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STMicroelectronics M34E02-FDW6TP
- Part No.:
- M34E02-FDW6TP
- Manufacturer:
- STMicroelectronics
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
M34E02-FDW6TP.pdf
- Description:
- IC EEPROM 2KBIT I2C 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,923
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Product details
Overview
M34E02-FDW6TP from STMicroelectronics is a 2-Kbit I²C-compatible serial presence detect (SPD) EEPROM organized as 256 × 8 bits, designed for DDR1/DDR2/DDR3 DRAM module configuration storage. 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.
For engineers reviewing the M34E02-FDW6TP datasheet, M34E02-FDW6TP pinout, M34E02-FDW6TP application, or M34E02-FDW6TP equivalent, key selection criteria include SPD-compliant memory organization, dual write-protection mechanisms (SWP/CWP/PSWP), TSSOP8/UFDFPN8 package compatibility, I²C slave timing compliance, and DDR DIMM board-level integration requirements.
Technical Context
The M34E02-FDW6TP implements an I²C slave interface with fixed 4-bit device type identifiers (1010b for memory access, 0110b for protection register access) and 3-bit chip enable inputs (E0–E2) enabling up to eight devices on one bus. It uses Schmitt-triggered SCL/SDA inputs with integrated noise filtering and enhanced ESD/latch-up protection.
Write protection is implemented via three distinct instruction sets: Set Write Protection (SWP), Clear Write Protection (CWP), and Permanently Set Write Protection (PSWP), all requiring specific voltage-level sequences on E0 (VHV detection). The WC pin provides hardware-level full-memory write disable when tied high.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 2 Kbit (256 × 8 bits), fully SPD-compliant for DDR1/DDR2/DDR3 DIMMs |
| I²C clock frequency | Up to 400 kHz - ensures compatibility with standard SPD read timing in DDR memory controllers |
| Supply voltage range | 1.7 V to 5.5 V - supports wide-bus voltage domains including 1.8 V, 2.5 V, 3.3 V, and 5 V systems |
| Write endurance | ≥1,000,000 cycles - sufficient for factory programming and rare field updates in DIMM manufacturing |
| Data retention | ≥40 years at +85 °C - guarantees SPD data integrity over full product lifecycle of server/workstation memory modules |
| Operating temperature | −40 °C to +85 °C - meets industrial-grade requirements for memory module operation |
| Protection granularity | Lower 128 bytes (00h–7Fh) software-lockable - preserves critical SPD JEDEC parameters against accidental overwrite |
Pinout & Package
Package: TSSOP8 (DW), 4.4 × 3 mm, ECOPACK2® RoHS-compliant and halogen-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| E0, E1, E2 | Chip Enable address inputs | Directly wired to VCC/VSS to set unique 3-bit device select code (b2–b0); E0 detects VHV for SWP/CWP/PSWP execution |
| SDA | I²C bidirectional data line | Open-drain output requiring external pull-up; carries memory data, device select codes, and protection instructions |
| SCL | I²C clock input | Strobes all data transfers; includes Schmitt trigger and noise filter for robust timing in noisy DIMM environments |
| WC | Hardware write control | Drives entire memory area write-disabled when high; enables software-controlled protection when low or floating |
| VCC | Power supply | 1.7–5.5 V input with internal POR; requires local 10–100 nF decoupling capacitor near pins |
| VSS | Ground reference | Return path for all internal circuitry; must be low-impedance connection in DIMM PCB layout |
Key Features
| Feature | Design Value |
|---|---|
| Backward compatibility with M34C02 | Pin- and protocol-compatible replacement enabling drop-in upgrade in existing DDR1 DIMM designs |
| Dual software write protection | Supports both reversible (SWP/CWP) and irreversible (PSWP) locking of first 128 bytes for JEDEC SPD parameter safety |
| Noise-immune I²C interface | Schmitt-triggered SCL/SDA inputs plus digital noise filtering prevent spurious ACK/NACK during DIMM hot-plug events |
| ECOPACK2® packaging | TSSOP8 and UFDFPN8 options meet RoHS and halogen-free requirements for global memory module compliance |
| Self-timed write cycle | Internal timing eliminates need for external wait-state logic; ACK polling supported for precise host synchronization |
Applications
| DDR1 DIMM Configuration Storage | DDR2 DIMM SPD Module |
|---|---|
Use Scenario: Factory programming of JEDEC-standard SPD data (module size, speed, timings, manufacturer ID) onto DDR1 memory modules prior to system integration. IC Role / Device Role / Timing Role: Dedicated SPD EEPROM slave storing static configuration data accessed once per boot by memory controller's SMBus interface. Use Value: Ensures guaranteed read reliability at 100 kHz I²C speed under DDR1's 2.5 V VDDQ supply, with permanent lock of critical SPD fields post-programming. | Use Scenario: Embedded SPD storage on DDR2 unbuffered DIMMs used in industrial PCs where extended temperature operation and long-term data integrity are required. IC Role / Device Role / Timing Role: Nonvolatile configuration memory providing SMBus-accessible DDR2 timing parameters (tCL, tRCD, tRP) and thermal sensor flags. Use Value: Delivers >40-year data retention at +85 °C and >1M write cycles for initial calibration and rare firmware updates in field-deployed equipment. |
| DDR3 Registered DIMM SPD | Server Memory Module SPD Backup |
