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Analog Devices Inc./Maxim Integrated DS1250WP-150
- Part No.:
- DS1250WP-150
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Memory
- Package:
- 34-PowerCap™ Module
- Datasheet:
-
DS1250WP-150.pdf
- Description:
- IC NVSRAM 4MBIT PAR 34PWRCAP
- Quantity:
- Payment:
- Shipping:
Inventory:2,498
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Product details
Overview
DS1250WP-150 from Maxim Integrated is a 4,194,304-bit (524,288 × 8) nonvolatile static RAM with integrated lithium backup, 3.3V supply, 100ns read/write access time, and JEDEC-standard 34-pin PowerCap Module (PCM) package. It replaces volatile SRAM, EEPROM, or Flash in systems requiring automatic data retention during power loss-e.g., industrial PLCs, medical data loggers, and telecom base station configuration storage.
For engineers reviewing the DS1250WP-150 datasheet, DS1250WP-150 pinout, DS1250WP-150 application, or DS1250WP-150 equivalent, key selection criteria include its self-contained battery switchover at ~2.5V, unlimited write cycles, industrial-grade -40°C to +85°C operation, and surface-mountable PCM architecture requiring separate DS9034PCI+ PowerCap attachment.
Technical Context
The DS1250WP-150 implements autonomous power-fail detection and seamless lithium source activation below ~2.5V, with unconditional write protection triggered at VTP = 2.8–3.0V. Its control logic isolates all inputs and forces outputs to high-impedance during data retention mode, eliminating external supervision circuitry.
It supports standard asynchronous parallel interface timing: CE/WE/OE-controlled read/write cycles with tACC = 100ns, tWC = 100ns, and tOE = 50ns. The PCM package decouples reflow-soldered module base from the lithium PowerCap, enabling safe assembly and field-replaceable backup battery via snap-on mechanical interface.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4,194,304 bits (524,288 × 8), directly replaces 512k×8 SRAM without address decoding changes |
| Access Time | 100 ns - guarantees full-speed compatibility with 10 MHz bus systems |
| Supply Voltage | 3.3 V ±0.3 V - operates across entire industrial rail tolerance without regulator overhead |
| Data Retention | 10 years minimum without external power - enabled only after first VCC application, preserving full battery capacity |
| Write Cycles | Unlimited - eliminates wear-leveling firmware and endurance monitoring |
| Operating Temp | -40°C to +85°C - qualified for extended industrial environments without derating |
| Power-Down Threshold | VTP = 2.8–3.0 V - initiates automatic write protect before system brownout corrupts data |
Pinout & Package
The DS1250WP-150 uses a 34-pin PowerCap Module (PCM) package: a surface-mountable module base with dedicated contacts for mating with DS9034PCI+ PowerCap. The lithium battery is physically and electrically isolated until snap-on installation and first power-up.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A18 | Address Inputs | 19-bit address bus supporting full 524,288-word addressing; no multiplexing required |
| DQ0–DQ7 | Data I/O | 8-bit bidirectional data bus compatible with standard microprocessor data paths |
| CE | Chip Enable | Active-low chip select; controls device enable and participates in write-cycle timing (tWR2) |
| WE | Write Enable | Active-low write strobe; determines write start/stop edges with CE per tWP and tWR1 |
| OE | Output Enable | Active-low output control; enables data drivers during reads, must be high during writes to avoid contention |
| VCC | Power Supply | +3.3 V main supply; powers SRAM core and control logic above 3.0 V |
| GND | Ground | Reference return for all signals and internal switching circuits |
| VBAT | Lithium Backup Input | Connected internally to DS9034PCI+ PowerCap; energized only when VCC < ~2.5 V |
Key Features
| Feature | Design Value |
|---|---|
| Freshness Seal | Lithium source electrically disconnected until first VCC >3.0 V application - ensures full 10-year retention budget from deployment |
| Autonomous Power Switching | Hardware-based VCC monitoring and sub-2.5 V lithium switchover - zero software or external IC required for data protection |
| Standardized PCM Interface | 34-pin module base with keyed DS9034PCI+ snap-on - enables reflow-safe assembly and field battery replacement |
| Industrial Temperature Qualification | Full -40°C to +85°C operation with guaranteed tACC/tWC/tOE specs - suitable for uncontrolled enclosure deployments |
| No External Support Circuitry | Self-contained control logic, voltage monitor, and power switch - eliminates discrete supervisors, regulators, and capacitors |
Applications
| Industrial Data Logger | Telecom Base Station |
|---|---|
Use Scenario: Continuous timestamped sensor readings stored during mains failure or battery backup mode. IC Role / Device Role / Timing Role: Nonvolatile SRAM holding real-time operational logs and calibration tables with zero write latency. Use Value: 10-year data retention and unlimited writes eliminate SD card wear and filesystem corruption risks in headless deployments. | Use Scenario: Storing FPGA configuration bitstreams and radio parameter sets across repeated power cycles. IC Role / Device Role / Timing Role: Byte-wide parallel memory providing immediate post-power-up access to critical boot assets. Use Value: 100 ns access time enables direct CPU/FPGA read without wait states; PCM modularity allows hot-swap battery refresh. |
| Medical Diagnostic Equipment | Programmable Logic Controller |
Use Scenario: Capturing patient waveform snapshots and diagnostic settings during emergency shutdown. IC Role / Device Role / Timing Role: Fail-safe memory preserving last-known valid state and error history for regulatory audit trails. Use Value: Write protection activates at 2.8 V - captures data before system reset threshold, meeting IEC 62304 power-loss requirements. | Use Scenario: Holding ladder logic program code and I/O mapping tables across factory floor power interruptions. IC Role / Device Role / Timing Role: Directly interfaced nonvolatile memory replacing battery-backed SRAM modules in legacy controller designs. Use Value: Pin-compatible upgrade path from 32-pin DIP NV SRAM; PCM eliminates hand-soldered battery maintenance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar nonvolatile SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STK14CA8-330I5F | 3.3V, 512k×8, 100ns, 32-pin SOIC; integrated battery; no PCM modularity | Requires wave soldering; battery not field-replaceable; lacks snap-on serviceability | Select when board space constraints prohibit 34-pin PCM footprint and field battery replacement is unnecessary |
| AS7C34098B-10TIN | 3.3V, 512k×8, 10ns access, volatile SRAM - requires external supervisor + battery + capacitor | Higher speed but adds BOM cost, layout area, and design validation complexity for backup circuitry | Select only when sub-10ns access is mandatory and full system-level backup design resources are available |
Compared with STK14CA8-330I5F and AS7C34098B-10TIN, the DS1250WP-150 uniquely combines field-serviceable lithium backup, industrial temperature qualification, and zero-external-component operation - reducing total ownership cost in long-lifecycle embedded systems where reliability and serviceability are prioritized over raw speed.
