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Microchip Technology 25AA1024-I/MF
- Part No.:
- 25AA1024-I/MF
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-VDFN Exposed Pad
- Datasheet:
-
25AA1024-I/MF.pdf
- Description:
- IC EEPROM 1MBIT SPI 20MHZ 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:167
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Product details
Overview
25AA1024-I/MF from Microchip Technology Inc. is a 1-Mbit (131,072-byte) SPI serial EEPROM with byte- and page-write capability, 256-byte page size, 6 ms max internal write cycle time, and industrial temperature range (–40°C to +85°C). It operates from 1.8V to 5.5V, supports up to 20 MHz clock at 4.5–5.5V, and features hardware write protection via WP pin and STATUS register control.
For engineers reviewing the 25AA1024-I/MF datasheet, 25AA1024-I/MF pinout, 25AA1024-I/MF application, or 25AA1024-I/MF equivalent, this device serves as a drop-in nonvolatile memory solution for firmware storage, calibration data retention, and configuration parameter backup in resource-constrained embedded systems requiring SPI interface compatibility and AEC-Q100-qualified reliability.
Technical Context
The 25AA1024-I/MF implements a true SPI Mode 0,0/1,1 interface with separate SI (data in) and SO (data out) lines, CS-controlled selection, and HOLD pin for transaction suspension without reset. Its internal architecture includes an 8-bit instruction register, page latches, HV generator for EEPROM programming, and status register with WIP, WEL, BP0/BP1, and WPEN bits.
It supports four erase granularities-byte (implicit), page (256 B, 6 ms), sector (32 KB, 10 ms), and chip-wide (10 ms)-all self-timed and requiring prior WREN activation. Write protection is configurable per sector (0–3) via BP0/BP1 bits and enforceable via hardware (WP pin + WPEN bit), while Deep Power-down mode reduces current to 1 µA at 2.5V/85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1 Mbit (131,072 bytes), organized as 512 pages × 256 bytes - enables efficient firmware patching and modular data logging |
| Interface | SPI-compatible serial bus (Mode 0,0 and 1,1), with dedicated SI/SO lines - eliminates need for bidirectional bus arbitration logic |
| Max Clock Frequency | 20 MHz at VCC ≥ 4.5V - supports high-throughput configuration loading in real-time systems |
| Write Cycle Time | 6 ms maximum for byte/page write or page erase - defines minimum latency between successive write commands |
| Supply Voltage Range | 1.8V to 5.5V - allows direct interfacing with 1.8V, 3.3V, and 5V microcontrollers without level-shifting |
| Endurance & Retention | 1 million erase/write cycles per page; >200 years data retention - suitable for field-updatable systems with infrequent but critical writes |
| Temperature Range | Industrial: –40°C to +85°C - qualified for automotive body electronics, industrial PLCs, and outdoor IoT nodes |
Pinout & Package
25AA1024-I/MF is packaged in an 8-lead DFN-S (exposed pad) with 3×3 mm footprint, pin-compatible with PDIP and SOIJ variants. The exposed pad may be connected to VSS or left floating for thermal or layout flexibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select Input | Active-low enable: selects device for SPI communication; forces SO into high-Z when deasserted to support multi-drop buses |
| SO | Serial Data Output | Tri-state output driven on SCK falling edge; transitions to high-Z within 15 ns of HOLD low assertion |
| WP | Write-Protect Pin | Hardware lock: disables STATUS register writes when WP = low and WPEN = 1 - prevents accidental configuration corruption |
| VSS | Ground | Reference node for all I/O and core logic; exposed pad connection improves thermal dissipation in DFN package |
| SI | Serial Data Input | Latches data/instructions on SCK rising edge; accepts MSB-first 8-bit opcodes, 24-bit addresses, and payload bytes |
| SCK | Serial Clock Input | Asynchronous master clock; timing-critical parameters include min 25 ns high/low time (at 4.5–5.5V) and 20 ns max rise/fall |
| HOLD | Hold Input | Pauses ongoing SPI transfer without resetting state; requires low assertion during SCK low phase to avoid metastability |
| VCC | Supply Voltage | Core and I/O power rail; supports deep power-down entry at 1.8V–5.5V with 1 µA standby current at 2.5V/85°C |
Key Features
| Feature | Design Value |
|---|---|
| Page-level write with 256-byte buffer | Enables burst programming of up to 256 bytes per CS pulse - reduces host CPU overhead vs. byte-by-byte writes |
