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Microchip Technology 24LC64FT-I/SN
- Part No.:
- 24LC64FT-I/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
24LC64FT-I/SN.pdf
- Description:
- IC EEPROM 64KBIT I2C 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,936
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Product details
Overview
24LC64FT-I/SN from Microchip Technology is a 64 Kbit I²C-compatible serial EEPROM organized as 8K × 8-bit, operating from 2.5V to 5.5V with industrial temperature range (–40°C to +85°C), 400 kHz max clock frequency, and hardware write-protect for the upper 1/4 array (1800h–1FFFh). It supports page writes up to 32 bytes and delivers ≤1 μA standby current, suited for low-power embedded systems requiring nonvolatile parameter storage.
For engineers reviewing the 24LC64FT-I/SN datasheet, 24LC64FT-I/SN pinout, 24LC64FT-I/SN application, or 24LC64FT-I/SN equivalent, key selection criteria include VCC min (2.5 V), I²C clock compatibility (400 kHz), write-protect granularity (quarter-array), endurance (1M cycles), and SOIC-8 package footprint compliance.
Technical Context
The 24LC64FT-I/SN implements a standard two-wire I²C interface with Schmitt-trigger inputs on SDA and SCL for noise immunity, slope-controlled outputs to suppress ground bounce, and internal address pointer auto-increment for sequential reads. Its control logic decodes slave address '1010' plus A2/A1/A0 bits, enabling up to eight devices on one bus.
Write operations are self-timed: byte writes complete in ≤5 ms, and page writes (≤32 bytes) use an on-chip buffer with wraparound protection at physical page boundaries. The WP pin samples at the Stop bit to enable/disable write access to addresses 1800h–1FFFh, independent of read functionality.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 64 Kbit (8K × 8-bit), providing sufficient space for firmware configuration, calibration data, or device logs in resource-constrained systems. |
| VCC operating range | 2.5 V to 5.5 V - compatible with 3.3 V and 5 V logic domains without level shifting. |
| Max I²C clock | 400 kHz - enables high-throughput parameter updates while maintaining robustness on noisy PCBs. |
| Page write buffer | 32-byte - reduces I²C transaction count by >95% vs. byte writes for multi-byte updates (e.g., sensor calibration tables). |
| Write-protect scope | Upper 1/4 array (1800h–1FFFh) - isolates critical factory settings from field firmware updates. |
| Endurance & retention | 1,000,000 erase/write cycles and >200 years data retention - validated for long-life industrial deployments. |
| Standby current | 1 μA max (industrial temp) - minimizes battery drain in always-on IoT edge nodes. |
Pinout & Package
24LC64FT-I/SN is supplied in an 8-lead SOIC package (SOIC-8, 3.90 mm width), pin-compatible with industry-standard 24Cxx EEPROM footprints and suitable for automated SMT assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Chip address input | Hardwired to VSS or VCC to set LSB of 7-bit I²C slave address (1010xxx); enables up to 8 devices on same bus. |
| A1 | Chip address input | Second bit of slave address; must be stable before I²C communication begins. |
| A2 | Chip address input | MSB of slave address; unused in SOT-23 variant but present and functional in SOIC-8. |
| VSS | Ground reference | Primary return path for all internal circuitry; requires low-impedance connection to system GND plane. |
| SDA | Serial data I/O | Open-drain bidirectional line; requires external pull-up (2–10 kΩ) and adheres to I²C timing for Start/Stop/data validity. |
| SCL | Serial clock input | Master-generated clock; synchronizes all data transfers; Schmitt-trigger input rejects sub-50 ns noise spikes. |
| WP | Write-protect control | Logic-high disables writes to 1800h–1FFFh; sampled only at Stop condition - no runtime toggling effect. |
| VCC | Power supply | Accepts 2.5–5.5 V; bypass capacitor (0.1 μF) required near pin to suppress switching transients. |
Key Features
| Feature | Design Value |
|---|---|
| I²C bus compatibility | Fully compliant with Philips I²C specification, supporting standard-mode (100 kHz) and fast-mode (400 kHz) timing without external arbitration logic. |
| Quarter-array hardware write-protect | Dedicated WP pin disables writes to 2K-word protected region (1800h–1FFFh), eliminating need for software lock bits or EEPROM emulation overhead. |
| 32-byte page write buffer | Reduces I²C bus occupancy by batching up to 32 bytes per Stop-initiated write cycle, cutting firmware update time by factor of ~10 vs. byte writes. |
| Schmitt-trigger inputs & slope control | SDA/SCL inputs reject noise spikes ≥50 ns; controlled output rise/fall times prevent ground bounce in dense mixed-signal layouts. |
| Low-voltage operation | Functional down to 2.5 V allows direct interfacing with 3.3 V microcontrollers and battery-powered systems without regulators. |
Applications
| Industrial Sensor Node | Medical Diagnostic Device |
|---|---|
|
Use Scenario: Storing calibrated sensor offsets, gain coefficients, and usage history across power cycles in a wireless temperature/humidity node. IC Role / Device Role / Timing Role: Nonvolatile configuration store accessed via I²C during boot and periodic recalibration; WP pin protects factory calibration data. Use Value: Eliminates re-calibration after power loss; 1M-cycle endurance ensures >10 years of daily updates at 200 cycles/year. |
Use Scenario: Retaining patient-specific therapy parameters, error logs, and firmware version metadata in portable ECG monitors. IC Role / Device Role / Timing Role: Secure parameter vault with hardware write-protect isolating clinical settings from user-modifiable fields. Use Value: Meets IEC 62304 Class B requirements for data integrity; 200-year retention guarantees lifetime device traceability. |
| Smart Energy Meter | Automotive Body Control Module |
|
