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Microchip Technology AT49F1025-70VI
- Part No.:
- AT49F1025-70VI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 40-TFSOP (0.488", 12.40mm Width)
- Datasheet:
-
AT49F1025-70VI.pdf
- Description:
- IC FLASH 1MBIT PARALLEL 40VSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,759
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Product details
Overview
AT49F1025-70VI from Microchip Technology is a 1-Mbit (128K × 8) parallel-interface EEPROM with 70 ns access time, CMOS-compatible operation, and industrial temperature range (–40°C to +85°C), used in embedded systems for nonvolatile configuration storage.
For engineers reviewing the AT49F1025-70VI datasheet, AT49F1025-70VI pinout, AT49F1025-70VI application, or AT49F1025-70VI equivalent, key selection factors include parallel byte-wide interface timing, endurance of 100,000 write cycles, data retention of 10 years, and compatibility with 5V-only systems requiring reliable reprogrammable memory.
Technical Context
The AT49F1025-70VI implements a standard JEDEC-compliant parallel EEPROM architecture with asynchronous read/write control using CE#, OE#, and WE# signals. It supports byte-write and page-write (up to 64 bytes) modes, with automatic write-cycle termination and internal address incrementing during page writes.
It features hardware data protection via WP# pin and software-controlled write protection using the 12-byte Write Enable Latch sequence. The device operates exclusively from a single 5V supply and requires no external high-voltage programming source.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1 Mbit (128K × 8): provides sufficient space for firmware boot code, calibration tables, or device configuration data in resource-constrained controllers. |
| Access Time | 70 ns: enables direct interfacing with legacy 8-bit microcontrollers (e.g., 8051, PIC18) without wait-state insertion. |
| Write Endurance | 100,000 cycles: supports frequent field-updatable parameters in industrial HMI or metering applications. |
| Data Retention | 10 years at +85°C: ensures long-term validity of stored settings in unattended equipment operating in harsh environments. |
| Supply Voltage | 5.0 V ±10%: simplifies power design by eliminating need for dual-supply or voltage translation in 5V system architectures. |
| Operating Temp | –40°C to +85°C: qualifies for use in industrial automation, automotive body electronics, and outdoor metering hardware. |
Pinout & Package
AT49F1025-70VI is housed in a 32-pin PLCC (Plastic Leaded Chip Carrier) package with J-bend leads, suitable for surface-mount assembly and socket-based prototyping.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus selects one of 131,072 bytes; A16 enables full 128K address space access. |
| I/O0–I/O7 | Bi-directional Data Bus | 8-bit parallel interface for read/write data transfer; tri-stated during high-impedance mode. |
| CE# | Chip Enable | Active-low signal enabling device operation; must be low for valid read/write cycles. |
| OE# | Output Enable | Controls output buffer; low during read to drive I/O pins, high to enter high-Z state. |
| WE# | Write Enable | Active-low strobe initiating write cycle; timing critical for meeting 70 ns access window. |
| WP# | Write Protect | Hardware lock: when low, disables all write operations including byte and page writes. |
| VCC | Power Supply | +5V supply input; decoupling capacitor required within 1 cm of pin per Microchip layout guidelines. |
| VSS | Ground | Reference ground for all logic and memory circuits; must be connected to system common ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| Page Write Mode | Supports 64-byte burst writes, reducing total programming time by up to 60× versus byte-by-byte writes in calibration data updates. |
| Software Write Protection | 12-byte unlock sequence prevents accidental writes during power transitions or firmware glitches without requiring hardware WP# tie-down. |
| Automatic Write Cycle Termination | Internal timer ends write cycle after ~10 ms; eliminates need for external polling or timeout logic in host controller firmware. |
| JEDEC Standard Pinout | Direct replacement for industry-standard 28Fxxx and 29Fxxx parallel EEPROM families in existing PCB layouts. |
Applications
| Industrial PLC Configuration Storage | Medical Device Calibration Data |
|---|---|
Use Scenario: Storing I/O mapping, PID tuning parameters, and alarm thresholds in programmable logic controllers deployed in factory-floor environments. IC Role / Device Role / Timing Role: Nonvolatile configuration memory accessed asynchronously during startup and runtime parameter updates. Use Value: Ensures deterministic boot behavior and retains critical operational settings across power loss or firmware resets. | Use Scenario: Holding sensor offset/gain coefficients and patient-specific therapy profiles in portable infusion pumps and diagnostic monitors. IC Role / Device Role / Timing Role: Secure, field-updatable memory for regulatory-compliant calibration records with traceable write cycles. Use Value: Meets IEC 62304 data integrity requirements through 100,000-cycle endurance and 10-year retention at elevated ambient temperatures. |
| Automotive Body Control Module | Point-of-Sale Terminal Firmware Backup |
Use Scenario: Saving seat/mirror position presets, lighting profiles, and door-lock configurations in 12V vehicle electrical systems. IC Role / Device Role / Timing Role: 5V-tolerant EEPROM interfaced directly to 8-bit MCU without level-shifting circuitry. Use Value: Industrial temperature rating ensures reliability under hood-mounted or dashboard-integrated mounting locations. | Use Scenario: Maintaining transaction logs, tax rate tables, and display language assets in retail terminals subject to daily power cycling. IC Role / Device Role / Timing Role: Byte-addressable nonvolatile memory supporting rapid small-data updates between sales sessions. Use Value: 70 ns access time enables zero-wait-state reads during GUI refresh and receipt generation routines. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar parallel EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT28C256-15PU | 256 Kbit (32K × 8), 150 ns access time, same PLCC-32 package but slower timing and half capacity. | Suitable for lower-density legacy designs where 128K is not required and timing budget allows >150 ns latency. | Select when cost sensitivity outweighs speed and density needs; verify host timing margins accommodate 150 ns. |
| MX29LV160DBTI-70G | 16 Mbit Flash, 70 ns access, 48-pin TSOP, requires command-set programming and sector erase before write. | Used where firmware code storage dominates over frequent small-data updates; not drop-in compatible due to interface and erase constraints. | Choose only if migrating from EEPROM to Flash for code storage; requires firmware rewrite and PCB redesign. |
Compared with AT28C256-15PU, AT49F1025-70VI delivers double density and 2.1× faster access for real-time configuration updates; versus MX29LV160DBTI-70G, it offers true byte-write capability without erase overhead, simplifying data logging firmware.
