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STMicroelectronics M24C64-RMN6P
- Part No.:
- M24C64-RMN6P
- Manufacturer:
- STMicroelectronics
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
M24C64-RMN6P.pdf
- Description:
- IC EEPROM 64KBIT I2C 1MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,283
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Product details
Overview
M24C64-RMN6P 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 - used for nonvolatile parameter storage in industrial sensor nodes and embedded control modules.
For engineers reviewing the M24C64-RMN6P datasheet, M24C64-RMN6P pinout, M24C64-RMN6P application, or M24C64-RMN6P equivalent, key selection criteria include supply voltage range compatibility (1.7–5.5 V), I²C speed mode support, page write timing (≤5 ms), write lockability, and SO8N (ECOPACK2) package footprint alignment with legacy PCB layouts.
Technical Context
The M24C64-RMN6P implements a standard I²C slave interface with start/stop detection, ACK/NACK handshaking, and address decoding using E2/E1/E0 pins (hardwired to 000 in this SO8N variant). It features an internal HV generator and sequencer for EEPROM cell programming, with ECC logic (process-dependent) applied per 4-byte group to correct single-bit read errors.
Write control (WC) enables hardware-level memory locking: when high, all write operations (byte/page/ID page) are inhibited and data bytes receive NoAck; when low or floating, writes proceed. The device includes power-on-reset (POR) circuitry that prevents spurious writes during VCC ramp-up and enforces stable supply conditions before accepting commands.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 64 Kbit (8 Kbyte), organized as 8K × 8 bits - supports firmware configuration storage without external address latching. |
| I²C speed modes | 1 MHz, 400 kHz, and 100 kHz - enables interoperability with high-speed microcontrollers and legacy 100 kHz systems. |
| Supply voltage range | 1.7 V to 5.5 V at –40 °C to +85 °C - compatible with Li-ion battery-powered devices and 3.3 V/5 V mixed-voltage boards. |
| Page write time | ≤5 ms - allows burst writes of up to 32 bytes per cycle, reducing I²C transaction overhead in logging applications. |
| Data retention | 200 years - ensures long-term reliability for calibration data and security keys in unattended equipment. |
| Endurance | 4 million write cycles - supports frequent updates in telemetry buffers and real-time parameter tuning loops. |
| Write protection | Hardware-enabled via WC pin - provides deterministic, glitch-immune lockout independent of software state or I²C bus activity. |
Pinout & Package
Package: SO8N (ECOPACK2), 150 mil width, RoHS-compliant and halogen-free - industry-standard 8-pin small-outline package with 1.27 mm pitch, compatible with automated SMT assembly and IPC-7351B land patterns.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (E2) | Chip enable input | Hardwired low (0) in SO8N; sets LSB of 7-bit I²C address (1010xxxR/W); unused but must be tied to VSS or left floating. |
| 2 (E1) | Chip enable input | Hardwired low (0); second bit of chip address; determines device select code uniqueness on shared I²C bus. |
| 3 (E0) | Chip enable input | Hardwired low (0); third bit of chip address; enables up to 8 M24C64 devices on same bus with distinct addresses. |
| 4 (VSS) | Ground reference | Primary return path for all signals and internal charge pump; requires low-inductance connection to system ground plane. |
| 5 (SDA) | Serial data I/O | Open-drain bidirectional line; requires external pull-up resistor (1–10 kΩ) to VCC; supports wired-AND with other I²C slaves. |
| 6 (SCL) | Serial clock input | Master-generated clock; rising edge samples SDA; falling edge allows SDA transitions; must meet tSU:STA and tHD:STA timing. |
| 7 (WC) | Write control input | Active-high hardware lock; disables all write operations (byte/page/ID) when driven high; floating = enabled. |
| 8 (VCC) | Supply voltage | Power input (1.7–5.5 V); requires local 10–100 nF decoupling capacitor near pin to suppress switching noise and POR transients. |
Key Features
| Feature | Design Value |
|---|---|
| Triple I²C speed support | Operates at 1 MHz (fast-mode+), 400 kHz (fast-mode), and 100 kHz (standard-mode) - eliminates need for bus speed negotiation in multi-master systems. |
| 32-byte page write buffer | Enables efficient bulk writes without repeated address byte transmission - reduces I²C bus occupancy by up to 75% vs. byte-write for 32-byte blocks. |
| Hardware write protect (WC) | Dedicated pin disables all write instructions regardless of I²C command sequence - prevents accidental corruption during firmware updates or brown-out events. |
| Enhanced ESD/latch-up immunity | ±4 kV HBM ESD rating and latch-up immunity per JESD78 - ensures robustness in handling-sensitive industrial environments. |
| ECOPACK2 packaging | RoHS-compliant, halogen-free SO8N package with qualified lead finish - meets automotive and industrial environmental compliance requirements without requalification. |
Applications
| Industrial Sensor Calibration | Smart Meter Firmware Storage |
|---|---|
Use Scenario: Storing factory-calibrated offset/gain coefficients and temperature compensation tables in pressure/flow sensors deployed in oil & gas pipelines. IC Role / Device Role / Timing Role: Nonvolatile parameter store accessed during power-up initialization and runtime correction routines via I²C. Use Value: Enables field-replaceable sensor heads with pre-loaded calibration data, eliminating host MCU dependency for coefficient management. | Use Scenario: Holding firmware update images, cryptographic keys, and tariff tables in utility-grade electricity meters operating for >15 years unattended. IC Role / Device Role / Timing Role: Secure, long-life code/data repository interfaced by metering SoC during boot and OTA update verification. Use Value: 200-year data retention and 4M-cycle endurance ensure integrity across full product lifecycle without refresh cycles. |