Use Scenario: Logging tariff schedules, tamper events, and metering registers in DIN-rail mounted electricity meters. IC Role / Device Role / Timing Role: High-reliability data logger interfaced to MCU over 400 kHz I²C; page writes minimize bus contention during peak load periods. Use Value: 1 μA standby current extends backup battery life to >5 years; SOIC-8 package supports conformal coating for harsh environments. |
Use Scenario: Storing seat position memory, mirror presets, and lighting profiles in 12 V automotive cabin modules. IC Role / Device Role / Timing Role: Robust configuration EEPROM tolerant of load-dump transients and cold-crank voltage dips (down to 2.5 V). Use Value: Industrial-grade temp range (–40°C to +85°C) ensures operation in glove-box or under-hood locations; Pb-free RoHS compliance meets automotive standards. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24C64D-SSHM-T | Same 64 Kbit capacity, 1.7–5.5 V VCC, but rated for 1 MHz I²C (vs. 400 kHz); lower standby current (0.5 μA typ). | Better suited for high-speed data logging where bus bandwidth exceeds 400 kHz; not qualified for automotive temp range. | Select when faster write throughput is critical and industrial temp suffices; verify SCL timing margins at 1 MHz. |
| BR24G64FJ-WE2 | 64 Kbit, 1.6–5.5 V, supports 1 MHz I²C, but uses different write-protect scheme (software-configurable blocks, not hardware WP pin). | Offers flexible protection granularity but lacks dedicated hardware WP pin for immutable factory regions. | Choose when dynamic protection partitioning is needed; avoid if hardware-enforced quarter-array lock is mandatory. |
Compared with AT24C64D-SSHM-T and BR24G64FJ-WE2, the 24LC64FT-I/SN provides deterministic quarter-array hardware write-protection and guaranteed 400 kHz timing at 2.5 V - critical for safety-critical or legacy-system compatibility where software-based protection or higher-voltage margins are unacceptable.
Availability
24LC64FT-I/SN is available at Aetrix Electronics and suitable for industrial sensor nodes, medical diagnostic devices, smart energy meters, and automotive body control modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for 24LC64FT-I/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 microcontroller, analog, FPGA, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 24LC64FT-I/SN belongs to Microchip's 24XX64F family of I²C EEPROMs, engineered for ultra-low-power, high-reliability nonvolatile storage in space-constrained embedded systems across industrial, medical, and automotive markets.
FAQ
What is the minimum VCC required for reliable operation of the 24LC64FT-I/SN?
The 24LC64FT-I/SN requires a minimum VCC of 2.5 V for full specification compliance, including 400 kHz I²C operation and guaranteed write functionality. Operation below 2.5 V is not supported - unlike the 24AA64F (1.7 V min) or 24FC64F (1.7 V min), the 24LC64FT-I/SN is specifically characterized for 2.5–5.5 V operation per DS22154B.
Does the 24LC64FT-I/SN support 1 MHz I²C clock speed?
No, the 24LC64FT-I/SN does not support 1 MHz I²C. Its maximum clock frequency is 400 kHz across its full VCC range (2.5–5.5 V). The 1 MHz capability is exclusive to the 24FC64F variant; attempting 1 MHz operation on the 24LC64FT-I/SN will violate AC timing specifications and cause communication failures.
How does the hardware write-protect feature work on the 24LC64FT-I/SN?
When the WP pin of the 24LC64FT-I/SN is tied to VCC, write operations to memory addresses 1800h–1FFFh (upper 2K words) are disabled; reads remain fully functional. The WP state is sampled only at the Stop condition of each write command - toggling WP mid-operation has no effect. This provides immutable protection for factory-programmed calibration data.
What package type is used for the 24LC64FT-I/SN?
The 24LC64FT-I/SN uses an 8-lead SOIC package (SOIC-8, 3.90 mm body width), marked per Microchip's standard SOIC marking convention: "24LC64FI" on first line, "SN" on second line, with date code (e.g., "0527") and traceability code. It is pin- and footprint-compatible with industry-standard 24C64 SOIC variants.
Can multiple 24LC64FT-I/SN devices share the same I²C bus?
Yes, up to eight 24LC64FT-I/SN devices can operate on a single I²C bus using hardwired A2/A1/A0 address pins. Each device responds only to its unique 7-bit slave address (1010xxx), where xxx is the binary value of A2–A0. All devices must share common VCC, GND, SDA, and SCL connections with appropriate pull-ups.
24LC64FT-I/SN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 64Kbit
- Memory Organization:
- 8K 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-SOIC
24LC64FT-I/SN FAQ
1.How can I place an order for 24LC64FT-I/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 24LC64FT-I/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 24LC64FT-I/SN reliable?
The price and inventory of 24LC64FT-I/SN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 24LC64FT-I/SN is usually 5 days.
3.What payment methods are accepted for 24LC64FT-I/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24LC64FT-I/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24LC64FT-I/SN?
24LC64FT-I/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24LC64FT-I/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 24LC64FT-I/SN?
For technical support, including 24LC64FT-I/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24LC64FT-I/SN requirements.
6.How does Aetrix verify that 24LC64FT-I/SN is sourced from the original manufacturer or authorized distributors?
All 24LC64FT-I/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 24LC64FT-I/SN meets industry standards.
7.What is the process for return or replacement of 24LC64FT-I/SN?
All 24LC64FT-I/SN units undergo pre-shipment inspection (PSI). If there is an issue with 24LC64FT-I/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 24LC64FT-I/SN part is unused and in its original packaging.
Return procedure for 24LC64FT-I/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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