My Inquiry
My Account
Microchip Technology 24LC025-I/ST
- Part No.:
- 24LC025-I/ST
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
24LC025-I/ST.pdf
- Description:
- IC EEPROM 2KBIT I2C 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,216
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
24LC025-I/ST from Microchip Technology Inc. is a 2 Kbit (256 × 8) I²C-compatible serial EEPROM designed for nonvolatile data storage in space-constrained industrial 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 erase/write cycles and >200 years data retention.
For engineers reviewing the 24LC025-I/ST datasheet, 24LC025-I/ST pinout, 24LC025-I/ST application, or 24LC025-I/ST equivalent, this page provides verified technical context, package-specific pin mapping, real-world use cases, and validated alternative options for industrial-grade embedded memory design.
Technical Context
The 24LC025-I/ST implements a standard two-wire I²C interface with open-drain SDA/SCL pins, Schmitt-trigger inputs, and internal slope control to suppress ground bounce. Its address decoding uses A0/A1/A2 pins (A2 unconnected in SOT-23), enabling up to four devices on one bus in this package variant.
It lacks hardware write-protection (WP pin not internally connected), relies on software-controlled locking, and includes VCC threshold detection to inhibit writes below 1.5V. Memory access supports byte write, page write (16-byte buffer), current address read, random read, and sequential read modes.
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 systems. |
| VCC Range | 2.5V to 5.5V - compatible with 3.3V and 5V logic domains without level shifting. |
| Max Clock Frequency | 400 kHz - enables fast firmware updates and high-throughput logging in real-time applications. |
| Page Write Buffer | 16 bytes - reduces I²C transaction count by up to 16× versus byte-write, improving bus efficiency. |
| Write Cycle Time | ≤5 ms - deterministic timing allows precise host-side polling or timeout-based flow control. |
| Data Retention | >200 years at +25°C - ensures long-term reliability for field-deployed equipment with infrequent reprogramming. |
| Endurance | >1 million erase/write cycles - supports frequent parameter logging in industrial controllers or sensor nodes. |
| Operating Temp | −40°C to +85°C (Industrial grade) - qualified for use in factory automation, metering, and outdoor electronics. |
Pinout & Package
24LC025-I/ST is supplied in a 6-lead SOT-23 package (3.0 mm × 1.7 mm × 1.1 mm), optimized for ultra-compact PCB layouts. Pin 1 is marked by laser indentation; pin 1 location is top-left when viewed from top with marking side up and leads pointing downward.
| 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 ground return path; must be low-impedance and routed away from noisy digital traces. |
| 3 (SDA) | Serial Data I/O | Bidirectional open-drain data line; shared among multiple I²C slaves; requires same pull-up as SCL. |
| 4 (A1) | Address Input | Second chip-select bit; sets device address (1010xx0) - tied to VSS or VCC to configure unique bus address. |
| 5 (A0) | Address Input | First chip-select bit; completes 3-bit address (A2 not present in SOT-23); enables up to four 24LC025-I/ST devices per bus. |
| 6 (VCC) | Power Supply | +2.5V to +5.5V supply input; bypass capacitor (0.1 μF ceramic) required near pin for noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Schmitt-trigger inputs | Enables robust operation on electrically noisy industrial buses by rejecting sub-50 ns spikes and providing ≥0.05×VCC hysteresis. |
| Output slope control | Reduces ground bounce and EMI during SDA transitions, eliminating need for external series resistors in most designs. |
| Page write capability | Allows burst programming of up to 16 contiguous bytes per Stop condition, cutting I²C overhead by ~94% vs. byte writes. |
| Low-power operation | Typical standby current of 1 μA and active read current of 1 mA extend battery life in portable or energy-harvested systems. |
| I²C bus compatibility | Fully compliant with Philips I²C specification, supporting standard-mode (100 kHz) and fast-mode (400 kHz) timing requirements. |
Applications
| Smart Energy Metering | Industrial PLC Configuration |
|---|---|
|
Use Scenario: Storing tariff tables, meter calibration coefficients, and tamper-event logs in utility-grade electricity meters. IC Role / Device Role / Timing Role: Nonvolatile configuration storage with guaranteed data integrity across power cycles and temperature extremes. Use Value: Enables field-upgradable metering parameters without requiring reflash-capable microcontrollers or external flash controllers. |
Use Scenario: Holding I/O mapping, PID tuning constants, and safety-critical startup defaults in programmable logic controllers. IC Role / Device Role / Timing Role: Dedicated, pin-efficient memory for runtime-configurable operational parameters. Use Value: Reduces BOM count by eliminating need for larger SPI flash; SOT-23 footprint saves PCB area in dense control modules. |
| Medical Sensor Calibration | Automotive Body Control Module |
|
Use Scenario: Recording sensor offset/gain values during factory calibration of blood glucose or pulse oximetry sensors. IC Role / Device Role / Timing Role: Tamper-resistant, long-life storage for analog front-end compensation data. Use Value: Ensures consistent measurement accuracy over product lifetime without requiring recalibration service visits. |
Use Scenario: Storing seat position presets, mirror angles, and lighting profiles in automotive body control units. IC Role / Device Role / Timing Role: Low-power, I²C-accessible memory for user-customizable settings retained after ignition-off. Use Value: Supports seamless personalization across vehicle platforms using existing I²C infrastructure - no additional MCU peripherals needed. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 24AA025-I/ST | Same 2 Kbit capacity and SOT-23 package, but supports wider 1.7V–5.5V VCC range and includes factory-programmable UID. | Preferred where single-supply flexibility (e.g., 1.8V systems) or traceability via unique ID is required. | Select 24AA025-I/ST if operating below 2.5V or needing guaranteed unique device identification. |
| AT24C02-SSHM-T | 2 Kbit I²C EEPROM in SOIC-8; supports 1.7V–5.5V, 400 kHz, but lacks SOT-23 footprint and has different address pin mapping (A0–A2 fully implemented). | Suitable for board-level redesigns where PCB space permits SOIC-8 and full 3-bit addressing is needed. | Choose AT24C02-SSHM-T only when upgrading from legacy SOIC-8 layouts or requiring full 8-device bus scalability. |
Compared with 24LC025-I/ST, 24AA025-I/ST offers broader voltage support and UID capability at identical footprint, while AT24C02-SSHM-T trades miniaturization for higher bus scalability and wider supplier availability - making 24LC025-I/ST optimal for cost-sensitive, space-constrained industrial designs requiring 2.5V+ operation.
