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Analog Devices Inc./Maxim Integrated DS1250WP-100+
- Part No.:
- DS1250WP-100+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Memory
- Package:
- 34-PowerCap™ Module
- Datasheet:
-
DS1250WP-100+.pdf
- Description:
- IC NVSRAM 4MBIT PAR 34PWRCAP
- Quantity:
- Payment:
- Shipping:
Inventory:2,038
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Product details
Overview
DS1250WP-100+ 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 - such as industrial PLCs, medical data loggers, and telecom base station configuration storage.
For engineers reviewing the DS1250WP-100+ datasheet, DS1250WP-100+ pinout, DS1250WP-100+ application, or DS1250WP-100+ equivalent, key selection criteria include guaranteed 10-year data retention without external power, unlimited write cycles, automatic VCC-fail detection and write protection at 2.8V, surface-mount compatibility via PCM architecture, and industrial-grade temperature support when ordered with IND suffix.
Technical Context
The DS1250WP-100+ implements a self-contained nonvolatile memory system combining static RAM, lithium battery switching circuitry, and voltage-monitoring logic. It operates fully statically with no refresh required and transitions seamlessly between VCC-powered and battery-backed modes based on real-time VCC monitoring down to ~2.5V.
Its PowerCap Module (PCM) architecture separates the SRAM/control die (in the 34-pin module base) from the replaceable DS9034PC+ PowerCap, enabling reflow soldering of the base without thermal damage to the lithium cell. The standardized pinout ensures interoperability across Maxim's nonvolatile SRAM family.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4,194,304 bits (524,288 words × 8 bits) - supports byte-wide microprocessor interfaces without address decoding overhead. |
| Access Time | 100 ns - enables direct connection to legacy 10-MHz bus systems without wait states. |
| Data Retention | 10 years minimum without external power - guaranteed from first VCC application, with lithium source electrically disconnected until initial power-up. |
| Write Protection Threshold | 2.8 V to 3.0 V - triggers unconditional write disable and high-impedance outputs before VCC decay causes data corruption. |
| Supply Voltage | 3.0 V to 3.6 V (3.3 V ±0.3 V) - compatible with modern low-voltage logic families and LDO-regulated rails. |
| Operating Temperature | 0°C to +70°C (Commercial grade) - validated for stable operation in controlled-environment embedded systems. |
| Standby Current | 30 µA to 250 µA - enables ultra-low-power retention in battery-backed systems during extended idle periods. |
Pinout & Package
DS1250WP-100+ uses a 34-pin PowerCap Module (PCM) package, consisting of a surface-mountable module base (with SRAM and control circuitry) and a snap-on DS9034PC+ PowerCap containing the lithium battery. The PCM design avoids exposing the battery to reflow temperatures.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A18 | Address Inputs | 19-bit address bus supporting full 524,288-word addressing; TTL/CMOS-compatible inputs. |
| DQ0–DQ7 | Data I/O | Bi-directional 8-bit data bus; high-impedance outputs when CE or OE inactive. |
| CE | Chip Enable | Active-low chip select; initiates read/write cycles and controls output enable timing. |
| WE | Write Enable | Active-low write strobe; determines write start/stop edges in conjunction with CE. |
| OE | Output Enable | Active-low output control; used only during reads to gate data drivers. |
| VCC | Power Supply | +3.3 V main supply; powers SRAM and control logic; monitored continuously for fail detection. |
| GND | Ground | Reference return path for all signals and power; two dedicated pins (pins 16 and 32) reduce noise coupling. |
| VBAT | Battery Input | Connection point for lithium energy source inside DS9034PC+ PowerCap; isolated until first VCC application. |
| NC | No Connect | Pins 13, 20, and 33 are unconnected; must remain floating per datasheet. |
Key Features
| Feature | Design Value |
|---|---|
| Automatic Power-Fail Response | Switches to lithium backup within 1.5 µs of VCC falling below 2.8 V, disabling writes and isolating I/O to prevent corruption. |
