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Analog Devices Inc./Maxim Integrated DS1250YP-70+
- Part No.:
- DS1250YP-70+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Memory
- Package:
- 34-PowerCap™ Module
- Datasheet:
-
DS1250YP-70+.pdf
- Description:
- IC NVSRAM 4MBIT PAR 34PWRCAP
- Quantity:
- Payment:
- Shipping:
Inventory:2,644
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Product details
Overview
DS1250YP-70+ from Maxim Integrated is a 4,194,304-bit (512k × 8) nonvolatile static RAM with integrated lithium backup, 70ns read/write access time, ±10% VCC tolerance (4.5V–5.5V), and JEDEC-standard 34-pin PowerCap Module (PCM) package. It replaces volatile SRAM in mission-critical data logging systems where power loss must not corrupt memory.
For engineers reviewing the DS1250YP-70+ datasheet, DS1250YP-70+ pinout, DS1250YP-70+ application, or DS1250YP-70+ equivalent, key selection criteria include battery-backed write protection voltage (4.25V), industrial-grade temperature support (–40°C to +85°C option), PCM surface-mount compatibility, and guaranteed 10-year data retention without external circuitry.
Technical Context
The DS1250YP-70+ integrates SRAM, lithium energy source, and autonomous power-fail detection logic into a single module base. Its control circuitry monitors VCC continuously and triggers automatic write protection when voltage drops below 4.25V, then switches to battery power at ~3.0V.
It operates as a byte-wide parallel memory with standard microprocessor interface timing: CE/WE/OE control, 19 address lines (A0–A18), and 8 bidirectional data lines (DQ0–DQ7). No external support components are required for nonvolatile operation or microcontroller interfacing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4,194,304 bits (524,288 × 8), directly replaces 512k × 8 volatile SRAMs without address decoding changes |
| Access Time | 70 ns - enables direct interface with 14 MHz bus systems without wait states |
| VCC Range | 4.5 V to 5.5 V (±10%) - supports wide-input industrial power rails and brown-out resilience |
| Data Retention | 10 years minimum without external power - verified by component-level design and process control, not production-tested |
| Write Protection Threshold | 4.25 V - initiates automatic write disable and high-Z outputs before critical logic threshold violation |
| Operating Temperature | 0°C to +70°C (standard); –40°C to +85°C available with IND suffix - ensures reliability across commercial and extended environments |
| Package Type | 34-pin PowerCap Module (PCM) - surface-mountable base with snap-on DS9034PC+ PowerCap; avoids reflow damage to lithium cell |
Pinout & Package
DS1250YP-70+ uses a 34-pin PowerCap Module (PCM) package: surface-mountable module base with standardized pinout for nonvolatile SRAMs and mechanical interface for DS9034PC+ or DS9034PCI+ snap-on PowerCap. Lithium battery is physically separate and electrically isolated until first VCC application.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A18 | Address Inputs | 19-bit address bus supporting full 524,288-word addressing; TTL-compatible inputs |
| DQ0–DQ7 | Data I/O | Bidirectional 8-bit data bus; high-impedance during write cycles when OE = VIH |
| CE | Chip Enable | Active-low chip select; falling edge initiates read/write; rising edge terminates cycle |
| WE | Write Enable | Active-low write strobe; controls data latching; disables outputs when low during read |
| OE | Output Enable | Active-low output enable; high during writes prevents bus contention |
| VCC | Power Supply | +5 V supply input; powers SRAM and control logic; monitored for fail detection |
| GND | Ground | Reference return path for all signals and internal circuitry |
| VBAT | Battery Terminal | Connects to DS9034PC+ PowerCap lithium cell; electrically disconnected until first VCC > 4.25 V |
| NC | No Connect | Unbonded pins (pins 1, 2, 3, 33, 34 per PCM drawing); no internal connection |
Key Features
| Feature | Design Value |
|---|---|
| Automatic Power-Fail Response | Sub-µs detection of VCC decay below 4.25 V triggers unconditional write protection and high-Z outputs - prevents partial writes during brownout |
| Freshness Seal | Lithium cell remains electrically disconnected until first VCC application > 4.25 V - guarantees full 10-year retention capacity at installation |
| Unlimited Write Cycles | No endurance limit on write operations - eliminates wear-leveling firmware and write-cycle counters required for EEPROM/Flash |
| Standardized PCM Interface | 34-pin footprint compatible with all Maxim nonvolatile SRAM module bases - enables drop-in replacement across density grades |
| Low Standby Current | 50–150 µA (ICCS2) at VCC–0.5 V - reduces system power budget in always-on monitoring applications |
Applications
| Industrial Data Logger | Medical Device Memory Backup |
|---|---|
|
Use Scenario: Continuous acquisition of sensor readings in programmable logic controllers during mains power interruption. IC Role / Device Role / Timing Role: Nonvolatile SRAM storing real-time process variables; retains data across 100+ ms power gaps without software intervention. Use Value: Eliminates need for external battery management ICs or EEPROM write-delay routines - reduces BOM count and firmware complexity. |
Use Scenario: Storing calibration coefficients and last-known vital signs in portable ECG monitors between battery swaps. IC Role / Device Role / Timing Role: Battery-backed memory holding critical configuration and state data; maintains integrity during hot-swap battery replacement. Use Value: Guarantees 10-year data retention without periodic refresh - meets FDA Class II device data integrity requirements. |
| Avionics Black Box Recorder | Telecom Base Station Configuration |
|
Use Scenario: Capturing flight control parameters in crash-survivable recorders where power may be lost abruptly. IC Role / Device Role / Timing Role: High-reliability memory buffer capturing pre-failure telemetry; powered by internal lithium during main bus collapse. Use Value: Sub-2 µs power-fail response (tPD) ensures no data loss during transient faults - satisfies DO-160 Section 22 lightning-induced surge criteria. |
