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Analog Devices Inc./Maxim Integrated DS1250YP-70IND
- Part No.:
- DS1250YP-70IND
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Memory
- Package:
- 34-PowerCap™ Module
- Datasheet:
-
DS1250YP-70IND.pdf
- Description:
- IC NVSRAM 4MBIT PAR 34PWRCAP
- Quantity:
- Payment:
- Shipping:
Inventory:2,259
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Product details
Overview
DS1250YP-70IND from Maxim Integrated is a 4,194,304-bit (524,288 × 8) nonvolatile SRAM with lithium backup, 70ns access time, ±10% VCC tolerance (4.5V–5.5V), and industrial temperature rating (–40°C to +85°C). It replaces volatile 512k×8 SRAMs in mission-critical data logging systems where power loss protection is essential.
For engineers reviewing the DS1250YP-70IND datasheet, DS1250YP-70IND pinout, DS1250YP-70IND application, or DS1250YP-70IND equivalent, key selection factors include its automatic write-protection threshold at 4.25V, 10-year data retention without external power, JEDEC-standard 32-pin DIP-compatible footprint in PowerCap Module form, and direct microprocessor interface without support circuitry.
Technical Context
The DS1250YP-70IND integrates static RAM, lithium battery, and voltage-monitoring control circuitry into a single surface-mountable PowerCap Module (34-pin PCM). Its power-fail detection triggers within 1.5µs when VCC drops below 4.25V, switching to battery backup and enabling unconditional write protection.
It operates in three distinct modes: normal read/write (VCC ≥ 4.5V), data retention (VCC < 3.0V, lithium active), and transitional power-up/down (3.0V ≤ VCC < 4.5V). All 19 address lines (A0–A18) and 8 bidirectional data lines (DQ0–DQ7) remain functional across modes, with CE, WE, and OE controlling cycle timing per JEDEC SRAM protocol.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 4,194,304 bits (524,288 × 8), directly replaces 512k×8 SRAMs without address decoding changes |
| Access Time | 70 ns - guarantees full-speed compatibility with 14 MHz bus systems using standard SRAM timing |
| VCC Range | 4.5V to 5.5V (±10%) - supports wide-input industrial power rails without regulation overhead |
| Data Retention | 10 years minimum without external power - enabled by factory-sealed lithium cell disconnected until first power-on |
| Operating Temp | –40°C to +85°C - qualified for industrial control, avionics black boxes, and remote telemetry hardware |
| Write Cycles | Unlimited - eliminates wear-out concerns in high-frequency logging or configuration storage applications |
| Package Type | 34-pin PowerCap Module (PCM) - enables reflow soldering of module base before snap-on DS9034PCI+ battery attachment |
Pinout & Package
DS1250YP-70IND uses a 34-pin PowerCap Module (PCM) package with standardized pinout for nonvolatile SRAMs. The module base is surface-mountable; the lithium backup battery is added post-reflow via a keyed snap-on DS9034PCI+ PowerCap.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A18 | Address Inputs | 19-bit address bus supporting full 524,288-word addressing; compatible with standard microprocessor address lines |
| DQ0–DQ7 | Data I/O | Bidirectional 8-bit data bus; high-impedance during write cycles when OE is high to prevent bus contention |
| CE | Chip Enable | Active-low chip select; must be low with WE low to initiate write; controls output enable timing (tCO = 70 ns) |
| WE | Write Enable | Active-low write strobe; falling edge (with CE low) defines write start; tWP = 55 ns minimum pulse width |
| OE | Output Enable | Active-low output control; high during writes to maintain high-Z outputs; tOE = 35 ns access to valid data |
| VCC | Power Supply | +5V supply input; monitored continuously for out-of-tolerance condition triggering automatic backup switchover |
| GND | Ground | Signal and power reference plane; two dedicated pins (pins 17 and 32) reduce ground bounce in high-speed operation |
| NC | No Connect | Pins 1 and 33 are unconnected; no internal bonding or function - must remain floating or grounded per layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Automatic Power-Fail Response | Switches to lithium backup and enables write protection within 1.5 µs of VCC dropping below 4.25V - prevents corruption during brownouts |
| Freshness Seal | Lithium cell electrically disconnected until first VCC application >4.25V - ensures full 10-year retention capacity at installation |
| JEDEC-Compatible Interface | Standard SRAM timing (tRC = 70 ns, tWC = 70 ns) and pinout - drop-in replacement for existing 32-pin DIP designs using adapter PCB or socket |
| Industrial Temperature Support | Full functionality and data retention validated from –40°C to +85°C - suitable for outdoor infrastructure and factory-floor equipment |
| Zero External Support Circuitry | Integrated voltage monitor, switch, and backup management - eliminates discrete diodes, regulators, or capacitors required by external battery solutions |
Applications
| Industrial Data Logger | Avionics Black Box |
|---|---|
Use Scenario: Continuous recording of sensor readings (temperature, pressure, vibration) in remote substations with unreliable grid power. IC Role / Device Role / Timing Role: Nonvolatile SRAM buffer storing up to 512 kB of pre-trigger and post-event data; retains contents during 100+ ms outages. Use Value: Eliminates need for EEPROM wear-leveling firmware and reduces log write latency by 90% vs. Flash-based alternatives. |
Use Scenario: Crash-protected flight parameter storage in commercial aircraft, capturing 25+ hours of telemetry prior to impact. IC Role / Device Role / Timing Role: Primary memory for DFDR (Digital Flight Data Recorder) subsystem; powered by aircraft bus but backed by internal lithium during crash-induced power loss. Use Value: Guarantees data integrity under extreme shock/vibration due to monolithic PCM construction and no external battery wiring. |
| Medical Diagnostic Equipment | Energy Meter Firmware Storage |
