My Inquiry
My Account
Analog Devices Inc./Maxim Integrated DS1245WP-100+
- Part No.:
- DS1245WP-100+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Memory
- Package:
- 34-PowerCap™ Module
- Datasheet:
-
DS1245WP-100+.pdf
- Description:
- IC NVSRAM 1MBIT PAR 34PWRCAP
- Quantity:
- Payment:
- Shipping:
Inventory:2,898
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
DS1245WP-100+ from Maxim Integrated is a 3.3V, 1024k-bit (131,072 × 8) nonvolatile static RAM with lithium-backed data retention, 100ns read/write access time, JEDEC-standard 34-pin PowerCap Module (PCM) package, and automatic power-loss write protection. It replaces volatile SRAM, EEPROM, or Flash in battery-free embedded systems requiring guaranteed 10-year data retention without external support circuitry.
For engineers reviewing the DS1245WP-100+ datasheet, DS1245WP-100+ pinout, DS1245WP-100+ application, or DS1245WP-100+ equivalent, key selection criteria include nonvolatile backup timing behavior, VCC fail-detect threshold (2.8–3.0V), PCM surface-mount compatibility, and industrial-grade temperature option availability.
Technical Context
The DS1245WP-100+ integrates SRAM, lithium battery, and autonomous power-fail detection/switching logic into a single module base. Its control circuitry monitors VCC continuously and triggers seamless switchover to lithium backup when voltage drops below ~2.8V, disabling all inputs and placing outputs in high-Z state.
It operates fully statically with no refresh required, supports standard parallel bus timing (tACC = 100ns, tWC = 100ns), and uses a standardized pinout compatible across Maxim's nonvolatile SRAM family. The PCM architecture separates reflow-soldered module base from snap-on DS9034PC+ PowerCap to avoid thermal damage to the lithium cell.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1,048,576-bit (131,072 × 8) - supports byte-wide microprocessor interfaces without address decoding overhead |
| Access Time | 100ns - enables direct replacement of 128k×8 SRAMs in legacy 32-bit bus systems |
| Data Retention | 10 years minimum without power - guaranteed from first VCC application, enabled by freshness seal disconnect |
| VCC Fail Threshold | 2.8V to 3.0V - initiates automatic write protection before data corruption occurs during brownout |
| Supply Voltage | 3.0V to 3.6V - compliant with 3.3V ±10% industrial logic rails |
| Operating Temp | 0°C to +70°C - commercial grade; IND variant available for -40°C to +85°C operation |
| Write Cycles | Unlimited - eliminates endurance concerns present in EEPROM/Flash alternatives |
Pinout & Package
DS1245WP-100+ uses a 34-pin PowerCap Module (PCM) package: surface-mountable module base with keyed contacts for snap-on DS9034PC+ PowerCap. Lithium cell is thermally isolated from reflow soldering process.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus supporting full 131,072-word addressing; TTL-compatible input thresholds |
| DQ0–DQ7 | Data I/O | Bi-directional 8-bit data bus; high-impedance output during write or chip deselect |
| CE | Chip Enable | Active-low chip select; controls internal enable/disable of memory array and I/O drivers |
| WE | Write Enable | Active-low write strobe; determines write cycle start/stop with CE; disables outputs when asserted |
| OE | Output Enable | Active-low output control; allows read data to appear on DQ lines only when CE and OE both low |
| VCC | Power Supply | +3.3V supply input; powers SRAM core and control logic; monitored for fail detection |
| GND | Ground | Reference return path for all signals and power; must be low-impedance for noise immunity |
| VBAT | Lithium Backup | Internal connection to DS9034PC+ battery; electrically disconnected until first VCC application |
| NC | No Connect | Pins 1, 2, 33, 34 - unused; must remain unconnected per datasheet |
Key Features
| Feature | Design Value |
|---|---|
| Automatic Power-Fail Protection | Hardware-level VCC monitoring triggers immediate write disable and high-Z outputs at 2.8–3.0V, eliminating firmware dependency |
| Freshness Seal | Lithium source remains electrically disconnected until first VCC >3.0V, preserving full 10-year retention capacity from shipment |
| PCM Modular Architecture | Enables surface-mount assembly of SRAM base at 260°C, then mechanical snap-on of pre-tested DS9034PC+ battery module |
| Standardized Pinout | Shared pin assignment across Maxim NV SRAM family simplifies PCB layout reuse and BOM consolidation |
| Zero Refresh Requirement | True static RAM core eliminates periodic refresh cycles, reducing CPU overhead and system timing complexity |
Applications
| Industrial Data Logger | Medical Device Memory |
|---|---|
Use Scenario: Standalone environmental sensor node recording temperature/humidity every 5 minutes, powered intermittently by solar charge controller. IC Role / Device Role / Timing Role: Nonvolatile SRAM storing last 72 hours of readings; retains data across multi-day power outages without capacitor hold-up. Use Value: Eliminates need for EEPROM wear-leveling firmware and guarantees deterministic 10-year retention without recalibration or battery replacement. | Use Scenario: Portable ECG monitor capturing waveform snapshots during patient transport, where main power may be interrupted during battery swaps. IC Role / Device Role / Timing Role: Buffer memory holding up to 30 seconds of raw analog samples; instantly preserves critical diagnostic data on power loss. Use Value: Meets IEC 62304 Class C software safety requirements by ensuring zero data loss during unexpected power transitions. |
| Avionics Black Box | Smart Meter Firmware Storage |
