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Microchip Technology 25LC512T-E/SN
- Part No.:
- 25LC512T-E/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
25LC512T-E/SN.pdf
- Description:
- IC EEPROM 512KBIT SPI 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:7,952
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Product details
Overview
25LC512T-E/SN from Microchip Technology Inc. is a 512 Kbit (64 KB) SPI serial EEPROM with byte- and page-write capability, 128-byte page size, 20 MHz max clock speed, and industrial-extended temperature range (–40°C to +125°C). It features hardware write protection via WP pin, HOLD suspend functionality, and deep power-down mode consuming only 1 µA at 2.5V - deployed in automotive instrument clusters for firmware parameter storage.
For engineers reviewing the 25LC512T-E/SN datasheet, 25LC512T-E/SN pinout, 25LC512T-E/SN application, or 25LC512T-E/SN equivalent, key selection criteria include SPI timing compliance at 20 MHz, sector-level write protection granularity (16 KB/sector), endurance of 1 million cycles, deep power-down current spec, and AEC-Q100 qualification for automotive use.
Technical Context
The 25LC512T-E/SN implements a true SPI-compatible interface with separate SI (MOSI) and SO (MISO) lines, supporting Mode 0,0 and Mode 1,1 clock polarity/phase configurations. Its internal architecture includes a 128-byte page latch, status register with WIP/WEL/BP0/BP1 bits, and HV generator for EEPROM programming.
It supports four erase modes - byte/page write (no pre-erase), page erase (5 ms typical), sector erase (10 ms/sector), and chip erase (10 ms) - all self-timed and interruptible via HOLD. Write protection is enforced by both software (WRSR-configured BP bits) and hardware (WP pin + WPEN bit).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 512 Kbit (65,536 bytes), organized as 64 KB addressable space |
| Interface | SPI-compatible serial bus with dedicated SI, SO, SCK, CS, WP, HOLD - no I²C or UART emulation |
| Page Size | 128 bytes - defines maximum contiguous write length without wraparound or boundary violation |
| Max Clock Frequency | 20 MHz at VCC ≥ 4.5V; 10 MHz at VCC = 2.5V - constrains host MCU SPI peripheral configuration |
| Write Endurance | 1 million erase/write cycles per page - determines field lifetime under frequent calibration data logging |
| Data Retention | >200 years at 25°C - ensures long-term validity of stored configuration or calibration constants |
| Deep Power-Down Current | 1 µA at 2.5V, 125°C - enables ultra-low-power battery-backed systems during sleep |
Pinout & Package
25LC512T-E/SN uses an 8-lead SOIC package (SN suffix), with lead pitch 1.27 mm, body width 3.9 mm, and RoHS-compliant matte tin plating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select Input | Active-low enable: drives device into Standby when high; initiates command decode on falling edge |
| SO | Serial Data Output | MISO line: outputs read data or status bits on falling edge of SCK; tri-states when CS high or HOLD low |
| WP | Write-Protect Pin | Hardware lock: disables STATUS register writes when low + WPEN=1; no effect on memory reads or non-STATUS operations |
| VSS | Ground Reference | Primary return path for all I/O and core logic; must be low-impedance connection to system GND plane |
| SI | Serial Data Input | MOSI line: latches instruction/address/data on rising edge of SCK; ignored during HOLD assertion |
| SCK | Serial Clock Input | Asynchronous master clock: defines timing for SI sampling and SO update; requires monotonic edges ≤20 ns rise/fall |
| HOLD | Hold Input | Suspends ongoing SPI transaction: SO goes Hi-Z immediately; resumes from exact bit position on next SCK low-to-high after HOLD high |
| VCC | Supply Voltage | 2.5–5.5V operation: powers EEPROM array, logic, and charge pump; decoupling capacitor required within 10 mm |
Key Features
| Feature | Design Value |
|---|---|
| Page Erase / Sector Erase / Chip Erase | Enables targeted reprogramming without full-array bulk erase - reduces firmware update time by up to 90% vs. legacy EEPROMs |
| Deep Power-Down Mode | Reduces standby current to 1 µA at 2.5V, enabling >10-year battery life in always-on automotive sensors |
| Hardware Write Protection | Combines WP pin and WPEN bit to prevent accidental overwrites of critical calibration data during power transients |
| Electronic Signature Read (RDID) | Allows host MCU to verify part identity and revision at boot - eliminates counterfeit risk in Tier-1 supply chains |
| AEC-Q100 Qualified | Validated for automotive applications including engine control modules and ADAS domain controllers per Grade 1 (–40°C to +125°C) |
Applications
| Automotive Instrument Cluster | Industrial PLC Configuration Storage |
|---|---|
Use Scenario: Storing odometer values, trip counters, and driver preference settings across ignition cycles. IC Role / Device Role / Timing Role: Nonvolatile parameter retention IC with AEC-Q100 qualification and 200-year data retention. Use Value: Guarantees integrity of safety-critical mileage data even after 15+ years of vehicle service life. |
Use Scenario: Holding I/O mapping tables, PID tuning parameters, and firmware update flags in modular control cabinets. IC Role / Device Role / Timing Role: SPI-configurable EEPROM providing field-upgradable configuration without requiring flash reprogramming. Use Value: Enables zero-downtime parameter changes via HMI without controller reboot or firmware reload. |
| Medical Infusion Pump Calibration | Smart Energy Meter Firmware Patching |
