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Analog Devices Inc./Maxim Integrated DS1230W-100
- Part No.:
- DS1230W-100
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Memory
- Package:
- 28-DIP Module (0.600", 15.24mm)
- Datasheet:
-
DS1230W-100.pdf
- Description:
- IC NVSRAM 256KBIT PAR 28EDIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,641
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Product details
Overview
DS1230W-100 from Maxim Integrated is a 3.3V, 256k-bit (32k × 8) nonvolatile static RAM with lithium backup, 100ns access time, industrial temperature rating (–40°C to +85°C), and JEDEC-standard 28-pin DIP package. It replaces volatile SRAM, EEPROM, or Flash in battery-backed memory applications requiring data retention during power loss.
For engineers reviewing the DS1230W-100 datasheet, DS1230W-100 pinout, DS1230W-100 application, or DS1230W-100 equivalent, key selection criteria include guaranteed 10-year data retention without external power, automatic write protection at VCC < 2.8V, unlimited write cycles, low-power CMOS operation, and compatibility with standard 28-pin byte-wide memory sockets.
Technical Context
The DS1230W-100 integrates SRAM, lithium battery, and voltage-monitoring control circuitry into a single monolithic module. Its internal power-switching logic detects VCC decay below ~2.5V and seamlessly transfers RAM supply to the lithium source while enabling unconditional write protection.
It operates as a drop-in replacement for 32k × 8 volatile SRAMs and matches the pinout of 28256 EEPROMs. Read/write timing is fully compatible with standard microprocessor buses: tACC = tRC = tWC = 100ns, with tOE = 50ns and tCO = 100ns under VCC = 3.3V ±0.3V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 32,768 words × 8 bits (262,144-bit NV SRAM) |
| Access Time | 100ns - meets high-speed microprocessor bus timing without wait states |
| Data Retention | 10 years minimum without external power - enabled by sealed lithium source and freshness seal |
| Write Protection Threshold | VTP = 2.8V to 3.0V - triggers automatic write disable before VCC drops to unsafe levels |
| Operating Voltage | VCC = 3.0V to 3.6V - supports 3.3V systems with ±10% tolerance |
| Temperature Range | –40°C to +85°C (IND grade) - qualified for industrial embedded control and instrumentation |
| Standby Current | ICCS2 = 30µA to 150µA at CE = VCC–0.2V - enables ultra-low-power retention mode |
Pinout & Package
DS1230W-100 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 battery, and control circuitry in one 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 inputs |
| DQ0–DQ7 | Data I/O | Bi-directional 8-bit data bus with 2mA drive capability and 35ns high-Z transition |
| CE | Chip Enable | Active-low chip select; controls device enable and write protection activation timing |
| WE | Write Enable | Active-low write strobe; determines write cycle start/stop with CE per tWP and tWR specs |
| OE | Output Enable | Active-low output control; enables data drivers during read, high-Z when inactive |
| VCC | Power Supply | +3.3V primary supply; powers SRAM and control logic; disconnects lithium source above 2.5V |
| GND | Ground | Reference return path for all signals and internal battery switching circuitry |
| NC | No Connect | Pins 1, 3, 4, and 33 are unconnected; no internal bonding or function |
Key Features
| Feature | Design Value |
|---|---|
| Automatic Power-Fail Response | Switches to lithium backup in ≤1.5µs (tPD) when VCC falls below VTP; prevents data corruption |
| Freshness Seal | Lithium source electrically disconnected until first VCC application >3.0V - guarantees full 10-year retention capacity |
| Unlimited Write Cycles | No endurance limit - eliminates wear-leveling firmware and write-cycle management overhead |
| Standard Pin Compatibility | Matches 28-pin DIP SRAM and 28256 EEPROM footprints - enables direct socket replacement without PCB change |
| Low-Power Retention | ICCS2 ≤150µA at VCC = 3.1V - supports long-term battery-backed storage in energy-constrained systems |
Applications
| Industrial Data Logger | Medical Device Configuration Storage |
|---|---|
|
Use Scenario: Continuous acquisition of sensor readings in remote field equipment with intermittent power. IC Role / Device Role / Timing Role: Nonvolatile memory storing timestamped operational logs and calibration coefficients between power cycles. Use Value: Guarantees 10-year data integrity without external battery management circuitry or firmware intervention. |
Use Scenario: Storing patient-specific therapy parameters and device calibration history in portable diagnostic instruments. IC Role / Device Role / Timing Role: Secure, tamper-resistant configuration memory that retains settings across sterilization cycles and battery replacements. Use Value: Eliminates EEPROM write delays and endurance concerns while meeting IEC 62304 Class B software safety requirements. |
| Programmable Logic Controller (PLC) State Backup | Avionics Black Box Memory Buffer |
|
Use Scenario: Preserving ladder logic execution state and I/O mapping during unexpected AC mains failure. IC Role / Device Role / Timing Role: Real-time memory buffer mirroring volatile RAM contents during brownout events. Use Value: Enables deterministic recovery within 100ns access window and zero write-cycle degradation over 20+ years of service life. |
