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Microchip Technology 24LC025-E/ST
- Part No.:
- 24LC025-E/ST
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
24LC025-E/ST.pdf
- Description:
- IC EEPROM 2KBIT I2C 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,836
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Product details
Overview
24LC025-E/ST from Microchip Technology Inc. is a 2 Kbit (256 × 8) I²C-compatible serial EEPROM designed for nonvolatile data storage in space-constrained industrial and automotive systems. It operates from 2.5V to 5.5V, supports 400 kHz clock rate, features 16-byte page write buffer, and delivers ≤5 ms write cycle time with >1 million endurance cycles and >200-year data retention.
For engineers reviewing the 24LC025-E/ST datasheet, 24LC025-E/ST pinout, 24LC025-E/ST application, or 24LC025-E/ST equivalent, key selection considerations include its SOT-23-6 package, absence of hardware write-protect (WP), automotive temperature range (–40°C to +125°C), and compatibility with multi-device I²C bus topologies up to eight devices (four in SOT-23).
Technical Context
The 24LC025-E/ST implements a standard two-wire I²C interface with open-drain SDA/SCL pins, Schmitt-trigger inputs for noise immunity, and internal slope control to suppress ground bounce. Its address decoding uses A0/A1 pins (A2 unconnected in SOT-23), enabling up to four devices on one bus.
It employs self-timed erase/write cycles with automatic page-buffer management and supports byte-write, page-write, and three read modes (current address, random, sequential). No WP pin is internally connected - write protection must be implemented externally or via software.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 2 Kbit (256 × 8-bit array), sufficient for calibration data, device IDs, or configuration registers in compact embedded nodes. |
| VCC range | 2.5V to 5.5V - compatible with 3.3V and 5V logic domains without level shifting. |
| Max I²C clock | 400 kHz - enables fast firmware updates or logging at ~400 kbps effective throughput (excluding ACK/overhead). |
| Page write buffer | 16 bytes - reduces I²C transaction count when writing contiguous data blocks, improving bus efficiency. |
| Write cycle time | ≤5 ms maximum - defines minimum interval between write commands; impacts real-time logging latency. |
| Endurance | ≥1,000,000 erase/write cycles - supports frequent parameter updates in industrial controllers or automotive ECUs. |
| Data retention | >200 years at +85°C - ensures long-term reliability in sealed or inaccessible deployments. |
| Operating temp | –40°C to +125°C (Automotive E-grade) - qualified for under-hood, powertrain, and ADAS subsystems. |
Pinout & Package
24LC025-E/ST is housed in a Pb-free, RoHS-compliant 6-lead SOT-23 package (3.0 mm × 1.7 mm × 1.3 mm), optimized for high-density PCB layouts. Pin 1 is laser-marked; no thermal pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SCL) | Serial Clock input | Master-generated clock synchronizing all I²C transfers; requires external pull-up resistor (2 kΩ typical for 400 kHz). |
| 2 (VSS) | Ground reference | System return path; must be low-impedance and decoupled near VCC pin to minimize noise coupling. |
| 3 (SDA) | Serial Data bidirectional I/O | Open-drain bus line shared across multiple slaves; requires same pull-up as SCL and supports multi-master arbitration. |
| 4 (A1) | Address input | Second chip-select bit; tied to VSS or VCC to configure slave address (0x50–0x53 range); determines bus position. |
| 5 (A0) | Address input | First chip-select bit; used with A1 to select among up to four 24LC025-E/ST devices on same I²C bus. |
| 6 (VCC) | Power supply | 2.5V–5.5V input; requires local 100 nF ceramic decoupling capacitor placed within 2 mm of pin. |
Key Features
| Feature | Design Value |
|---|---|
| Schmitt-trigger inputs | Eliminates false triggering from bus noise by providing ≥50 mV hysteresis on SCL/SDA, critical in electrically noisy automotive environments. |
| Output slope control | Slows SDA edge rates to reduce ground bounce and EMI, enabling reliable operation without external RC filtering. |
| 16-byte page write buffer | Allows burst writes of up to 16 bytes per STOP condition, cutting I²C overhead by ~60% vs. individual byte writes. |
| Internal VCC threshold detector | Disables write operations below ~1.5V, preventing partial writes and data corruption during brown-out conditions. |
| ESD protection | >4 kV HBM - meets IEC 61000-4-2 Level 2 requirements for robustness in manufacturing and field handling. |
Applications
| Industrial Sensor Node | Automotive Body Control Module |
|---|---|
|
Use Scenario: Storing calibrated sensor offsets and linearization coefficients in a wireless temperature/humidity node operating at 3.3V. IC Role / Device Role / Timing Role: Nonvolatile configuration store accessed at boot and updated only during factory calibration or field recalibration events. Use Value: Enables zero-touch deployment with pre-loaded calibration data; 2.5V min VCC supports direct connection to Li-ion battery-powered designs. |
Use Scenario: Retaining seat position memory, mirror settings, and user preferences in a vehicle door module. IC Role / Device Role / Timing Role: Persistent parameter storage interfaced to an MCU over I²C; survives ignition cycling and deep sleep modes. Use Value: Automotive-grade temperature range (–40°C to +125°C) and >1M endurance ensure reliability across 15+ year vehicle lifetimes. |
| Medical Infusion Pump | Smart Energy Meter |
|
Use Scenario: Logging dose history, error codes, and maintenance timestamps in Class II medical equipment requiring traceability. IC Role / Device Role / Timing Role: Secure audit trail storage with deterministic write timing (≤5 ms) to meet IEC 62304 data integrity requirements. Use Value: >200-year data retention eliminates need for periodic data refresh; RoHS/Pb-free compliance supports global regulatory submissions. |
