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STMicroelectronics M24C64S-FCU6T/TF
- Part No.:
- M24C64S-FCU6T/TF
- Manufacturer:
- STMicroelectronics
- Category:
- Memory
- Package:
- 4-XFBGA, WLCSP
- Datasheet:
-
M24C64S-FCU6T/TF.pdf
- Description:
- IC EEPROM 64KBIT I2C 1MHZ 4WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:4,637
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Product details
Overview
M24C64S-FCU6T/TF from STMicroelectronics is a 64-Kbit (8 Kbyte) I²C-compatible serial EEPROM in a 4-ball WLCSP package, supporting 400 kHz and 1 MHz bus speeds. It operates from 1.7 V to 5.5 V across –40°C to +85°C, features 32-byte page write capability, software-configurable block write protection (quarter/half/3/4/full array), and delivers >4 million write cycles with >200-year data retention. It serves as nonvolatile configuration storage in space-constrained IoT sensor nodes.
For engineers reviewing the M24C64S-FCU6T/TF datasheet, M24C64S-FCU6T/TF pinout, M24C64S-FCU6T/TF application, or M24C64S-FCU6T/TF equivalent, key selection criteria include ultra-thin WLCSP footprint compatibility, I²C timing compliance at 1 MHz, voltage-flexible operation down to 1.7 V, and granular software write-protect granularity for firmware parameter partitioning.
Technical Context
The M24C64S-FCU6T/TF implements a standard I²C slave interface with fixed 7-bit device address 0xA0–0xA7 (b7–b1 = 1010001), where the R/W bit determines operation direction. It uses internal high-voltage generation for EEPROM programming and includes a power-on reset (POR) circuit that prevents spurious writes during power ramp-up.
Memory organization is 8 K × 8 bits, mapped into 256 pages of 32 bytes each. Write protection is controlled via a dedicated 8-bit register at address 1xxx.xxxx.xxxx.xxxxb, where b3 enables protection, b2–b1 define protected block size, and b0 locks the configuration permanently once set.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 64 Kbit (8 Kbyte), organized as 8 K × 8 bits - supports full system configuration storage without external memory expansion. |
| I²C speed | Up to 1 MHz - enables fast parameter updates in real-time edge control loops without bus contention delays. |
| Page size | 32 bytes - matches typical MCU cache line sizes and minimizes write latency per page commit. |
| Supply voltage | 1.7 V to 5.5 V - interoperable with 1.8 V, 3.3 V, and 5 V logic domains without level shifters. |
| Write endurance | >4 million cycles - supports daily firmware parameter logging over 10+ years in industrial monitoring nodes. |
| Data retention | >200 years at +85°C - ensures calibration data integrity across product lifetime in automotive under-hood modules. |
| ESD rating | 4 kV HBM - meets IEC 61000-4-2 Level 2 for robustness in handheld medical device assembly lines. |
Pinout & Package
Package: Ultra-thin 4-ball WLCSP (0.851 mm × 0.851 mm, 0.4 mm pitch), RoHS and halogen-free (ECOPACK2®).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Ball A1 | VCC | Power supply input - requires local 10–100 nF decoupling capacitor due to low-impedance WLCSP parasitics. |
| Ball A2 | SDA | Open-drain bidirectional I²C data line - must be pulled up externally; supports wire-OR with other I²C slaves. |
| Ball B1 | SCL | Input-only I²C clock line - sampled on rising edge; timing must meet tSU:STA, tHD:STA, and tLOW/tHIGH specs at target frequency. |
| Ball B2 | VSS | Ground reference - forms low-inductance return path with VCC ball; critical for noise immunity in high-speed I²C operation. |
Key Features
| Feature | Design Value |
|---|---|
| Software write protection | Configurable block lock (quarter/half/3/4/full array) via dedicated register - enables secure separation of factory calibration, user settings, and runtime logs. |
| Fast write timing | ≤5 ms byte/page write - reduces host MCU blocking time and improves system responsiveness during configuration saves. |
| Extended voltage range | 1.7 V min operating voltage - supports direct interfacing with 1.8 V microcontrollers without regulator overhead. |
| High reliability | 4 kV HBM ESD rating and >200-year data retention - validated for use in medical wearables requiring long-term patient history storage. |
| Wafer-level packaging | 0.851 mm × 0.851 mm WLCSP footprint - enables placement beneath 2 mm × 2 mm MCUs in ultra-compact hearable devices. |
Applications
| Smart Sensor Node | Wearable Health Monitor |
|---|---|
Use Scenario: Storing calibrated sensor offsets, temperature compensation coefficients, and last-known state after power loss in MEMS environmental sensors. IC Role / Device Role / Timing Role: Nonvolatile configuration storage with I²C slave interface; accessed during boot and infrequently during field recalibration. Use Value: Eliminates need for external backup battery or supercapacitor by retaining critical calibration data across cold starts and brownouts. | Use Scenario: Holding user-specific biometric thresholds (e.g., heart rate zones), device pairing keys, and firmware update metadata in Bluetooth-enabled patches. IC Role / Device Role / Timing Role: Secure parameter vault with software-lockable regions; write-protected sections prevent accidental overwrite of cryptographic keys. Use Value: Enables HIPAA-compliant data persistence without increasing PCB area or BOM count in sub-10 mm² wearable form factors. |
| Industrial PLC I/O Module | Automotive Body Control Unit |