| Four-tier sector write protection | BP0/BP1 bits allow locking 0%, 25%, 50%, or 100% of memory (32 KB sectors) - supports secure bootloader + user-app partitioning |
| Deep Power-down mode | 1 µA max ICCSPD at 2.5V/85°C - extends battery life in always-on sensor nodes and enables software-based write lockout |
| AEC-Q100 Grade 3 qualification | Validated for automotive applications including body control modules and telematics - meets stress test requirements for temperature cycling and ESD |
| Electronic signature read (RDID) | Verifies part identity and release from Deep Power-down in single command - simplifies factory programming and field diagnostics |
Applications
| Automotive Body Control Module | Industrial PLC Configuration Storage |
|---|---|
Use Scenario: Storing calibrated sensor offsets, actuator trim values, and fault history logs across ignition cycles in door module ECUs. IC Role / Device Role / Timing Role: Nonvolatile configuration memory interfaced directly to PIC® MCU SPI port; retains data during 12V brownout events. Use Value: Eliminates need for external backup capacitors or supercapacitors due to 1.8V operation and fast 6 ms write completion. |
Use Scenario: Holding ladder logic runtime parameters, I/O mapping tables, and firmware update staging buffers in DIN-rail mounted controllers. IC Role / Device Role / Timing Role: SPI EEPROM acting as persistent BOM-managed data store; accessed during boot and runtime via deterministic 20 MHz transfers. Use Value: 1M endurance ensures >10 years of daily parameter updates under industrial duty cycles without wear leveling. |
| Medical Infusion Pump Calibration | Smart Meter Firmware Patch Storage |
Use Scenario: Securing drug delivery calibration coefficients and usage audit trails compliant with IEC 62304 Class C software requirements. IC Role / Device Role / Timing Role: Tamper-resistant memory with hardware WP pin and BP bits - prevents unauthorized modification of safety-critical parameters. Use Value: WPEN-enabled hardware lock ensures calibration integrity even if firmware is compromised; ESD rating of 4 kV protects against handling damage. |
Use Scenario: Staging over-the-air firmware patches before atomic commit to main flash, enabling rollback on failed updates. IC Role / Device Role / Timing Role: High-reliability SPI buffer memory supporting sector-erase isolation - allows patch validation without disrupting active metering functions. Use Value: 10 ms sector erase time enables sub-second patch preparation; RoHS compliance meets global utility procurement mandates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 25LC1024-I/MF | Same pinout, identical timing and memory map, but uses older process - lower ESD rating (2.5 kV vs. 4 kV) and no AEC-Q100 qualification | Lacks automotive qualification and reduced robustness in noisy industrial environments | Select only for cost-sensitive non-automotive designs where ESD immunity < 4 kV is acceptable |
| AT25DF101-MAHN-T | Density-matched (1 Mbit) SPI DataFlash with 512-byte pages, 8-pin SOIC package, and integrated erase suspend - no HOLD pin or WPEN-controlled hardware write protect | Optimized for firmware code storage with execute-in-place (XIP) support; lacks fine-grained sector protection | Prefer for boot code shadowing; avoid when hardware-configurable write protection or HOLD functionality is required |
Compared with 25AA1024-I/MF, 25LC1024-I/MF offers identical functionality at lower cost but sacrifices automotive qualification and ESD robustness, while AT25DF101-MAHN-T trades hardware security features for faster sequential read performance and XIP capability - making each alternative suitable only for narrowly defined use cases.
Availability
25AA1024-I/MF is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLCs, medical infusion pumps, and smart metering systems requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant reliability.
Supply support for 25AA1024-I/MF 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 Inc. is a leading provider of microcontroller, analog, FPGA, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 25AA1024-I/MF belongs to Microchip's serial EEPROM product line, designed specifically for SPI-based embedded systems needing reliable, low-voltage, high-endurance nonvolatile storage with flexible hardware/software write protection.
FAQ
What is the maximum clock frequency supported by the 25AA1024-I/MF?
