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Microchip Technology 24LC64FT-E/MS
- Part No.:
- 24LC64FT-E/MS
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
24LC64FT-E/MS.pdf
- Description:
- IC EEPROM 64KBIT I2C 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,571
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Product details
Overview
24LC64FT-E/MS from Microchip Technology Inc. is a 64 Kbit I²C-compatible serial EEPROM organized as 8K × 8-bit memory, operating from 2.5V to 5.5V with 400 kHz max clock frequency and industrial–automotive temperature range (−40°C to +125°C). It features hardware write-protection for the upper 1/4 array (1800h–1FFFh), 32-byte page write buffer, and low-power operation (400 µA read, 1 µA standby).
For engineers reviewing the 24LC64FT-E/MS datasheet, 24LC64FT-E/MS pinout, 24LC64FT-E/MS application, or 24LC64FT-E/MS equivalent, this page delivers verified electrical specs, MSOP-8 package layout, I²C timing compliance, endurance (1M cycles), and automotive-grade reliability data directly traceable to DS22154B.
Technical Context
The 24LC64FT-E/MS implements a standard two-wire I²C slave interface with Schmitt-trigger inputs on SDA/SCL for noise immunity and slope control to suppress ground bounce. Its internal address counter supports current-address, random, and sequential reads, while the 32-byte page buffer enables efficient burst writes within physical page boundaries (0000h–07FFh, 0800h–0FFFh, etc.).
Write protection is controlled solely by the WP pin state at the Stop bit of each write command-tied to VCC to inhibit writes to addresses 1800h–1FFFh, with no effect on reads. Acknowledge polling is supported to detect write-cycle completion without fixed delays, enabling deterministic bus arbitration in time-critical systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 64 Kbit (8K × 8-bit) nonvolatile storage, sufficient for firmware patches, calibration data, or device configuration in space-constrained embedded nodes. |
| VCC range | 2.5V to 5.5V - compatible with 3.3V and 5V logic domains; excludes 1.7V operation (reserved for 24AA64F/24FC64F variants). |
| Max clock frequency | 400 kHz at VCC ≥ 2.5V - supports standard-mode I²C timing; not rated for 1 MHz (FC variant only). |
| Temperature grade | Automotive (E): −40°C to +125°C - qualified for under-hood, ADAS, and powertrain modules requiring extended thermal robustness. |
| Endurance & retention | 1,000,000 erase/write cycles and >200 years data retention - validated for long-life industrial logging and automotive event recorders. |
| Write-protect scope | Hardware lock for upper 1/4 array (1800h–1FFFh) - isolates critical boot code or security keys from accidental overwrites during field updates. |
| Package | 8-lead MSOP (3.0 × 3.0 × 0.95 mm) - surface-mount footprint with exposed pad option; pin-compatible with SOIC/TSSOP but smaller area. |
Pinout & Package
8-lead MSOP package with gull-wing leads, 0.65 mm pitch, and thermal pad (optional). Pin 1 marked via laser etch or mold index.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Chip address input | LSB of 3-bit slave address (1010 A2 A1 A0 R/W); hardwired to VSS/VCC to select one of eight devices on shared I²C bus. |
| A1 | Chip address input | Middle bit of slave address; determines unique I²C address when multiple 24LC64FT-E/MS devices share SDA/SCL lines. |
| A2 | Chip address input | MSB of slave address; enables up to 512 Kbit contiguous addressing across eight devices (A2/A1/A0 used as A15/A14/A13). |
| VSS | Ground reference | Primary return path for all internal circuitry; must be low-impedance connection to system GND plane. |
| SDA | Serial data I/O | Open-drain bidirectional line requiring external pull-up (2 kΩ for 400 kHz); carries address, data, and ACK/NACK signals per I²C protocol. |
| SCL | Serial clock input | Master-generated clock synchronizing all transfers; Schmitt-trigger input ensures noise immunity on rising/falling edges. |
| WP | Write-protect control | Active-high enable: tied to VCC locks 1800h–1FFFh; tied to VSS enables full-array writes; sampled only at Stop bit edge. |
| VCC | Power supply | 2.5V–5.5V input powering EEPROM core and interface; decoupling capacitor (100 nF) required within 5 mm of pin. |
Key Features
| Feature | Design Value |
|---|---|
| Quarter-array hardware write-protect | Prevents corruption of critical firmware or calibration data stored in 1800h–1FFFh without software overhead or fuse programming. |
| 32-byte page write buffer | Reduces I²C transaction count by up to 32× versus byte-write mode, lowering bus occupancy and host CPU load in high-throughput logging. |
| Automotive temperature qualification | Validated operation from −40°C to +125°C meets AEC-Q100 stress test requirements for engine control and safety-critical subsystems. |
| Schmitt-trigger inputs with slope control | Eliminates false Start/Stop detection from EMI or ground bounce, enabling reliable I²C communication in noisy automotive or industrial environments. |
| 1 µA standby current (max) | Enables multi-year battery life in always-on sensor nodes or telematics modules where EEPROM retains configuration between wake cycles. |
Applications
| Automotive Event Data Recorder | Industrial PLC Configuration Storage |
|---|---|
|
Use Scenario: Captures crash-triggered vehicle dynamics (acceleration, brake status, airbag deployment) for forensic analysis. IC Role / Device Role / Timing Role: Nonvolatile storage for time-stamped safety-critical logs; accessed via I²C during post-crash diagnostics. Use Value: Automotive-grade temperature tolerance and 1M-cycle endurance ensure reliable recording across 15+ years of vehicle service life. |
Use Scenario: Stores user-defined I/O mapping, PID tuning parameters, and alarm thresholds in programmable logic controllers. IC Role / Device Role / Timing Role: Configuration memory updated infrequently but requiring guaranteed retention during power loss or firmware upgrades. Use Value: Hardware write-protect prevents accidental overwrite of calibrated values during routine maintenance or remote reprogramming. |
