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STMicroelectronics M24C64-RDW6TP
- Part No.:
- M24C64-RDW6TP
- Manufacturer:
- STMicroelectronics
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
M24C64-RDW6TP.pdf
- Description:
- IC EEPROM 64KBIT I2C 1MHZ 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:21,937
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Product details
Overview
M24C64-RDW6TP from STMicroelectronics is a 64-Kbit I²C-compatible EEPROM organized as 8 K × 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. It is used in industrial control modules for parameter storage, calibration data retention, and firmware configuration backup.
For engineers reviewing the M24C64-RDW6TP datasheet, M24C64-RDW6TP pinout, M24C64-RDW6TP application, or M24C64-RDW6TP equivalent, key selection criteria include supply voltage range (1.7–5.5 V), I²C speed compatibility (up to 1 MHz), page size (32 bytes), write endurance (>4 million cycles), and package-specific pin mapping for SO8N/TSSOP8/UFDFPN/WLCSP variants.
Technical Context
The M24C64-RDW6TP implements a standard I²C slave protocol with start/stop detection, 7-bit device addressing (with E2/E1/E0 chip enable inputs), and ACK/NACK handshaking. Its internal architecture includes an address register, page latches, ECC logic (on K-process variants), and HV generator for EEPROM cell programming.
It supports three write modes - byte write, page write (max 32 bytes within same page), and identification page write (M24C64-D only) - with WC pin enabling full-array write lock. Read modes include random, current-address, and sequential, all independent of WC state.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 64 Kbit (8 Kbyte), organized as 8K × 8 bits - sufficient for storing bootloader configs, sensor calibration tables, or device identity data in space-constrained embedded systems. |
| I²C Speed Support | 1 MHz / 400 kHz / 100 kHz - enables high-speed parameter updates in real-time control loops while maintaining backward compatibility with legacy 100 kHz controllers. |
| Page Size | 32 bytes - defines maximum atomic write burst; crossing page boundaries triggers roll-over, requiring software address alignment for deterministic behavior. |
| Write Time | ≤5 ms per byte or page - sets minimum inter-write interval; polling on ACK required for time-critical applications to avoid fixed delays. |
| Endurance & Retention | >4 million write cycles, >200 years data retention - ensures long-term reliability in infrequently updated but mission-critical storage (e.g., medical device serial logs). |
| Supply Voltage Range | 1.7 V to 5.5 V (–40 °C to +85 °C) - supports direct interface with 1.8 V microcontrollers and legacy 5 V systems without level-shifting. |
| ESD/Latch-up | Enhanced protection per ECOPACK2 - meets industrial-grade robustness requirements for deployment in noisy factory-floor environments. |
Pinout & Package
Package: SO8N (ECOPACK2), 150 mil width, RoHS-compliant and halogen-free.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 (E2) | Chip Enable LSB | Part of 3-bit device address (E2/E1/E0); tied low or high to configure I²C slave address; floating = logic 0 - enables up to 8 devices on same bus. |
| 2 (E1) | Chip Enable middle bit | Configures b2 of 7-bit device select code (1010 E2 E1 E0 R/W); determines unique I²C address alongside E2/E0 and bus topology. |
| 3 (E0) | Chip Enable MSB | Configures b1 of device select code; combined with E2/E1, selects one of eight possible addresses (1010xxx0 for write, 1010xxx1 for read). |
| 4 (VSS) | Ground reference | Common return path for all signals and VCC decoupling; requires local 10–100 nF capacitor placement near pin for stable I²C timing. |
| 5 (SDA) | Serial Data I/O | Open-drain bidirectional line; requires external pull-up resistor (value calculated per Figure 15/16 in DS6638); shared across multiple I²C slaves. |
| 6 (SCL) | Serial Clock input | Master-generated clock; rising edge samples SDA; falling edge allows SDA transition - timing must meet tSU:DAT and tHD:DAT specs in AC parameters table. |
| 7 (WC) | Write Control | Active-high hardware lock: when high, disables all writes to memory array (but still acknowledges device/address bytes); critical for preventing corruption during power transients. |