Availability
DS1250WP-150 is available at Aetrix Electronics and suitable for industrial data loggers, telecom base stations, medical diagnostic equipment, and programmable logic controllers requiring stable component supply, long-term data integrity, and field-maintainable nonvolatile memory solutions.
Supply support for DS1250WP-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 DS1250WP-150 belongs to Maxim's nonvolatile SRAM product line, designed specifically for systems demanding deterministic data retention during unpredictable power loss - with emphasis on simplified integration, long-term reliability, and serviceable backup architecture.
FAQ
What is the operating voltage range for the DS1250WP-150?
The DS1250WP-150 operates from 3.0 V to 3.6 V with nominal 3.3 V supply. Its write-protection threshold is specified at 2.8–3.0 V, and lithium backup activates below ~2.5 V. Operation outside 3.0–3.6 V violates recommended DC conditions and may impair data retention or timing compliance. The DS1250WP-150 does not support 5 V or dual-supply operation.
Does the DS1250WP-150 require an external PowerCap to function?
Yes - the DS1250WP-150 is a PowerCap Module (PCM) base only and requires mating with either DS9034PC+ or DS9034PCI+ PowerCap to provide lithium backup. Without the PowerCap installed, the DS1250WP-150 functions as a volatile SRAM with no data retention during power loss. The DS1250WP-150's VBAT pin remains unpowered until the PowerCap is snapped on and VCC is first applied.
How is data retention time calculated for the DS1250WP-150?
Data retention time for the DS1250WP-150 begins only after first application of VCC >3.0 V, which enables the internal freshness seal and connects the lithium source. The 10-year minimum retention is cumulative time spent in battery-backup mode (VCC = 0 V), not calendar time. The DS1250WP-150's retention budget is preserved until initial power-up, ensuring full specification compliance from deployment.
Can the DS1250WP-150 be used in place of a standard 32-pin DIP nonvolatile SRAM?
No - the DS1250WP-150 uses a 34-pin PowerCap Module footprint incompatible with 32-pin DIP sockets or land patterns. It is not a drop-in replacement for DS1250W-150 or other 32-pin EDIP variants. Migration requires PCB redesign to accommodate the 34-pin PCM layout and separate PowerCap mounting area. The DS1250WP-150 is intended for new designs prioritizing reflow-safe assembly and field battery serviceability.
What happens to the DS1250WP-150 outputs during power-down?
During power-down, when VCC falls below ~2.5 V, the DS1250WP-150 automatically places all outputs (DQ0–DQ7) into high-impedance state and disables all inputs (A0–A18, CE, WE, OE). This prevents bus contention and back-driving in multi-drop systems. The DS1250WP-150 maintains this tri-state condition throughout battery-backup operation and resumes normal I/O behavior only after VCC exceeds 3.0 V and stabilization delay tREC (125 ms) elapses.
DS1250WP-150 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 34-PowerCap™ Module
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- NVSRAM
- Technology:
- NVSRAM (Non-Volatile SRAM)
- Memory Size:
- 4Mbit
- Memory Organization:
- 512K 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:
- Surface Mount
- Supplier Device Package:
- 34-PowerCap Module
DS1250WP-150 FAQ
1.How can I place an order for DS1250WP-150 through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1250WP-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 DS1250WP-150 reliable?
The price and inventory of DS1250WP-150 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS1250WP-150 is usually 5 days.
3.What payment methods are accepted for DS1250WP-150?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1250WP-150 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1250WP-150?
DS1250WP-150 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1250WP-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 DS1250WP-150?
For technical support, including DS1250WP-150 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1250WP-150 requirements.
6.How does Aetrix verify that DS1250WP-150 is sourced from the original manufacturer or authorized distributors?
All DS1250WP-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 DS1250WP-150 meets industry standards.
7.What is the process for return or replacement of DS1250WP-150?
All DS1250WP-150 units undergo pre-shipment inspection (PSI). If there is an issue with DS1250WP-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 DS1250WP-150 part is unused and in its original packaging.
Return procedure for DS1250WP-150:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DS1250WP-150 Tags
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M24C02-WMN6TP
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