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Microchip Technology 25LC512-E/MF
- Part No.:
- 25LC512-E/MF
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-VDFN Exposed Pad
- Datasheet:
-
25LC512-E/MF.pdf
- Description:
- IC EEPROM 512KBIT SPI 20MHZ 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,352
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Product details
Overview
25LC512-E/MF from Microchip Technology Inc. is a 512 Kbit (65,536-byte) SPI 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 2.5 V. 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 25LC512-E/MF datasheet, 25LC512-E/MF pinout, 25LC512-E/MF application, or 25LC512-E/MF equivalent, this device is selected for nonvolatile data logging, configuration storage, and firmware parameter retention where SPI interface simplicity, sector-level erase flexibility, and AEC-Q100 qualification are required.
Technical Context
The 25LC512-E/MF implements a true SPI-compatible interface with separate SI (MOSI) and SO (MISO) lines, CS-controlled selection, and HOLD pin for mid-sequence 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/page write (no pre-erase), page erase (5 ms), sector erase (10 ms), and chip erase (10 ms)-all self-timed and interruptible via HOLD. Write protection is configurable per 16 KB sector (four sectors total), with hardware lock enabled only when WP = low and WPEN = 1 in STATUS register.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 512 Kbit (65,536 × 8-bit bytes), organized as 16 sectors × 4,096 bytes |
| Interface | SPI Mode 0,0 and 1,1 compatible; separate SI/SO, no bidirectional data line |
| Page Size | 128 bytes - maximum contiguous data that can be written in one page-write command |
| Max Clock Frequency | 20 MHz at VCC ≥ 4.5 V; 10 MHz at VCC ≥ 2.5 V - defines maximum SPI throughput |
| Write Endurance | 1 million erase/write cycles per page - enables long-term field data logging |
| Data Retention | >200 years at 25°C - ensures configuration integrity over product lifetime |
| Deep Power-Down Current | 1 µA at 2.5 V, 85°C - critical for battery-backed or energy-harvesting applications |
Pinout & Package
25LC512-E/MF uses an 8-lead DFN-S package (exposed pad, optional VSS connection). Pin functions are electrically identical across all 25LC512 variants, with pin 1 = CS, pin 2 = SO, pin 3 = WP, pin 4 = VSS, pin 5 = SI, pin 6 = SCK, pin 7 = HOLD, pin 8 = VCC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select Input | Active-low enable; forces SO to high-impedance when high, initiates internal write on rising edge after valid sequence |
| SO | Serial Data Output | MISO line; outputs memory data or STATUS register on falling SCK edge; tri-states immediately on HOLD low |
| WP | Write-Protect Input | Hardware lock control; effective only when WPEN bit = 1; disables STATUS register writes when low |
| VSS | Ground Reference | Primary return path for all I/O and core logic; exposed pad in DFN-S may be connected to VSS for thermal/EMI improvement |
| SI | Serial Data Input | MOSI line; latches instructions, addresses, and data on rising SCK edge |
| SCK | Serial Clock Input | Synchronizes all SPI transfers; timing-critical for setup/hold compliance per AC specs (e.g., Tsu = 5 ns min at 4.5–5.5 V) |
| HOLD | Hold Input | Pauses ongoing SPI transaction without resetting address pointer; requires SCK low before assertion; resumes on low-to-high transition |
| VCC | Supply Voltage | 2.5–5.5 V operation; powers EEPROM array, logic, and charge pump; deep power-down current specified at 2.5 V |
Key Features
| Feature | Design Value |
|---|---|
| Page, Sector & Chip Erase | Enables selective memory management without full-array erase - reduces wear and improves update latency vs. flash |
| Hardware Write Protection | Configurable per 16 KB sector (BP0/BP1) and enforced by WP pin + WPEN bit - prevents accidental overwrite in deployed systems |
| Deep Power-Down Mode | 1 µA standby current at 2.5 V with full write-protection - ideal for always-on IoT nodes and automotive modules |
| Electronic Signature Read (RDID) | 8-bit manufacturer ID accessible even from deep power-down - enables automated BOM verification and counterfeit detection |
| AEC-Q100 Qualified | Qualified for automotive Grade 1 (-40°C to +125°C) - validated for engine control, ADAS sensors, and infotainment backup storage |
Applications
| Automotive Telematics Logging | Industrial PLC Configuration Storage |
|---|---|
Use Scenario: Storing GPS coordinates, trip duration, and diagnostic trouble codes (DTCs) between ignition cycles in a vehicle telematics unit. IC Role / Device Role / Timing Role: Nonvolatile configuration and event log storage with guaranteed data retention >200 years and AEC-Q100 temperature compliance. Use Value: Eliminates need for external backup capacitors or supercapacitors due to 1 µA deep power-down current and fast 5 ms page writes. |
Use Scenario: Holding user-defined I/O mapping, calibration coefficients, and firmware update flags in programmable logic controllers operating in factory environments. IC Role / Device Role / Timing Role: SPI-accessible persistent memory supporting real-time updates without system reboot or flash reprogramming delays. Use Value: Sector-level write protection prevents corruption of critical calibration data during field firmware upgrades. |
| Medical Device Calibration Data | Smart Meter Firmware Parameters |
Use Scenario: Storing sensor offset/gain values and regulatory audit logs in portable ECG monitors requiring FDA-compliant data integrity. IC Role / Device Role / Timing Role: Tamper-resistant, high-endurance EEPROM for medical-grade calibration storage with electronic signature verification. Use Value: 1 million write cycles and >200-year retention meet IEC 62304 software lifecycle requirements for Class C devices. |