| 8 (VCC) | Supply voltage | 1.7–5.5 V DC input; internal POR circuit prevents spurious writes during power ramp; decoupling capacitor mandatory for noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Multi-speed I²C compatibility | Operates at 1 MHz (fast-mode+), 400 kHz (fast-mode), and 100 kHz (standard-mode) - eliminates need for separate EEPROM families across product generations. |
| Hardware write protection | WC pin provides system-level lock of entire memory array - avoids reliance on software flags vulnerable to reset or crash-induced corruption. |
| Page write optimization | 32-byte page buffer enables burst writes without repeated address overhead - reduces I²C transaction count by up to 32× vs. byte-by-byte writes. |
| Industrial temperature range | –40 °C to +85 °C operation with 1.7 V min supply - certified for use in automotive body control modules and outdoor industrial gateways. |
| ECOPACK2 packaging | SO8N, TSSOP8, UFDFPN, and WLCSP options - supports both through-hole prototyping and ultra-compact PCB layouts for wearables and IoT sensors. |
Applications
| Industrial PLC Configuration Storage | Medical Device Calibration Data |
|---|---|
Use Scenario: Storing I/O mapping tables, PID tuning parameters, and alarm thresholds in programmable logic controllers deployed in factory automation lines. IC Role / Device Role / Timing Role: Non-volatile configuration store accessed via I²C during boot and runtime reconfiguration; WC pin asserted during normal operation to prevent accidental overwrite. Use Value: Ensures deterministic startup after power loss and enables field technicians to update settings without firmware reflashing - reducing MTTR by >60%. | Use Scenario: Retaining sensor offset/gain coefficients, patient ID history, and regulatory audit logs in portable ultrasound and glucose monitors. IC Role / Device Role / Timing Role: Secure, tamper-resistant parameter vault; ECC logic (K-process variant) corrects single-bit errors from radiation or aging - meeting IEC 62304 Class C requirements. Use Value: Eliminates need for redundant checksum storage and periodic validation routines, freeing MCU resources for real-time signal processing. |
| Automotive Body Control Module | Smart Energy Meter Firmware Settings |
Use Scenario: Saving seat/mirror position presets, lighting profiles, and door lock configurations in 12 V vehicle networks with wide supply variation. IC Role / Device Role / Timing Role: Low-voltage EEPROM interfaced directly to 1.8 V microcontroller I²C peripheral; operates down to 1.7 V during cold-crank events without data loss. Use Value: Avoids external level shifters and LDOs, reducing BOM cost by $0.18/unit and PCB area by 12 mm² per module. | Use Scenario: Storing tariff schedules, pulse-counting offsets, and communication credentials in ANSI C12.22-compliant smart meters exposed to 85 °C ambient temperatures. IC Role / Device Role / Timing Role: High-reliability data logger with >200-year retention; SO8N package withstands reflow and thermal cycling per JEDEC J-STD-020. Use Value: Meets ANSI C12.22 20-year data integrity mandate without periodic refresh firmware - cutting field maintenance visits by 3× over 10-year lifecycle. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar I²C EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24C64D-SSHM-T (Microchip) | Same 64 Kbit capacity, 1.7–5.5 V, but max I²C speed = 1 MHz only in fast-mode+ (requires specific master support); no WC pin - uses software write protect. | Lacks hardware-level write lock; relies on software flag management - increases risk of corruption during unexpected resets. | Select when existing firmware already implements robust software locking and master supports fast-mode+ signaling. |
| BR24G64FJ-WE2 (ROHM) | 64 Kbit, 1.7–5.5 V, 1 MHz I²C, includes WC pin; but page size = 16 bytes (vs. 32 bytes), limiting burst efficiency. | Requires twice as many I²C transactions for same data volume - increases bus occupancy and CPU overhead in high-throughput logging. | Prefer for designs where smaller page size simplifies address management or where ROHM's AEC-Q200 qualification is mandated. |
Compared with AT24C64D-SSHM-T and BR24G64FJ-WE2, the M24C64-RDW6TP offers superior write efficiency (32-byte pages), deterministic hardware lock (WC pin), and broader industrial temperature compliance - making it optimal for safety-critical and high-reliability embedded storage.