| PLC I/O Module Configuration | Medical Device Settings Backup |
Use Scenario: Retaining channel-specific scaling factors, alarm thresholds, and communication parameters in modular programmable logic controller I/O bases. IC Role / Device Role / Timing Role: Persistent configuration register mapped into controller's I²C peripheral address space for hot-swap module identification. Use Value: Allows plug-and-play replacement of analog/digital I/O modules without manual reconfiguration or host-side database sync. | Use Scenario: Saving user-adjusted therapy parameters (e.g., infusion rate, alarm limits) and device serial history in portable insulin pumps and nebulizers. IC Role / Device Role / Timing Role: Safety-critical settings store with hardware write lock (WC pin tied high after setup) to prevent unintended modification. Use Value: WC-based lock ensures FDA-required parameter immutability between clinical sessions while enabling authorized updates via service mode. |
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 (Microchip) | Same 64 Kbit capacity, 1.7–5.5 V, but supports only 400 kHz max I²C speed; no WC pin - uses software write protect. | Lacks hardware-level write lock; unsuitable where deterministic, fail-safe protection against bus glitches is required. | Select if cost sensitivity outweighs need for hardware lock and 1 MHz operation. |
| BR24G64FJ-WE2 (ROHM) | 64 Kbit, 1.7–5.5 V, 1 MHz I²C, includes WC pin, but rated only to +105 °C (vs. +85 °C for M24C64-RMN6P) and uses TSSOP8 package. | Better thermal margin for high-ambient environments; different footprint requires PCB redesign. | Select for extended temperature operation where SO8N footprint is not mandatory. |
Compared with AT24C64D-SSHM-T and BR24G64FJ-WE2, the M24C64-RMN6P uniquely combines 1 MHz I²C, hardware WC lock, SO8N footprint, and industrial –40 °C to +85 °C rating - making it optimal for space-constrained, high-reliability embedded controllers requiring deterministic write safety.
Availability
M24C64-RMN6P is available at Aetrix Electronics and suitable for industrial sensor calibration, smart meter firmware storage, PLC I/O module configuration, and medical device settings backup requiring stable component supply across multi-year production programs.
Supply support for M24C64-RMN6P 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 products 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 nonvolatile storage in harsh industrial and long-lifecycle embedded applications.
FAQ
What is the function of the WC pin on M24C64-RMN6P?
The WC (Write Control) pin is an active-high hardware lock that disables all write operations - including byte write, page write, and identification page access - when driven high. When low or floating, writes are enabled. This provides deterministic, glitch-immune protection independent of I²C bus state or firmware execution, critical for safety-critical and field-deployed systems.
Does M24C64-RMN6P support 1 MHz I²C operation across its full temperature range?
Yes. The M24C64-RMN6P supports 1 MHz I²C fast-mode+ operation from –40 °C to +85 °C, as confirmed in DS6638 Rev 38 Section 1. Verified AC timing parameters (tBUF, tHD:STA, tSU:STA) meet fast-mode+ specifications across the full industrial temperature range with 1.7–5.5 V supply.
Can the M24C64-RMN6P be used in place of the M24C64-W or M24C64-F variants?
Yes, with voltage range consideration: M24C64-RMN6P (1.7–5.5 V) replaces M24C64-W (2.5–5.5 V) and M24C64-F (1.7–5.5 V) in most designs. It is not a drop-in for M24C64-D (which adds a lockable ID page), nor for M24C64-DF (which supports 1.6 V under restricted conditions). Pinout and instruction set are identical across the M24C64 family.
Is ECC (error correction code) implemented in the M24C64-RMN6P?
ECC is implemented only in devices marked with process letter 'K' (e.g., M24C64-RMN6P*K). Standard M24C64-RMN6P units do not include ECC logic. When present, ECC corrects single-bit errors per 4-byte group during read operations but does not affect write endurance distribution - cycling budget remains defined at the 4-byte group level.
M24C64-RMN6P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- 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:
- 1.8V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
M24C64-RMN6P FAQ
1.How can I place an order for M24C64-RMN6P through Aetrix?
Please submit a Request for Quotation (RFQ) for M24C64-RMN6P 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-RMN6P reliable?
The price and inventory of M24C64-RMN6P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M24C64-RMN6P is usually 5 days.
3.What payment methods are accepted for M24C64-RMN6P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M24C64-RMN6P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for M24C64-RMN6P?
M24C64-RMN6P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your M24C64-RMN6P 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-RMN6P?
For technical support, including M24C64-RMN6P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M24C64-RMN6P requirements.
6.How does Aetrix verify that M24C64-RMN6P is sourced from the original manufacturer or authorized distributors?
All M24C64-RMN6P 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-RMN6P meets industry standards.
7.What is the process for return or replacement of M24C64-RMN6P?
All M24C64-RMN6P units undergo pre-shipment inspection (PSI). If there is an issue with M24C64-RMN6P, 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-RMN6P part is unused and in its original packaging.
Return procedure for M24C64-RMN6P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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