My Inquiry
My Account
STMicroelectronics M24C64-WDW6TP
- Part No.:
- M24C64-WDW6TP
- Manufacturer:
- STMicroelectronics
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
M24C64-WDW6TP.pdf
- Description:
- IC EEPROM 64KBIT I2C 1MHZ 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:10,206
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
M24C64-WDW6TP from STMicroelectronics is a 64-Kbit (8 Kbyte) I²C-compatible EEPROM organized as 8K × 8 bits, operating from 2.5 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 - used for firmware parameter storage in industrial control modules.
For engineers reviewing the M24C64-WDW6TP datasheet, M24C64-WDW6TP pinout, M24C64-WDW6TP application, or M24C64-WDW6TP equivalent, key selection considerations include supply voltage range compatibility, I²C speed mode support, page write timing (≤5 ms), WC-controlled full-array write lock, and SO8N (ECOPACK2) package footprint alignment with legacy board layouts.
Technical Context
This device implements a slave-only I²C interface with fixed 7-bit device address (1010xxxR/W), where E0–E2 pins configure the three LSBs; for M24C64-WDW6TP (SO8N package), E0–E2 are externally tied to define unique bus addressing. It features an internal address counter that auto-increments during sequential reads and supports both random and current-address read modes.
The memory array includes ECC logic (process-dependent) for single-bit error correction per 4-byte group, enhancing long-term data integrity in mission-critical logging applications; write operations trigger an internal tW cycle (max 5 ms), during which SDA is released and the device ignores bus traffic until completion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 64 Kbit (8 Kbyte), organized as 8K × 8 bits - supports firmware configuration tables and calibration data storage. |
| I²C speed modes | 1 MHz / 400 kHz / 100 kHz - enables interoperability with high-speed microcontrollers and legacy 100 kHz systems. |
| Supply voltage | 2.5 V to 5.5 V at –40 °C to +85 °C - compatible with 3.3 V and 5 V logic domains without level shifting. |
| Write time | ≤5 ms for byte or page write - ensures fast nonvolatile updates during system boot or runtime reconfiguration. |
| Endurance | 4 million write cycles - supports frequent parameter logging in data acquisition nodes. |
| Data retention | 200 years at +25 °C - guarantees long-term reliability in unattended infrastructure monitoring devices. |
| Write protection | Hardware-enabled via WC pin - prevents accidental overwrites during power transients or firmware glitches. |
Pinout & Package
Package: SO8N (ECOPACK2), 150 mil width, RoHS-compliant and halogen-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| E0, E1, E2 | Chip enable inputs | Set 3 LSBs of 7-bit I²C device address (1010xxx); externally tied to VSS/VCC to assign unique bus address. |
| SDA | Serial data I/O | Open-drain bidirectional line requiring external pull-up; carries address, command, and data bytes per I²C protocol. |
| SCL | Serial clock input | Master-generated clock synchronizing all data transfers; must meet rise/fall time and frequency specs per mode. |
| WC | Write control input | Active-high hardware lock disabling all writes to entire memory array - critical for fail-safe configuration integrity. |
| VCC | Supply voltage | 2.5–5.5 V DC input; requires local 10–100 nF decoupling capacitor near pin for stable operation during write cycles. |
| VSS | Ground reference | Common return path for all signals and internal circuitry; must be low-impedance connection to system ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| Page write (32-byte burst) | Reduces firmware update time by 32× vs. byte-write; eliminates host-side address management overhead. |
| Hardware write protect (WC pin) | Prevents corruption during brown-out or reset events without software intervention or fuse programming. |
| Enhanced ESD/latch-up protection | Withstands ≥4 kV HBM ESD and meets industrial-level latch-up immunity - suitable for harsh factory-floor environments. |
| ECOPACK2 packaging | RoHS-compliant, halogen-free SO8N footprint ensures drop-in replacement in existing PCB designs and simplifies compliance reporting. |
| Internal power-on reset (POR) | Blocks instruction execution until VCC stabilizes above threshold - eliminates spurious writes during power ramp-up. |
Applications
| Industrial PLC Configuration Storage | Smart Meter Firmware Parameter Backup |
|---|---|
Use Scenario: Storing calibrated sensor offsets and communication settings in programmable logic controllers deployed in factory automation lines. IC Role / Device Role / Timing Role: Nonvolatile configuration register holding persistent operational parameters accessible via I²C during cold start or field reprogramming. Use Value: Enables zero-touch commissioning after power loss and supports remote firmware updates without requiring external backup batteries. | Use Scenario: Retaining tariff schedules, metering calibration constants, and security keys in utility-grade electricity meters operating for >15 years. IC Role / Device Role / Timing Role: Secure, tamper-resistant parameter vault accessed only by authenticated MCU during boot and scheduled maintenance windows. Use Value: Meets IEC 62056-21 and ANSI C12.22 requirements for data integrity and retention under extended temperature cycling. |
| Medical Device Calibration Data Archive | Automotive Body Control Module Settings |
