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Microchip Technology 25LC512T-E/MF
- Part No.:
- 25LC512T-E/MF
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-VDFN Exposed Pad
- Datasheet:
-
25LC512T-E/MF.pdf
- Description:
- IC EEPROM 512KBIT SPI 20MHZ 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,242
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Product details
Overview
25LC512T-E/MF from Microchip Technology Inc. is a 512 Kbit (65,536-byte) SPI bus serial EEPROM with byte- and page-write capability, 128-byte page size, 20 MHz max clock speed, and deep power-down mode consuming only 1 µA at 2.5V. It operates across -40°C to +125°C and supports hardware write protection via WP pin and STATUS register configuration for industrial and automotive systems.
For engineers reviewing the 25LC512T-E/MF datasheet, 25LC512T-E/MF pinout, 25LC512T-E/MF application, or 25LC512T-E/MF equivalent, key selection criteria include its AEC-Q100 qualification, 1 million erase/write endurance, sector-level write protection granularity, and HOLD pin support for interrupt-safe SPI transaction suspension.
Technical Context
The 25LC512T-E/MF implements a true SPI-compatible interface with separate SI (data in) and SO (data out) lines, supporting Mode 0,0 and Mode 1,1 clock polarity/phase configurations. Its internal architecture includes an 8-bit instruction register, page latches, HV generator, and EEPROM array organized into 16 sectors of 4 KB each.
It features three nonvolatile erase modes-Page Erase (5 ms), Sector Erase (10 ms), and Chip Erase (10 ms)-all self-timed and independent of external timing control. Write operations require explicit WREN instruction and CS high-to-low transition to initiate internal write cycles, with WIP bit polling supported during active programming.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 512 Kbit (65,536 bytes), organized as 16 sectors × 4 KB, enabling granular firmware/data partitioning |
| Page Size | 128 bytes - defines maximum contiguous write length without wraparound; requires software boundary checking |
| Max Clock Frequency | 20 MHz at VCC ≥ 4.5V - enables high-throughput configuration storage in real-time systems |
| Write Endurance | 1 million erase/write cycles per page - supports long-life logging and parameter retention in field-deployed devices |
| Data Retention | >200 years at 25°C - ensures reliable nonvolatile storage for safety-critical or infrequently updated settings |
| Deep Power-Down Current | 1 µA at 2.5V, 85°C - allows ultra-low-power battery-backed operation in always-on edge nodes |
| Operating Temperature | -40°C to +125°C (Extended grade) - qualified for under-hood automotive and industrial control environments |
Pinout & Package
25LC512T-E/MF is housed in an 8-lead DFN-S package (3 mm × 2 mm, 0.5 mm pitch) with exposed pad (optional VSS connection). Pin functions are electrically identical to SOIC/SOIJ/PDIP variants but optimized for space-constrained PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select Input | Active-low enable; forces SO to high-impedance when deasserted, enabling multi-device SPI bus sharing |
| SO | Serial Data Output | Tri-state output synchronized to SCK falling edge; supports daisy-chaining in read-only configurations |
| WP | Write-Protect Pin | Hardware lock for STATUS register writes when WPEN=1; provides tamper-resistant configuration lockdown |
| VSS | Ground | Reference return path for all I/O and core logic; exposed pad enhances thermal dissipation and EMI performance |
| SI | Serial Data Input | Latches data/instructions on SCK rising edge; supports MSB-first SPI protocol without firmware bit-reversal |
| SCK | Serial Clock Input | Asynchronous master-controlled clock; rise/fall times ≤20 ns required for 20 MHz operation |
| HOLD | Hold Input | Pauses ongoing SPI transfer without reset; allows host MCU to service higher-priority interrupts mid-sequence |
| VCC | Supply Voltage | 2.5–5.5V operation range - compatible with 3.3V and 5V logic domains without level-shifting |
Key Features
| Feature | Design Value |
|---|---|
| Page, Sector, and Chip Erase | Independent 5 ms / 10 ms / 10 ms erase times - eliminates need for full-array erasure before partial updates |
| Hardware Write Protection | WP pin + WPEN bit dual-control - prevents accidental overwrites while allowing dynamic enable/disable in runtime |
| Deep Power-Down Mode | 1 µA standby current with RDID wake-up - enables secure, low-leakage storage during system sleep states |
| Electronic Signature Readout | 8-bit device ID via RDID command - supports automated BOM verification and counterfeit detection in production test |
| AEC-Q100 Qualification | Grade 1 (-40°C to +125°C) compliance - validated for automotive powertrain, body control, and ADAS subsystems |
Applications
| Automotive Body Control Module | Industrial PLC Configuration Storage |
|---|---|
Use Scenario: Storing calibration data, door lock patterns, and lighting profiles across vehicle life cycles. IC Role / Device Role / Timing Role: Nonvolatile parameter repository interfaced directly to PIC® MCU SPI port with HOLD-assisted interrupt handling. Use Value: AEC-Q100 qualification and 200-year data retention ensure reliability over 15+ year vehicle service life without refresh. |
Use Scenario: Retaining I/O mapping, PID tuning constants, and firmware update metadata in factory automation controllers. IC Role / Device Role / Timing Role: SPI-configurable memory with sector protection isolating critical firmware parameters from user-modifiable settings. Use Value: 16-sector architecture enables independent write-locking of safety-critical registers while permitting field updates to operational parameters. |
| Medical Infusion Pump Settings | Smart Energy Meter Firmware Patch Storage |
Use Scenario: Securing drug library limits, dose history, and clinician access logs in battery-powered portable devices. IC Role / Device Role / Timing Role: Deep power-down enabled storage with WP-driven hardware lock preventing unauthorized reprogramming. Use Value: 1 µA deep-sleep current extends battery life between charges; electronic signature validates firmware integrity pre-boot. |
Use Scenario: Holding encrypted firmware patches and cryptographic keys for OTA updates in utility-grade meters. IC Role / Device Role / Timing Role: SPI EEPROM with chip-erase capability used as secure patch staging area prior to main flash update. Use Value: 1 million endurance cycles support frequent patch deployments over 10+ year meter lifetime; RDID enables supply-chain traceability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT25DF512C-SSH-T | 512 Kbit SPI NOR Flash with 4-KB sectors; no byte-write; requires sector erase before write | Higher density per pin count but lacks true EEPROM semantics; unsuitable for frequent small writes | Select only if firmware storage dominates over parameter logging and erase/write latency is acceptable |
| BR25L512FJ-WE2 | 512 Kbit SPI EEPROM; 1.7–5.5V VCC; 10 MHz max clock; 100-year data retention; JEDEC-standard 8-pin SOP | Broader voltage range and JEDEC package, but lower speed and shorter retention than 25LC512T-E/MF | Prefer for cost-sensitive industrial designs where 20 MHz throughput and AEC-Q100 are not required |
Compared with AT25DF512C-SSH-T and BR25L512FJ-WE2, the 25LC512T-E/MF uniquely combines automotive qualification, 20 MHz SPI speed, and true byte-write capability-making it optimal for real-time parameter logging in safety-critical embedded systems where latency, endurance, and temperature resilience are non-negotiable.