| Unlimited Write Cycles | Eliminates wear-out concerns associated with EEPROM/Flash; supports real-time logging and frequent configuration updates. |
| Freshness Seal | Lithium source remains electrically disconnected until first VCC >3.0 V, preserving full 10-year retention capacity from shipment. |
| Standardized PCM Pinout | Ensures mechanical and electrical compatibility across Maxim's nonvolatile SRAM portfolio, simplifying board-level upgrades. |
| Surface-Mountable Base | 34-pin PCM module base withstands 260°C reflow; PowerCap snaps on post-soldering, avoiding thermal degradation of lithium cell. |
Applications
| Industrial Data Logger | Telecom Configuration Storage |
|---|---|
Use Scenario: Continuous recording of sensor readings in remote substations where AC power may be intermittent. IC Role / Device Role / Timing Role: Nonvolatile SRAM holding last-known operational state and timestamped measurements during grid outages. Use Value: Guarantees 10-year data integrity without supercapacitors or external battery management, reducing BOM count and field failure risk. | Use Scenario: Storing boot firmware parameters and network provisioning data in DSLAM line cards. IC Role / Device Role / Timing Role: Byte-accessible, fast-read configuration memory that survives hot-swap events and firmware updates. Use Value: 100 ns access enables zero-wait-state reads during initialization; unlimited writes allow dynamic parameter tuning without endurance limits. |
| Medical Diagnostic Equipment | Automated Test Equipment (ATE) |
Use Scenario: Capturing calibration coefficients and patient session logs in portable ultrasound devices with battery-only operation. IC Role / Device Role / Timing Role: Primary nonvolatile storage for critical calibration data, accessed directly by ARM Cortex-M4 host processor. Use Value: Eliminates need for external EEPROM programming during manufacturing; freshness seal ensures full retention life from first clinical use. | Use Scenario: Storing test pattern sequences and pass/fail thresholds in rack-mounted boundary-scan controllers. IC Role / Device Role / Timing Role: High-reliability, fast-access memory for real-time test vector loading and result buffering. Use Value: 3.3 V CMOS interface matches FPGA I/O standards; low standby current (<250 µA) extends uptime during idle test phases. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar nonvolatile SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DS1250W-100+ | 32-pin EDIP package; integrated lithium (no separate PowerCap); wave/hand-solder only; same 100 ns speed and 3.3 V operation. | Suitable for through-hole legacy designs or space-constrained boards where surface-mount is not feasible. | Select DS1250W-100+ when DIP footprint and hand-assembly are preferred; avoid if reflow soldering or field-replaceable battery is required. |
| STK15C88-100I | 4 Mbit nvSRAM in 32-pin SOIC; 100 ns access; 3.3 V; but uses internal capacitor-based backup (not lithium), limiting retention to ~72 hours unless externally charged. | Applicable where short-term power-loss protection suffices and RoHS-compliant SOIC is mandated. | Choose STK15C88-100I only for cost-sensitive, short-retention applications; DS1250WP-100+ provides true 10-year retention without external charging circuitry. |
Compared with DS1250W-100+, the DS1250WP-100+ adds surface-mount capability and field-replaceable battery via PCM, while STK15C88-100I trades long-term retention for smaller SOIC footprint and lower cost - making DS1250WP-100+ optimal for mission-critical, long-life industrial deployments.
Availability
DS1250WP-100+ is available at Aetrix Electronics and suitable for industrial data loggers, telecom configuration storage, medical diagnostic equipment, and automated test equipment requiring stable component supply, long-term lifecycle support, and guaranteed 10-year data retention under intermittent power conditions.
Supply support for DS1250WP-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 U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and computing applications.
The DS1250WP-100+ belongs to Maxim's nonvolatile SRAM product line, engineered specifically for systems demanding seamless, maintenance-free data retention during unpredictable power interruptions - targeting industrial control, medical instrumentation, and infrastructure equipment.
