My Inquiry
My Account
Microchip Technology 24LC025T-E/ST
- Part No.:
- 24LC025T-E/ST
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
24LC025T-E/ST.pdf
- Description:
- IC EEPROM 2KBIT I2C 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,532
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
24LC025T-E/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 and automotive temperature support (–40°C to +125°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-E/ST datasheet, 24LC025T-E/ST pinout, 24LC025T-E/ST application, or 24LC025T-E/ST equivalent, key selection criteria include its SOT-23-6 package, absence of hardware write-protect (WP), automotive-grade reliability, and compatibility with multi-device I²C bus topologies up to eight devices (four in SOT-23).
Technical Context
The 24LC025T-E/ST implements a standard two-wire I²C interface with master-controlled clock (SCL) and bidirectional open-drain data (SDA), supporting both byte and page write modes. Its internal address pointer auto-increments during sequential reads and wraps at 0xFF, enabling full 256-byte memory traversal in one operation.
Unlike 24LC024 variants, the 24LC025T-E/ST omits internal connection of the WP pin-eliminating hardware write protection-and uses only A0 and A1 for device addressing in SOT-23 packages (A2 unconnected). It employs Schmitt-trigger inputs and input filtering to suppress >50 ns noise spikes, ensuring robust operation on electrically noisy PCBs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2 Kbit (256 × 8-bit), sufficient for storing device IDs, calibration coefficients, or boot configuration flags |
| VCC Range | 2.5V to 5.5V-compatible with 3.3V and 5V logic systems without level shifting |
| Max Clock Frequency | 400 kHz at VCC ≥ 1.8V; enables faster writes than 100 kHz legacy I²C peripherals |
| Page Write Buffer | 16 bytes-reduces write transaction count by up to 16× vs. byte-write mode |
| Write Cycle Time | 5 ms maximum-defines minimum interval between successive write commands |
| Data Retention | 200 years at 25°C-ensures long-term validity of stored calibration or security keys |
| Endurance | 1 million erase/write cycles-supports frequent field updates in telemetry or logging applications |
Pinout & Package
24LC025T-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 space-constrained PCB layouts in automotive and portable electronics.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SCL) | Serial Clock Input | Master-generated clock synchronizing all I²C transfers; requires external pull-up resistor |
| 2 (VSS) | Ground Reference | System ground return path for internal logic and I/O circuits |
| 3 (SDA) | Serial Data I/O | Bidirectional open-drain bus line; must be pulled up externally (2 kΩ typical for 400 kHz) |
| 4 (A1) | Address Input | Second chip-select bit; sets device address along with A0 (A2 not connected in SOT-23) |
| 5 (A0) | Address Input | First chip-select bit; enables up to four 24LC025T-E/ST devices on same I²C bus |
| 6 (VCC) | Power Supply | +2.5V to +5.5V supply; internal voltage detector disables writes below ~1.5V |
Key Features
| Feature | Design Value |
|---|---|
| I²C Bus Compatibility | Fully compliant with Philips I²C specification-interoperable with standard microcontroller I²C peripherals without custom drivers |
| Schmitt Trigger Inputs | Input hysteresis ≥0.05×VCC eliminates false triggering from EMI or signal ringing on SCL/SDA lines |
| Page Write Capability | 16-byte buffer allows burst programming of configuration blocks, reducing host CPU overhead and bus occupancy |
| Automotive Temperature Range | –40°C to +125°C operation validated per AEC-Q100 stress tests-suitable for under-hood and infotainment modules |
| No WP Pin Connection | Hardware write-protection disabled by design-simplifies layout (no WP trace needed) and avoids accidental lockout in field-upgrade scenarios |
Applications
| Automotive Sensor Calibration Storage | Industrial PLC Configuration Backup |
|---|---|
Use Scenario: Storing factory-calibrated offset/gain values for temperature, pressure, and current sensors in engine control units. IC Role / Device Role / Timing Role: Nonvolatile configuration register providing persistent parameter storage across power cycles and reboots. Use Value: Eliminates need for recalibration after battery disconnect; supports AEC-Q100-compliant lifetime data integrity at 125°C ambient. | Use Scenario: Retaining user-defined I/O mapping, PID tuning constants, and alarm thresholds in programmable logic controllers. IC Role / Device Role / Timing Role: System-level configuration EEPROM interfaced via standard I²C peripheral on ARM Cortex-M host MCU. Use Value: Enables field updates without firmware reflashing; 1M endurance supports daily parameter changes over 10+ years. |
| Medical Device Serial Number Registry | Smart Meter Firmware Parameter Storage |
Use Scenario: Securely storing unique device identifiers, manufacturing date codes, and regulatory compliance flags in portable diagnostic equipment. IC Role / Device Role / Timing Role: Tamper-resistant identity vault accessed during boot sequence for authentication and traceability. Use Value: 200-year data retention ensures serial number persistence over full product lifecycle; no WP pin simplifies secure provisioning flow. | Use Scenario: Holding tariff schedules, metering constants, and communication protocol settings in ANSI C12.19-compliant utility meters. IC Role / Device Role / Timing Role: Field-upgradable parameter store synchronized with HAN (Home Area Network) commands via I²C. Use Value: Page-write capability reduces update time from seconds to sub-100ms; automotive-grade temp range accommodates outdoor meter enclosures. |
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 2 Kbit capacity and SOT-23-6 package, but rated for industrial temperature only (–40°C to +85°C) | Lacks automotive qualification; unsuitable for under-hood or high-ambient environments | Select when cost sensitivity outweighs extended temperature requirement and AEC-Q100 compliance is not mandated |
| AT24C02D-SSHM-T | 2 Kbit I²C EEPROM in SOIC-8; includes write-protect pin and 1 MHz clock option | Different package (SOIC-8) and pinout; requires PCB redesign; offers higher-speed option | Choose when board space permits larger package and hardware write protection is required for secure parameter locking |
Compared with 24LC025T-E/ST, the 24LC025-I/ST trades automotive qualification for lower cost, while AT24C02D-SSHM-T adds write protection and speed at the expense of footprint and layout compatibility-making 24LC025T-E/ST optimal for space-constrained, high-temp automotive I²C nodes requiring simplified design.
