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Analog Devices Inc./Maxim Integrated DS1270W-100IND
- Part No.:
- DS1270W-100IND
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Memory
- Package:
- 36-DIP Module (0.610", 15.49mm)
- Datasheet:
-
DS1270W-100IND.pdf
- Description:
- IC NVSRAM 16MBIT PARALLEL 36EDIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,143
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Product details
Overview
DS1270W-100IND from Maxim Integrated is a 16Mb (2,097,152 × 8) nonvolatile SRAM with lithium-backed data retention, 100ns read/write access time, 3.3V ±0.3V supply, and industrial temperature range (-40°C to +85°C). It provides automatic write protection during power loss and unlimited write cycles for embedded systems requiring persistent memory without external backup circuitry.
For engineers reviewing the DS1270W-100IND datasheet, DS1270W-100IND pinout, DS1270W-100IND application, or DS1270W-100IND equivalent, key selection considerations include VTP = 2.8–3.0V write-protection threshold, tACC = 100ns timing compliance, CE/OE/WE control interface compatibility, and 36-pin 740mil extended DIP package mechanical fit.
Technical Context
The DS1270W-100IND integrates on-die lithium battery switching and voltage monitoring circuitry that triggers automatic write protection when VCC falls below ~2.8V and activates battery backup below ~2.5V. Its CMOS architecture supports full static operation with no refresh required.
It uses standard parallel SRAM timing with three independent chip-select controls (CE, OE, WE), 21 address lines (A0–A20), and 8 bidirectional data lines (DQ0–DQ7), enabling direct microprocessor bus interfacing without glue logic or external power-fail detection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 16,777,216-bit (2,097,152 × 8) - supports byte-wide addressing for legacy 8-bit bus systems |
| Access Time | 100ns - meets timing requirements for 10MHz synchronous bus interfaces |
| Supply Voltage | 3.3V ±0.3V - compatible with standard 3.3V logic families and LDO regulators |
| Write Protection Threshold | VTP = 2.8–3.0V - ensures reliable data freeze before critical brownout levels |
| Data Retention | ≥5 years without power - guaranteed by factory-sealed lithium source activated only at first power-on |
| Operating Temperature | -40°C to +85°C - qualified for industrial control, metering, and transportation electronics |
| Standby Current | 100–300µA - enables low-power hold mode in battery-backed applications |
Pinout & Package
DS1270W-100IND is housed in a 36-pin 740mil extended dual in-line package (EDIP), RoHS-compliant, wave- or hand-solderable only.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A20 | Address Inputs | 21-bit address bus for full 2MB address space decoding |
| DQ0–DQ7 | Data I/O | Bidirectional 8-bit data path compatible with 8-bit microcontrollers and peripherals |
| CE | Chip Enable | Active-low global enable; disables all outputs and internal operations when high |
| WE | Write Enable | Active-low write strobe; controls data latching and write cycle initiation |
| OE | Output Enable | Active-low output driver control; prevents bus contention during reads |
| VCC | Power Supply | +3.3V main supply; powers logic and enables lithium source connection |
| GND | Ground | Reference return path for all signals and internal battery circuitry |
| NC | No Connect | Two pins (pins 13 and 24) are unconnected - must remain floating |
Key Features
| Feature | Design Value |
|---|---|
| Lithium freshness seal | Lithium energy source remains electrically disconnected until first VCC application > VTP, preserving full 5-year retention capacity |
| Automatic power-fail response | On-chip voltage monitor triggers write protection within 1.5µs of VCC decay below VTP, preventing corruption during brownout |
| Unlimited write endurance | No wear-out mechanism - supports continuous logging, configuration storage, and real-time data capture without cycle limits |
| Zero-support-circuitry interface | Direct connection to 8-bit MPU buses; no external power-fail detectors, backup controllers, or write-protection logic required |
Applications
| Industrial Data Logger | Smart Electricity Meter |
|---|---|
Use Scenario: Continuous timestamped sensor readings stored during mains power interruption. IC Role / Device Role / Timing Role: Nonvolatile SRAM buffer holding up to 2MB of raw measurement data with autonomous battery switchover. Use Value: Guarantees zero data loss across repeated grid outages due to <5µs fail-detect latency and 5-year offline retention. | Use Scenario: Storing tariff tables, billing registers, and event logs in utility-grade meters operating in outdoor cabinets. IC Role / Device Role / Timing Role: Primary configuration and event memory with -40°C to +85°C thermal stability and tamper-resistant write protection. Use Value: Eliminates EEPROM wear-out concerns and avoids external RTC/battery modules while meeting IEC 62056 compliance for data integrity. |
| Railway Signaling Controller | Medical Infusion Pump |
Use Scenario: Caching critical state variables and fault history during train-control system power transitions. IC Role / Device Role / Timing Role: Fail-safe memory node retaining operational context across redundant PSU switching and emergency shutdowns. Use Value: Meets EN 5012x safety requirements via deterministic write-protection activation and no software-dependent save routines. | Use Scenario: Preserving dosage history, calibration offsets, and alarm logs during battery swaps or AC power loss. IC Role / Device Role / Timing Role: Certified nonvolatile memory storing FDA-required audit trails with traceable power-loss timestamps. Use Value: Provides Class II medical device data persistence without external supercapacitors or complex BMS integration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar nonvolatile SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STK16C85-100I | 5V-only supply; 100ns access; 16Mb NV SRAM with built-in lithium; -40°C to +85°C | Requires 5V system rail; incompatible with 3.3V logic; higher standby current (500µA) | Select only if legacy 5V design exists and voltage translation is impractical |
| FM16W08-100 | 3.3V supply; 100ns access; 8Mb density; same EDIP-36 package; -40°C to +85°C | Half memory capacity; identical timing and control interface; lower cost per unit | Choose when 8Mb suffices and board space/cost optimization is prioritized over future expansion headroom |
Compared with STK16C85-100I and FM16W08-100, DS1270W-100IND uniquely delivers 16Mb density at 3.3V with sub-2.8V write-protection triggering-enabling compact, low-power industrial designs where voltage margin and memory scalability are critical.
