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Microchip Technology 24LC025T-I/ST
- Part No.:
- 24LC025T-I/ST
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
24LC025T-I/ST.pdf
- Description:
- IC EEPROM 2KBIT I2C 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,047
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Product details
Overview
24LC025T-I/ST from Microchip Technology Inc. is a 2 Kbit I²C-compatible serial EEPROM organized as 256 × 8-bit memory, operating from 2.5V to 5.5V with industrial temperature range (–40°C to +85°C). It features 16-byte page write buffer, 400 kHz max clock speed, and Schmitt-trigger inputs for noise immunity - used in embedded system configuration storage, sensor calibration data retention, and firmware parameter backup.
For engineers reviewing the 24LC025T-I/ST datasheet, 24LC025T-I/ST pinout, 24LC025T-I/ST application, or 24LC025T-I/ST equivalent, key selection considerations include VCC voltage compatibility (2.5–5.5V), absence of hardware write-protect (WP pin not connected), SOT-23-6 package constraints, and 16-byte page boundary handling in firmware.
Technical Context
The 24LC025T-I/ST implements a standard I²C slave interface with fixed 7-bit address prefix '1010' and three programmable chip-select bits (A0–A1 only; A2 unconnected in SOT-23), enabling up to four devices on one bus. Its internal address pointer auto-increments during sequential reads and wraps at 0xFF.
Write operations are self-timed with maximum 5 ms cycle time; acknowledge polling is supported to detect completion. The device uses low-power CMOS with typical standby current of 1 μA and read current of 1 mA, and includes input filtering and slope control to suppress ground bounce and noise spikes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2 Kbit (256 × 8-bit) - provides compact nonvolatile storage for device identifiers, calibration coefficients, or small configuration tables. |
| VCC Range | 2.5V to 5.5V - compatible with 3.3V and 5V logic systems; excludes 1.7–2.49V operation supported by AA-series variants. |
| Max Clock Frequency | 400 kHz - enables faster writes than 100 kHz mode; requires ≤2 kΩ pull-up for full-speed compliance. |
| Page Write Buffer | 16 bytes - allows efficient burst writes within a single physical page (0x00–0x0F, 0x10–0x1F, etc.); crossing boundaries causes wraparound. |
| Endurance & Retention | 1 million erase/write cycles, >200 years data retention - suitable for field-updatable parameters with infrequent changes. |
| Temperature Range | Industrial: –40°C to +85°C - validated for use in industrial controllers, metering equipment, and automotive body electronics. |
| ESD Protection | >4,000 V HBM - enhances robustness in handling-sensitive manufacturing and field service environments. |
Pinout & Package
24LC025T-I/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 space-constrained PCB layouts. Pin 1 is laser-marked; A2 is not internally connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SCL) | Serial Clock Input | Asynchronous master-generated clock synchronizing all I²C transfers; Schmitt-triggered for noise rejection. |
| 2 (VSS) | Ground Reference | System return path for all internal circuitry; must be low-impedance to support stable I²C signaling. |
| 3 (SDA) | Serial Data I/O | Open-drain bidirectional bus line requiring external pull-up; transmits addresses, data, and ACK/NACK signals. |
| 4 (A1) | Chip Select Bit 1 | Defines second bit of 3-bit slave address; tied high/low to configure unique I²C address among up to four SOT-23 devices. |
| 5 (A0) | Chip Select Bit 0 | Defines least-significant bit of slave address; enables multi-device addressing without external logic. |
| 6 (VCC) | Power Supply | 2.5–5.5V supply input; internal voltage detector disables writes below ~1.5V to prevent corruption during brownout. |
Key Features
| Feature | Design Value |
|---|---|
| Hardware Write-Protect Omission | WP pin not connected - eliminates external protection circuitry but requires software-level access control for critical data. |
| Schmitt Trigger Inputs | Input hysteresis ≥0.05×VCC - rejects fast transients and ensures reliable Start/Stop detection on noisy industrial buses. |
| Output Slope Control | Controlled SDA/SCL edge rates - reduces EMI and prevents ground bounce that could corrupt adjacent digital signals. |
| I²C Bus Cascading | Supports up to four SOT-23 units per bus via A0/A1 address bits - scales storage capacity to 8 Kbit without additional address decoding logic. |
| Page Write Efficiency | 16-byte buffer enables single-command writes of configuration blocks - cuts firmware overhead vs. byte-by-byte programming. |
Applications
| Industrial Sensor Node | Smart Meter Calibration |
|---|---|
|
Use Scenario: Storing factory-calibrated offset/gain values and runtime compensation coefficients in battery-powered environmental sensors. IC Role / Device Role / Timing Role: Nonvolatile configuration register holding persistent sensor metadata accessed at power-up and during field recalibration. Use Value: Enables zero-touch deployment with preloaded calibration; 1 μA standby current extends 10-year battery life in LoRaWAN nodes. |
Use Scenario: Retaining tariff tables, pulse-count history, and tamper-event logs in residential electricity meters. IC Role / Device Role / Timing Role: Secure parameter store interfaced via isolated I²C to metrology MCU; immune to power-loss corruption. Use Value: Meets IEC 62056 requirements for data integrity; >200-year retention ensures lifetime meter accuracy without field replacement. |
| Automotive Body Controller | Medical Device Settings |
|
Use Scenario: Saving user preferences (mirror position, seat memory) and diagnostic fault codes in 12V vehicle subsystems. IC Role / Device Role / Timing Role: I²C slave storing volatile-to-nonvolatile state transitions triggered by ignition-on/off events. Use Value: Industrial temp rating (–40°C to +85°C) ensures reliability under hood thermal cycling; 4 kV ESD withstand protects against assembly discharge. |