Use Scenario: Storing tariff tables, metering constants, and firmware update metadata in ANSI C12.20-certified electricity meters. IC Role / Device Role / Timing Role: Configuration and calibration vault accessed during meter initialization and firmware upgrades. Use Value: Cascadable architecture allows expansion to 8K bits using four SOT-23 devices - ideal for space-limited meter PCBs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 24LC025-I/ST | Same die, Industrial grade (–40°C to +85°C); identical pinout, timing, and electrical specs except temp range. | Lacks automotive qualification; unsuitable for under-hood or safety-critical modules requiring E-grade validation. | Select 24LC025-I/ST only for cost-sensitive commercial or industrial applications outside automotive. |
| AT24C02-SSHM-T | 2 Kbit I²C EEPROM (Atmel/Microchip), SOIC-8; supports 1.7V–5.5V, 1 MHz clock, but larger footprint and different addressing scheme. | Requires PCB redesign (8-pin vs. 6-pin); lacks automotive temp rating; offers faster clock but no SOT-23 option. | Choose AT24C02-SSHM-T only if higher speed or legacy SOIC layout reuse is prioritized over size and automotive compliance. |
Compared with 24LC025-E/ST, the 24LC025-I/ST trades automotive qualification for lower cost in benign environments, while the AT24C02-SSHM-T sacrifices miniaturization and automotive rating for broader voltage range and faster I²C operation - making 24LC025-E/ST optimal for space-constrained, high-reliability automotive subsystems.
Availability
24LC025-E/ST is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor nodes, and medical device data logging requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for 24LC025-E/ST 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 design and manufacturing infrastructure.
The 24LC025-E/ST belongs to Microchip's 24XX025 family of I²C EEPROMs, engineered specifically for robust, low-power nonvolatile storage in automotive and industrial applications demanding extended temperature operation and high endurance.
FAQ
What is the function of the WP pin on the 24LC025-E/ST?
The WP (Write-Protect) pin is not internally connected on the 24LC025-E/ST. Unlike the 24LC024 variant, this device has no hardware write-protection capability. All memory locations are writable whenever the device is powered and addressed correctly. External software or system-level protection must be implemented if write locking is required.
Does the 24LC025-E/ST support 100 kHz I²C operation?
Yes, the 24LC025-E/ST supports 100 kHz I²C operation, but only when VCC is below 2.5V - a condition outside its specified operating range (2.5V–5.5V). Within its valid VCC range, it is rated for up to 400 kHz. Operation at 100 kHz is unnecessary and unsupported per datasheet specifications.
How many 24LC025-E/ST devices can be connected on a single I²C bus?
Up to four 24LC025-E/ST devices can share one I²C bus. This is because the SOT-23 package lacks the A2 pin, limiting address combinations to A1/A0 (two bits), yielding four unique slave addresses (0x50–0x53). Attempting to connect more will cause address collisions and communication failure.
What is the maximum page write size for the 24LC025-E/ST?
The 24LC025-E/ST supports a maximum page write size of 16 bytes. Writes exceeding this limit wrap around within the same physical page (addresses 0x00–0x0F, 0x10–0x1F, etc.), overwriting earlier data. Software must enforce page boundaries to prevent unintended data loss during multi-byte writes.
Is the 24LC025-E/ST pin-compatible with the 24AA025-E/ST?
No, the 24LC025-E/ST is not pin-compatible with the 24AA025-E/ST. While both use SOT-23-6 packages, the 24AA025-E/ST operates from 1.7V–5.5V and includes internal pull-ups on A0/A1, whereas the 24LC025-E/ST requires 2.5V–5.5V and expects externally defined address levels - necessitating schematic and layout changes.
24LC025-E/ST Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 2Kbit
- Memory Organization:
- 256 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-TSSOP
24LC025-E/ST FAQ
1.How can I place an order for 24LC025-E/ST through Aetrix?
Please submit a Request for Quotation (RFQ) for 24LC025-E/ST 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 24LC025-E/ST reliable?
The price and inventory of 24LC025-E/ST are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 24LC025-E/ST is usually 5 days.
3.What payment methods are accepted for 24LC025-E/ST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24LC025-E/ST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24LC025-E/ST?
24LC025-E/ST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24LC025-E/ST 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 24LC025-E/ST?
For technical support, including 24LC025-E/ST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24LC025-E/ST requirements.
6.How does Aetrix verify that 24LC025-E/ST is sourced from the original manufacturer or authorized distributors?
All 24LC025-E/ST 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 24LC025-E/ST meets industry standards.
7.What is the process for return or replacement of 24LC025-E/ST?
All 24LC025-E/ST units undergo pre-shipment inspection (PSI). If there is an issue with 24LC025-E/ST, 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 24LC025-E/ST part is unused and in its original packaging.
Return procedure for 24LC025-E/ST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
24LC025-E/ST 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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AT24C02C-SSHM-T
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24LC01BT-I/OT
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M24C02-FMC6TG
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AT24CS02-SSHM-T
Microchip Technology
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93LC46BT-I/OT
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AT24C04C-SSHM-T
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24LC01BT-I/SN
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24AA02UIDT-I/OT
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AT24C08C-STUM-T
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