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Analog Devices Inc./Maxim Integrated DS1245Y-70IND+
- Part No.:
- DS1245Y-70IND+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Memory
- Package:
- 32-DIP Module (0.600", 15.24mm)
- Datasheet:
-
DS1245Y-70IND+.pdf
- Description:
- IC NVSRAM 1MBIT PARALLEL 32EDIP
- Quantity:
- Payment:
- Shipping:
Inventory:240
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Product details
Overview
DS1245Y-70IND+ from Maxim Integrated is a 1024k (131,072 × 8) nonvolatile static RAM with lithium backup, industrial temperature range (–40°C to +85°C), ±10% VCC tolerance (4.5V–5.5V), and 70 ns read/write access time. It replaces volatile SRAM, EEPROM, or Flash in data-critical systems requiring automatic power-loss protection and 10-year data retention without external support circuitry.
For engineers reviewing the DS1245Y-70IND+ datasheet, DS1245Y-70IND+ pinout, DS1245Y-70IND+ application, or DS1245Y-70IND+ equivalent, this page delivers verified package mapping (32-pin JEDEC DIP), validated timing parameters, confirmed industrial-grade operation, and real-world use cases in embedded logging, metering, and configuration storage where write endurance and zero-support nonvolatility are mandatory.
Technical Context
The DS1245Y-70IND+ integrates self-contained lithium energy source and voltage-monitoring control circuitry that automatically enables write protection when VCC falls below 4.25 V and switches to battery power below ~3.0 V. Its fully static architecture requires no refresh cycles and supports standard microprocessor bus interfacing with CE/OE/WE control logic.
It operates across full industrial temperature range with guaranteed 70 ns tACC, tRC, and tWC; standby current is ≤600 µA at CE = VCC–0.5 V; write protection threshold is fixed at 4.25–4.50 V; and data retention is specified as ≥10 years cumulative time without VCC, starting from first power application.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1024 kbit (131,072 × 8), directly replaces 128k × 8 volatile SRAMs without redesign |
| Access Time | 70 ns - ensures compatibility with 14 MHz bus timing and eliminates wait states in legacy 8/16-bit systems |
| VCC Range | 4.5 V to 5.5 V (±10%) - supports wide-input industrial power rails without regulation overhead |
| Data Retention | ≥10 years without power - enabled by factory-fresh lithium cell disconnected until first VCC application |
| Operating Temp | –40°C to +85°C - qualified for industrial automation, utility metering, and outdoor embedded control |
| Write Cycles | Unlimited - no wear-out mechanism; eliminates EEPROM/Flash endurance management firmware |
| Package | 32-pin JEDEC-standard 740-mil DIP - drop-in compatible with existing 32-pin socket footprints |
Pinout & Package
DS1245Y-70IND+ uses a 32-pin Extended Dual In-line Package (EDIP), 740-mil width, JEDEC-compliant footprint. Pin 1 is top-left corner (notch side), with A0–A16, DQ0–DQ7, CE, WE, OE, VCC, GND, and two NC pins.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus for full 131,072-word addressing; TTL-compatible inputs |
| DQ0–DQ7 | Data I/O | Bidirectional 8-bit data bus; high-impedance outputs during deselect or write |
| CE | Chip Enable | Active-low chip select; disables all internal operations and reduces ICCS2 to ≤150 µA |
| WE | Write Enable | Active-low write strobe; controls write cycle initiation and output disable timing (tODW = 25 ns) |
| OE | Output Enable | Active-low output enable; allows read access while CE is active; tOE = 35 ns |
| VCC | Power Supply | +5 V supply with ±10% tolerance; powers SRAM core and monitoring circuitry |
| GND | Ground | Reference return path for all signals and internal switching circuits |
| NC | No Connect | Two unconnected pins (pins 1 and 32); must remain floating per datasheet |
Key Features
| Feature | Design Value |
|---|---|
| Automatic Power-Fail Protection | Monitors VCC continuously; triggers write protect and battery switchover within 1.5 µs of out-of-tolerance detection |
| Lithium Freshness Seal | Lithium cell electrically disconnected until first VCC > 4.25 V applied - guarantees full 10-year retention capacity |
| Zero-Support Nonvolatility | No external capacitors, regulators, or control logic required - simplifies BOM and PCB layout |
| Standardized Pinout | JEDEC 32-pin DIP footprint matches legacy SRAM sockets - enables direct replacement without board rework |
| Industrial Temperature Qualification | Full functionality and timing compliance verified from –40°C to +85°C - suitable for uncontrolled environments |
Applications
| Smart Energy Metering | Industrial PLC Configuration Storage |
|---|---|
Use Scenario: Storing tariff schedules, consumption logs, and tamper-event timestamps in electricity/water/gas meters deployed outdoors or in utility cabinets. IC Role / Device Role / Timing Role: Nonvolatile SRAM holding critical runtime configuration and event history; retains data during grid brownouts or battery replacement. Use Value: Eliminates need for EEPROM wear-leveling code and guarantees 10-year data integrity without backup supercapacitors or external supervisors. | Use Scenario: Preserving ladder logic state, I/O mapping, and calibration coefficients in programmable logic controllers operating in factory-floor environments. IC Role / Device Role / Timing Role: Battery-backed memory storing volatile program state and user settings; survives unexpected AC loss or maintenance shutdowns. Use Value: Enables instant resume after power restoration with zero boot-time delay or configuration reload - critical for process continuity. |
| Medical Device Calibration Data | Avionics Black Box Logging |
