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Microchip Technology 24LC025/SN
- Part No.:
- 24LC025/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
24LC025/SN.pdf
- Description:
- IC EEPROM 2KBIT I2C 400KHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,016
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Product details
Overview
24LC025/SN 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), 400 kHz max clock, and 16-byte page write buffer. It delivers low-power operation (1 mA typical read current, 1 μA standby) and supports up to eight devices on one bus via A0–A2 address pins.
For engineers reviewing the 24LC025/SN datasheet, 24LC025/SN pinout, 24LC025/SN application, or 24LC025/SN equivalent, key selection considerations include its SOT-23-6 package, absence of hardware write-protect (WP pin not connected), 5 ms max page write time, and compatibility with I²C systems requiring robust noise immunity via Schmitt-trigger inputs and slope-controlled outputs.
Technical Context
The 24LC025/SN 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 memory traversal in one operation.
It features Schmitt-trigger inputs on SCL/SDA for noise suppression, input filter spike suppression (50 ns), and VCC threshold detection disabling write logic below 1.5V. The device lacks internal WP connection-unlike 24LC024-and uses only A0/A1 for addressing in SOT-23 (A2 unconnected), limiting cascading to four devices per bus.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2 Kbit (256 × 8-bit), sufficient for small configuration storage or calibration data in space-constrained designs |
| Supply Voltage | 2.5V to 5.5V - compatible with 3.3V and 5V logic domains without level shifting |
| Max Clock Frequency | 400 kHz (100 kHz if VCC < 2.5V) - enables fast firmware updates while maintaining timing margin in noisy environments |
| Page Write Buffer | 16 bytes - reduces I²C transaction count for multi-byte writes, improving bus efficiency |
| Write Cycle Time | 5 ms maximum - defines minimum delay between write commands; critical for real-time logging applications |
| Data Retention | Over 200 years - ensures long-term reliability in unattended or maintenance-free systems |
| Endurance | 1 million erase/write cycles - supports frequent parameter updates in industrial control or metering applications |
Pinout & Package
24LC025/SN is supplied in a 6-lead SOT-23 package (3.0 mm × 1.7 mm × 1.3 mm), optimized for high-density PCB layouts. Pin 1 is marked by laser indentation; pin 3 is SDA, pin 1 is SCL, and A2 is not internally connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Address Input | LSB of 3-bit slave address; tied to VSS or VCC to select device on shared I²C bus (supports up to 4 devices in SOT-23) |
| A1 | Address Input | Mid-bit of slave address; enables unique addressing when multiple 24LC025/SN devices share same bus |
| VSS | Ground | Reference node for all digital and analog circuitry; must be low-impedance for stable I²C signaling |
| SDA | Serial Data I/O | Bidirectional open-drain line requiring external pull-up (2 kΩ typical for 400 kHz); carries addresses, commands, and data |
| SCL | Serial Clock Input | Master-generated clock synchronizing all I²C transfers; Schmitt-trigger input rejects noise-induced false edges |
| VCC | Power Supply | +2.5V to +5.5V supply; internal voltage detector disables writes below 1.5V to prevent corruption during brownout |
Key Features
| Feature | Design Value |
|---|---|
| Schmitt-trigger inputs | Eliminates false triggering from bus noise, enabling reliable operation in electrically harsh environments like automotive body control modules |
| Output slope control | Reduces ground bounce and EMI during signal transitions, critical for mixed-signal PCBs with sensitive analog sections |
| 16-byte page write buffer | Allows burst programming of up to 16 bytes per Stop condition, cutting I²C overhead by ~85% vs. byte-wise writes |
| 100/400 kHz clock compatibility | Supports legacy 100 kHz systems and high-speed 400 kHz designs without hardware changes |
| ESD protection >4 kV | Withstands handling and board-level ESD events per HBM, reducing need for external protection components |
Applications
| Industrial Sensor Calibration | Automotive Body Control Unit |
|---|---|
Use Scenario: Storing factory-trimmed sensor offset/gain coefficients and user-adjusted thresholds in temperature/humidity sensors. IC Role / Device Role / Timing Role: Nonvolatile configuration storage accessed at power-up via I²C; no timing-critical interaction during runtime. Use Value: Enables field-replaceable sensors with pre-programmed calibration, eliminating recalibration labor and ensuring traceable accuracy across production batches. |
Use Scenario: Saving seat position memory, mirror presets, and lighting profiles in vehicle door modules. IC Role / Device Role / Timing Role: Low-power EEPROM interfaced to microcontroller over I²C; retains data during ignition-off periods. Use Value: Supports ASIL-B–compatible data retention at –40°C to +125°C, meeting automotive qualification requirements without external backup capacitors. |
| Medical Diagnostic Device | Smart Energy Meter |
Use Scenario: Recording last-known operational state (e.g., battery charge level, error logs, test history) in portable glucose meters or pulse oximeters. IC Role / Device Role / Timing Role: Fail-safe data logger using acknowledge polling to confirm write completion before sleep mode entry. Use Value: Guarantees data integrity during unexpected power loss, satisfying IEC 62304 software safety classification for Class B medical devices. |
