maxim Integrated (now Analog Devices) is a 128k × 16-bit nonvolatile SRAM with integrated lithium battery backup, 10-year data retention, 100 ns access time, and 5 V ±10% supply operation. It functions as a drop-in NV memory replacement in industrial control systems requiring persistent RAM without external support circuitry.

For engineers reviewing the DS1258Y-100# datasheet, DS1258Y-100# pinout, DS1258Y-100# application, or DS1258Y-100# equivalent, key selection factors include write-protection threshold (4.25 V), byte-select capability via CEU/CEL, industrial-grade temperature option, and 40-pin 740-mil extended DIP package compatibility.

Technical Context

The DS1258Y-100# implements autonomous power-fail detection using internal voltage monitoring that triggers seamless lithium source activation below ~3.0 V, enabling uninterrupted data retention. Its dual chip-enable architecture (CEU/CEL) enables independent upper- and lower-byte access without external logic.

It operates in three distinct modes: normal read/write (VCC ≥ 4.5 V), automatic write-protect (VCC < 4.25 V), and battery-backed retention (VCC < 3.0 V). All address and data lines remain high-impedance during power-down, eliminating bus contention risks.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Organization	131,072 × 16-bit (128k × 16); supports full-word or byte-select access
Access Time	100 ns max; defines minimum cycle time for reliable microprocessor interfacing
Supply Voltage Range	4.5 V to 5.5 V; accommodates wider tolerance than AB variant (±10% vs ±5%)
Write Protection Threshold	4.25 V min; initiates automatic hardware write lock before data corruption risk
Data Retention	10 years minimum without external power; guaranteed by sealed lithium cell and low-leakage design
Operating Temperature	0°C to +70°C standard; IND version extends to –40°C to +85°C
Package	40-pin, 740-mil extended DIP; compatible with legacy through-hole PCB layouts

Pinout & Package

DS1258Y-100# uses a 40-pin 740-mil extended dual in-line package (DIP) with 0.100" row spacing and 0.300" body width. Pin 1 is marked by notch or dot; pins are arranged in two parallel rows of 20.

Pin/Terminal	Circuit Role	Design Meaning
A0–A16	Address Inputs	17-bit address bus; selects one of 131,072 words (2¹⁷)
DQ0–DQ15	Data I/O	16-bit bidirectional data bus; supports full-word or byte-wide transfers
CEU / CEL	Chip Enable (Upper/Lower Byte)	Independent enable controls for DQ8–DQ15 and DQ0–DQ7; eliminates need for external byte-select logic
WE	Write Enable	Active-low signal initiating write cycle; output drivers disabled during write to prevent contention
OE	Output Enable	Active-low control for data outputs; high during write to maintain high-Z state
VCC / GND	Power / Ground	+5 V supply and reference; internal voltage monitor derives write-protect and battery-switching thresholds

Key Features

Feature	Design Value
Integrated lithium energy source	Fully sealed and electrically disconnected until first power-up, preserving 100% capacity for full 10-year retention life
Automatic power-fail response	Monitors VCC continuously; switches to battery and locks writes within microseconds when voltage drops below 4.25 V
Byte-select architecture	Dual CEU/CEL inputs enable true 8-bit access granularity without external gating or address decoding
No external support circuitry required	Self-contained control logic eliminates need for external supervisors, backup capacitors, or write-protect latches
High noise immunity	Input thresholds (VIH = 2.2 V, VIL = 0.8 V) ensure robust TTL/CMOS compatibility across voltage and temperature

Applications

Industrial PLC Memory	Medical Device Configuration Storage
Use Scenario: Storing runtime parameters and calibration data in programmable logic controllers where mains power interruption is common. IC Role / Device Role / Timing Role: Nonvolatile SRAM providing immediate-access, battery-backed memory with zero software overhead. Use Value: Eliminates boot-time configuration reload and prevents loss of operational state during brownouts.	Use Scenario: Retaining patient-specific therapy settings and device calibration in portable infusion pumps and diagnostic monitors. IC Role / Device Role / Timing Role: Primary nonvolatile storage for critical setup data with deterministic 100 ns access during active treatment cycles. Use Value: Ensures regulatory-compliant data persistence without reliance on firmware-managed EEPROM wear leveling.
Avionics Data Logging Buffer	Test Equipment Firmware Parameter Cache
Use Scenario: Capturing flight sensor snapshots in black-box recorders where power may be lost abruptly during fault conditions. IC Role / Device Role / Timing Role: High-speed, self-protecting memory buffer that preserves last-valid data upon voltage collapse. Use Value: Guarantees integrity of final pre-failure telemetry without external voltage-monitoring ICs or delay circuits.	Use Scenario: Caching instrument calibration coefficients and user-defined test sequences in automated bench testers. IC Role / Device Role / Timing Role: Low-latency, wear-free parameter store accessed repeatedly during test execution loops. Use Value: Avoids EEPROM endurance limits and write latency bottlenecks while maintaining data across power cycles.

Industrial PLC Memory

Medical Device Configuration Storage

Use Scenario: Storing runtime parameters and calibration data in programmable logic controllers where mains power interruption is common.

IC Role / Device Role / Timing Role: Nonvolatile SRAM providing immediate-access, battery-backed memory with zero software overhead.

Use Value: Eliminates boot-time configuration reload and prevents loss of operational state during brownouts.

Use Scenario: Retaining patient-specific therapy settings and device calibration in portable infusion pumps and diagnostic monitors.

IC Role / Device Role / Timing Role: Primary nonvolatile storage for critical setup data with deterministic 100 ns access during active treatment cycles.