Use Scenario: Retaining tariff schedules, metering constants, and security keys in utility smart meters deployed in outdoor enclosures. IC Role / Device Role / Timing Role: SPI EEPROM with extended temperature range (-40°C to +125°C) and deep power-down for battery-assisted AMI communication modules. Use Value: Hardware write protection (WP pin + BP bits) blocks unauthorized parameter modification during over-the-air updates. |
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 DataFlash with 256-byte pages, integrated sector protection, but no HOLD pin or deep power-down mode | Lacks HOLD functionality and 1 µA deep power-down - unsuitable for interrupt-driven or ultra-low-power systems | Select only if page size flexibility and built-in sector protection outweigh need for HOLD and lowest standby current |
| BR25H512FJ-WE2 | 512 Kbit SPI EEPROM with 128-byte pages, 1.7–5.5 V supply, 1.5 µA deep power-down, and AEC-Q100 Grade 2 qualification | Wider VCC range and lower minimum voltage, but rated only to +105°C - not suitable for under-hood automotive use | Prefer for portable or consumer applications needing wider supply tolerance; avoid for 125°C ambient deployments |
Compared with AT25DF512C-SSH-T and BR25H512FJ-WE2, the 25LC512-E/MF uniquely combines HOLD pin support, 1 µA deep power-down at 2.5 V, and full AEC-Q100 Grade 1 qualification - making it the only option among the three qualified for high-reliability automotive and industrial edge nodes requiring both low-power suspend and extreme temperature resilience.
Availability
25LC512-E/MF is available at Aetrix Electronics and suitable for automotive telematics, industrial PLCs, medical diagnostics, and smart metering applications requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for 25LC512-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 company specializing in microcontrollers, analog devices, and memory solutions, with global manufacturing and quality certifications including ISO/TS 16949 and AEC-Q200.
The 25LC512-E/MF belongs to Microchip's legacy SPI EEPROM product line, designed specifically for reliable, low-power, pin-efficient nonvolatile storage in resource-constrained embedded systems across automotive, industrial, and medical markets.
FAQ
What is the maximum clock frequency supported by the 25LC512-E/MF?
The 25LC512-E/MF supports up to 20 MHz clock frequency when VCC is 4.5–5.5 V, and up to 10 MHz when VCC is 2.5–5.5 V. This dual-speed specification allows interoperability with both high-performance microcontrollers and low-voltage MCUs while maintaining timing compliance per AC characteristics table in DS20002065D.
Does the 25LC512-E/MF require external circuitry for write protection?
No - the 25LC512-E/MF includes built-in hardware write protection using the WP pin combined with the WPEN bit in its STATUS register. When WP is low and WPEN = 1, writes to nonvolatile STATUS bits are disabled. The WP pin function is blocked when WPEN = 0, allowing flexible system-level design without additional logic.
How does the HOLD pin function during an active SPI transaction on the 25LC512-E/MF?
The HOLD pin on the 25LC512-E/MF suspends ongoing SPI communication without resetting the internal address pointer or aborting the sequence. It must be asserted while SCK is low; SO immediately enters high-impedance state, and SI/SCK transitions are ignored. Resuming requires HOLD high while SCK is low - enabling deterministic interrupt handling in time-critical host firmware.
What erase options are available on the 25LC512-E/MF besides standard byte and page writes?
In addition to byte and page writes, the 25LC512-E/MF supports page erase (5 ms), sector erase (10 ms), and chip erase (10 ms), all self-timed and initiated via dedicated SPI instructions (PE, SE, CE). These erase operations are optional - byte/page writes do not require prior erasure - and are subject to block protection settings defined by BP0/BP1 bits.
Is the 25LC512-E/MF compatible with standard SPI Mode 0,0 and Mode 1,1 interfaces?
Yes - the 25LC512-E/MF is fully compatible with SPI Mode 0,0 (CPOL = 0, CPHA = 0) and Mode 1,1 (CPOL = 1, CPHA = 1). Data is sampled on the rising edge of SCK (SI) and output on the falling edge (SO), matching both modes' timing conventions. The device does not support Mode 0,1 or Mode 1,0 due to fixed sampling/holding behavior.
25LC512-E/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:
- 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)
25LC512-E/MF FAQ
1.How can I place an order for 25LC512-E/MF through Aetrix?
Please submit a Request for Quotation (RFQ) for 25LC512-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 25LC512-E/MF reliable?
The price and inventory of 25LC512-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 25LC512-E/MF is usually 5 days.
3.What payment methods are accepted for 25LC512-E/MF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 25LC512-E/MF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 25LC512-E/MF?
25LC512-E/MF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 25LC512-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 25LC512-E/MF?
For technical support, including 25LC512-E/MF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 25LC512-E/MF requirements.
6.How does Aetrix verify that 25LC512-E/MF is sourced from the original manufacturer or authorized distributors?
All 25LC512-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 25LC512-E/MF meets industry standards.
7.What is the process for return or replacement of 25LC512-E/MF?
All 25LC512-E/MF units undergo pre-shipment inspection (PSI). If there is an issue with 25LC512-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 25LC512-E/MF part is unused and in its original packaging.
Return procedure for 25LC512-E/MF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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