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Microchip Technology 24LC1025T-E/SM
- Part No.:
- 24LC1025T-E/SM
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
24LC1025T-E/SM.pdf
- Description:
- IC EEPROM 1MBIT I2C 400KHZ 8SOIJ
- Quantity:
- Payment:
- Shipping:
Inventory:15,204
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Product details
Overview
24LC1025T-E/SM from Microchip Technology Inc. is a 128K × 8 (1024 kbit) I²C-compatible serial EEPROM with 2.5–5.5 V supply range, 400 kHz max clock (100 kHz below 4.5 V in E-temp), and industrial/automotive temperature support (–40°C to +125°C). It features 128-byte page write buffer, hardware write-protect (WP pin), Schmitt-trigger inputs, and >1 million erase/write cycles - deployed in automotive body control modules for calibration storage and fault log retention.
For engineers reviewing the 24LC1025T-E/SM datasheet, 24LC1025T-E/SM pinout, 24LC1025T-E/SM application, or 24LC1025T-E/SM equivalent, key selection criteria include VCC compatibility (2.5–5.5 V), E-temp rating (–40°C to +125°C), 8-pin SOIC package (E/SM suffix), WP-enabled hardware protection, and cascading support for up to four devices on one I²C bus.
Technical Context
The 24LC1025T-E/SM implements a two-wire I²C interface with slave addressing via A0/A1 pins and fixed A2 tied to VCC, enabling up to four devices per bus. Its internal memory is split into two 512 kbit blocks (00000h–0FFFFh and 10000h–1FFFFh), accessed via the B0 bit in the control byte.
Write operations support byte and page modes (max 128 bytes/page); page writes wrap within physical page boundaries and trigger self-timed erase/write cycles (typ. 3 ms, max 5 ms). Read operations include current-address, random, and sequential modes - with automatic address pointer rollover at block boundaries.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 128K × 8 (1024 kbit) - supports firmware parameter tables and event logs in automotive ECUs. |
| VCC range | 2.5 V to 5.5 V - compatible with 3.3 V and 5 V microcontroller I/O domains without level shifting. |
| Max clock frequency | 400 kHz (2.5–5.5 V); 100 kHz below 4.5 V in E-temp - ensures reliable timing under automotive voltage transients. |
| Write endurance | 1,000,000 cycles - sufficient for daily recalibration updates over 10+ years of vehicle operation. |
| Data retention | >200 years at +85°C - guarantees long-term integrity of safety-critical configuration data. |
| Page write buffer | 128 bytes - enables efficient bulk storage of sensor calibration matrices or diagnostic snapshots. |
| Operating temperature | –40°C to +125°C (Automotive E-grade) - qualified for under-hood and transmission control unit environments. |
Pinout & Package
24LC1025T-E/SM is housed in an 8-lead SOIC package (3.90 mm width, E/SM suffix), RoHS-compliant and Pb-free. Pin functions are validated per Microchip DS20001941L.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | User-configurable chip select input | Hardwired to VSS or VCC to set 1 of 4 device addresses on shared I²C bus. |
| A1 | User-configurable chip select input | Combined with A0, selects one of four 24LC1025T-E/SM devices on same bus. |
| A2 | Non-configurable chip select input | Must be tied to VCC; floating or VSS connection disables device operation. |
| VSS | Ground reference | Common return path for all logic and memory circuitry; requires low-impedance PCB connection. |
| SDA | Bidirectional I²C data line | Open-drain output requiring external pull-up (2 kΩ typical for 400 kHz); supports multi-master arbitration. |
| SCL | I²C clock input | Master-generated synchronous clock; Schmitt-trigger input suppresses noise-induced glitches. |
| WP | Hardware write-protect control | Tied to VCC to lock entire 1024 kbit array; no software override - critical for ASIL-B functional safety. |
| VCC | Power supply input | Accepts 2.5–5.5 V; internal charge pump enables EEPROM programming across full voltage range. |
Key Features
| Feature | Design Value |
|---|---|
| Schmitt-trigger inputs (SDA/SCL) | 50 ns spike suppression + 0.05×VCC hysteresis - eliminates false start/stop detection in noisy automotive harnesses. |
| Output slope control | Controlled SDA fall time (≤300 ns) - prevents ground bounce during high-speed writes in dense PCB layouts. |
| 128-byte page write buffer | Reduces I²C transaction count by 128× vs. byte writes - cuts bus occupancy time and CPU overhead in real-time systems. |
| Hardware write-protect (WP) | Physical lockout of all write/erase cycles when WP = VCC - meets ISO 26262 requirement for immutable safety parameters. |
| Cascadable architecture | Four-device addressing (A0/A1) enables 4 Mbit total nonvolatile storage on single I²C bus - simplifies multi-sensor ECU designs. |
Applications
| Automotive Body Control Module | Industrial PLC Configuration Storage |
|---|---|
Use Scenario: Storing door lock actuation history, mirror position presets, and lighting calibration data across vehicle lifetime. IC Role / Device Role / Timing Role: Nonvolatile parameter register providing persistent state retention between ignition cycles. Use Value: Leverages 128-byte page writes to batch-update multiple calibration points in one I²C transaction, minimizing MCU intervention time. |
Use Scenario: Holding user-defined I/O mapping, PID tuning constants, and alarm thresholds in programmable logic controllers. IC Role / Device Role / Timing Role: Field-updatable configuration memory with hardware write-lock during runtime. Use Value: WP pin hardwired to VCC prevents accidental overwrites during live operation - critical for deterministic control loop behavior. |
| Medical Infusion Pump Calibration | Smart Energy Meter Firmware Parameters |
