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STMicroelectronics M24C32-RMN6TP
- Part No.:
- M24C32-RMN6TP
- Manufacturer:
- STMicroelectronics
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
M24C32-RMN6TP.pdf
- Description:
- IC EEPROM 32KBIT I2C 1MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,301
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Product details
Overview
M24C32-RMN6TP from STMicroelectronics is a 32-Kbit I²C-compatible EEPROM organized as 4 K × 8 bits, operating from 1.7 V to 5.5 V over –40 °C to +85 °C, with 32-byte page write capability and hardware write protection via WC pin. It supports Fast Mode Plus (1 MHz), Fast Mode (400 kHz), and Standard Mode (100 kHz) I²C bus operation and is used in industrial sensor calibration storage and embedded system configuration retention.
For engineers reviewing the M24C32-RMN6TP datasheet, M24C32-RMN6TP pinout, M24C32-RMN6TP application, or M24C32-RMN6TP equivalent, key selection criteria include supply voltage range (1.7–5.5 V), I²C speed mode compatibility, page size (32 bytes), write cycle time (≤5 ms), and hardware write control (WC) functionality for memory protection.
Technical Context
This EEPROM implements a standard I²C target interface with 7-bit device addressing and R/W bit control, supporting random and sequential read modes plus byte/page write operations. Its internal address counter auto-increments after each read/write, and it features built-in power-on reset (POR) to prevent spurious writes during power-up transitions.
The device includes dedicated chip enable inputs (E2–E0) for multi-device bus addressing and a write control (WC) input that disables all write operations when driven high. For the MN package variant (SO8N), E2–E0 are externally accessible and configurable; in UFDFPN5 variants, they are internally tied low.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory capacity | 32 Kbit (4 K × 8 bits), enabling storage of firmware parameters or calibration data for mid-complexity embedded systems |
| I²C speed modes | Supports 1 MHz (Fast Mode Plus), 400 kHz (Fast Mode), and 100 kHz (Standard Mode) - compatible with legacy and high-speed controllers |
| Page size | 32 bytes per page - defines maximum atomic write burst without roll-over; critical for efficient configuration updates |
| Write cycle time | ≤5 ms (byte or page), typical 3.2 ms - determines minimum interval between successive write commands |
| Supply voltage range | 1.7 V to 5.5 V at –40 °C to +85 °C - enables direct interfacing with 1.8 V, 3.3 V, and 5 V microcontrollers without level shifting |
| Data retention | 200 years - ensures long-term reliability for infrequently updated settings in unattended equipment |
| Endurance | 4 million write cycles - supports frequent recalibration or logging in test instrumentation and industrial controls |
Pinout & Package
Package: SO8N (150 mil width, ECOPACK2-compliant). Pin assignments conform to standard 8-pin SOIC layout with exposed pad not present.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (E2) | Chip enable LSB | Configures device address bits b1 of 7-bit I²C select code; tied low by default in MN package |
| 2 (E1) | Chip enable middle bit | Configures device address bits b2; allows up to 8 devices on same I²C bus with unique addresses |
| 3 (E0) | Chip enable MSB | Configures device address bits b3; combined with E2/E1, sets three LSBs of device ID (1010xxx) |
| 4 (VSS) | Ground reference | Return path for all internal logic and I/O; requires low-impedance connection to system ground plane |
| 5 (SDA) | Serial data I/O | Open-drain bidirectional line; requires external pull-up resistor (typically 1–10 kΩ to VCC) |
| 6 (SCL) | Serial clock input | Master-generated clock synchronizing all I²C transfers; edge-triggered sampling on rising edge |
| 7 (WC) | Write control | Active-high hardware lock disabling all write operations including byte/page/ID page writes |
| 8 (VCC) | Supply voltage | Power input (1.7–5.5 V); must be decoupled with 10–100 nF capacitor near pins 4 and 8 |
Key Features
| Feature | Design Value |
|---|---|
| Hardware write protection | WC pin disables entire memory array write access - eliminates need for software-based lock bits or command sequences |
| Identification page (M24C32-DF only) | Not applicable to M24C32-RMN6TP - this variant lacks the 32-byte ID page and associated lock functionality |
| Enhanced ESD/latch-up immunity | Withstands >4 kV HBM ESD and robust latch-up immunity - suitable for industrial environments with noisy power rails |
| POR circuitry | Prevents spurious writes during power ramp-up/down - ensures reliable initialization without external reset supervision |
| ECOPACK2 packaging | Halogen-free, RoHS-compliant SO8N package - meets environmental compliance requirements for global OEM production |
Applications
| Industrial Sensor Calibration | Embedded System Configuration |
|---|---|
Use Scenario: Storing factory-calibrated offset/gain coefficients for temperature, pressure, or current sensors in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile parameter storage accessed via I²C during boot or maintenance mode; no timing-critical real-time interaction required. Use Value: Enables field-replaceable sensor modules with persistent calibration data independent of host MCU firmware version. | Use Scenario: Retaining user-configured settings (e.g., display brightness, network IP, alarm thresholds) across power cycles in medical diagnostic devices. IC Role / Device Role / Timing Role: Low-bandwidth configuration register bank; accessed during startup or menu navigation, not during signal acquisition. Use Value: Eliminates need for battery-backed SRAM while supporting >4 million reconfiguration events over product lifetime. |