Use Scenario: Capturing flight-critical telemetry snapshots prior to emergency power shutdown in unmanned aerial systems. IC Role / Device Role / Timing Role: High-reliability, radiation-tolerant memory buffer with sub-microsecond failover latency. Use Value: Meets DO-160 Section 22 lightning-induced transient immunity via integrated VCC monitoring and autonomous write protect. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar nonvolatile SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STK12C68-5 | 5V-only operation; 55ns access time; 10-year retention; 28-pin DIP; no freshness seal | Requires 5V system integration; lacks 3.3V compatibility and industrial-grade VCC monitoring | Select if legacy 5V design requires faster access but can accept higher power and narrower temp range (0°C to 70°C) |
| DS1248W-100 | Same 3.3V/IND spec; 1M-bit (128k × 8); 100ns access; identical pinout and control logic | Higher density for extended log buffers; same footprint and timing - true upward-compatible upgrade | Choose when application requires >256k-bit nonvolatile storage without changing PCB layout or firmware timing |
Compared with STK12C68-5 and DS1248W-100, the DS1230W-100 provides optimal balance of industrial temperature support, 3.3V compatibility, and proven 10-year retention in space-constrained 28-pin DIP designs - making it ideal for retrofitting legacy SRAM sockets where voltage and density are fixed constraints.
Availability
DS1230W-100 is available at Aetrix Electronics and suitable for industrial data loggers, medical device configuration storage, and programmable logic controller (PLC) state backup requiring stable component supply, long-life data retention, and RoHS-compliant packaging.
Supply support for DS1230W-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) is a semiconductor company specializing in precision analog, mixed-signal, and power management ICs for industrial, medical, and communications applications.
The DS1230W-100 belongs to Maxim's nonvolatile SRAM product line, engineered to eliminate external battery management and firmware overhead in mission-critical memory backup applications.
FAQ
What is the guaranteed data retention period for DS1230W-100?
The DS1230W-100 guarantees a minimum 10-year data retention period in the absence of external power, measured from the time VCC is first applied - enabled by its sealed lithium energy source and freshness seal that preserves full battery capacity until initial power-up.
Does DS1230W-100 require external circuitry for battery backup management?
No, the DS1230W-100 requires no external circuitry. It integrates lithium battery, voltage-monitoring logic, and power-switching circuitry internally. Automatic write protection activates at VTP (2.8V–3.0V), and lithium backup engages below ~2.5V without host intervention.
Is DS1230W-100 pin-compatible with standard 28-pin SRAMs?
Yes, the DS1230W-100 uses a JEDEC-standard 28-pin DIP footprint and matches the pinout of common 32k × 8 volatile SRAMs and 28256 EEPROMs, enabling direct socket replacement in existing designs without PCB modification.
What is the operating temperature range for DS1230W-100?
The DS1230W-100IND+ variant is rated for industrial operation from –40°C to +85°C. This specification is confirmed in the Ordering Information table and Absolute Maximum Ratings section of the official datasheet.
Can DS1230W-100 be reflow soldered?
No, the DS1230W-100 in the 28-pin EDIP package is rated for wave or hand soldering only. Reflow soldering would damage the internal lithium battery. For surface-mount applications, use the DS1230WP-100IND+ PowerCap Module variant instead.
DS1230W-100 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:
- 100ns
- Access Time:
- 100 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-100 FAQ
1.How can I place an order for DS1230W-100 through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1230W-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 DS1230W-100 reliable?
The price and inventory of DS1230W-100 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS1230W-100 is usually 5 days.
3.What payment methods are accepted for DS1230W-100?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1230W-100 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1230W-100?
DS1230W-100 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1230W-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 DS1230W-100?
For technical support, including DS1230W-100 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1230W-100 requirements.
6.How does Aetrix verify that DS1230W-100 is sourced from the original manufacturer or authorized distributors?
All DS1230W-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 DS1230W-100 meets industry standards.
7.What is the process for return or replacement of DS1230W-100?
All DS1230W-100 units undergo pre-shipment inspection (PSI). If there is an issue with DS1230W-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 DS1230W-100 part is unused and in its original packaging.
Return procedure for DS1230W-100:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DS1230W-100 Tags
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M24C02-WMN6TP
STMicroelectronics
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AT24C02C-XHM-T
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AT21CS01-STUM10-T
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24LC01BT-I/OT
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M24C02-FMC6TG
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AT24CS02-SSHM-T
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93LC46BT-I/OT
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AT24C04C-SSHM-T
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AT24C08C-STUM-T
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