Use Scenario: Crash-protected flight recorder logging aircraft telemetry, requiring guaranteed data integrity after impact-induced power failure. IC Role / Device Role / Timing Role: Primary nonvolatile storage for real-time telemetry buffer; activated automatically when 28V aircraft bus collapses below 2.8V. Use Value: Provides sub-microsecond VCC-fail response (tPD = 1.5µs), faster than any microcontroller-based backup scheme. | Use Scenario: Utility smart meter storing firmware update images and billing logs across seasonal grid outages lasting weeks. IC Role / Device Role / Timing Role: Secure, tamper-resistant code storage replacing NOR Flash; immune to write-cycle exhaustion during frequent OTA updates. Use Value: Enables unlimited field firmware upgrades without degradation risk-critical for 15+ year field deployment lifetimes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar nonvolatile SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DS1245W-100+ | 32-pin EDIP package; integrated lithium (no separate PowerCap); wave-solder only; same speed and retention | Suitable for through-hole legacy designs; not reflow-compatible; lacks modular serviceability | Select when retrofitting existing DIP footprints or avoiding secondary assembly step for PowerCap attachment |
| STK14CA8-330I5F | 3.3V 1Mbit nvSRAM; 32-pin SOIC; built-in battery; 100ns access; -40°C to +85°C rated | Surface-mount alternative with smaller footprint; no detachable battery; lower max operating current (35mA vs 50mA) | Select when board space is constrained and industrial temp range is mandatory, but modular battery replacement is not required |
Compared with DS1245W-100+ and STK14CA8-330I5F, DS1245WP-100+ uniquely enables reflow-soldered assembly plus field-replaceable battery via its PCM architecture-critical for high-reliability, long-lifecycle products requiring maintenance without board replacement.
Availability
DS1245WP-100+ is available at Aetrix Electronics and suitable for industrial data loggers, medical device buffers, avionics recorders, and smart meter firmware storage requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for DS1245WP-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 semiconductor company specializing in precision analog, mixed-signal, and power management ICs for industrial, medical, and communications applications.
The DS1245WP-100+ belongs to Maxim's nonvolatile SRAM product line, engineered to eliminate data loss in mission-critical systems where power interruption is unavoidable and firmware-based backup is insufficient.
FAQ
What is the function of the VBAT pin on the DS1245WP-100+?
The VBAT pin on the DS1245WP-100+ is an internal connection point to the lithium backup battery housed in the snap-on DS9034PC+ PowerCap. It remains electrically disconnected from the SRAM until the first application of VCC >3.0V, preserving full battery capacity. During power loss, the DS1245WP-100+ automatically switches to VBAT to maintain data integrity without external intervention.
Does the DS1245WP-100+ require external circuitry for nonvolatile operation?
No, the DS1245WP-100+ requires no external circuitry for nonvolatile operation. Its integrated control logic autonomously monitors VCC, triggers write protection below 2.8V, and switches to lithium backup-fully self-contained. Only the DS9034PC+ PowerCap (ordered separately) is needed to complete the module; no capacitors, supervisors, or firmware routines are necessary for data retention.
How does the DS1245WP-100+ differ from the DS1245W-100+?
The DS1245WP-100+ uses a 34-pin PowerCap Module (PCM) package designed for surface-mount reflow assembly, while the DS1245W-100+ uses a 32-pin EDIP package for through-hole mounting. The DS1245WP-100+ requires a separate DS9034PC+ PowerCap for battery functionality, enabling field-replaceable backup power; the DS1245W-100+ integrates the battery internally and is wave-solder only.
What is the significance of the "+" suffix in DS1245WP-100+?
The "+" suffix in DS1245WP-100+ indicates a lead(Pb)-free and RoHS-compliant package. This applies to both the 34-pin PCM module base and the companion DS9034PC+ PowerCap. The "+" does not denote speed grade or temperature range-it solely certifies compliance with EU RoHS Directive 2011/65/EU and related environmental standards.
Can the DS1245WP-100+ operate at 2.5V or 5V supply voltages?
No, the DS1245WP-100+ is specified exclusively for 3.3V ±0.3V operation (3.0V to 3.6V). It will not function reliably outside this range: below 3.0V, the device enters data retention mode and disables all I/O; above 3.6V, it exceeds absolute maximum ratings and risks permanent damage. It is not backward-compatible with 5V TTL or forward-compatible with 2.5V logic families.
DS1245WP-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:
- 1Mbit
- Memory Organization:
- 128K 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
DS1245WP-100+ FAQ
1.How can I place an order for DS1245WP-100+ through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1245WP-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 DS1245WP-100+ reliable?
The price and inventory of DS1245WP-100+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS1245WP-100+ is usually 5 days.
3.What payment methods are accepted for DS1245WP-100+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1245WP-100+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1245WP-100+?
DS1245WP-100+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1245WP-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 DS1245WP-100+?
For technical support, including DS1245WP-100+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1245WP-100+ requirements.
6.How does Aetrix verify that DS1245WP-100+ is sourced from the original manufacturer or authorized distributors?
All DS1245WP-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 DS1245WP-100+ meets industry standards.
7.What is the process for return or replacement of DS1245WP-100+?
All DS1245WP-100+ units undergo pre-shipment inspection (PSI). If there is an issue with DS1245WP-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 DS1245WP-100+ part is unused and in its original packaging.
Return procedure for DS1245WP-100+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DS1245WP-100+ Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
-
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
-
24LC01BT-I/SN
Microchip Technology
-
24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
