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

Analog Devices Inc./Maxim Integrated DS1230W-150

Name: DS1230W-150
Brand: Analog Devices Inc./Maxim Integrated
SKU: DS1230W-150
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: DS1230W-150

Manufacturer:: Analog Devices Inc./Maxim Integrated

Category:: Memory

Package:: 28-DIP Module (0.600", 15.24mm)

Datasheet:: DS1230W-150.pdf

Description:: IC NVSRAM 256KBIT PAR 28EDIP

Quantity:: RFQ Add To RFQ list

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Product details

Overview

DS1230W-150 from Maxim Integrated is a 3.3V, 256k-bit (32k × 8) nonvolatile static RAM with integrated lithium backup, 100ns access time, write protection triggered at 2.8V, and JEDEC-standard 28-pin DIP packaging. It replaces volatile SRAM, EEPROM, or Flash in real-time clock and configuration memory applications where power loss resilience is critical.

For engineers reviewing the DS1230W-150 datasheet, DS1230W-150 pinout, DS1230W-150 application, or DS1230W-150 equivalent, key selection criteria include guaranteed 10-year data retention without external power, unlimited write cycles, automatic VCC-fail detection and battery switchover, industrial-grade temperature support, and compatibility with legacy 28-pin byte-wide memory sockets.

Technical Context

The DS1230W-150 implements a self-contained nonvolatile architecture combining CMOS SRAM, lithium energy source, and analog voltage-monitoring circuitry. Its control logic continuously monitors VCC and initiates seamless battery switchover when voltage drops below ~2.5V, while unconditionally enabling write protection below 2.8V to prevent corruption.

It operates as a drop-in replacement for standard 32k × 8 SRAMs with identical address/data/control interface timing - supporting tACC = 100ns, tWC = 100ns, and tOE = 50ns - and maintains full functional operation across 3.0V–3.6V supply range with standby current as low as 30µA.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Organization	32,768 words × 8 bits (262,144-bit total), fully static architecture requiring no refresh
Access Time	100ns - enables direct interfacing with 10MHz microcontrollers without wait states
Data Retention	10 years minimum without external power - guaranteed from first VCC application, not shelf life
Write Protection Threshold	2.8V to 3.0V - triggers unconditional write lock before VCC decay compromises data integrity
Supply Voltage Range	3.0V to 3.6V - compatible with 3.3V system rails including ±10% tolerance designs
Operating Temperature	-40°C to +85°C (IND grade) - validated for industrial control and automotive under-hood environments
Standby Current	30µA at VCC–0.2V - minimizes battery drain during extended backup-only operation

Pinout & Package

DS1230W-150 is supplied in a JEDEC-standard 28-pin Extended Dual In-line Package (EDIP), 740-mil width, wave- or hand-solderable only. The package integrates SRAM, lithium cell, and control circuitry in a single hermetically sealed unit.

Pin/Terminal	Circuit Role	Design Meaning
A0–A14	Address Inputs	15-bit address bus supporting full 32k-word addressing; TTL/CMOS-compatible input thresholds
DQ0–DQ7	Data I/O	Bi-directional 8-bit data bus with 2mA drive strength and high-impedance tri-state control
CE	Chip Enable	Active-low chip select; controls device enable and participates in write-cycle timing (tWC, tWR)
WE	Write Enable	Active-low write strobe; determines write start/stop edges with CE; disables outputs during write if OE active
OE	Output Enable	Active-low output enable; governs read-data validity timing (tOE, tCO); must be high during writes to avoid contention
VCC	Power Supply	+3.3V main supply; powers SRAM and control logic; monitored for fail-detect and battery switchover
GND	Ground	Reference return path for all signals and internal circuitry; separate from VBAT ground plane
NC	No Connect	Pins 1, 3, 4, and 33 are unconnected; must remain floating or tied to GND per layout guidelines

Key Features

Feature	Design Value
Lithium freshness seal	Factory-disconnected battery ensures full capacity until first VCC application >3.0V - eliminates shelf-life degradation
Automatic power-fail response	Sub-2.5V VCC switchover occurs within 1.5µs (tPD), ensuring zero-cycle data loss during brownout
Unlimited write endurance	No wear-out mechanism - supports continuous logging or configuration updates without lifetime limitation
Standardized pinout compatibility	Matches both 28-pin 32k×8 SRAM and 28256 EEPROM footprints - enables hardware reuse across memory technologies
Industrial temperature qualification	Full AC/DC specs guaranteed from -40°C to +85°C - validated for extended thermal cycling and long-term reliability

