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STMicroelectronics M24C32-WMN6TP
- Part No.:
- M24C32-WMN6TP
- Manufacturer:
- STMicroelectronics
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
M24C32-WMN6TP.pdf
- Description:
- IC EEPROM 32KBIT I2C 1MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:30,788
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Product details
Overview
M24C32-WMN6TP from STMicroelectronics is a 32-Kbit I²C-compatible EEPROM organized as 4 K × 8 bits, operating from 2.5 V to 5.5 V over –40 °C to +85 °C. It supports 1 MHz Fast Mode Plus, features 32-byte page write, hardware write protection via WC pin, and delivers >4 million write cycles with >200-year data retention. Used for parameter storage in industrial controllers, sensor calibration modules, and power supply configuration.
For engineers reviewing the M24C32-WMN6TP datasheet, M24C32-WMN6TP pinout, M24C32-WMN6TP application, or M24C32-WMN6TP equivalent, key selection criteria include I²C bus speed compatibility (1 MHz/400 kHz/100 kHz), VCC voltage range (2.5–5.5 V), page size (32 bytes), write protection architecture (WC-controlled), and package footprint (SO8N, 150-mil width).
Technical Context
The device implements a standard I²C target interface with 7-bit device addressing, where E0–E2 pins configure the three LSBs of the slave address (000 by default in SO8N/TSSOP8 packages). It uses an internal address counter that auto-increments during sequential reads and supports both random and current-address read modes.
Write control (WC) is a dedicated hardware input that disables all memory writes when driven high; it does not affect read operations. Internal write cycles complete in ≤5 ms (3.2 ms typical), with built-in power-on reset (POR) ensuring no spurious writes during VCC ramp-up or ramp-down.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 32 Kbit (4 K × 8), enabling storage of firmware flags, calibration coefficients, or device IDs in compact 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 burst-write length without address wrap-around within a single page boundary |
| Supply voltage | 2.5 V to 5.5 V - ensures interoperability with 3.3 V and 5 V logic domains without level-shifting |
| Write endurance | >4 million write cycles - supports frequent field updates in telemetry loggers or adaptive control systems |
| Data retention | >200 years at +25 °C - guarantees long-term integrity of stored configuration across product lifecycle |
| Operating temp | –40 °C to +85 °C - qualified for industrial automation, automotive body electronics, and outdoor IoT nodes |
Pinout & Package
Package: SO8N (150-mil width), RoHS-compliant ECOPACK2, surface-mount with gull-wing leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (E2) | Chip enable LSB | Hardwired low (0) in SO8N; sets bit-1 of 7-bit I²C slave address (0x50–0x57) |
| 2 (E1) | Chip enable middle | Hardwired low (0); contributes to device address uniqueness in multi-device I²C buses |
| 3 (E0) | Chip enable MSB | Hardwired low (0); enables up to 8 identical EEPROMs on same bus with distinct addresses |
| 4 (VSS) | Ground reference | Return path for VCC; requires local 10–100 nF decoupling capacitor adjacent to pin |
| 5 (SDA) | Serial data I/O | Open-drain bidirectional line; requires external pull-up resistor (1–10 kΩ) to VCC |
| 6 (SCL) | Serial clock input | Master-generated clock; timing critical for AC specs (tSU:STA, tHD:STA, etc.) |
| 7 (WC) | Write control | Active-high hardware lock: disables all writes when high; floating = enabled |
| 8 (VCC) | Supply voltage | 2.5–5.5 V DC; must be stable before issuing commands; POR circuit prevents writes during ramp-up |
Key Features
| Feature | Design Value |
|---|---|
| Hardware write protection | WC pin provides unconditional, instantaneous disable of all write operations - no firmware dependency required |
| Fast page write | 32-byte page writes complete in ≤5 ms, reducing bus occupation time vs. byte-by-byte writes |
| Enhanced reliability | ESD ≥4 kV HBM and latch-up immunity per JEDEC JESD78 - suitable for assembly-line handling and noisy environments |
| Address flexibility | E0–E2 inputs allow 8 unique I²C addresses (0x50–0x57) on shared bus - simplifies multi-sensor node design |
| Power-on reset | Internal POR holds device in standby until VCC exceeds threshold - eliminates need for external reset IC |
Applications
| Industrial PLC Configuration Storage | Smart Sensor Calibration Data |
|---|---|
Use Scenario: Storing I/O mapping tables, PID tuning parameters, and alarm thresholds in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile parameter register accessed via I²C during boot or runtime reconfiguration. Use Value: Enables field-upgradable control logic without firmware reflashing; retains settings through power loss. | Use Scenario: Holding factory-trimmed offset/gain coefficients and temperature compensation curves for MEMS accelerometers. IC Role / Device Role / Timing Role: Calibration data repository read once at startup to initialize sensor signal chain. Use Value: Achieves ±0.1% measurement accuracy across –40 °C to +85 °C without external trim components. |
| Power Supply Unit (PSU) Settings | Medical Device Usage Logs |
