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Analog Devices Inc./Maxim Integrated DS1270W-150#
- Part No.:
- DS1270W-150#
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Memory
- Package:
- 36-DIP Module (0.610", 15.49mm)
- Datasheet:
-
DS1270W-150#.pdf
- Description:
- IC NVSRAM 16MBIT PARALLEL 36EDIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,375
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Product details
Overview
DS1270W-150# from Maxim Integrated (now Analog Devices) is a 3.3V, 8Mb nonvolatile SRAM with lithium-backed data retention, organized as 1,048,576 × 8 bits. It features 100ns read/write access time, automatic write protection during power loss, and industrial temperature support (–40°C to +85°C). Used in mission-critical data logging systems where persistent memory must survive extended power outages without external circuitry.
For engineers reviewing the DS1270W-150# datasheet, DS1270W-150# pinout, DS1270W-150# application, or DS1270W-150# equivalent, key selection criteria include guaranteed 10-year data retention at VCC = 0V, no write-cycle limits, CMOS-compatible 3.3V timing, and self-contained lithium backup switching - all verified under industrial temperature operation.
Technical Context
The DS1270W-150# implements a fully static NV SRAM architecture with integrated voltage-monitoring logic that triggers lithium source activation when VCC falls below ~2.5V. Its control circuitry unconditionally enables write protection and places outputs in high-impedance state upon power decay, eliminating need for external supervisors or backup controllers.
It operates in three distinct modes: normal read/write (VCC > 3.0V), transition protection (2.5V < VCC < 3.0V), and battery-retention (VCC < 2.5V). The device uses standard parallel interface signals (CE, WE, OE, A0–A19, DQ0–DQ7) with no bus turnaround or protocol overhead - compatible with legacy microprocessor address/data buses.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 8,388,608-bit (1,048,576 × 8) - supports byte-wide addressing without external multiplexing |
| Access Time | 100ns - meets timing requirements of 10MHz asynchronous bus interfaces |
| Data Retention | 10 years at 0V - eliminates need for periodic refresh or external battery management |
| Write Protection Threshold | VTP = 2.8V to 3.0V - ensures early lockout before supply collapse corrupts writes |
| Supply Voltage Range | 3.0V to 3.6V - compatible with regulated 3.3V systems; tolerates ±9% variation |
| Operating Temperature | –40°C to +85°C - qualified for industrial environments without derating |
| Standby Current | 100µA to 250µA - enables low-power hold mode during system sleep |
Pinout & Package
DS1270W-150# is housed in a 36-pin 740mil Extended Dual In-line Package (EDIP), RoHS-compliant per "#" suffix. Pin layout matches industry-standard 36-pin EDIP footprint with 0.1" row spacing and staggered lead configuration for wave soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A19 | Address Inputs | 20-bit parallel address bus supporting full 1M-word decoding without external latching |
| DQ0–DQ7 | Data I/O | Bi-directional 8-bit data bus with TTL-compatible output drive and high-Z on deselect |
| CE | Chip Enable | Active-low chip select; initiates access when low and combined with OE/WE state |
| WE | Write Enable | Active-low write strobe; controls direction of DQ bus and write timing window |
| OE | Output Enable | Active-low output enable; disables drivers during writes to prevent bus contention |
| VCC | Power Supply | +3.3V primary supply; powers logic and enables lithium disconnect until first power-up |
| GND | Ground | Reference return path for all digital and analog functions including lithium switch control |
| NC | No Connect | Three pins (pins 12, 24, 35) are internally unused; must remain unconnected |
Key Features
| Feature | Design Value |
|---|---|
| Freshness Seal | Lithium cell electrically isolated until first VCC application > VTP, preserving full 10-year retention capacity |
| Automatic Power-Fail Response | Sub-2µs detection of VCC decay below 2.8V triggers unconditional write protect and high-Z outputs |
| Unlimited Write Cycles | No endurance limit - supports continuous logging or real-time buffer updates over product lifetime |
| Zero-Support-Circuitry Operation | Self-contained voltage monitor, lithium switch, and backup controller require no external components |
| Industrial Temperature Qualification | Full AC/DC specs guaranteed from –40°C to +85°C, including tACC = 100ns and ICCS2 ≤ 150µA |
Applications
| Industrial Data Logger | Medical Device Memory Backup |
|---|---|
Use Scenario: Continuous acquisition of sensor data in remote environmental monitoring stations with intermittent grid power. IC Role / Device Role / Timing Role: Nonvolatile SRAM storing timestamped measurements during mains failure; retains data across multi-week outages. Use Value: Eliminates need for EEPROM wear leveling or flash programming delays; enables immediate resume of logging after power restoration. | Use Scenario: Patient vital sign history storage in portable defibrillators and infusion pumps requiring FDA-compliant data persistence. IC Role / Device Role / Timing Role: Primary working memory with guaranteed 10-year retention of critical therapy records even if device remains unpowered for years. Use Value: Meets IEC 62304 Class C software safety requirements for nonvolatile data integrity without battery replacement service intervals. |
| Avionics Black Box Recorder | Railway Signaling Controller |
Use Scenario: Crash-survivable flight data recording in commercial aircraft, operating in wide thermal and vibration environments. IC Role / Device Role / Timing Role: High-reliability memory buffer capturing real-time telemetry; powered by aircraft bus but retaining data after crash-induced power loss. Use Value: Qualified to –40°C to +85°C with no performance degradation; withstands rapid VCC collapse (<2µs response) during impact events. | Use Scenario: Interlocking logic state storage in wayside signaling cabinets exposed to outdoor temperature extremes and EMI. IC Role / Device Role / Timing Role: Fail-safe memory holding last valid signal aspect and route configuration during utility brownouts or lightning-induced transients. Use Value: Automatic write protect prevents corruption from partial writes during voltage sags; certified for EN 50121-3-2 EMC immunity. |
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; 70ns access; no industrial temp grade; uses external capacitor for backup | Requires 5V system and external 0.47F capacitor; not suitable for 3.3V designs or extended temperature use | Select only for legacy 5V industrial controllers with existing capacitor-based backup infrastructure |
| AS6C8016 | Standard 8Mb SRAM (no NV); 15ns access; 3.3V; no lithium or retention capability | Provides speed and density but zero data retention - requires external NV solution (e.g., FRAM + supervisor) | Choose when ultra-fast access dominates over retention; pair with separate nonvolatile storage for critical state |
Compared with STK12C68 and AS6C8016, DS1270W-150# uniquely delivers integrated lithium backup, 10-year zero-VCC retention, and industrial temperature compliance in a single 3.3V-compatible package - eliminating design complexity and component count for fail-safe memory systems.