Applications

Real-Time Clock (RTC) Backup Memory	Industrial PLC Configuration Storage
Use Scenario: Maintaining calendar, alarm, and calibration data in battery-backed RTC modules during AC mains failure or system shutdown. IC Role / Device Role / Timing Role: Nonvolatile SRAM providing glitch-free, low-latency read/write access to timekeeping registers while preserving state across indefinite power loss. Use Value: Eliminates need for external battery management ICs or EEPROM write-delay logic - data retention guaranteed for ≥10 years without software intervention.	Use Scenario: Storing ladder logic parameters, I/O mapping, and firmware update staging data in programmable logic controllers deployed in factory automation. IC Role / Device Role / Timing Role: Configuration memory that survives unexpected power interruption during runtime reconfiguration or firmware upload. Use Value: Prevents machine stoppages due to corrupted configuration; supports unlimited field updates without memory wear-out concerns.
Medical Device Event Logging	Avionics Power-Up State Capture
Use Scenario: Recording diagnostic timestamps, sensor fault events, and therapy delivery history in portable infusion pumps and defibrillators. IC Role / Device Role / Timing Role: High-reliability data buffer that retains critical event logs even after battery depletion or accidental disconnection. Use Value: Meets IEC 62304 traceability requirements - each log entry preserved with deterministic retention, no data loss during power transitions.	Use Scenario: Capturing flight control surface positions, sensor offsets, and initialization flags during aircraft power-up sequences prior to avionics self-test completion. IC Role / Device Role / Timing Role: Power-fail resilient memory holding last-known safe state for rapid recovery after transient brownouts on 28V DC bus. Use Value: Reduces pre-flight checklist time by restoring calibrated operational state within milliseconds of stable VCC restoration.

Real-Time Clock (RTC) Backup Memory

Industrial PLC Configuration Storage

Use Scenario: Maintaining calendar, alarm, and calibration data in battery-backed RTC modules during AC mains failure or system shutdown.

IC Role / Device Role / Timing Role: Nonvolatile SRAM providing glitch-free, low-latency read/write access to timekeeping registers while preserving state across indefinite power loss.

Use Value: Eliminates need for external battery management ICs or EEPROM write-delay logic - data retention guaranteed for ≥10 years without software intervention.

Use Scenario: Storing ladder logic parameters, I/O mapping, and firmware update staging data in programmable logic controllers deployed in factory automation.

IC Role / Device Role / Timing Role: Configuration memory that survives unexpected power interruption during runtime reconfiguration or firmware upload.

Use Value: Prevents machine stoppages due to corrupted configuration; supports unlimited field updates without memory wear-out concerns.

Medical Device Event Logging

Avionics Power-Up State Capture

Use Scenario: Recording diagnostic timestamps, sensor fault events, and therapy delivery history in portable infusion pumps and defibrillators.

IC Role / Device Role / Timing Role: High-reliability data buffer that retains critical event logs even after battery depletion or accidental disconnection.

Use Value: Meets IEC 62304 traceability requirements - each log entry preserved with deterministic retention, no data loss during power transitions.

Use Scenario: Capturing flight control surface positions, sensor offsets, and initialization flags during aircraft power-up sequences prior to avionics self-test completion.

IC Role / Device Role / Timing Role: Power-fail resilient memory holding last-known safe state for rapid recovery after transient brownouts on 28V DC bus.

Use Value: Reduces pre-flight checklist time by restoring calibrated operational state within milliseconds of stable VCC restoration.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STK12C68	5V-only supply (4.5V–5.5V); 70ns access time; no built-in lithium - requires external battery and charge-control circuitry	Suitable for legacy 5V systems but adds board-level complexity for backup power management	Select when upgrading existing 5V designs with minimal footprint change and external battery infrastructure already present
DS1248W-100	Same 3.3V supply and 28-pin DIP package; larger 512k-bit (64k×8) density; identical 100ns timing and 10-year retention	Provides double memory capacity without changing socket or timing constraints - ideal for firmware expansion	Choose when future-proofing for increased configuration space or dual-bank logging without redesigning PCB layout

Compared with STK12C68 and DS1248W-100, the DS1230W-150 delivers optimal balance of proven industrial reliability, zero-support-circuitry integration, and precise 256k-bit capacity for cost-sensitive, space-constrained embedded systems requiring guaranteed decade-long data retention.