Use Scenario: Retaining flow rate calibration coefficients, dose history, and safety interlock settings across power cycles and battery swaps. IC Role / Device Role / Timing Role: Safety-critical data vault with >200-year data retention and ASIL-B-aligned write protection. Use Value: 1M-cycle endurance supports daily recalibration over 10+ years; E-temp rating ensures reliability in sterilized enclosures. |
Use Scenario: Storing tariff schedules, metering constants, and tamper-detection flags in utility-grade electricity meters. IC Role / Device Role / Timing Role: Secure, field-programmable memory accessible via isolated I²C interface. Use Value: Cascadable design allows expansion to 4 Mbit using three additional 24LC1025T-E/SM units - accommodates future firmware updates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 24AA1025-I/SN | Wider VCC range (1.7–5.5 V); lower max clock (400 kHz only above 2.5 V); industrial temp only (–40°C to +85°C). | Lacks automotive qualification; unsuitable for under-hood or transmission control use cases. | Select only for cost-sensitive industrial designs operating at ≥3.3 V with no E-temp requirement. |
| AT24C1024-MAHM-T | Same density and I²C interface; 1.7–5.5 V VCC; 1 MHz max clock; 1 M cycle endurance; SOIC-8 package. | No A2 pin constraint; different address mapping; lacks explicit automotive qualification per AEC-Q100. | Consider for high-speed (1 MHz) applications where AEC-Q100 compliance is not mandated. |
Compared with 24LC1025T-E/SM, the 24AA1025-I/SN offers broader voltage flexibility but excludes automotive temperature support, while the AT24C1024-MAHM-T enables faster clocking yet lacks formal AEC-Q100 validation - making 24LC1025T-E/SM the sole choice for ASIL-B-compliant automotive deployments requiring guaranteed –40°C to +125°C operation.
Availability
24LC1025T-E/SM 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 with full AEC-Q100 alignment and long-term lifecycle assurance.
Supply support for 24LC1025T-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 microcontrollers, analog components, and memory solutions, headquartered in Chandler, Arizona, with global manufacturing and support infrastructure.
The 24LC1025T-E/SM belongs to Microchip's automotive-qualified serial EEPROM product line, engineered specifically for mission-critical nonvolatile storage in harsh environments where data integrity, endurance, and temperature resilience are mandatory.
FAQ
What is the maximum I²C clock frequency supported by the 24LC1025T-E/SM?
The 24LC1025T-E/SM supports up to 400 kHz when VCC is 2.5–5.5 V and ambient temperature is within the automotive range (–40°C to +125°C). At VCC < 4.5 V under E-temp conditions, the maximum clock drops to 100 kHz per Microchip DS20001941L. This ensures robust timing margin during automotive battery voltage sags.
How does the WP pin function on the 24LC1025T-E/SM?
On the 24LC1025T-E/SM, the WP (Write-Protect) pin must be tied to either VSS (enables writes) or VCC (disables all write/erase operations). When WP = VCC, read operations remain fully functional, but no byte or page writes can occur - a hardware-level safeguard essential for ASIL-B safety mechanisms.
Can the 24LC1025T-E/SM be used with a 3.3 V microcontroller system?
Yes - the 24LC1025T-E/SM operates across 2.5–5.5 V, making it fully compatible with standard 3.3 V I/O domains. Its Schmitt-trigger SDA/SCL inputs and 2 kΩ recommended pull-up resistor ensure noise-immune communication at 400 kHz in mixed-voltage systems.
What is the page size and write time for the 24LC1025T-E/SM?
The 24LC1025T-E/SM has a 128-byte page write buffer. Page write time is typically 3 ms and up to 5 ms maximum per Microchip DS20001941L. This enables efficient bulk writes while maintaining predictable worst-case timing for real-time interrupt service routines.
Is the 24LC1025T-E/SM qualified for automotive applications?
Yes - the "E" in 24LC1025T-E/SM denotes Automotive grade, qualified for –40°C to +125°C operation and compliant with AEC-Q100 stress testing requirements. The "T" indicates tape-and-reel packaging, and "/SM" specifies the 8-lead SOIC package variant.
24LC1025T-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:
- 1Mbit
- Memory Organization:
- 128K x 8
- Memory Interface:
- I2C
- Clock Frequency:
- 400 kHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- 900 ns
- Voltage - Supply:
- 2.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIJ
24LC1025T-E/SM FAQ
1.How can I place an order for 24LC1025T-E/SM through Aetrix?
Please submit a Request for Quotation (RFQ) for 24LC1025T-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 24LC1025T-E/SM reliable?
The price and inventory of 24LC1025T-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 24LC1025T-E/SM is usually 5 days.
3.What payment methods are accepted for 24LC1025T-E/SM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24LC1025T-E/SM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24LC1025T-E/SM?
24LC1025T-E/SM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24LC1025T-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 24LC1025T-E/SM?
For technical support, including 24LC1025T-E/SM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24LC1025T-E/SM requirements.
6.How does Aetrix verify that 24LC1025T-E/SM is sourced from the original manufacturer or authorized distributors?
All 24LC1025T-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 24LC1025T-E/SM meets industry standards.
7.What is the process for return or replacement of 24LC1025T-E/SM?
All 24LC1025T-E/SM units undergo pre-shipment inspection (PSI). If there is an issue with 24LC1025T-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 24LC1025T-E/SM part is unused and in its original packaging.
Return procedure for 24LC1025T-E/SM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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