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STMicroelectronics M24C64-FMH6TG
- Part No.:
- M24C64-FMH6TG
- Manufacturer:
- STMicroelectronics
- Category:
- Memory
- Package:
- 5-UFDFN
- Datasheet:
-
M24C64-FMH6TG.pdf
- Description:
- IC EEPROM 64KBIT I2C 5UFDFPN
- Quantity:
- Payment:
- Shipping:
Inventory:115,921
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Product details
Overview
M24C64-FMH6TG from STMicroelectronics is a 64-Kbit (8 Kbyte) I²C-compatible serial EEPROM organized as 8K × 8 bits, operating from 1.7 V to 5.5 V over –40 °C to +85 °C, supporting 1 MHz / 400 kHz / 100 kHz I²C bus modes, with 32-byte page write capability and hardware write protection via WC pin - deployed in industrial sensor calibration storage and embedded system configuration retention.
For engineers reviewing the M24C64-FMH6TG datasheet, M24C64-FMH6TG pinout, M24C64-FMH6TG application, or M24C64-FMH6TG equivalent, key selection considerations include supply voltage range compatibility (1.7–5.5 V), I²C speed mode support (1 MHz max), page size (32 bytes), write endurance (>4 million cycles), and WLCSP-5 package footprint constraints.
Technical Context
The M24C64-FMH6TG implements a standard I²C slave protocol with 7-bit device addressing (1010xxxR/W for memory array, 1011xxxR/W for identification page), where E2/E1/E0 pins are internally tied to 001 in its WLCSP-5 package - fixing the chip address to 0x51 for memory access and 0x59 for ID page operations. It features an internal HV generator and sequencer for EEPROM programming, with automatic address incrementing and ACK-based polling for write cycle completion detection.
Its architecture includes dedicated ECC logic (process-dependent) applied per 4-byte group, transparently correcting single-bit read errors while constraining write cycling budget at the group level. The WC pin provides hardware-level write lock for the full memory array, independent of I²C command execution - enabling fail-safe configuration storage in power-critical systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 64 Kbit (8 Kbyte), organized as 8K × 8 bits - supports firmware parameter storage without external address latching. |
| I²C Speed Modes | 1 MHz / 400 kHz / 100 kHz - enables high-speed configuration updates in real-time control loops. |
| Supply Voltage Range | 1.7 V to 5.5 V (–40 °C to +85 °C) - interoperable with 1.8 V logic and legacy 5 V microcontrollers. |
| Write Cycle Time | ≤5 ms for byte or page write - ensures deterministic timeout handling in time-constrained boot sequences. |
| Endurance & Retention | >4 million write cycles; >200 years data retention - suitable for field-updatable calibration tables in medical devices. |
| Page Size | 32 bytes - matches typical I²C burst length limits and minimizes bus occupancy during bulk writes. |
| ESD/Latch-Up | Enhanced protection per ECOPACK2 - meets IEC 61000-4-2 Level 4 (±8 kV contact) for industrial board-level robustness. |
Pinout & Package
Package: WLCSP-5 (5-bump ultra-thin chip-scale package, 0.4 mm pitch, 1.1 × 0.9 mm footprint), RoHS-compliant and halogen-free (ECOPACK2).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SDA | Serial Data I/O | Open-drain bidirectional line - requires external pull-up; shares bus with other I²C slaves; supports ACK/NACK handshake. |
| SCL | Serial Clock Input | Master-generated clock up to 1 MHz - defines timing for data sampling on rising edge; no internal clock generation. |
| WC | Write Control Input | Active-high hardware lock - disables all memory writes regardless of I²C command; floating = enabled, VCC = disabled. |
| VCC | Supply Voltage | 1.7–5.5 V DC input - must be stable before START condition; decoupling capacitor (10–100 nF) required near package pins. |
| VSS | Ground Reference | Return path for all signals and internal circuitry - must be low-impedance and co-located with VCC decoupling. |
Key Features
| Feature | Design Value |
|---|---|
| Multi-voltage operation | 1.7 V min enables direct interface with ultra-low-power MCUs (e.g., STM32L4/L5) without level shifters. |
| Hardware write protection | WC pin provides unconditional, non-volatile lock - prevents corruption during brown-out or firmware faults. |
| Page write efficiency | 32-byte page buffer reduces I²C transaction count by 32× vs. byte-write for contiguous data blocks. |
| Identification page (M24C64-D only) | Not applicable to M24C64-FMH6TG - this variant lacks the dedicated 32-byte lockable ID page. |
| ECC error correction | Available only in process-letter-K variants - transparently recovers single-bit read errors across 4-byte groups. |
Applications
| Industrial Sensor Calibration | Medical Device Configuration |
|---|---|
|
Use Scenario: Storing factory-calibrated temperature/pressure coefficients and linearization tables in smart transmitters. IC Role / Device Role / Timing Role: Nonvolatile configuration storage accessed during power-on initialization and field recalibration. Use Value: Enables traceable, tamper-resistant calibration data retention across >200-year product lifecycle without battery backup. |
Use Scenario: Holding patient-specific therapy parameters and safety thresholds in portable infusion pumps. IC Role / Device Role / Timing Role: Secure, write-protected parameter store accessed via I²C during device boot and mode transitions. Use Value: WC pin ensures critical settings remain immutable during unexpected resets or software anomalies. |
| Automotive Body Control Module | IoT Edge Node Firmware Metadata |
|
