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STMicroelectronics M34E02-FMC6TG
- Part No.:
- M34E02-FMC6TG
- Manufacturer:
- STMicroelectronics
- Category:
- Memory
- Package:
- 8-UFDFN Exposed Pad
- Datasheet:
-
M34E02-FMC6TG.pdf
- Description:
- IC EEPROM 2KBIT I2C 8UFDFPN
- Quantity:
- Payment:
- Shipping:
Inventory:22,995
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Product details
Overview
M34E02-FMC6TG from STMicroelectronics is a 2-Kbit (256 × 8) I²C-compatible EEPROM designed specifically for Serial Presence Detect (SPD) in DDR1/DDR2/DDR3 DRAM modules. It operates from 1.7 V to 5.5 V, supports 400 kHz I²C bus speed, features permanent/reversible software write protection for the lower 128 bytes, and delivers >1 million erase/write cycles with >40 years data retention in TSSOP8 and UFDFPN8 packages.
For engineers reviewing the M34E02-FMC6TG datasheet, M34E02-FMC6TG pinout, M34E02-FMC6TG application in DDR DIMM SPD, or M34E02-FMC6TG equivalent for memory configuration storage, this page provides verified technical context, validated pin functions, real-world use cases in memory module design, and confirmed alternative options with documented functional differences.
Technical Context
The M34E02-FMC6TG implements a slave-only I²C interface with dual device type identifiers (1010b for memory access, 0110b for protection register control), enabling independent addressing of data and write-protection logic. Chip Enable inputs (E0–E2) configure the 3-bit address portion of the 7-bit I²C slave address, supporting up to eight devices on one bus.
It integrates two software write-protection mechanisms-SWP/CWP for reversible locking and PSWP for permanent protection of addresses 00h–7Fh-and hardware-level write disable via the WC pin tied high. All operations are synchronized to SCL, with ACK polling supported for write-cycle completion detection without fixed timing delays.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 2 Kbit (256 × 8 bits), organized as single-byte-addressable nonvolatile storage for SPD data. |
| I²C clock frequency | Up to 400 kHz - enables fast SPD read during system boot without violating DDR module timing constraints. |
| Supply voltage range | 1.7 V to 5.5 V - supports interoperability across DDR1 (2.5 V), DDR2 (1.8 V), and DDR3 (1.5 V) DIMM power domains. |
| Write endurance | >1,000,000 cycles - ensures reliable reprogramming during module manufacturing and field calibration. |
| Data retention | >40 years at +85 °C - guarantees SPD integrity over full product lifecycle in industrial and server environments. |
| Operating temperature | −40 °C to +85 °C - qualified for commercial and extended-temperature DIMM applications. |
| Protection granularity | Lower 128 bytes (00h–7Fh) software-lockable - isolates critical SPD parameters (module type, speed, timings) from accidental overwrite. |
Pinout & Package
Package: UFDFPN8 (MLP8), 2 mm × 3 mm, ultra-thin fine-pitch no-lead package - optimized for space-constrained DDR module PCB layouts and automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| E0, E1, E2 | Chip Enable address inputs | Set 3-bit I²C slave address LSBs; must be hard-wired to VCC/VSS (no pull resistors) for deterministic device selection on shared SPD bus. |
| SDA | Bi-directional I²C data line | Open-drain output requiring external pull-up; carries memory data, device select codes, and protection commands. |
| SCL | I²C clock input | Master-synchronized timing reference; sampled on rising edge for data input, drives internal state machine transitions. |
| WC | Hardware write control | Active-low enable for full-memory writes; when high, blocks all write instructions regardless of software protection state. |
| VCC | Power supply | 1.7–5.5 V input with internal POR circuitry; requires local 10–100 nF decoupling capacitor near pins. |
| VSS | Ground reference | Return path for all internal circuits; must be low-impedance connection to system ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| Dual I²C device identifiers | Separate 4-bit codes (1010b / 0110b) allow independent access to memory array and protection register using same SDA/SCL lines. |
| Reversible + permanent write protection | SWP/CWP instructions lock/unlock lower 128 bytes; PSWP permanently disables writes to that region after power cycle. |
| Noise-immune I²C interface | Schmitt-trigger inputs and integrated noise filters on SDA/SCL ensure robust operation in electrically noisy DIMM slots. |
| ECOPACK2® compliance | RoHS-compliant and halogen-free packaging meets JEDEC standards for DDR module environmental requirements. |
| Self-timed write cycle | Internal timing eliminates need for external delay; ACK polling allows host to detect completion without fixed tW wait. |
Applications
| DDR DIMM SPD Configuration | Server Memory Module Calibration |
|---|---|
|
Use Scenario: Storing JEDEC-defined SPD data (module capacity, CAS latency, tRCD, tRP) on DDR3 UDIMMs during manufacturing. IC Role / Device Role / Timing Role: Nonvolatile configuration storage accessed once per boot by memory controller's SMBus interface. Use Value: Enables plug-and-play compatibility across motherboard vendors without manual BIOS tuning or firmware updates. |
Use Scenario: Field-updating thermal derating tables and voltage margining parameters in enterprise RDIMMs. IC Role / Device Role / Timing Role: Secure, write-protected parameter repository accessible via baseboard management controller (BMC). Use Value: Supports dynamic SPD revisioning for reliability optimization under varying ambient conditions without module replacement. |
| Embedded DDR2 SODIMM Initialization | Industrial PLC Memory Module Validation |
|
Use Scenario: Boot-time SPD read in fanless embedded systems using DDR2 SODIMMs for FPGA configuration loading. IC Role / Device Role / Timing Role: Early-boot SPD data source for memory controller initialization sequence before OS load. Use Value: Guarantees deterministic memory timing setup within <50 ms of power-on, meeting real-time startup requirements. |
Use Scenario: Verifying SPD checksum and write-protection status during automated test of ruggedized DDR3 modules for factory automation controllers. IC Role / Device Role / Timing Role: Immutable configuration anchor used by test fixture to validate module authenticity and revision. Use Value: Prevents counterfeit or misprogrammed modules from entering production, reducing field failure rates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SPD EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24C02C-SSHM-T (Microchip) | 2-Kbit I²C EEPROM; lacks dedicated SWP/CWP/PSWP instructions and WC pin; only offers block write protection via WP pin. | Requires external hardware protection for SPD lower-page locking; not JEDEC SPD-optimized in firmware flow. | Choose when cost sensitivity outweighs SPD-specific feature requirements and board layout allows WP pin routing. |
| FM24V02-G (Cypress/Infineon) | F-RAM with 10¹⁴ endurance and no write delay; identical 2-Kbit density and I²C interface but no software write-protection registers. | Eliminates write-cycle polling but cannot replicate M34E02-F's reversible SPD parameter lockdown behavior. | Prefer for high-write-frequency calibration logging; avoid where JEDEC SPD write-lock compliance is mandatory. |
Compared with AT24C02C-SSHM-T and FM24V02-G, the M34E02-FMC6TG uniquely combines JEDEC SPD-aligned software protection (SWP/CWP/PSWP), hardware WC pin disable, and guaranteed 40-year retention - making it the only option qualified for production DDR module SPD where parameter immutability and standards compliance are non-negotiable.
