My Inquiry
My Account
Microchip Technology 25LC512T-E/SM
- Part No.:
- 25LC512T-E/SM
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
25LC512T-E/SM.pdf
- Description:
- IC EEPROM 512KBIT SPI 8SOIJ
- Quantity:
- Payment:
- Shipping:
Inventory:2,065
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
25LC512T-E/SM from Microchip Technology 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 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 engineers reviewing the 25LC512T-E/SM datasheet, 25LC512T-E/SM pinout, 25LC512T-E/SM application, or 25LC512T-E/SM equivalent, this device is selected for robust nonvolatile storage in automotive control modules, industrial sensor nodes, and embedded systems requiring AEC-Q100 qualification, sector-level write protection, and SPI bus compatibility with PIC® and other microcontrollers.
Technical Context
The 25LC512T-E/SM implements an SPI-compatible 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 a 128-byte page latch, HV generator for EEPROM programming, and status register with WIP, WEL, BP0/BP1, and WPEN bits.
It supports four erase modes-byte/page write (no pre-erase), page erase (5 ms), sector erase (10 ms), and chip erase (10 ms)-all self-timed and interruptible only by CS deassertion. Write protection is configurable per 16 KB sector (BP0/BP1), and deep power-down mode disables all commands except RDID.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 512 Kbit (65,536 bytes), organized as 64 KB addressable space |
| Interface | SPI-compatible 4-wire bus (CS, SCK, SI, SO) with HOLD and WP pins |
| Page Size | 128 bytes - defines maximum contiguous write length without wraparound |
| Max Clock Frequency | 20 MHz at VCC ≥ 4.5 V - enables high-throughput firmware updates |
| Write Cycle Time | 5 ms typical for byte/page write - determines minimum time between write commands |
| Endurance | 1 million erase/write cycles per page - specifies lifetime under frequent reconfiguration |
| Data Retention | >200 years at 25°C - ensures long-term reliability in unpowered storage |
| Deep Power-Down Current | 1 µA at 2.5 V, 85°C - enables ultra-low-power battery-backed logging |
Pinout & Package
25LC512T-E/SM is packaged in an 8-lead SOIJ (Small Outline J-bend) with gull-wing leads, RoHS-compliant, and rated for extended temperature (-40°C to +125°C). Pin 1 is CS; pin 8 is VCC; exposed pad is not present in SOIJ.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select Input | Active-low enable: selects device for SPI communication; deassertion places SO in high-Z state |
| SO | Serial Data Output | Tri-state output delivering read data on falling SCK edge; enters high-Z when CS high or HOLD low |
| WP | Write-Protect Pin | Hardware lock: disables STATUS register writes when WP low and WPEN=1; ignored if WPEN=0 |
| VSS | Ground | Reference return path for all digital and analog circuitry; must be low-impedance |
| SI | Serial Data Input | Latches instruction/address/data on rising SCK edge; sampled first after CS goes low |
| SCK | Serial Clock Input | Synchronizes all SPI transfers; timing critical for setup/hold compliance per AC specs |
| HOLD | Hold Input | Pauses ongoing SPI sequence: SO tri-states immediately; resumes from same bit position on HOLD high |
| VCC | Supply Voltage | 2.5–5.5 V operation range; powers internal charge pump and logic; deep power-down active at 2.5 V |
Key Features
| Feature | Design Value |
|---|---|
| Page Erase / Sector Erase / Chip Erase | Enables selective memory management without full array overwrite - reduces wear and improves update granularity |
| Configurable Sector Protection (BP0/BP1) | Allows locking 0%, 25%, 50%, or 100% of memory (16 KB sectors) - secures bootloader or calibration data |
| HOLD Pin Functionality | Permits host MCU to service higher-priority interrupts mid-transfer - avoids SPI reinitialization overhead |
| Deep Power-Down Mode | Reduces current to 1 µA while preserving memory contents - extends battery life in always-on sensor nodes |
| Electronic Signature (RDID) | Provides factory-programmed 8-bit ID readable even from deep power-down - enables automated BOM verification |
| AEC-Q100 Qualified | Validated for automotive applications including engine control, ADAS sensors, and infotainment - meets stress testing requirements |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Programmable Logic Controller (PLC) |
|---|---|
Use Scenario: Storing calibration tables, fault logs, and adaptive learning parameters subject to frequent field updates. IC Role / Device Role / Timing Role: Nonvolatile configuration storage interfacing directly with PIC® MCU via SPI, supporting page writes during runtime. Use Value: 128-byte page writes minimize update latency; AEC-Q100 qualification ensures reliability under thermal cycling and vibration. |
Use Scenario: Retaining I/O mapping, ladder logic state, and firmware revision metadata across power cycles in harsh factory environments. IC Role / Device Role / Timing Role: SPI EEPROM providing deterministic 5 ms write cycles and sector-level protection for critical configuration blocks. Use Value: Deep power-down mode (<1 µA) enables energy harvesting integration; 16 KB sector protection isolates user program from system firmware. |
| Medical Infusion Pump | Smart Energy Meter |
Use Scenario: Logging dose history, alarm events, and calibration drift data with tamper-resistant storage requirements. IC Role / Device Role / Timing Role: Secure nonvolatile memory with hardware write-protection (WP pin + WPEN) preventing unauthorized parameter modification. Use Value: >200-year data retention guarantees audit trail integrity over product lifetime; ESD rating >4 kV withstands clinical handling. |
Use Scenario: Recording tariff schedules, consumption profiles, and firmware checksums in utility-grade meters operating 20+ years. IC Role / Device Role / Timing Role: High-endurance EEPROM storing time-critical billing data with 1M-cycle endurance per page. Use Value: Page erase (5 ms) and sector erase (10 ms) allow efficient daily log rotation without full-chip rewrites. |
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 Flash (not EEPROM); requires explicit sector erase before write; no built-in WP pin | Higher density scalability but lacks byte-write efficiency and hardware write protection | Select only if migrating to flash-based firmware storage with erase-aware software stack |
| 25AA512-I/SN | Same 512 Kbit SPI EEPROM; Industrial temp (-40°C to +85°C); SOIC-8 package; identical pinout and instruction set | Lower temperature grade; suitable for non-automotive industrial use where extended temp not required | Drop-in replacement for cost-sensitive designs without AEC-Q100 or extended temperature needs |
Compared with AT25DF512C-SSH-T and 25AA512-I/SN, the 25LC512T-E/SM uniquely combines AEC-Q100 qualification, hardware WP pin, and true byte-write capability - making it optimal for automotive and mission-critical embedded systems requiring guaranteed write atomicity and security.