FAQ
What is the guaranteed data retention period for DS1250WP-100+?
The DS1250WP-100+ guarantees a minimum 10-year data retention period in the absence of external power, measured from the time VCC is first applied. This retention is enabled by an integrated lithium energy source that remains electrically disconnected until initial power-up, preserving full battery capacity. The specification assumes proper operating conditions and adherence to recommended DC operating voltages and temperature ranges.
Does DS1250WP-100+ require external support circuitry for microprocessor interfacing?
No, DS1250WP-100+ requires no external support circuitry for standard microprocessor interfacing. Its TTL/CMOS-compatible address, data, and control signals (A0–A18, DQ0–DQ7, CE, WE, OE) operate directly with common 3.3 V logic families. The built-in voltage monitor, lithium switch, and write-protection logic are fully autonomous - eliminating the need for external supervisors, backup capacitors, or battery management ICs.
How does the PowerCap Module (PCM) architecture of DS1250WP-100+ differ from the DIP version?
The DS1250WP-100+ uses a 34-pin PowerCap Module (PCM) architecture comprising a surface-mountable module base and a snap-on DS9034PC+ PowerCap. Unlike the 32-pin EDIP-packaged DS1250W-100+, the PCM allows reflow soldering of the base without thermal stress on the lithium cell. The PowerCap is field-replaceable using a standard screwdriver, enabling battery renewal without PCB replacement - a key advantage for long-lifecycle industrial systems.
What happens to DS1250WP-100+ when VCC drops below the write-protection threshold?
When VCC falls below 2.8 V, DS1250WP-100+ immediately disables write operations, places all inputs in "don't care" state, and forces outputs into high-impedance mode. At ~2.5 V, its internal power-switching circuit connects the lithium source to retain RAM contents. During power-up, the lithium source disconnects and VCC resumes control once VCC exceeds ~2.5 V, with full operation restored above 3.0 V - all without software intervention.
Is DS1250WP-100+ RoHS-compliant and lead-free?
Yes, DS1250WP-100+ is RoHS-compliant and lead-free, as indicated by the "+" suffix in the part number. Maxim Integrated certifies this device to meet EU Directive 2011/65/EU (RoHS 2) requirements, including restrictions on lead, mercury, cadmium, hexavalent chromium, PBB, and PBDE. The package uses matte tin plating and complies with JEDEC J-STD-020 moisture sensitivity level (MSL) standards for surface-mount assembly.
DS1250WP-100+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 34-PowerCap™ Module
- Packaging:
- Tube
- Product Status:
- Active
- 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:
- 100ns
- Access Time:
- 100 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-100+ FAQ
1.How can I place an order for DS1250WP-100+ through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1250WP-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 DS1250WP-100+ reliable?
The price and inventory of DS1250WP-100+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS1250WP-100+ is usually 5 days.
3.What payment methods are accepted for DS1250WP-100+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1250WP-100+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1250WP-100+?
DS1250WP-100+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1250WP-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 DS1250WP-100+?
For technical support, including DS1250WP-100+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1250WP-100+ requirements.
6.How does Aetrix verify that DS1250WP-100+ is sourced from the original manufacturer or authorized distributors?
All DS1250WP-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 DS1250WP-100+ meets industry standards.
7.What is the process for return or replacement of DS1250WP-100+?
All DS1250WP-100+ units undergo pre-shipment inspection (PSI). If there is an issue with DS1250WP-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 DS1250WP-100+ part is unused and in its original packaging.
Return procedure for DS1250WP-100+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DS1250WP-100+ Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
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AT24C02C-SSHM-T
Microchip Technology
-
24LC01BT-I/OT
Microchip Technology
-
M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
-
AT24C04C-SSHM-T
Microchip Technology
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24LC01BT-I/SN
Microchip Technology
-
24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
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