Availability
M34E02-FMC6TG is available at Aetrix Electronics and suitable for DDR3 server memory modules, industrial SODIMM designs, and embedded DDR2 boot configuration systems requiring stable component supply, long-term obsolescence management, and JEDEC-compliant SPD functionality.
Supply support for M34E02-FMC6TG 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 automotive, industrial, and consumer markets.
The M34E02-F belongs to ST's serial EEPROM product line engineered specifically for JEDEC-standard SPD applications in DRAM modules, emphasizing write-protection integrity, multi-voltage compatibility, and high-reliability nonvolatile storage.
FAQ
What is the function of the WC pin on the M34E02-FMC6TG?
The WC (Write Control) pin is an active-low hardware enable for all write operations. When pulled high (≥0.7×VCC), it disables writes to both memory and protection registers regardless of software protection state. When low or floating, software-based protection (SWP/CWP/PSWP) governs write access to the lower 128 bytes. This dual-layer protection prevents accidental overwrites during system debug or hot-plug events.
How does the M34E02-FMC6TG support multiple DDR generations in one design?
Its 1.7–5.5 V supply range covers DDR1 (2.5 V), DDR2 (1.8 V), and DDR3 (1.5 V) nominal voltages, while its 400 kHz I²C interface meets JEDEC SPD timing budgets across all three standards. The device select code architecture (E0–E2) allows co-location of DDR1/DDR2/DDR3 SPD EEPROMs on the same SMBus segment, enabling mixed-generation module testing and validation.
Can the M34E02-FMC6TG be used outside DDR SPD applications?
Yes - it functions as a general-purpose 2-Kbit I²C EEPROM with enhanced protection features. However, its SWP/CWP/PSWP instruction set and WC pin behavior are optimized for SPD use cases. For non-SPD applications requiring simpler protection, standard EEPROMs like the M24C02 may offer lower cost and broader vendor support without sacrificing core functionality.
What package variants are available for the M34E02-FMC6TG?
The M34E02-FMC6TG is supplied exclusively in the UFDFPN8 (MLP8) package: 2 mm × 3 mm, 0.4 mm pitch, ultra-thin no-lead construction. This differs from the pin-compatible M34E02-FDW variant in TSSOP8 (4.4 mm × 3 mm). Both share identical electrical specs and firmware, but UFDFPN8 enables higher-density DDR module layouts and improved thermal performance in constrained spaces.
M34E02-FMC6TG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 8-UFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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:
- 1.7V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-UFDFPN (2x3)
M34E02-FMC6TG FAQ
1.How can I place an order for M34E02-FMC6TG through Aetrix?
Please submit a Request for Quotation (RFQ) for M34E02-FMC6TG 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 M34E02-FMC6TG reliable?
The price and inventory of M34E02-FMC6TG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M34E02-FMC6TG is usually 5 days.
3.What payment methods are accepted for M34E02-FMC6TG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M34E02-FMC6TG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for M34E02-FMC6TG?
M34E02-FMC6TG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your M34E02-FMC6TG 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 M34E02-FMC6TG?
For technical support, including M34E02-FMC6TG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M34E02-FMC6TG requirements.
6.How does Aetrix verify that M34E02-FMC6TG is sourced from the original manufacturer or authorized distributors?
All M34E02-FMC6TG 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 M34E02-FMC6TG meets industry standards.
7.What is the process for return or replacement of M34E02-FMC6TG?
All M34E02-FMC6TG units undergo pre-shipment inspection (PSI). If there is an issue with M34E02-FMC6TG, 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 M34E02-FMC6TG part is unused and in its original packaging.
Return procedure for M34E02-FMC6TG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
M34E02-FMC6TG Tags
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M24C02-WMN6TP
STMicroelectronics
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AT24C02C-XHM-T
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AT21CS01-STUM10-T
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M24C02-FMC6TG
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AT24CS02-SSHM-T
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93LC46BT-I/OT
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AT24C04C-SSHM-T
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