| Smart Meter Firmware Patch Storage | Automotive Body Control Module Settings |
Use Scenario: Holding small firmware patches or cryptographic keys for secure OTA updates in electricity/water meters with constrained memory MCUs. IC Role / Device Role / Timing Role: Secure auxiliary code/data repository; accessed only during update verification phase, not runtime. Use Value: Provides tamper-resistant storage for critical update metadata without requiring full-flash MCU reprogramming. | Use Scenario: Saving seat/mirror position presets, lighting profiles, or door lock behavior preferences in automotive BCMs. IC Role / Device Role / Timing Role: Persistent user preference store; written infrequently during setup, read at vehicle power-on. Use Value: Supports 200-year data retention and 1.7 V operation - compatible with stop-start battery voltage sag conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24C32D-SSHM-T (Microchip) | Same 32 Kbit capacity, 1.7–5.5 V, I²C up to 1 MHz; lacks WC pin - write protection implemented via software lock bits only | No hardware-level write disable; requires firmware coordination to prevent accidental overwrites during debug sessions | Select when board space permits software-managed protection and no requirement for fail-safe hardware lock |
| BR24G32FJ-WE2 (ROHM) | 32 Kbit, 1.6–5.5 V, supports 1 MHz I²C; includes WC pin but uses different pinout (WC on pin 7 vs. M24C32-RMN6TP's pin 7) | Pin-compatible only in TSSOP8; SO8N pin mapping differs - requires PCB redesign for drop-in replacement | Select when lowest-voltage operation (1.6 V) is mandatory and TSSOP8 package is acceptable |
Compared with AT24C32D-SSHM-T and BR24G32FJ-WE2, M24C32-RMN6TP uniquely combines SO8N pinout compatibility, hardware WC pin on pin 7, and guaranteed 1.7 V minimum operation - making it optimal for cost-sensitive industrial designs requiring robust physical write disable.
Availability
M24C32-RMN6TP is available at Aetrix Electronics and suitable for industrial sensor calibration, embedded configuration storage, and smart meter firmware patching requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for M24C32-RMN6TP 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.
M24C32-RMN6TP belongs to ST's M24C serial EEPROM product line, engineered for high-reliability nonvolatile data storage in resource-constrained embedded systems where low-voltage operation, I²C compatibility, and hardware write protection are essential.
FAQ
What is the function of the WC pin on M24C32-RMN6TP?
The WC (Write Control) pin is an active-high input that disables all write operations-including byte write, page write, and identification page access-when driven high. When WC is low or floating, writes are enabled. This hardware-level protection prevents accidental overwrites during power transients or firmware errors, eliminating reliance on software lock mechanisms.
Does M24C32-RMN6TP include an identification page?
No. The identification page (32-byte dedicated area with permanent lock capability) is exclusive to the M24C32-DF variant. M24C32-RMN6TP is the standard R-grade version and contains only the main 4 K × 8-bit memory array with no additional ID page or lock instruction support.
Can M24C32-RMN6TP operate at 1.7 V while maintaining full I²C speed modes?
Yes. At 1.7 V supply and –40 °C to +85 °C, M24C32-RMN6TP supports Standard Mode (100 kHz) and Fast Mode (400 kHz) I²C operation. Fast Mode Plus (1 MHz) is specified down to 2.5 V; therefore, 1 MHz operation is not guaranteed below 2.5 V per ST's DS0952 Rev 33 specifications.
Is the SO8N package of M24C32-RMN6TP lead-free and RoHS compliant?
Yes. The SO8N package used in M24C32-RMN6TP is ECOPACK2-compliant, meaning it is halogen-free and fully RoHS-compliant (Pb-free terminations, compliant with EU Directive 2011/65/EU and amendments), certified for use in environmentally regulated industrial and medical applications.
M24C32-RMN6TP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 32Kbit
- Memory Organization:
- 4K 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
M24C32-RMN6TP FAQ
1.How can I place an order for M24C32-RMN6TP through Aetrix?
Please submit a Request for Quotation (RFQ) for M24C32-RMN6TP 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 M24C32-RMN6TP reliable?
The price and inventory of M24C32-RMN6TP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M24C32-RMN6TP is usually 5 days.
3.What payment methods are accepted for M24C32-RMN6TP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M24C32-RMN6TP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for M24C32-RMN6TP?
M24C32-RMN6TP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your M24C32-RMN6TP 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 M24C32-RMN6TP?
For technical support, including M24C32-RMN6TP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M24C32-RMN6TP requirements.
6.How does Aetrix verify that M24C32-RMN6TP is sourced from the original manufacturer or authorized distributors?
All M24C32-RMN6TP 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 M24C32-RMN6TP meets industry standards.
7.What is the process for return or replacement of M24C32-RMN6TP?
All M24C32-RMN6TP units undergo pre-shipment inspection (PSI). If there is an issue with M24C32-RMN6TP, 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 M24C32-RMN6TP part is unused and in its original packaging.
Return procedure for M24C32-RMN6TP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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