Use Scenario: Saving channel-specific scaling factors, fault history logs, and commissioning parameters in DIN-rail mounted remote I/O terminals. IC Role / Device Role / Timing Role: Robust configuration EEPROM interfaced to ARM Cortex-M7 host via 1 MHz I²C; withstands wide ambient temperature swings. Use Value: Guarantees deterministic reinitialization after power interruption in factory automation environments with frequent voltage sags. | Use Scenario: Storing seat position memory, mirror angle presets, and lighting profile preferences in door module ECUs. IC Role / Device Role / Timing Role: Automotive-grade EEPROM with –40°C to +85°C operation and >4M write cycles; accessed during ignition-on sequence. Use Value: Supports 15+ year vehicle service life with daily user customization while meeting AEC-Q100 stress test requirements. |
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 (Microchip) | Same 64 Kbit capacity, 1 MHz I²C, but 8-lead SOIC package (4.9 mm × 6.0 mm) and no WLCSP option. | Lacks ultra-compact footprint; unsuitable for space-constrained wearables or miniaturized sensors. | Select when board layout allows SOIC and cost sensitivity outweighs size constraints. |
| BR24G64FJ-3GE2 (ROHM) | 64 Kbit, 1 MHz I²C, 4-bump WLCSP (0.8 mm × 0.8 mm), but only rated for 0°C to +70°C and 1 million write cycles. | Lower temperature grade and endurance limit it to consumer-grade portable electronics, not industrial or automotive. | Select only for cost-driven commercial products with benign thermal environments and moderate write frequency. |
Compared with AT24C64D-SSHM-T and BR24G64FJ-3GE2, the M24C64S-FCU6T/TF uniquely combines automotive-grade temperature range, ultra-thin WLCSP packaging, and >4 million write cycles - making it the sole choice for miniaturized, high-reliability embedded systems requiring long-term field data integrity.
Availability
M24C64S-FCU6T/TF is available at Aetrix Electronics and suitable for smart sensor nodes, wearable health monitors, industrial PLC I/O modules, and automotive body control units requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for M24C64S-FCU6T/TF 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, power management ICs, sensors, and memory solutions for industrial, automotive, and consumer markets.
The M24C64S-FCU6T/TF belongs to ST's M24C serial EEPROM product line, engineered specifically for ultra-compact, low-voltage, high-reliability nonvolatile storage in space- and power-constrained embedded systems.
FAQ
What is the maximum I²C clock frequency supported by the M24C64S-FCU6T/TF?
The M24C64S-FCU6T/TF supports up to 1 MHz I²C operation under standard conditions (VCC ≥ 2.5 V). At 1.7 V supply, the maximum guaranteed speed is 400 kHz. AC timing parameters including tBUF, tHD:STA, and tLOW are fully specified in Tables 10 and 11 of the datasheet for both speed grades.
How does the software write protection mechanism work on this EEPROM?
Write protection is controlled via an 8-bit register at address 1xxx.xxxx.xxxx.xxxxb. Bit b3 enables protection; b2–b1 select block size (quarter/half/3/4/full array); b0 locks the register permanently when set to 1. Protection is enforced per page during write attempts - unprotected pages accept data, protected ones return NACK.
Can the M24C64S-FCU6T/TF operate reliably at 1.7 V supply voltage?
Yes - the device is fully specified for 1.7 V to 5.5 V operation across –40°C to +85°C. At 1.7 V, DC parameters (e.g., ICC, ISB) and 400 kHz AC timing remain compliant. However, 1 MHz operation requires VCC ≥ 2.5 V per datasheet Section 8.
What is the physical package dimension and soldering recommendation for the WLCSP?
The package is a 4-ball ultra-thin WLCSP measuring 0.851 mm × 0.851 mm with 0.4 mm pitch. ST recommends using the footprint in Figure 14 (document page 31), with 0.25 mm diameter solder pads and 0.15 mm stencil aperture. Reflow must follow JEDEC J-STD-020 moisture sensitivity level 1 profile.
M24C64S-FCU6T/TF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 4-XFBGA, WLCSP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- 1 MHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- 650 ns
- Voltage - Supply:
- 1.7V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 4-WLCSP (0.85x0.85)
M24C64S-FCU6T/TF FAQ
1.How can I place an order for M24C64S-FCU6T/TF through Aetrix?
Please submit a Request for Quotation (RFQ) for M24C64S-FCU6T/TF 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 M24C64S-FCU6T/TF reliable?
The price and inventory of M24C64S-FCU6T/TF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M24C64S-FCU6T/TF is usually 5 days.
3.What payment methods are accepted for M24C64S-FCU6T/TF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M24C64S-FCU6T/TF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for M24C64S-FCU6T/TF?
M24C64S-FCU6T/TF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your M24C64S-FCU6T/TF 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 M24C64S-FCU6T/TF?
For technical support, including M24C64S-FCU6T/TF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M24C64S-FCU6T/TF requirements.
6.How does Aetrix verify that M24C64S-FCU6T/TF is sourced from the original manufacturer or authorized distributors?
All M24C64S-FCU6T/TF 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 M24C64S-FCU6T/TF meets industry standards.
7.What is the process for return or replacement of M24C64S-FCU6T/TF?
All M24C64S-FCU6T/TF units undergo pre-shipment inspection (PSI). If there is an issue with M24C64S-FCU6T/TF, 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 M24C64S-FCU6T/TF part is unused and in its original packaging.
Return procedure for M24C64S-FCU6T/TF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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