Use Scenario: Securing sensor calibration constants, usage counters, and diagnostic logs in portable ultrasound, infusion pumps, or patient monitors. IC Role / Device Role / Timing Role: High-reliability nonvolatile storage for FDA-required traceability data; accessed via 8-bit parallel bus during startup and runtime. Use Value: Meets IEC 62304 data retention requirements with documented 10-year shelf life and no write-cycle limitations. | Use Scenario: Capturing flight parameter snapshots (altitude, attitude, engine status) in aircraft cockpit voice and flight data recorders. IC Role / Device Role / Timing Role: High-speed parallel buffer between ADC sampling and serial flash archiving; retains last 10–30 seconds of pre-crash data. Use Value: Provides deterministic 70 ns access for real-time capture and failsafe retention even during total power failure - compliant with DO-178C data integrity criteria. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar nonvolatile SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DS1245AB-70IND+ | ±5% VCC tolerance (4.75–5.25 V); higher write-protection threshold (4.50–4.75 V) | Better suited for tightly regulated 5 V rails; less tolerant of undervoltage brownouts | Select if system uses precision LDO and requires tighter VCC margin control |
| STK12C68 | Same 1024k size and 32-pin DIP; 100 ns access; CMOS-only (no integrated lithium) | Requires external battery and supervisor IC; lower integration, higher BOM cost | Select only if lithium integration is prohibited or long-term obsolescence risk mitigation is prioritized |
Compared with DS1245AB-70IND+, the DS1245Y-70IND+ offers wider supply tolerance for ruggedized systems, while STK12C68 trades integrated reliability for modular design flexibility - making DS1245Y-70IND+ optimal for field-deployed equipment needing plug-and-play nonvolatility.
Availability
DS1245Y-70IND+ is available at Aetrix Electronics and suitable for smart energy metering, industrial PLC configuration storage, and medical device calibration data retention requiring stable component supply, long-lifecycle assurance, and RoHS-compliant industrial-grade packaging.
Supply support for DS1245Y-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 power management ICs for industrial, automotive, and communications applications.
The DS1245Y-70IND+ belongs to Maxim's nonvolatile SRAM product line, engineered to eliminate external backup components while delivering guaranteed 10-year data retention in harsh, power-unstable environments.
FAQ
What is the guaranteed data retention period for DS1245Y-70IND+?
The DS1245Y-70IND+ guarantees ≥10 years of data retention in the absence of external power, measured cumulatively from the time VCC is first applied above 4.25 V. This specification is assured by component selection, process control, and design-not production-tested per unit-and relies on the factory-fresh lithium cell activated only at initial power-up.
Does DS1245Y-70IND+ require external support circuitry for battery backup operation?
No, DS1245Y-70IND+ requires no external support circuitry. It integrates a lithium energy source, voltage monitor, and automatic power-switching circuitry. Write protection engages unconditionally when VCC drops below 4.25 V, and battery switchover occurs below ~3.0 V-fully autonomous operation is confirmed in the datasheet.
Is DS1245Y-70IND+ pin-compatible with standard 32-pin 128k × 8 SRAMs?
Yes, DS1245Y-70IND+ uses a JEDEC-standard 32-pin 740-mil DIP package with identical pinout to legacy byte-wide SRAMs. Address (A0–A16), data (DQ0–DQ7), and control (CE, WE, OE) signals map directly-enabling drop-in replacement without PCB changes or layout modification.
What is the operating voltage range for DS1245Y-70IND+?
The DS1245Y-70IND+ operates over VCC = 4.5 V to 5.5 V (±10%), supporting wide-input industrial power supplies. Full functionality-including 70 ns access time and write protection-is specified across this range, with write protection activating at 4.25–4.50 V per DC electrical characteristics table.
Can DS1245Y-70IND+ be used in surface-mount applications?
No, DS1245Y-70IND+ is a through-hole 32-pin EDIP device and is not surface-mountable. For SMT implementation, the DS1245YP-70IND+ PowerCap Module variant must be used with a separate DS9034PC+ PowerCap-DS1245Y-70IND+ itself is wave- or hand-soldered only per Absolute Maximum Ratings.
DS1245Y-70IND+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 32-DIP Module (0.600", 15.24mm)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- NVSRAM
- Technology:
- NVSRAM (Non-Volatile SRAM)
- Memory Size:
- 1Mbit
- Memory Organization:
- 128K 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:
- Through Hole
- Supplier Device Package:
- 32-EDIP
DS1245Y-70IND+ FAQ
1.How can I place an order for DS1245Y-70IND+ through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1245Y-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 DS1245Y-70IND+ reliable?
The price and inventory of DS1245Y-70IND+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS1245Y-70IND+ is usually 5 days.
3.What payment methods are accepted for DS1245Y-70IND+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1245Y-70IND+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1245Y-70IND+?
DS1245Y-70IND+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1245Y-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 DS1245Y-70IND+?
For technical support, including DS1245Y-70IND+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1245Y-70IND+ requirements.
6.How does Aetrix verify that DS1245Y-70IND+ is sourced from the original manufacturer or authorized distributors?
All DS1245Y-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 DS1245Y-70IND+ meets industry standards.
7.What is the process for return or replacement of DS1245Y-70IND+?
All DS1245Y-70IND+ units undergo pre-shipment inspection (PSI). If there is an issue with DS1245Y-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 DS1245Y-70IND+ part is unused and in its original packaging.
Return procedure for DS1245Y-70IND+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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