Use Scenario: SPD implementation on DDR3 RDIMMs where ECC and register control data must coexist with base memory parameters in standardized byte map. IC Role / Device Role / Timing Role: SPD EEPROM interfacing with memory buffer ICs via SMBus; supports sequential reads across full 256-byte map with ACK polling. Use Value: Enables full DDR3 SPD compliance (JESD21-C Annex L) using 400 kHz I²C mode and hardware WC pin to prevent runtime corruption during buffer initialization. | Use Scenario: Redundant SPD storage on high-availability server memory modules where dual EEPROMs provide fail-safe configuration recovery. IC Role / Device Role / Timing Role: Secondary SPD device sharing same I²C bus; differentiated by unique E0–E2 address mapping to avoid collision during boot-time enumeration. Use Value: Allows identical part number usage across primary/backup positions with zero firmware changes, leveraging built-in 8-device addressing capability. |
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 | 2-Kbit I²C EEPROM without SPD-specific write protection architecture; no PSWP/SWP/CWP instruction set or VHV detection on A0 | Lacks JEDEC SPD compliance features; requires external logic for SPD-style lower-page locking | Select only if SPD functionality is not required and generic 2-Kbit EEPROM suffices |
| M34C02-FDW6TP | Legacy predecessor with identical pinout and SPD function but lower ESD rating and no ECOPACK2® halogen-free certification | Valid for DDR1-only DIMMs; lacks enhanced noise filtering and updated latch-up immunity | Choose for cost-sensitive DDR1 retrofits where RoHS/halogen-free compliance is not mandated |
Compared with AT24C02C-SSHM-T and M34C02-FDW6TP, the M34E02-FDW6TP uniquely integrates SPD-optimized protection (PSWP/SWP/CWP), VHV-sensing E0, and ECOPACK2® packaging-making it the only choice for new DDR2/DDR3 DIMM designs requiring full JEDEC compliance and industrial environmental robustness.
Availability
M34E02-FDW6TP is available at Aetrix Electronics and suitable for DDR1/DDR2/DDR3 memory module manufacturing, server DIMM production, and industrial embedded memory subsystems requiring stable component supply, JEDEC SPD compliance, and long-lifecycle support.
Supply support for M34E02-FDW6TP 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, delivering automotive, industrial, power, and microcontroller solutions with emphasis on reliability and ecological design.
The M34E02-FDW6TP belongs to ST's serial EEPROM product line, engineered specifically for memory module SPD applications requiring JEDEC compliance, multi-voltage operation, and robust write protection in high-density DIMM layouts.
FAQ
What is the purpose of the WC pin on the M34E02-FDW6TP?
The WC (Write Control) pin provides hardware-level write disable for the entire memory array. When driven high (typically tied to VCC), it blocks all write operations-including byte/page writes and protection register updates-regardless of software state. This prevents accidental overwrites during system power transitions or firmware errors, and is commonly used in DIMM manufacturing to lock SPD data after final programming.
How does the M34E02-FDW6TP achieve permanent write protection of the lower 128 bytes?
Permanent protection is achieved via the PSWP (Permanently Set Write Protection) instruction, which requires applying a specific VHV voltage level on the E0 pin while asserting E1/E2 to defined states. Once executed, the protection bit becomes irreversible-even after power cycling-and cannot be cleared by CWP or hardware reset. This ensures JEDEC SPD parameters remain tamper-proof throughout the DIMM's operational life.
Can the M34E02-FDW6TP operate reliably at 1.7 V supply voltage?
Yes, the M34E02-FDW6TP is fully specified down to 1.7 V across its −40 °C to +85 °C operating range. At this minimum voltage, it maintains 400 kHz I²C timing margins, retains >1M write cycles, and supports all protection functions-including VHV detection on E0-provided the VCC ramp rate stays below 1 V/µs and local decoupling (10–100 nF) is implemented per datasheet recommendations.
What package options are available for the M34E02-FDW6TP, and how do they differ mechanically?
The M34E02-FDW6TP is offered in two RoHS-compliant packages: TSSOP8 (DW, 4.4 × 3 mm) and UFDFPN8 (MC, 2 × 3 mm). TSSOP8 uses gull-wing leads for standard reflow soldering and visual inspection; UFDFPN8 is a leadless, ultra-thin package with exposed thermal pad, optimized for space-constrained DIMM PCBs and improved thermal dissipation in high-density memory stacks.
M34E02-FDW6TP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- 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-TSSOP
M34E02-FDW6TP FAQ
1.How can I place an order for M34E02-FDW6TP through Aetrix?
Please submit a Request for Quotation (RFQ) for M34E02-FDW6TP 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-FDW6TP reliable?
The price and inventory of M34E02-FDW6TP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M34E02-FDW6TP is usually 5 days.
3.What payment methods are accepted for M34E02-FDW6TP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M34E02-FDW6TP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for M34E02-FDW6TP?
M34E02-FDW6TP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your M34E02-FDW6TP 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-FDW6TP?
For technical support, including M34E02-FDW6TP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M34E02-FDW6TP requirements.
6.How does Aetrix verify that M34E02-FDW6TP is sourced from the original manufacturer or authorized distributors?
All M34E02-FDW6TP 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-FDW6TP meets industry standards.
7.What is the process for return or replacement of M34E02-FDW6TP?
All M34E02-FDW6TP units undergo pre-shipment inspection (PSI). If there is an issue with M34E02-FDW6TP, 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-FDW6TP part is unused and in its original packaging.
Return procedure for M34E02-FDW6TP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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