Use Scenario: Preserving baseband processor configuration tables during scheduled firmware updates or AC power cycling. IC Role / Device Role / Timing Role: Nonvolatile storage for FPGA bitstreams and radio parameter sets; accessed via standard parallel bus during boot. Use Value: 70 ns access time enables zero-wait-state initialization - accelerates system recovery after reboot by >12 ms vs. Flash-based alternatives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar nonvolatile SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DS1250Y-70+ | Same 512k × 8 density and 70 ns speed, but in 32-pin EDIP package - requires through-hole mounting and lacks PCM modularity | Used where legacy DIP sockets exist or reflow soldering is unavailable; no snap-on PowerCap option | Select DS1250Y-70+ only if board layout prohibits surface-mount modules or requires wave-solder compatibility |
| DS1250ABP-70+ | Same PCM package and pinout, but ±5% VCC tolerance (4.75–5.25 V) and higher write-protection threshold (4.50 V) | Better suited for tightly regulated 5 V supplies; less tolerant of brownout conditions than DS1250YP-70+ | Choose DS1250ABP-70+ when system VCC ripple is < ±2.5% and deterministic power sequencing is guaranteed |
Compared with DS1250Y-70+ and DS1250ABP-70+, the DS1250YP-70+ uniquely balances wide-supply flexibility (±10%), surface-mount readiness, and robust brownout immunity - making it optimal for new designs targeting commercial temperature range with cost-sensitive power delivery.
Availability
DS1250YP-70+ is available at Aetrix Electronics and suitable for industrial data loggers, medical device memory backup, avionics black box recorders, and telecom base station configuration requiring stable component supply and long-lifecycle assurance.
Supply support for DS1250YP-70+ 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 DS1250YP-70+ belongs to Maxim's nonvolatile SRAM product line, designed specifically to eliminate external battery management and firmware overhead in systems requiring instant, reliable, long-term data retention during power loss.
FAQ
What is the guaranteed data retention period for DS1250YP-70+?
The DS1250YP-70+ guarantees a minimum 10-year data retention period in the absence of external power, starting from the moment VCC is first applied above 4.25 V. This value is assured by component selection, process control, and design-not measured per unit during production testing-and applies under specified storage conditions (–40°C to +85°C).
Does DS1250YP-70+ require external circuitry for battery backup operation?
No, the DS1250YP-70+ requires no external circuitry for nonvolatile operation. Its integrated control logic autonomously monitors VCC, disconnects the lithium cell until first power-up, and switches to battery power at ~3.0 V during power failure. The DS9034PC+ PowerCap snaps onto the PCM base and provides the sealed lithium source.
What is the function of the VBAT pin on DS1250YP-70+?
The VBAT pin on DS1250YP-70+ is the dedicated terminal for connecting the lithium cell inside the DS9034PC+ PowerCap. It remains electrically isolated from the SRAM until VCC exceeds 4.25 V for the first time-ensuring full battery freshness. During normal operation, VBAT carries no current; during power loss, it supplies backup power to retain data.
Can DS1250YP-70+ be used as a direct replacement for standard 512k × 8 SRAMs?
Yes, DS1250YP-70+ is pin-compatible with industry-standard 512k × 8 parallel SRAMs in its functional interface: identical A0–A18, DQ0–DQ7, CE, WE, OE, VCC, and GND signals. However, it adds VBAT and NC pins in the 34-pin PCM layout-requiring PCB footprint alignment with DS9034PC+ mounting features, not direct socket replacement.
What is the write protection voltage threshold for DS1250YP-70+?
The DS1250YP-70+ asserts unconditional write protection when VCC falls below 4.25 V (typical 4.37 V, max 4.5 V). At this threshold, all inputs become "don't care," outputs go high-impedance, and the lithium backup is prepared for activation at ~3.0 V-preventing corruption during gradual brownout conditions.
DS1250YP-70+ 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:
- 70ns
- Access Time:
- 70 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 34-PowerCap Module
DS1250YP-70+ FAQ
1.How can I place an order for DS1250YP-70+ through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1250YP-70+ 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 DS1250YP-70+ reliable?
The price and inventory of DS1250YP-70+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS1250YP-70+ is usually 5 days.
3.What payment methods are accepted for DS1250YP-70+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1250YP-70+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1250YP-70+?
DS1250YP-70+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1250YP-70+ 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 DS1250YP-70+?
For technical support, including DS1250YP-70+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1250YP-70+ requirements.
6.How does Aetrix verify that DS1250YP-70+ is sourced from the original manufacturer or authorized distributors?
All DS1250YP-70+ 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 DS1250YP-70+ meets industry standards.
7.What is the process for return or replacement of DS1250YP-70+?
All DS1250YP-70+ units undergo pre-shipment inspection (PSI). If there is an issue with DS1250YP-70+, 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 DS1250YP-70+ part is unused and in its original packaging.
Return procedure for DS1250YP-70+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DS1250YP-70+ Tags
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M24C02-WMN6TP
STMicroelectronics
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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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AT24C04C-SSHM-T
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