Use Scenario: Storing calibration coefficients and patient session history in portable ultrasound devices subject to frequent on/off cycling. IC Role / Device Role / Timing Role: Configuration and context memory holding device-specific settings and last-used parameters across cold starts. Use Value: Enables instant resume without boot-time EEPROM reads; supports unlimited recalibration writes without endurance limits. |
Use Scenario: Tamper-resistant firmware and tariff table storage in smart electricity meters deployed in harsh outdoor environments. IC Role / Device Role / Timing Role: Secure nonvolatile memory for meter OS code and billing logic, operating continuously at –40°C to +85°C with no refresh cycles. Use Value: Meets ANSI C12.1 and IEC 62056 requirements for 10-year data retention without periodic maintenance or battery replacement. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar nonvolatile SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DS1250Y-70IND+ | Same 524,288×8 organization, 70ns speed, and –40°C to +85°C rating, but uses 32-pin EDIP package instead of PCM | Requires wave/hand soldering only; not reflow-compatible; no snap-on battery - lithium integrated permanently | Select DS1250Y-70IND+ for through-hole legacy designs or where board space permits full DIP footprint |
| STK15C88-70I | 512k×8 nvSRAM with 70ns access, but uses external capacitor-based backup and lacks integrated lithium; max retention ~1 month at +25°C | Suitable only for short-duration hold-up; requires external 0.1F supercapacitor and charge circuitry | Select STK15C88-70I only if cost sensitivity outweighs retention requirement and board area allows capacitor placement |
Compared with DS1250Y-70IND+, the DS1250YP-70IND offers reflow-solderable assembly and field-replaceable battery via DS9034PCI+, while STK15C88-70I trades guaranteed 10-year retention for lower BOM cost and simpler sourcing - making DS1250YP-70IND optimal for long-life, maintenance-free deployments.
Availability
DS1250YP-70IND is available at Aetrix Electronics and suitable for industrial data loggers, avionics black boxes, and medical diagnostic equipment requiring stable component supply across extended product lifecycles.
Supply support for DS1250YP-70IND 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 solutions for demanding industrial, automotive, and communications applications.
The DS1250YP-70IND belongs to Maxim's nonvolatile SRAM product line, engineered specifically for systems requiring deterministic data retention during unpredictable power failures without firmware intervention.
FAQ
What is the guaranteed data retention period for DS1250YP-70IND?
The DS1250YP-70IND guarantees a minimum of 10 years of data retention in the absence of external power, measured from the time VCC is first applied above 4.25V. This specification is assured by component selection, process control, and design - not production-tested per unit - and applies across the full –40°C to +85°C industrial temperature range.
Does DS1250YP-70IND require external support components for battery backup operation?
No, the DS1250YP-70IND requires no external support components. Its integrated lithium energy source, voltage monitor, and power-switching circuitry operate autonomously. The DS9034PCI+ PowerCap snaps onto the module base after reflow soldering, completing the nonvolatile system without discrete diodes, regulators, or capacitors.
Can DS1250YP-70IND be used as a direct replacement for standard 512k×8 SRAMs?
Yes, the DS1250YP-70IND provides pin-compatible read/write timing (tACC = 70 ns, tRC = 70 ns) and identical 524,288×8 organization to industry-standard 512k×8 SRAMs. Its CE/WE/OE interface follows JEDEC SRAM protocols, allowing drop-in replacement in existing designs - though the 34-pin PCM footprint requires adapter layout or socket conversion from 32-pin DIP.
What is the write protection voltage threshold for DS1250YP-70IND?
The DS1250YP-70IND uses the DS1250Y variant's write protection threshold: it unconditionally enables write protection when VCC falls below 4.25V (typical 4.37V, max 4.5V). This threshold is factory-trimmed and remains stable over temperature and lifetime, ensuring reliable data safeguarding during brownouts.
Is the lithium battery in DS1250YP-70IND replaceable in the field?
Yes, the lithium battery is replaceable via the DS9034PCI+ PowerCap, which snaps onto the DS1250YP-70IND module base using a keyed mechanical interface. Detachment is performed with a standard screwdriver using the built-in release feature - enabling field-level battery renewal without desoldering or module replacement.
DS1250YP-70IND 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:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 34-PowerCap Module
DS1250YP-70IND FAQ
1.How can I place an order for DS1250YP-70IND through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1250YP-70IND 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-70IND reliable?
The price and inventory of DS1250YP-70IND are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS1250YP-70IND is usually 5 days.
3.What payment methods are accepted for DS1250YP-70IND?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1250YP-70IND transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1250YP-70IND?
DS1250YP-70IND orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1250YP-70IND 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-70IND?
For technical support, including DS1250YP-70IND datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1250YP-70IND requirements.
6.How does Aetrix verify that DS1250YP-70IND is sourced from the original manufacturer or authorized distributors?
All DS1250YP-70IND 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-70IND meets industry standards.
7.What is the process for return or replacement of DS1250YP-70IND?
All DS1250YP-70IND units undergo pre-shipment inspection (PSI). If there is an issue with DS1250YP-70IND, 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-70IND part is unused and in its original packaging.
Return procedure for DS1250YP-70IND:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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