Availability
25LC512T-E/SM is available at Aetrix Electronics and suitable for automotive ECU development, industrial PLC firmware storage, and medical device data logging requiring stable component supply, long lifecycle support, and AEC-Q100 compliance.
Supply support for 25LC512T-E/SM 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, mixed-signal, analog, and Flash-IP solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 25LC512T-E/SM belongs to Microchip's serial EEPROM product line, designed specifically for reliable, low-power, SPI-based nonvolatile storage in automotive, industrial, and medical applications demanding high endurance and data integrity.
FAQ
What is the maximum clock frequency supported by the 25LC512T-E/SM?
The 25LC512T-E/SM supports a maximum clock frequency of 20 MHz when VCC is 4.5 V to 5.5 V, and 10 MHz when VCC is 2.5 V to less than 5.5 V. This dual-speed specification allows flexible system integration across varying supply conditions while maintaining timing compliance per AC characteristics table.
Does the 25LC512T-E/SM require external erase before writing data?
No, the 25LC512T-E/SM does not require external erase before byte or page write operations. Its EEPROM architecture enables direct overwriting of individual bytes or pages. Erase commands (PE, SE, CE) are optional and used only for bulk management - not mandatory for standard writes.
How does the HOLD pin function during an active SPI transaction on the 25LC512T-E/SM?
When the HOLD pin is pulled low during an active SPI transaction, the 25LC512T-E/SM immediately tri-states the SO line and ignores further SI and SCK transitions. The internal state is preserved, allowing resumption from the exact bit position upon HOLD returning high - enabling seamless interruption for higher-priority MCU tasks.
What is the purpose of the WPEN bit in the STATUS register of the 25LC512T-E/SM?
The WPEN bit (bit 7) in the 25LC512T-E/SM STATUS register enables or disables the hardware write-protect function of the WP pin. When WPEN = 1 and WP = low, writes to nonvolatile STATUS bits are blocked; when WPEN = 0, the WP pin has no effect, allowing full STATUS register programmability regardless of WP state.
Can the 25LC512T-E/SM be used in deep power-down mode while retaining stored data?
Yes, the 25LC512T-E/SM retains all stored data in deep power-down mode, drawing only 1 µA at 2.5 V and 85°C. In this state, all commands except RDID are ignored, making it ideal for ultra-low-power applications like battery-backed event logging where memory persistence is critical.
25LC512T-E/SM Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.209", 5.30mm 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-SOIJ
25LC512T-E/SM FAQ
1.How can I place an order for 25LC512T-E/SM through Aetrix?
Please submit a Request for Quotation (RFQ) for 25LC512T-E/SM 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/SM reliable?
The price and inventory of 25LC512T-E/SM 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/SM is usually 5 days.
3.What payment methods are accepted for 25LC512T-E/SM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 25LC512T-E/SM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 25LC512T-E/SM?
25LC512T-E/SM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 25LC512T-E/SM 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/SM?
For technical support, including 25LC512T-E/SM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 25LC512T-E/SM requirements.
6.How does Aetrix verify that 25LC512T-E/SM is sourced from the original manufacturer or authorized distributors?
All 25LC512T-E/SM 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/SM meets industry standards.
7.What is the process for return or replacement of 25LC512T-E/SM?
All 25LC512T-E/SM units undergo pre-shipment inspection (PSI). If there is an issue with 25LC512T-E/SM, 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/SM part is unused and in its original packaging.
Return procedure for 25LC512T-E/SM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
25LC512T-E/SM Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
-
AT24C02C-SSHM-T
Microchip Technology
-
24LC01BT-I/OT
Microchip Technology
-
M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
-
AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
-
24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