Availability
25LC512T-E/MF is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLCs, medical infusion pumps, and smart energy meters requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for 25LC512T-E/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 U.S.-based semiconductor manufacturer specializing in microcontrollers, analog devices, and memory solutions for embedded control applications.
The 25LC512T-E/MF belongs to Microchip's serial EEPROM product line, designed specifically for robust, low-power, high-reliability nonvolatile storage in automotive, industrial, and medical systems demanding AEC-Q100 compliance and extended temperature operation.
FAQ
What is the operating voltage range for the 25LC512T-E/MF?
The 25LC512T-E/MF operates across 2.5V to 5.5V, supporting both 3.3V and 5V logic domains without level shifters. This wide VCC range ensures compatibility with diverse host MCUs and simplifies power architecture design in mixed-voltage systems. The 25LC512T-E/MF maintains full functionality-including 20 MHz clock operation and deep power-down-at the minimum 2.5V supply.
Does the 25LC512T-E/MF support hardware write protection?
Yes, the 25LC512T-E/MF supports dual-layer hardware write protection: the WP pin can disable STATUS register writes when WPEN=1, and BP0/BP1 bits configure sector-level array protection (none, 1/4, 1/2, or full). This allows permanent lockdown of critical configuration blocks while permitting runtime updates to user-defined regions-essential for certified medical and automotive applications.
How does the HOLD pin function in the 25LC512T-E/MF?
The HOLD pin in the 25LC512T-E/MF suspends ongoing SPI communication without resetting the sequence-enabling the host MCU to service time-critical interrupts and resume exactly where it left off. It must be asserted while SCK is low; SO immediately tri-states upon HOLD assertion and resumes output on HOLD release, independent of SCK state. This behavior is confirmed in DS20002065D Figures 1-1 and 2-6.
What is the endurance rating of the 25LC512T-E/MF?
The 25LC512T-E/MF guarantees 1 million erase/write cycles per page at 25°C and 5.5V, as characterized and qualified per Microchip's standards. This endurance applies to both byte and page writes, with wear leveling managed by application firmware. Real-world endurance remains robust across the full -40°C to +125°C range, making the 25LC512T-E/MF suitable for high-frequency logging in harsh environments.
Is the 25LC512T-E/MF AEC-Q100 qualified?
Yes, the 25LC512T-E/MF is explicitly AEC-Q100 qualified for Grade 1 operation (-40°C to +125°C), as stated in the Device Selection Table on page 1 of DS20002065D. This qualification covers stress testing for temperature cycling, humidity bias, ESD, and other automotive reliability requirements-validating its use in engine control units, ADAS sensors, and body electronics without additional qualification effort.
25LC512T-E/MF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-VDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 512Kbit
- Memory Organization:
- 64K x 8
- Memory Interface:
- SPI
- Clock Frequency:
- 20 MHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- -
- Voltage - Supply:
- 2.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DFN-S (6x5)
25LC512T-E/MF FAQ
1.How can I place an order for 25LC512T-E/MF through Aetrix?
Please submit a Request for Quotation (RFQ) for 25LC512T-E/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 25LC512T-E/MF reliable?
The price and inventory of 25LC512T-E/MF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 25LC512T-E/MF is usually 5 days.
3.What payment methods are accepted for 25LC512T-E/MF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 25LC512T-E/MF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 25LC512T-E/MF?
25LC512T-E/MF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 25LC512T-E/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 25LC512T-E/MF?
For technical support, including 25LC512T-E/MF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 25LC512T-E/MF requirements.
6.How does Aetrix verify that 25LC512T-E/MF is sourced from the original manufacturer or authorized distributors?
All 25LC512T-E/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 25LC512T-E/MF meets industry standards.
7.What is the process for return or replacement of 25LC512T-E/MF?
All 25LC512T-E/MF units undergo pre-shipment inspection (PSI). If there is an issue with 25LC512T-E/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 25LC512T-E/MF part is unused and in its original packaging.
Return procedure for 25LC512T-E/MF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
25LC512T-E/MF 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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