Availability
24LC025T-E/ST is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLCs, medical diagnostics, and smart metering applications requiring stable component supply, long-term lifecycle support, and AEC-Q100-aligned reliability.
Supply support for 24LC025T-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 operations.
The 24LC025T-E/ST belongs to Microchip's 24LCxx family of I²C serial EEPROMs, engineered for robust nonvolatile data storage in automotive, industrial, and consumer systems where reliability, low power, and small footprint are critical.
FAQ
What is the operating voltage range of the 24LC025T-E/ST?
The 24LC025T-E/ST operates from 2.5V to 5.5V, making it compatible with both 3.3V and 5V logic systems. This range excludes the 1.7V–2.5V low-voltage operation supported by the 24AA025 series-confirming that 24LC025T-E/ST requires minimum 2.5V for guaranteed functionality and timing compliance.
Does the 24LC025T-E/ST have a hardware write-protect pin?
No, the 24LC025T-E/ST does not feature a functional hardware write-protect (WP) pin. Per Microchip's DS21210N datasheet, the WP pin is not internally connected on any 24XX025 variant-including 24LC025T-E/ST-so external tie-off is unnecessary and write protection must be implemented in software or via bus arbitration.
How many devices can be connected on the same I²C bus using 24LC025T-E/ST?
Up to four 24LC025T-E/ST devices can share one I²C bus, due to its SOT-23-6 package limiting address pins to A0 and A1 (A2 is unconnected). Each device is selected via unique A0/A1 combinations, yielding four distinct 7-bit slave addresses (1010000, 1010001, 1010010, 1010011) per the I²C control byte format.
What is the maximum I²C clock frequency supported by 24LC025T-E/ST?
The 24LC025T-E/ST supports up to 400 kHz clock frequency when VCC is ≥1.8V, per AC specifications in DS21210N. At VCC < 1.8V, maximum clock drops to 100 kHz-but since 24LC025T-E/ST's minimum VCC is 2.5V, it operates exclusively at 400 kHz in all valid conditions.
Is the 24LC025T-E/ST qualified for automotive applications?
Yes, the "E" suffix in 24LC025T-E/ST denotes Automotive temperature grade (–40°C to +125°C), and the part is designed and tested to meet AEC-Q100 requirements. Its packaging, electrical characterization, and reliability testing align with automotive electronics standards, making it suitable for engine control, ADAS, and body electronics.
24LC025T-E/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:
- 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
24LC025T-E/ST FAQ
1.How can I place an order for 24LC025T-E/ST through Aetrix?
Please submit a Request for Quotation (RFQ) for 24LC025T-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 24LC025T-E/ST reliable?
The price and inventory of 24LC025T-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 24LC025T-E/ST is usually 5 days.
3.What payment methods are accepted for 24LC025T-E/ST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24LC025T-E/ST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24LC025T-E/ST?
24LC025T-E/ST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24LC025T-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 24LC025T-E/ST?
For technical support, including 24LC025T-E/ST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24LC025T-E/ST requirements.
6.How does Aetrix verify that 24LC025T-E/ST is sourced from the original manufacturer or authorized distributors?
All 24LC025T-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 24LC025T-E/ST meets industry standards.
7.What is the process for return or replacement of 24LC025T-E/ST?
All 24LC025T-E/ST units undergo pre-shipment inspection (PSI). If there is an issue with 24LC025T-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 24LC025T-E/ST part is unused and in its original packaging.
Return procedure for 24LC025T-E/ST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
24LC025T-E/ST 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…