Availability

DS1230W-150 is available at Aetrix Electronics and suitable for real-time clock backup, industrial PLC configuration storage, medical event logging, and avionics state capture requiring stable component supply and long-term lifecycle assurance.

Supply support for DS1230W-150 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 precision analog, mixed-signal, and power management ICs for industrial, medical, and communications applications.

The DS1230W-150 belongs to Maxim's nonvolatile SRAM product line, engineered to eliminate external battery management and provide deterministic, maintenance-free data retention in mission-critical embedded systems.

FAQ

What is the guaranteed data retention period for DS1230W-150 under battery backup?

The DS1230W-150 guarantees a minimum of 10 years of data retention in the absence of external power, measured cumulatively from the moment VCC is first applied above 3.0V. This specification accounts for self-discharge and aging of the integrated lithium cell, and is validated across the full industrial temperature range (-40°C to +85°C). The DS1230W-150 achieves this through factory-sealed battery activation and precision voltage monitoring circuitry.

Does DS1230W-150 require external support components for nonvolatile operation?

No, the DS1230W-150 requires no external support components for nonvolatile operation. It integrates a lithium energy source, voltage-monitoring circuitry, and power-switching logic into a single 28-pin DIP package. The DS1230W-150 automatically disconnects the battery until first power-up, then manages switchover, write protection, and data retention autonomously - eliminating need for external capacitors, regulators, or battery chargers.

Is DS1230W-150 pin-compatible with standard 32k × 8 SRAMs?

Yes, the DS1230W-150 uses a JEDEC-standard 28-pin DIP footprint and matches the pinout of conventional 32k × 8 volatile SRAMs and 28256 EEPROMs. Its A0–A14, DQ0–DQ7, CE, WE, OE, VCC, and GND assignments align exactly with industry-standard byte-wide memory sockets, enabling direct replacement without PCB modification. The DS1230W-150 maintains identical timing and electrical interface behavior in read/write modes.

What happens to DS1230W-150 during a VCC brownout condition?

During a VCC brownout, the DS1230W-150 detects voltage decay via internal monitoring circuitry and initiates automatic response within 1.5µs: it unconditionally enables write protection, places all outputs in high-impedance state, and switches to lithium backup power when VCC falls below ~2.5V. The DS1230W-150 preserves all stored data without corruption and resumes normal operation once VCC rises above 3.0V, with no software or external intervention required.

Can DS1230W-150 operate in industrial temperature environments?

Yes, the DS1230W-150 is qualified for industrial temperature operation from -40°C to +85°C. All AC and DC electrical specifications - including 100ns access time, 30µA standby current, and 2.8V write-protection threshold - are guaranteed across this full range. The DS1230W-150 undergoes extended thermal cycling validation and is rated for reliable long-term deployment in harsh environments such as factory automation, outdoor metering, and transportation control systems.

DS1230W-150 Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc./Maxim Integrated

Series:: -

Package/Case:: 28-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:: 256Kbit

Memory Organization:: 32K x 8

Memory Interface:: Parallel

Clock Frequency:: -

Write Cycle Time - Word, Page:: 150ns

Access Time:: 150 ns

Voltage - Supply:: 3V ~ 3.6V

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

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: 28-EDIP

DS1230W-150 FAQ

1.How can I place an order for DS1230W-150 through Aetrix?

Please submit a Request for Quotation (RFQ) for DS1230W-150 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 DS1230W-150 reliable?

The price and inventory of DS1230W-150 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS1230W-150 is usually 5 days.

3.What payment methods are accepted for DS1230W-150?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1230W-150 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for DS1230W-150?

DS1230W-150 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your DS1230W-150 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 DS1230W-150?

For technical support, including DS1230W-150 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1230W-150 requirements.

6.How does Aetrix verify that DS1230W-150 is sourced from the original manufacturer or authorized distributors?

All DS1230W-150 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 DS1230W-150 meets industry standards.

7.What is the process for return or replacement of DS1230W-150?

All DS1230W-150 units undergo pre-shipment inspection (PSI). If there is an issue with DS1230W-150, 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 DS1230W-150 part is unused and in its original packaging.

Return procedure for DS1230W-150:

1.Submit a request within 90 days.

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

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