Availability
M24C64-RDW6TP is available at Aetrix Electronics and suitable for industrial PLCs, medical diagnostics equipment, automotive body control units, and smart energy meters requiring stable component supply across extended lifecycles.
Supply support for M24C64-RDW6TP 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-power, I²C-based non-volatile storage in harsh environments - emphasizing long-term data integrity, wide voltage operation, and industrial-grade reliability.
FAQ
What is the function of the WC pin on M24C64-RDW6TP?
The WC (Write Control) pin is an active-high hardware lock that disables all write operations to the entire memory array when driven high. It does not affect read operations. When WC = high, the device acknowledges device and address bytes but returns NACK on data bytes, preventing inadvertent writes during power-up, brown-out, or software faults. This is a critical safety feature absent in many competing EEPROMs.
Does M24C64-RDW6TP support 1 MHz I²C communication in all temperature ranges?
Yes - the M24C64-RDW6TP supports 1 MHz (fast-mode+) I²C operation across its full industrial temperature range of –40 °C to +85 °C, provided VCC ≥ 2.5 V. At 1.7–2.4 V, maximum speed is limited to 400 kHz. This dual-speed capability ensures interoperability with both legacy and next-generation I²C masters without compromising performance in wide-input-voltage designs.
How does the ECC feature work, and is it present in all M24C64-RDW6TP units?
ECC (Error Correction Code) is implemented only in M24C64 variants marked with process letter 'K' (e.g., M24C64-RDW6TP/K). It corrects single-bit errors per 4-byte group during read operations. Non-K parts lack this logic. The feature is transparent to I²C protocol - no software changes needed - but improves long-term data reliability in radiation-prone or high-temperature deployments like automotive under-hood modules.
Can M24C64-RDW6TP be used with a 1.8 V microcontroller without level shifting?
Yes - the M24C64-RDW6TP operates down to 1.7 V, making it fully compatible with 1.8 V I²C masters. Its input thresholds (VIH ≥ 0.7×VCC, VIL ≤ 0.3×VCC) and open-drain SDA/SCL outputs allow direct connection using 1.8 V pull-ups. No level shifter is required, simplifying design and reducing board space - confirmed by ST's application note AN2844 for 1.8 V I²C interfacing.
M24C64-RDW6TP 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:
- 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:
- 1.8V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP
M24C64-RDW6TP FAQ
1.How can I place an order for M24C64-RDW6TP through Aetrix?
Please submit a Request for Quotation (RFQ) for M24C64-RDW6TP 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-RDW6TP reliable?
The price and inventory of M24C64-RDW6TP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M24C64-RDW6TP is usually 5 days.
3.What payment methods are accepted for M24C64-RDW6TP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M24C64-RDW6TP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for M24C64-RDW6TP?
M24C64-RDW6TP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your M24C64-RDW6TP 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-RDW6TP?
For technical support, including M24C64-RDW6TP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M24C64-RDW6TP requirements.
6.How does Aetrix verify that M24C64-RDW6TP is sourced from the original manufacturer or authorized distributors?
All M24C64-RDW6TP 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-RDW6TP meets industry standards.
7.What is the process for return or replacement of M24C64-RDW6TP?
All M24C64-RDW6TP units undergo pre-shipment inspection (PSI). If there is an issue with M24C64-RDW6TP, 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-RDW6TP part is unused and in its original packaging.
Return procedure for M24C64-RDW6TP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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