Availability
DS1270W-150# is available at Aetrix Electronics and suitable for industrial data loggers, medical device memory backup, and avionics black box recorders requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.
Supply support for DS1270W-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
Analog Devices (acquired Maxim Integrated in 2021) is a global leader in high-performance analog, mixed-signal, and power management semiconductors, serving industrial, automotive, communications, and healthcare markets.
The DS1270W-150# belongs to Maxim's legacy NV SRAM product line, engineered specifically for applications demanding deterministic, maintenance-free data persistence in harsh or unattended environments.
FAQ
What is the guaranteed data retention period for DS1270W-150# when VCC is removed?
The DS1270W-150# guarantees minimum 10 years of data retention in the absence of external power, measured cumulatively from the time VCC is first applied above VTP (2.8V). This specification is validated under industrial temperature conditions (–40°C to +85°C) and assumes proper soldering and handling per Maxim's packaging guidelines. The lithium energy source remains disconnected until initial power-up, preserving full capacity for the rated retention period. DS1270W-150# achieves this without external capacitors or supervisory ICs.
Does DS1270W-150# support true 3.3V operation, and what are its voltage tolerance limits?
Yes, DS1270W-150# is specified for true 3.3V operation with a recommended DC supply range of 3.0V to 3.6V (±9%). It meets all AC and DC electrical characteristics - including tACC = 100ns and ICCS2 ≤ 150µA - across this range. The device incorporates internal voltage monitoring that activates write protection at VTP = 2.8V to 3.0V, ensuring reliable behavior during brownouts. DS1270W-150# does not support 5V operation or level-shifting; direct connection to 3.3V logic families is required.
How does DS1270W-150# handle power-down and power-up transitions?
DS1270W-150# detects VCC decay with 1.5µs latency (tPD) and automatically switches to lithium backup when VCC falls below ~2.5V, placing all inputs in "don't care" state and outputs in high-impedance. On power-up, it reconnects VCC to RAM and disconnects lithium once VCC exceeds ~2.5V, resuming normal operation after VCC stabilizes above 3.0V (tREC = 125ms). DS1270W-150# requires no external reset sequencing or power-good signals to manage these transitions safely.
Are there any special PCB layout or soldering considerations for DS1270W-150#?
DS1270W-150# uses a 36-pin 740mil EDIP package intended for wave or hand soldering only (lead temperature ≤ 260°C for 10s). Avoid reflow soldering. Maintain ≥0.5mm clearance between VCC/GND and adjacent signal traces to minimize noise coupling into the lithium switch control path. Do not connect NC pins (12, 24, 35). Ground plane under the package is recommended for thermal stability. DS1270W-150# is RoHS-compliant ("#" suffix) and requires no special moisture sensitivity handling.
Can DS1270W-150# be used as a drop-in replacement for DS1265W-100#?
No - DS1270W-150# is not a drop-in replacement for DS1265W-100#. While both are 8Mb NV SRAMs in 36-pin EDIP packages, DS1270W-150# is a distinct part with different speed grading (150ns vs. 100ns), updated internal architecture, and revised ordering structure. DS1270W-150# datasheet supersedes DS1265W documentation; pinout and functional behavior are identical, but timing parameters and qualification test reports differ. DS1270W-150# must be validated in-system per its specific AC/DC specs before deployment.
DS1270W-150# 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:
- 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:
- 36-EDIP
DS1270W-150# FAQ
1.How can I place an order for DS1270W-150# through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1270W-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 DS1270W-150# reliable?
The price and inventory of DS1270W-150# are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS1270W-150# is usually 5 days.
3.What payment methods are accepted for DS1270W-150#?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1270W-150# transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1270W-150#?
DS1270W-150# orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1270W-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 DS1270W-150#?
For technical support, including DS1270W-150# datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1270W-150# requirements.
6.How does Aetrix verify that DS1270W-150# is sourced from the original manufacturer or authorized distributors?
All DS1270W-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 DS1270W-150# meets industry standards.
7.What is the process for return or replacement of DS1270W-150#?
All DS1270W-150# units undergo pre-shipment inspection (PSI). If there is an issue with DS1270W-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 DS1270W-150# part is unused and in its original packaging.
Return procedure for DS1270W-150#:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DS1270W-150# Tags
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M24C02-WMN6TP
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AT24C02C-XHM-T
Microchip Technology
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AT21CS01-STUM10-T
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M24C02-FMC6TG
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AT24CS02-SSHM-T
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24LC01BT-I/SN
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AT24C08C-STUM-T
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