Use Value: Ensures regulatory-compliant data persistence without reliance on firmware-managed EEPROM wear leveling.

Avionics Data Logging Buffer

Test Equipment Firmware Parameter Cache

Use Scenario: Capturing flight sensor snapshots in black-box recorders where power may be lost abruptly during fault conditions.

IC Role / Device Role / Timing Role: High-speed, self-protecting memory buffer that preserves last-valid data upon voltage collapse.

Use Value: Guarantees integrity of final pre-failure telemetry without external voltage-monitoring ICs or delay circuits.

Use Scenario: Caching instrument calibration coefficients and user-defined test sequences in automated bench testers.

IC Role / Device Role / Timing Role: Low-latency, wear-free parameter store accessed repeatedly during test execution loops.

Use Value: Avoids EEPROM endurance limits and write latency bottlenecks while maintaining data across power cycles.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
DS1258AB-100#	Tighter VCC tolerance (±5% vs ±10%); higher write-protection threshold (4.50 V vs 4.25 V)	Better suited for stable 5 V rails; less tolerant of voltage sag during brownout transitions	Select DS1258AB-100# only if system VCC regulation meets ±5% spec and brownout duration is short
STK12C68-AW50I	Same 128k×16 organization but 50 ns access; uses external capacitor for backup instead of integrated lithium	Requires external 0.47 F tantalum capacitor and supervisor IC; shorter retention (typically 5 years)	Choose STK12C68-AW50I only when long-term lithium maintenance is prohibited or RoHS battery restrictions apply

Compared with DS1258AB-100# and STK12C68-AW50I, the DS1258Y-100# provides optimal balance of voltage margin, autonomous protection timing, and maintenance-free 10-year retention-making it preferred for unattended industrial and medical systems where reliability outweighs raw speed.

Availability

DS1258Y-100# is available at Aetrix Electronics and suitable for industrial PLCs, medical instrumentation, avionics data loggers, and automated test equipment requiring stable component supply and long-term lifecycle assurance.

Supply support for DS1258Y-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 (acquired by Analog Devices in 2021) designs precision analog, mixed-signal, and nonvolatile memory solutions for demanding industrial, medical, and automotive applications.

The DS1258Y-100# belongs to Maxim's legacy nonvolatile SRAM product line, engineered specifically to replace discrete NV memory subsystems with single-chip reliability, eliminating external battery management and write-protection logic.

FAQ

What is the guaranteed data retention period for DS1258Y-100#?

The DS1258Y-100# guarantees a minimum 10-year data retention period in the absence of external power, measured from the time VCC is first applied. This is ensured by factory-sealed lithium energy source and low-leakage CMOS design-no periodic refresh or external conditioning is required during retention.

Does DS1258Y-100# require external components to function as nonvolatile memory?

No, the DS1258Y-100# requires no external components to deliver full nonvolatile functionality. Its integrated lithium cell, voltage monitor, and automatic power-switching circuit eliminate the need for backup capacitors, supervisors, or write-protect latches-only VCC, GND, address, data, and control signals are needed.

How does DS1258Y-100# handle partial power failure or brownout conditions?

When VCC falls below 4.25 V, the DS1258Y-100# immediately disables writes and places all I/O pins in high-impedance state. At ~3.0 V, it seamlessly switches to lithium power and maintains data integrity-no software intervention or external detection circuitry is required.

Can DS1258Y-100# be used interchangeably with DS1258AB-100# on the same PCB?

Yes, DS1258Y-100# and DS1258AB-100# share identical pinout, package, timing, and logic interface-but differ in VCC tolerance (±10% vs ±5%) and write-protection threshold (4.25 V vs 4.50 V). Swapping requires verification that system VCC remains ≥4.5 V under worst-case conditions.

Is DS1258Y-100# RoHS compliant and lead-free?

Yes, DS1258Y-100# is RoHS compliant and lead-free, as indicated by the "#" suffix in the part number per Maxim's ordering nomenclature. It meets EU Directive 2011/65/EU and subsequent amendments, including exemption 7a for lead in high-melting-temperature type solders.

DS1258Y-100# Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc./Maxim Integrated

Series:: -

Package/Case:: 40-DIP Module (0.610", 15.495mm)

Packaging:: Box

Product Status:: Obsolete

Programmable:: Not Verified

Memory Type:: Non-Volatile

Memory Format:: NVSRAM

Technology:: NVSRAM (Non-Volatile SRAM)

Memory Size:: 2Mbit

Memory Organization:: 128K x 16

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:: 40-EDIP

DS1258Y-100# FAQ

1.How can I place an order for DS1258Y-100# through Aetrix?

Please submit a Request for Quotation (RFQ) for DS1258Y-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 DS1258Y-100# reliable?

The price and inventory of DS1258Y-100# are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS1258Y-100# is usually 5 days.

3.What payment methods are accepted for DS1258Y-100#?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1258Y-100# transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for DS1258Y-100#?

DS1258Y-100# orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your DS1258Y-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 DS1258Y-100#?

For technical support, including DS1258Y-100# datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1258Y-100# requirements.

6.How does Aetrix verify that DS1258Y-100# is sourced from the original manufacturer or authorized distributors?

All DS1258Y-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 DS1258Y-100# meets industry standards.

7.What is the process for return or replacement of DS1258Y-100#?

All DS1258Y-100# units undergo pre-shipment inspection (PSI). If there is an issue with DS1258Y-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 DS1258Y-100# part is unused and in its original packaging.

Return procedure for DS1258Y-100#:

1.Submit a request within 90 days.

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

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