Use Scenario: Recording seat position memory, mirror presets, and lighting profiles in 12 V vehicle subsystems. IC Role / Device Role / Timing Role: Low-voltage EEPROM interfacing directly with 1.8 V CAN controller MCU GPIOs. Use Value: 1.7 V operation allows reliable read/write down to cold-cranking battery voltages (~1.8 V). |
Use Scenario: Caching OTA update signatures, version stamps, and secure boot counters in battery-powered sensors. IC Role / Device Role / Timing Role: High-endurance storage for infrequently updated but mission-critical metadata. Use Value: >4 million write cycles support daily firmware validation logs over 10+ years of field operation. |
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, 1.7–5.5 V, but supports only up to 400 kHz I²C; no WC pin - write protection via software address lock. | Lacks hardware-level write disable; unsuitable for safety-critical lockout where MCU may fault. | Select when cost sensitivity outweighs need for hardware write lock and 1 MHz speed. |
| BR24G64FJ-WE2 (ROHM) | 64 Kbit, 1.6–5.5 V, 1 MHz I²C, includes WC pin; uses different pinout (SOIC-8) and lacks ECC support. | Requires PCB redesign for SOIC-8; no ECC means higher risk of undetected bit flips in high-radiation environments. | Choose for drop-in SOIC replacement where WLCSP footprint is not required and ECC is noncritical. |
Compared with AT24C64D-SSHM-T and BR24G64FJ-WE2, the M24C64-FMH6TG uniquely combines WLCSP-5 miniaturization, 1 MHz I²C, hardware WC lock, and optional ECC - making it optimal for space-constrained, safety-aware, high-reliability embedded systems.
Availability
M24C64-FMH6TG is available at Aetrix Electronics and suitable for industrial sensor calibration, medical device configuration, and automotive body control modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for M24C64-FMH6TG 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 ICs, sensors, and memory solutions for industrial, automotive, and consumer markets.
The M24C64 series belongs to ST's serial EEPROM product line, engineered specifically for robust, low-voltage, high-endurance nonvolatile storage in space- and power-constrained embedded systems.
FAQ
Does M24C64-FMH6TG support 1 MHz I²C operation across its full temperature and voltage range?
Yes - the device guarantees 1 MHz I²C communication from 1.7 V to 5.5 V and –40 °C to +85 °C, as verified in DS6638 Rev 38 AC characteristics (Table 11). This includes setup/hold timing margins validated under worst-case voltage and temperature corners, enabling deterministic high-speed parameter loading in real-time systems.
What is the function of the WC pin, and can it be left unconnected?
The WC (Write Control) pin is an active-high hardware lock that disables all write operations to the entire memory array when driven to VCC. It must not be left floating - it should be pulled high for permanent lock or low (or grounded) for normal write enable. Leaving it unconnected risks undefined behavior due to noise coupling in high-EMI environments.
Is the identification page (ID page) available on M24C64-FMH6TG?
No - the identification page is exclusive to M24C64-D order codes. The M24C64-FMH6TG is an M24C64-F variant and does not include the additional 32-byte lockable ID page. Its memory map consists solely of the main 64 Kbit array (8K × 8 bits) with no dedicated ID region.
How does the WLCSP-5 package affect PCB layout and thermal performance?
The WLCSP-5 (1.1 × 0.9 mm, 0.4 mm pitch) requires microvia-enabled PCBs with solder mask defined pads and controlled reflow profiling. Its silicon die exposure enables superior thermal dissipation versus plastic packages - junction-to-board thermal resistance is ~120 °C/W - making it suitable for sealed enclosures with limited airflow.
M24C64-FMH6TG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 5-UFDFN
- 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:
- 1 MHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- 450 ns
- Voltage - Supply:
- 1.7V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 5-UFDFPN (1.7x1.4)
M24C64-FMH6TG FAQ
1.How can I place an order for M24C64-FMH6TG through Aetrix?
Please submit a Request for Quotation (RFQ) for M24C64-FMH6TG 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 M24C64-FMH6TG reliable?
The price and inventory of M24C64-FMH6TG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M24C64-FMH6TG is usually 5 days.
3.What payment methods are accepted for M24C64-FMH6TG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M24C64-FMH6TG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for M24C64-FMH6TG?
M24C64-FMH6TG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your M24C64-FMH6TG 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 M24C64-FMH6TG?
For technical support, including M24C64-FMH6TG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M24C64-FMH6TG requirements.
6.How does Aetrix verify that M24C64-FMH6TG is sourced from the original manufacturer or authorized distributors?
All M24C64-FMH6TG 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 M24C64-FMH6TG meets industry standards.
7.What is the process for return or replacement of M24C64-FMH6TG?
All M24C64-FMH6TG units undergo pre-shipment inspection (PSI). If there is an issue with M24C64-FMH6TG, 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 M24C64-FMH6TG part is unused and in its original packaging.
Return procedure for M24C64-FMH6TG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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