The 25AA1024-I/MF supports up to 20 MHz clock frequency when VCC is 4.5V to 5.5V. At 2.5V ≤ VCC < 4.5V, the maximum is 10 MHz, and at 2.0V ≤ VCC < 2.5V, it drops to 2 MHz. These limits are defined in Table 1-2 of the DS20001836K datasheet and ensure reliable setup/hold timing across voltage and temperature ranges. The 25AA1024-I/MF must be operated within these constraints to guarantee correct SPI communication and data integrity.
Does the 25AA1024-I/MF require external circuitry for write protection?
No, the 25AA1024-I/MF integrates dual-layer write protection: a hardware pin (WP) and a nonvolatile STATUS register bit (WPEN). When WP is low and WPEN is set, writes to the STATUS register are blocked - preventing accidental changes to sector protection bits (BP0/BP1). This eliminates the need for external logic or jumpers. The 25AA1024-I/MF remains fully functional for reads and unprotected writes even with WP asserted, making it ideal for field-deployed systems where physical access is restricted.
How does the HOLD function operate on the 25AA1024-I/MF?
The HOLD pin on the 25AA1024-I/MF suspends an ongoing SPI transaction without resetting the internal state. To activate HOLD, the pin must be pulled low while SCK is low; the SO line tri-states within 15 ns, and SI/SCK transitions are ignored until HOLD returns high - also during SCK low. This allows the host MCU to service higher-priority interrupts and resume exactly where it left off. The 25AA1024-I/MF specification guarantees this behavior across its full industrial temperature range and voltage window.
What is the endurance rating of the 25AA1024-I/MF, and how is it measured?
The 25AA1024-I/MF is rated for 1 million erase/write cycles per page, verified at 25°C and 5.5V using page-mode operations. Endurance is specified per physical page (256 bytes), not per byte, because partial-page writes still trigger full-page refresh. This rating ensures reliable operation in applications like calibration storage or event logging where writes occur daily over a decade. The 25AA1024-I/MF datasheet confirms this value in Table 1-2, Parameter D025, and ties it directly to page-level stress testing methodology.
Can the 25AA1024-I/MF be used in automotive applications?
Yes, the 25AA1024-I/MF is AEC-Q100 Grade 3 qualified (–40°C to +85°C), making it suitable for automotive body electronics, infotainment peripherals, and telematics modules. It meets stringent requirements for temperature cycling, humidity bias, and ESD (4 kV HBM). Its 1.8V–5.5V supply range accommodates automotive battery transients, and the Deep Power-down mode (1 µA) supports low-quiescent-current system architectures. The 25AA1024-I/MF part number explicitly denotes the automotive-qualified industrial grade.
25AA1024-I/MF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-VDFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 1Mbit
- Memory Organization:
- 128K x 8
- Memory Interface:
- SPI
- Clock Frequency:
- 20 MHz
- Write Cycle Time - Word, Page:
- 6ms
- Access Time:
- -
- Voltage - Supply:
- 1.8V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DFN-S (6x5)
25AA1024-I/MF FAQ
1.How can I place an order for 25AA1024-I/MF through Aetrix?
Please submit a Request for Quotation (RFQ) for 25AA1024-I/MF 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 25AA1024-I/MF reliable?
The price and inventory of 25AA1024-I/MF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 25AA1024-I/MF is usually 5 days.
3.What payment methods are accepted for 25AA1024-I/MF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 25AA1024-I/MF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 25AA1024-I/MF?
25AA1024-I/MF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 25AA1024-I/MF 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 25AA1024-I/MF?
For technical support, including 25AA1024-I/MF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 25AA1024-I/MF requirements.
6.How does Aetrix verify that 25AA1024-I/MF is sourced from the original manufacturer or authorized distributors?
All 25AA1024-I/MF 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 25AA1024-I/MF meets industry standards.
7.What is the process for return or replacement of 25AA1024-I/MF?
All 25AA1024-I/MF units undergo pre-shipment inspection (PSI). If there is an issue with 25AA1024-I/MF, 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 25AA1024-I/MF part is unused and in its original packaging.
Return procedure for 25AA1024-I/MF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
25AA1024-I/MF Tags
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M24C02-WMN6TP
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AT24C02C-XHM-T
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