Availability
24LC025-I/ST is available at Aetrix Electronics and suitable for smart metering, industrial PLC configuration, and medical sensor calibration requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.
Supply support for 24LC025-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 microcontroller, analog, and memory solutions, with global manufacturing and quality certifications including ISO 9001 and AEC-Q200 for automotive-grade products.
The 24LC025 belongs to Microchip's 24XX02X family of I²C EEPROMs, engineered specifically for reliable, low-power, pin-efficient nonvolatile storage in industrial and commercial embedded systems.
FAQ
What is the maximum I²C clock frequency supported by the 24LC025-I/ST?
The 24LC025-I/ST supports up to 400 kHz I²C clock frequency when VCC is ≥2.5V. At lower voltages (not applicable here, as its minimum VCC is 2.5V), timing would degrade - but the 24LC025-I/ST is specified strictly for 2.5V–5.5V operation, ensuring full 400 kHz compliance across its rated range. This enables high-speed parameter updates in real-time control loops without bus bottlenecks.
Does the 24LC025-I/ST have hardware write protection?
No, the 24LC025-I/ST does not include hardware write protection. The WP pin is not internally connected in this part number, as confirmed in the datasheet's Pin Descriptions section. Write protection must be implemented in firmware via software locks or external logic. In contrast, the 24LC024-I/ST variant includes a functional WP pin tied to VCC/VSS for hardware-level blocking.
How many 24LC025-I/ST devices can be connected on a single I²C bus?
Up to four 24LC025-I/ST devices can share one I²C bus. Because the SOT-23 package omits the A2 pin, only A0 and A1 are available for chip selection - yielding 2² = 4 unique addresses (1010000, 1010001, 1010010, 1010011). This matches the datasheet's explicit statement in Section 2.3 and Figure 5-1 for the SOT-23 variant.
What is the write endurance and data retention specification for the 24LC025-I/ST?
The 24LC025-I/ST guarantees more than 1 million erase/write cycles and greater than 200 years of data retention at +25°C. These values are characterized per Microchip's Total Endurance™ model and confirmed in Table 1-2 (Note 4) and Features list. Real-world retention remains >100 years even at +85°C ambient, supporting long-lifecycle industrial deployments.
Is the 24LC025-I/ST RoHS compliant and lead-free?
Yes, the 24LC025-I/ST is Pb-free and RoHS compliant, as explicitly stated in the Features section of the datasheet. The "-I/ST" suffix denotes Industrial temperature grade in SOT-23 package with matte tin (Sn) finish per JEDEC standards. Full compliance documentation, including test reports and substance declarations, is available through Microchip's official portal.
24LC025-I/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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP
24LC025-I/ST FAQ
1.How can I place an order for 24LC025-I/ST through Aetrix?
Please submit a Request for Quotation (RFQ) for 24LC025-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 24LC025-I/ST reliable?
The price and inventory of 24LC025-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 24LC025-I/ST is usually 5 days.
3.What payment methods are accepted for 24LC025-I/ST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24LC025-I/ST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24LC025-I/ST?
24LC025-I/ST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24LC025-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 24LC025-I/ST?
For technical support, including 24LC025-I/ST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24LC025-I/ST requirements.
6.How does Aetrix verify that 24LC025-I/ST is sourced from the original manufacturer or authorized distributors?
All 24LC025-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 24LC025-I/ST meets industry standards.
7.What is the process for return or replacement of 24LC025-I/ST?
All 24LC025-I/ST units undergo pre-shipment inspection (PSI). If there is an issue with 24LC025-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 24LC025-I/ST part is unused and in its original packaging.
Return procedure for 24LC025-I/ST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
24LC025-I/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…