Use Scenario: Saving user-defined output voltage/current limits, soft-start profiles, and fault recovery modes in digitally controlled DC-DC modules. IC Role / Device Role / Timing Role: Persistent configuration store interfaced to MCU's I²C peripheral during initialization. Use Value: Allows OEM customization without changing BOM; supports multiple PSU variants from single PCB design. | Use Scenario: Recording cumulative operational hours, self-test results, and calibration timestamps in portable diagnostic equipment. IC Role / Device Role / Timing Role: Tamper-resistant event logger with hardware write lock (WC) engaged after initial setup. Use Value: Meets IEC 62304 traceability requirements; prevents accidental overwrite of regulatory audit data. |
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 size, 1 MHz I²C, but operates from 1.7–5.5 V; no WC pin - write protection via software lock bits only | Lacks hardware-level write disable; requires firmware coordination for secure configuration updates | Select when system already uses Microchip ecosystem and software-controlled protection suffices |
| BR24G32FJ-3GE2 (ROHM) | 32 Kbit, 1 MHz I²C, 1.7–5.5 V operation; includes built-in write protect (WP) pin functionally identical to WC | Same hardware lock capability, but DFN8 (2×3 mm) package only - no SO8N option available | Select when board space is constrained and DFN8 footprint is acceptable |
Compared with AT24C32D-SSHM-T and BR24G32FJ-3GE2, M24C32-WMN6TP uniquely combines SO8N package compatibility, 2.5–5.5 V operation (optimized for 3.3 V systems), and WC-based hardware write lock - making it ideal for industrial designs requiring mechanical robustness and deterministic protection.
Availability
M24C32-WMN6TP is available at Aetrix Electronics and suitable for industrial PLC configuration storage, smart sensor calibration data retention, and power supply unit (PSU) settings management requiring stable component supply across extended product lifecycles.
Supply support for M24C32-WMN6TP 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 M24Cxx series targets cost-sensitive, space-constrained embedded systems needing reliable, low-power serial EEPROM with industrial-grade temperature and endurance specs - especially where hardware write protection and I²C speed flexibility are critical.
FAQ
What is the function of the WC pin on M24C32-WMN6TP?
The WC (Write Control) pin is an active-high hardware input that disables all write operations to the entire memory array when driven high. When WC is low or floating, writes are enabled. This provides deterministic, firmware-independent protection against accidental overwrites during power transients or software faults - unlike software lock bits that require functional MCU execution.
Can M24C32-WMN6TP operate reliably at 3.3 V?
Yes. M24C32-WMN6TP is fully specified for 2.5 V to 5.5 V operation, including full I²C timing compliance (1 MHz Fast Mode Plus) at 3.3 V. Its DC and AC parameters - such as tLOW, tHIGH, and tSU:DAT - are guaranteed across this range, making it suitable for direct interface with 3.3 V microcontrollers without level shifters.
Does M24C32-WMN6TP support page write across memory boundaries?
No. Page write is limited to 32-byte pages aligned to 32-byte boundaries (addresses 0x000–0x01F, 0x020–0x03F, etc.). If more than 32 bytes are sent in one transaction, the excess bytes "roll over" to the start of the same page - not the next page. This behavior is defined in Section 5.1.2 of the datasheet and must be managed in firmware to avoid unintended data placement.
Is there an identification page in M24C32-WMN6TP?
No. The 32-byte identification page is exclusive to the M24C32-DF variant. M24C32-WMN6TP has only the main 4 Kbyte memory array. The "W" suffix denotes the 2.5–5.5 V operating range and SO8N/TSSOP8/UFDFPN8/UFDFPN5 packaging options - but excludes the ID page feature found only in "DF" parts.
M24C32-WMN6TP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Programmable:
- 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:
- 2.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
M24C32-WMN6TP FAQ
1.How can I place an order for M24C32-WMN6TP through Aetrix?
Please submit a Request for Quotation (RFQ) for M24C32-WMN6TP 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-WMN6TP reliable?
The price and inventory of M24C32-WMN6TP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M24C32-WMN6TP is usually 5 days.
3.What payment methods are accepted for M24C32-WMN6TP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M24C32-WMN6TP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for M24C32-WMN6TP?
M24C32-WMN6TP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your M24C32-WMN6TP 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-WMN6TP?
For technical support, including M24C32-WMN6TP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M24C32-WMN6TP requirements.
6.How does Aetrix verify that M24C32-WMN6TP is sourced from the original manufacturer or authorized distributors?
All M24C32-WMN6TP 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-WMN6TP meets industry standards.
7.What is the process for return or replacement of M24C32-WMN6TP?
All M24C32-WMN6TP units undergo pre-shipment inspection (PSI). If there is an issue with M24C32-WMN6TP, 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-WMN6TP part is unused and in its original packaging.
Return procedure for M24C32-WMN6TP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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