Use Scenario: Storing tariff schedules, billing cycle counters, and tamper-event timestamps in DIN-rail mounted electricity meters. IC Role / Device Role / Timing Role: High-endurance nonvolatile memory updated daily; accessed via isolated I²C interface. Use Value: Achieves >1M write cycles and 200-year data retention, exceeding ANSI C12.20 and IEC 62056 metering standards for 20+ year service life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 24AA025/SN | Same 2 Kbit capacity and SOT-23-6 package, but operates down to 1.7V; includes factory-programmable MAC address in first 128 bytes | Preferred for battery-powered IoT nodes requiring ultra-low-voltage operation (<2.5V) and embedded device identity | Select 24AA025/SN when system supply may dip below 2.5V or IEEE MAC address storage is needed |
| AT24C02-SSHM-T | 2 Kbit I²C EEPROM in SOIC-8; supports 1.7V–5.5V, includes write-protect pin, and offers 1 M cycle endurance | Suitable for through-hole or larger footprint designs where SOT-23 density is unnecessary and hardware write-protection is required | Choose AT24C02-SSHM-T when board layout allows SOIC-8 and WP functionality is mandatory for firmware update safety |
Compared with 24LC025/SN, 24AA025/SN extends voltage range downward but shares identical pinout and timing; AT24C02-SSHM-T trades SOT-23 compactness for SOIC-8 robustness and integrated write protection-making it better suited for industrial control panels than space-constrained wearables.
Availability
24LC025/SN is available at Aetrix Electronics and suitable for industrial sensor calibration, automotive body control units, medical diagnostic devices, and smart energy meters requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for 24LC025/SN 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 24LC025/SN belongs to Microchip's 24XX02X family of serial EEPROMs, designed specifically for cost-sensitive, space-constrained applications needing reliable nonvolatile storage with I²C simplicity and automotive-grade reliability.
FAQ
What is the operating voltage range for the 24LC025/SN?
The 24LC025/SN operates from 2.5V to 5.5V. This range ensures compatibility with common 3.3V and 5V logic systems. Operation below 2.5V is not supported-unlike the 24AA025/SN variant-and attempting to power the 24LC025/SN below 2.5V will disable write functionality due to its internal VCC threshold detector.
Does the 24LC025/SN have a hardware write-protect pin?
No, the 24LC025/SN does not include a functional hardware write-protect (WP) pin. The WP pin is physically present on 8-pin packages (PDIP, SOIC, etc.) but is not internally connected in the 24LC025/SN, including the SOT-23-6 variant. Software-based write protection must be implemented externally or via command-level locking if required.
How many devices can be connected on the same I²C bus using the 24LC025/SN?
Up to four 24LC025/SN devices can share one I²C bus when using the SOT-23-6 package, because only A0 and A1 are functional address inputs (A2 is unconnected). Each device requires a unique combination of A0/A1 tied to VSS or VCC, yielding four possible slave addresses (1010_00, 1010_01, 1010_10, 1010_11).
What is the maximum write cycle time for the 24LC025/SN?
The maximum write cycle time for the 24LC025/SN is 5 ms for both byte and page writes. This value is guaranteed across the full temperature and voltage range. During this period, the device does not acknowledge I²C commands-enabling reliable acknowledge polling to detect write completion before issuing subsequent operations.
Is the 24LC025/SN suitable for automotive applications?
Yes, the 24LC025/SN is qualified for automotive use with an extended temperature range of –40°C to +125°C (E-grade). It meets AEC-Q100 stress test requirements for EEPROMs and includes features critical for automotive environments: Schmitt-trigger inputs for noise immunity, slope-controlled outputs to limit ground bounce, and >4 kV HBM ESD protection.
24LC025/SN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm 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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
24LC025/SN FAQ
1.How can I place an order for 24LC025/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 24LC025/SN 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/SN reliable?
The price and inventory of 24LC025/SN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 24LC025/SN is usually 5 days.
3.What payment methods are accepted for 24LC025/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24LC025/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24LC025/SN?
24LC025/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24LC025/SN 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/SN?
For technical support, including 24LC025/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24LC025/SN requirements.
6.How does Aetrix verify that 24LC025/SN is sourced from the original manufacturer or authorized distributors?
All 24LC025/SN 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/SN meets industry standards.
7.What is the process for return or replacement of 24LC025/SN?
All 24LC025/SN units undergo pre-shipment inspection (PSI). If there is an issue with 24LC025/SN, 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/SN part is unused and in its original packaging.
Return procedure for 24LC025/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
24LC025/SN Tags
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M24C02-WMN6TP
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AT24C02C-XHM-T
Microchip Technology
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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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