Use Scenario: Archiving flow-rate calibration coefficients and dose history logs subject to FDA 21 CFR Part 11 audit trails. IC Role / Device Role / Timing Role: Tamper-resistant, high-endurance memory storing digitally signed calibration records. Use Value: Meets IEC 62304 Class C software requirements with 1M-cycle endurance for daily recalibration events. |
Use Scenario: Storing encrypted firmware patches and metering algorithm updates received over RF mesh networks. IC Role / Device Role / Timing Role: Secure, sector-protected SPI memory enabling authenticated over-the-air (OTA) updates. Use Value: Allows utilities to deploy regulatory-compliant firmware fixes without physical meter replacement. |
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; supports dual-I/O read; no HOLD pin; 3.3V-only supply | Lacks HOLD suspend and deep power-down; optimized for fast sequential read, not random write | Select only if system requires faster read throughput and can tolerate absence of HOLD and 1 µA sleep current |
| BR25L512FJ-WE2 | 512 Kbit SPI EEPROM; 128-byte page; 10 MHz max clock; 2.5–5.5V; -40°C to +105°C; no AEC-Q100 qualification | Lower max frequency and temperature grade; identical pinout but unqualified for automotive under hood | Acceptable for industrial controls where AEC-Q100 is not mandated and 20 MHz timing margin is unnecessary |
Compared with AT25DF512C-SSH-T and BR25L512FJ-WE2, the 25LC512T-E/SN uniquely delivers AEC-Q100 Grade 1 qualification, 20 MHz operation at full voltage range, and sub-µA deep power-down - making it the only choice for automotive infotainment and ADAS subsystems requiring guaranteed reliability across extended temperature and low-power constraints.
Availability
25LC512T-E/SN is available at Aetrix Electronics and suitable for automotive instrument clusters, industrial PLCs, medical infusion pumps, and smart energy meters requiring stable component supply across multi-year production lifecycles.
Supply support for 25LC512T-E/SN 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 25LC512T-E/SN belongs to Microchip's serial EEPROM product line designed specifically for automotive and industrial applications demanding high reliability, extended temperature operation, and robust write-protection mechanisms.
FAQ
What is the maximum clock frequency supported by the 25LC512T-E/SN?
The 25LC512T-E/SN supports up to 20 MHz clock frequency when VCC is between 4.5V and 5.5V. At lower supply voltages (2.5V ≤ VCC < 4.5V), the maximum clock rate drops to 10 MHz. This is defined in Table 1-2 AC Characteristics and must be respected to ensure reliable SPI communication and avoid setup/hold violations.
Does the 25LC512T-E/SN support hardware write protection?
Yes, the 25LC512T-E/SN supports hardware write protection via the WP pin in conjunction with the WPEN bit in the STATUS register. When WP is low and WPEN is set to 1, writes to nonvolatile STATUS register bits are disabled. All other operations-including memory reads and writes-remain fully functional unless blocked by software-configured BP0/BP1 bits.
What is the purpose of the HOLD pin on the 25LC512T-E/SN?
The HOLD pin on the 25LC512T-E/SN suspends an ongoing SPI transaction without resetting the sequence. When pulled low while SCK is low, SO immediately enters high-impedance state and all inputs except CS are ignored. Resuming requires bringing HOLD high while SCK is low - then communication continues from the exact bit position where it was paused.
How many write/erase cycles does the 25LC512T-E/SN guarantee?
The 25LC512T-E/SN guarantees 1 million erase/write cycles per page, as specified in Table 1-2 Note 2. This endurance rating applies under standard conditions (25°C, 5.5V) and is validated through characterization and qualification testing - not 100% production tested but statistically assured for design-in reliability.
Is the 25LC512T-E/SN qualified for automotive applications?
Yes, the 25LC512T-E/SN is AEC-Q100 qualified for Grade 1 operation (–40°C to +125°C ambient), making it suitable for under-hood and dashboard-mounted automotive systems. Its qualification includes stress testing for thermal cycling, humidity, and mechanical shock - confirmed in Microchip's official device documentation DS20002065D.
25LC512T-E/SN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- 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-SOIC
25LC512T-E/SN FAQ
1.How can I place an order for 25LC512T-E/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 25LC512T-E/SN 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/SN reliable?
The price and inventory of 25LC512T-E/SN 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/SN is usually 5 days.
3.What payment methods are accepted for 25LC512T-E/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 25LC512T-E/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 25LC512T-E/SN?
25LC512T-E/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 25LC512T-E/SN 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/SN?
For technical support, including 25LC512T-E/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 25LC512T-E/SN requirements.
6.How does Aetrix verify that 25LC512T-E/SN is sourced from the original manufacturer or authorized distributors?
All 25LC512T-E/SN 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/SN meets industry standards.
7.What is the process for return or replacement of 25LC512T-E/SN?
All 25LC512T-E/SN units undergo pre-shipment inspection (PSI). If there is an issue with 25LC512T-E/SN, 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/SN part is unused and in its original packaging.
Return procedure for 25LC512T-E/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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