Use Scenario: Holding FDA-mandated operational limits, calibration timestamps, and audit trail entries in portable infusion pumps. IC Role / Device Role / Timing Role: Fail-safe configuration vault accessed only during boot and maintenance mode; write-protection enforced in firmware. Use Value: 1M endurance supports 10+ years of daily recalibration cycles; RoHS/Pb-free compliance meets medical supply chain mandates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 24AA025T-I/ST | Same 2 Kbit capacity and SOT-23-6 package, but supports 1.7–5.5V operation and includes factory-programmable MAC address. | Preferred where ultra-low-voltage operation (<2.5V) or embedded IEEE EUI-48 identifier is required. | Select 24AA025T-I/ST if system operates down to 1.7V or needs guaranteed-unique device ID; otherwise 24LC025T-I/ST offers tighter VCC tolerance at lower cost. |
| AT24C02-SSHM-T | 2 Kbit I²C EEPROM in SOIC-8; supports 1.7–5.5V, 1 MHz clock, and 1 ms write cycle - faster but larger footprint. | Suitable when board space permits SOIC-8 and higher-speed writes improve system responsiveness. | Choose AT24C02-SSHM-T for designs needing faster writes or legacy SOIC layout compatibility; avoid if SOT-23 size or 2.5–5.5V-only range is mandatory. |
Compared with 24AA025T-I/ST and AT24C02-SSHM-T, the 24LC025T-I/ST delivers optimal trade-off between industrial-voltage compliance, miniature SOT-23 packaging, and proven field reliability - making it ideal for cost-sensitive, space-constrained embedded systems where 400 kHz I²C bandwidth suffices.
Availability
24LC025T-I/ST is available at Aetrix Electronics and suitable for industrial sensor nodes, smart meter calibration, and automotive body controllers requiring stable component supply across extended production lifecycles.
Supply support for 24LC025T-I/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 24LCxx family was designed specifically for reliable, low-power nonvolatile data storage in resource-constrained embedded systems - emphasizing I²C simplicity, industrial-grade robustness, and long-term data integrity.
FAQ
What is the function of the WP pin on the 24LC025T-I/ST?
The WP (Write-Protect) pin is not internally connected on the 24LC025T-I/ST. Unlike the 24LC024 variant, this device lacks hardware write protection. All memory locations are writable whenever VCC is within specification and the I²C bus is accessible - software-level locking must be implemented externally if selective protection is needed for the 24LC025T-I/ST.
Can the 24LC025T-I/ST operate at 1.8V?
No, the 24LC025T-I/ST is rated for 2.5V to 5.5V operation only. Attempting to power it below 2.5V may result in unreliable communication, incomplete writes, or failure to acknowledge I²C commands. For 1.7–5.5V operation, consider the pin-compatible 24AA025T-I/ST instead - the 24LC025T-I/ST's voltage range is strictly defined in its datasheet and verified across temperature.
How many 24LC025T-I/ST devices can share one I²C bus?
Up to four 24LC025T-I/ST devices can be cascaded on a single I²C bus using the A0 and A1 address pins. Since the SOT-23 package omits A2, only two address bits are available - yielding four unique slave addresses (0x50–0x53). Each device must have distinct A0/A1 combinations; floating these pins is not permitted per Microchip's design guidelines for the 24LC025T-I/ST.
What is the maximum page write size for the 24LC025T-I/ST?
The 24LC025T-I/ST supports a 16-byte page write buffer. Writes exceeding 16 bytes without an intervening Stop condition will wrap around within the same physical page (e.g., writing 18 bytes starting at 0x00 stores bytes 0–15 at 0x00–0x0F, then overwrites 0x00–0x01 with bytes 16–17). Firmware must enforce page boundaries to prevent unintended data loss in the 24LC025T-I/ST.
Does the 24LC025T-I/ST support 1 MHz I²C clock speed?
No, the 24LC025T-I/ST supports up to 400 kHz clock frequency under all valid VCC and temperature conditions. While some competing EEPROMs (e.g., AT24C02) support 1 MHz, the 24LC025T-I/ST's AC specifications - including THIGH, TLOW, and TSU:DAT - are characterized only to 400 kHz. Operating above this violates timing margins and risks communication failures in the 24LC025T-I/ST.
24LC025T-I/ST Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- 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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP
24LC025T-I/ST FAQ
1.How can I place an order for 24LC025T-I/ST through Aetrix?
Please submit a Request for Quotation (RFQ) for 24LC025T-I/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 24LC025T-I/ST reliable?
The price and inventory of 24LC025T-I/ST are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 24LC025T-I/ST is usually 5 days.
3.What payment methods are accepted for 24LC025T-I/ST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24LC025T-I/ST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24LC025T-I/ST?
24LC025T-I/ST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24LC025T-I/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 24LC025T-I/ST?
For technical support, including 24LC025T-I/ST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24LC025T-I/ST requirements.
6.How does Aetrix verify that 24LC025T-I/ST is sourced from the original manufacturer or authorized distributors?
All 24LC025T-I/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 24LC025T-I/ST meets industry standards.
7.What is the process for return or replacement of 24LC025T-I/ST?
All 24LC025T-I/ST units undergo pre-shipment inspection (PSI). If there is an issue with 24LC025T-I/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 24LC025T-I/ST part is unused and in its original packaging.
Return procedure for 24LC025T-I/ST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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