Use Scenario: Archiving factory-calibrated ADC gain/offset values and user-adjusted display brightness profiles in portable diagnostic equipment. IC Role / Device Role / Timing Role: Fail-safe configuration store with WC-pin lock activated during normal operation to prevent runtime corruption. Use Value: Ensures regulatory compliance (IEC 62304 Class B) by guaranteeing calibration traceability across device lifetime. | Use Scenario: Holding seat position presets, mirror angle memories, and lighting configuration profiles in automotive BCMs. IC Role / Device Role / Timing Role: Low-power, high-reliability EEPROM interfaced directly to 5 V CAN/LIN microcontrollers without level shifters. Use Value: Supports ASIL-B functional safety requirements via 200-year data retention and 4M-cycle endurance under thermal stress. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24C64D-SSHM-T | 1.7–5.5 V operation; no WC pin; uses software write protect (WP bit in status register) | Lacks hardware-level write lock - unsuitable for systems requiring guaranteed protection during power faults | Select when software-controlled protection suffices and board space allows minor layout change for WP pin routing |
| BR24G64FJ-WE2 | 1.6–5.5 V; built-in error detection (no ECC); 1 MHz I²C only; TSSOP8 package | Lower voltage floor but no single-bit correction - less robust in high-radiation or long-life deployments | Choose for cost-sensitive consumer applications where 200-year retention is not mandated |
Compared with AT24C64D-SSHM-T and BR24G64FJ-WE2, M24C64-WDW6TP provides deterministic hardware write lock and ECC-enhanced reliability - making it preferred for industrial and medical systems where configuration integrity cannot rely on firmware state.
Availability
M24C64-WDW6TP is available at Aetrix Electronics and suitable for industrial PLCs, smart meters, medical diagnostics equipment, and automotive body control modules requiring stable component supply across multi-year production cycles.
Supply support for M24C64-WDW6TP 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, designing and manufacturing microcontrollers, power ICs, sensors, and memory solutions for industrial, automotive, and consumer markets.
M24C64 belongs to ST's serial EEPROM product line, engineered specifically for robust, low-power, I²C-based nonvolatile storage in space-constrained and thermally demanding embedded systems.
FAQ
What is the function of the WC pin on M24C64-WDW6TP?
The WC (Write Control) pin is an active-high hardware lock that disables all write operations to the entire memory array when driven high. When WC is low or floating, writes are enabled. This provides fail-safe protection against unintended writes during power-up, brown-out, or firmware crashes - unlike software-based write protection, it requires no MCU intervention or register access.
Does M24C64-WDW6TP support 1 MHz I²C operation across its full temperature range?
Yes, M24C64-WDW6TP supports 1 MHz I²C operation from –40 °C to +85 °C when powered within its specified 2.5 V to 5.5 V supply range. The AC timing parameters (tLOW, tHIGH, tSU;STA) are fully characterized at this speed in the DS6638 datasheet Rev 38, ensuring reliable high-speed communication without bus arbitration issues.
How does the ECC feature work, and is it present in all M24C64-WDW6TP units?
ECC (Error Correction Code) detects and corrects single-bit errors per 4-byte group during read operations. It is implemented only in devices marked with process letter 'K' - standard M24C64-WDW6TP units may or may not include ECC depending on wafer lot. ECC functionality is transparent to I²C protocol and requires no host-side configuration.
Can M24C64-WDW6TP be used with a 1.8 V microcontroller I²C interface?
No - M24C64-WDW6TP (W-suffix) requires minimum 2.5 V VCC for operation across –40 °C to +85 °C. For 1.8 V systems, ST recommends M24C64-R or M24C64-F variants. Direct interfacing with 1.8 V I²C masters risks undervoltage lockout and unreliable ACK/NACK signaling unless level-shifting circuitry is added.
M24C64-WDW6TP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Programmable:
- 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:
- 2.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP
M24C64-WDW6TP FAQ
1.How can I place an order for M24C64-WDW6TP through Aetrix?
Please submit a Request for Quotation (RFQ) for M24C64-WDW6TP 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-WDW6TP reliable?
The price and inventory of M24C64-WDW6TP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M24C64-WDW6TP is usually 5 days.
3.What payment methods are accepted for M24C64-WDW6TP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M24C64-WDW6TP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for M24C64-WDW6TP?
M24C64-WDW6TP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your M24C64-WDW6TP 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-WDW6TP?
For technical support, including M24C64-WDW6TP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M24C64-WDW6TP requirements.
6.How does Aetrix verify that M24C64-WDW6TP is sourced from the original manufacturer or authorized distributors?
All M24C64-WDW6TP 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-WDW6TP meets industry standards.
7.What is the process for return or replacement of M24C64-WDW6TP?
All M24C64-WDW6TP units undergo pre-shipment inspection (PSI). If there is an issue with M24C64-WDW6TP, 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-WDW6TP part is unused and in its original packaging.
Return procedure for M24C64-WDW6TP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
M24C64-WDW6TP Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
-
AT24C02C-SSHM-T
Microchip Technology
-
24LC01BT-I/OT
Microchip Technology
-
M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
-
AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
-
24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
Tech Hub
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