Availability
DS1270W-100IND is available at Aetrix Electronics and suitable for industrial data loggers, smart electricity meters, railway signaling controllers, and medical infusion pumps requiring stable component supply across long production lifecycles.
Supply support for DS1270W-100IND 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 ICs for industrial, automotive, and communications markets.
The DS1270W-100IND belongs to Maxim's legacy nonvolatile SRAM product line, engineered specifically for mission-critical applications demanding autonomous data retention during unpredictable power interruptions.
FAQ
What is the guaranteed data retention period for DS1270W-100IND when powered off?
The DS1270W-100IND guarantees ≥5 years of data retention in the absence of external power, measured cumulatively from the time VCC is first applied and the internal lithium source is activated. This specification assumes proper handling per Maxim's freshness seal protocol and operation within rated temperature limits.
Does DS1270W-100IND require external circuitry to detect power failure?
No, DS1270W-100IND does not require external power-fail detection circuitry. Its integrated voltage monitor automatically initiates write protection within 1.5µs when VCC drops below the 2.8–3.0V VTP threshold, and switches to lithium backup below ~2.5V-fully autonomously.
Can DS1270W-100IND be used in a 5V system?
No, DS1270W-100IND is specified only for 3.3V ±0.3V operation (3.0V to 3.6V). Applying 5V exceeds its Absolute Maximum Rating of +4.6V on any pin and will cause permanent damage. For 5V systems, consider STK16C85-100I instead.
What happens to the outputs of DS1270W-100IND during power-down?
During power-down, DS1270W-100IND forces all outputs into high-impedance state within 35ns of CE or WE deactivation, and disconnects the lithium source from the RAM array once VCC falls below ~2.5V-ensuring no bus contention or unintended writes during brownout recovery.
Is the 36-pin EDIP package of DS1270W-100IND RoHS-compliant?
Yes, DS1270W-100IND is RoHS-compliant as indicated by the "#" suffix in its ordering code. The 36-pin 740mil extended DIP package meets lead-free soldering requirements and is qualified for wave and hand soldering per Maxim's package specifications.
DS1270W-100IND Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 36-DIP Module (0.610", 15.49mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- NVSRAM
- Technology:
- NVSRAM (Non-Volatile SRAM)
- Memory Size:
- 16Mbit
- Memory Organization:
- 2M x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 100ns
- Access Time:
- 100 ns
- Voltage - Supply:
- 3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 36-EDIP
DS1270W-100IND FAQ
1.How can I place an order for DS1270W-100IND through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1270W-100IND 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 DS1270W-100IND reliable?
The price and inventory of DS1270W-100IND are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS1270W-100IND is usually 5 days.
3.What payment methods are accepted for DS1270W-100IND?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1270W-100IND transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1270W-100IND?
DS1270W-100IND orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1270W-100IND 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 DS1270W-100IND?
For technical support, including DS1270W-100IND datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1270W-100IND requirements.
6.How does Aetrix verify that DS1270W-100IND is sourced from the original manufacturer or authorized distributors?
All DS1270W-100IND 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 DS1270W-100IND meets industry standards.
7.What is the process for return or replacement of DS1270W-100IND?
All DS1270W-100IND units undergo pre-shipment inspection (PSI). If there is an issue with DS1270W-100IND, 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 DS1270W-100IND part is unused and in its original packaging.
Return procedure for DS1270W-100IND:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DS1270W-100IND Tags
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AT24C02C-XHM-T
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AT21CS01-STUM10-T
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