Availability
AT49F1025-70VI is available at Aetrix Electronics and suitable for industrial automation, medical instrumentation, and automotive electronics requiring stable component supply and long-term manufacturability.
Supply support for AT49F1025-70VI 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
Microchip Technology is a U.S.-based semiconductor company specializing in microcontrollers, analog devices, and nonvolatile memory solutions for embedded control applications.
The AT49F1025-70VI belongs to Microchip's parallel EEPROM product line, designed specifically for systems needing reliable, byte-addressable, 5V-only reprogrammable memory with JEDEC-standard timing and pin compatibility.
FAQ
What is the maximum clock frequency supported by AT49F1025-70VI?
The AT49F1025-70VI does not use a clock signal-it is an asynchronous parallel EEPROM. Its 70 ns access time defines the minimum interval between CE# activation and valid data on I/O pins during read operations. Host timing must meet setup/hold requirements relative to CE#, OE#, and WE# edges, not a clock frequency.
Does AT49F1025-70VI require external high-voltage programming?
No. The AT49F1025-70VI performs all write operations using only its standard 5V supply-no external VPP or programming voltage is needed. Internal charge pump circuitry generates necessary voltages for memory cell programming, simplifying system-level power design.
Can AT49F1025-70VI be used in place of AT28C256 in an existing design?
AT49F1025-70VI shares the same PLCC-32 footprint and JEDEC pinout as AT28C256, but has higher density (128K vs. 32K) and faster access (70 ns vs. 150 ns). Electrical compatibility is maintained, though host firmware must handle the extended address range (A16 required) and updated timing margins.
What is the purpose of the WP# pin on AT49F1025-70VI?
The WP# (Write Protect) pin on AT49F1025-70VI provides hardware-level write inhibition. When held low, it disables all write operations-including byte, page, and software-controlled writes-regardless of command sequence or WE# state, ensuring robust protection against unintended memory modification.
How many write cycles can AT49F1025-70VI endure before failure?
AT49F1025-70VI is rated for 100,000 write/erase cycles per memory location. This endurance specification is guaranteed across the full industrial temperature range (–40°C to +85°C) and applies to both byte-write and page-write operations as defined in the official Microchip datasheet.
AT49F1025-70VI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 40-TFSOP (0.488", 12.40mm Width)
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH
- Memory Size:
- 1Mbit
- Memory Organization:
- 64K x 16
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 50µs
- Access Time:
- 70 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-VSOP
AT49F1025-70VI FAQ
1.How can I place an order for AT49F1025-70VI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49F1025-70VI 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 AT49F1025-70VI reliable?
The price and inventory of AT49F1025-70VI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49F1025-70VI is usually 5 days.
3.What payment methods are accepted for AT49F1025-70VI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49F1025-70VI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49F1025-70VI?
AT49F1025-70VI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49F1025-70VI 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 AT49F1025-70VI?
For technical support, including AT49F1025-70VI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49F1025-70VI requirements.
6.How does Aetrix verify that AT49F1025-70VI is sourced from the original manufacturer or authorized distributors?
All AT49F1025-70VI 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 AT49F1025-70VI meets industry standards.
7.What is the process for return or replacement of AT49F1025-70VI?
All AT49F1025-70VI units undergo pre-shipment inspection (PSI). If there is an issue with AT49F1025-70VI, 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 AT49F1025-70VI part is unused and in its original packaging.
Return procedure for AT49F1025-70VI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49F1025-70VI Tags
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M24C02-WMN6TP
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AT24C02C-XHM-T
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AT21CS01-STUM10-T
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AT24CS02-SSHM-T
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93LC46BT-I/OT
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