| Medical Infusion Pump Calibration | Smart Meter Firmware Patch Storage |
|
Use Scenario: Holds factory-calibrated flow rate coefficients and safety limits for drug delivery accuracy verification. IC Role / Device Role / Timing Role: Tamper-resistant storage for regulatory-mandated calibration data; accessed at startup and during self-test sequences. Use Value: Quarter-array write-protect isolates calibration constants from application firmware updates, satisfying IEC 62304 traceability requirements. |
Use Scenario: Stores delta patches applied to meter firmware during OTA updates to minimize bandwidth and flash wear. IC Role / Device Role / Timing Role: High-reliability scratchpad memory for patch staging; written once per update cycle and verified before execution. Use Value: 5 ms typical page write time and 1 µA standby current reduce update latency and extend battery life in AMI deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 24LC64-I/MS | Same 64 Kbit capacity, MSOP-8 package, and 400 kHz speed, but rated only for industrial (−40°C to +85°C) temperature range. | Lacks automotive qualification; unsuitable for under-hood or safety-critical systems requiring AEC-Q100 compliance. | Select 24LC64FT-E/MS when ambient operating temperature exceeds +85°C or automotive certification is mandatory. |
| AT24C64D-MAHM-T | 64 Kbit I²C EEPROM in 8-lead MSOP; supports 1 MHz clock (VCC ≥ 2.5V), lower 0.3 µA standby current, but no hardware write-protect. | No quarter-array lock; requires software-based protection schemes or external logic for secure configuration storage. | Choose AT24C64D-MAHM-T for higher-speed I²C buses or ultra-low-power sleep modes where write-protect is managed in firmware. |
Compared with 24LC64-I/MS, the 24LC64FT-E/MS adds automotive qualification and identical pinout; compared with AT24C64D-MAHM-T, it trades 1 MHz speed and sub-µA standby for hardware-enforced write protection and AEC-Q100 alignment-making it optimal for safety-aware automotive and industrial control designs.
Availability
24LC64FT-E/MS is available at Aetrix Electronics and suitable for automotive telematics, industrial PLCs, medical infusion pumps, and smart metering systems requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant nonvolatile memory.
Supply support for 24LC64FT-E/MS 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 24LC64F family was designed specifically for automotive and industrial applications demanding extended temperature operation, high endurance, and hardware-level data integrity-exemplified by the 24LC64FT-E/MS variant's E-grade qualification and quarter-array write-protect.
FAQ
What is the maximum I²C clock frequency supported by the 24LC64FT-E/MS?
The 24LC64FT-E/MS supports a maximum clock frequency of 400 kHz when VCC is 2.5V or higher. This is specified in Table 1-2 of DS22154B and applies across its full automotive temperature range (−40°C to +125°C). It does not support the 1 MHz mode reserved for the 24FC64F variant.
Does the 24LC64FT-E/MS have hardware write-protection, and how is it implemented?
Yes, the 24LC64FT-E/MS includes hardware write-protection for the upper 1/4 memory array (addresses 1800h–1FFFh). This is controlled by the WP pin: when tied to VCC, writes to that region are inhibited while reads remain functional. The pin state is sampled only at the Stop bit edge of each write command.
What package type is used for the 24LC64FT-E/MS, and what are its key mechanical dimensions?
The 24LC64FT-E/MS uses an 8-lead MSOP package (3.0 mm × 3.0 mm × 0.95 mm body height, 0.65 mm lead pitch). Per DS22154B page 15, it conforms to Microchip's MSOP packaging specification and is pin-compatible with SOIC and TSSOP variants, enabling drop-in replacement in space-constrained layouts.
How many write/erase cycles is the 24LC64FT-E/MS rated for, and what is its data retention period?
The 24LC64FT-E/MS is rated for more than one million (1,000,000) erase/write cycles and guarantees data retention exceeding 200 years at +25°C. These values are confirmed in the Features section of DS22154B and apply across its qualified automotive temperature range.
Can multiple 24LC64FT-E/MS devices share the same I²C bus, and how is addressing handled?
Yes, up to eight 24LC64FT-E/MS devices can share one I²C bus using the A0, A1, and A2 address pins. Each device is assigned a unique 3-bit chip address (bits A2–A0), forming part of the 7-bit slave address (1010 A2 A1 A0). All three pins must be hardwired to VSS or VCC-no floating connections are permitted.
24LC64FT-E/MS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- 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 ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP
24LC64FT-E/MS FAQ
1.How can I place an order for 24LC64FT-E/MS through Aetrix?
Please submit a Request for Quotation (RFQ) for 24LC64FT-E/MS 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-E/MS reliable?
The price and inventory of 24LC64FT-E/MS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 24LC64FT-E/MS is usually 5 days.
3.What payment methods are accepted for 24LC64FT-E/MS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24LC64FT-E/MS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24LC64FT-E/MS?
24LC64FT-E/MS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24LC64FT-E/MS 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-E/MS?
For technical support, including 24LC64FT-E/MS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24LC64FT-E/MS requirements.
6.How does Aetrix verify that 24LC64FT-E/MS is sourced from the original manufacturer or authorized distributors?
All 24LC64FT-E/MS 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-E/MS meets industry standards.
7.What is the process for return or replacement of 24LC64FT-E/MS?
All 24LC64FT-E/MS units undergo pre-shipment inspection (PSI). If there is an issue with 24LC64FT-E/MS, 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-E/MS part is unused and in its original packaging.
Return procedure for 24LC64FT-E/MS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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