STMicroelectronics M24C64-DRMN8TP/K

Overview

M24C64-DRMN8TP/K from STMicroelectronics is a 64-Kbit (8 Kbyte) I²C-compatible serial EEPROM with 32-byte page architecture, Schmitt-trigger inputs, and extended industrial temperature operation up to +105 °C. It supports 1 MHz I²C bus speed, features an additional lockable 32-byte Identification Page for device ID and application parameters, and delivers 4 million write cycles at 25 °C. It is used in automotive body control modules for storing calibration data and configuration profiles.

For engineers reviewing the M24C64-DRMN8TP/K datasheet, M24C64-DRMN8TP/K pinout, M24C64-DRMN8TP/K application, or M24C64-DRMN8TP/K equivalent, key selection criteria include I²C timing compliance at 1 MHz, -40 °C to +105 °C operational range, 1.7–5.5 V supply tolerance, byte/page write latency ≤4 ms, and hardware write protection via WC pin.

Technical Context

The device operates as a slave on the I²C bus using standard Start/Stop conditions and 7-bit addressing with three Chip Enable (E2/E1/E0) pins enabling up to eight devices on one bus. Device select codes 1010b (memory access) and 1011b (Identification Page access) determine functional mode.

It integrates embedded Error Correction Code (ECC) logic across the main memory array to improve data integrity during read/write operations. The Identification Page supports permanent lock-in to read-only mode after programming, preventing accidental overwrites of critical identifiers or calibration values.

Key Specifications

Pinout & Package

Package: SO8N (8-lead plastic small outline, 4.9 × 6 mm, 150 mil body width, RoHS-compliant ECOPACK2®).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar serial EEPROM applications.

Compared with AT24C64D-SSHM-T and BR24G64FJ-3GE2, the M24C64-DRMN8TP/K uniquely combines AEC-Q100 Grade 2 qualification, ECC-enhanced reliability, and a lockable Identification Page - making it the only option supporting both automotive-grade durability and secure device identity management in a single package.

Availability

M24C64-DRMN8TP/K is available at Aetrix Electronics and suitable for automotive body electronics, industrial programmable logic controllers, and smart energy metering systems requiring stable component supply across extended temperature and voltage ranges.

Supply support for M24C64-DRMN8TP/K 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 products for automotive, industrial, and consumer markets.

The M24C64-DRMN8TP/K belongs to ST's M24Cxx-DRE EEPROM family, engineered specifically for high-reliability automotive and industrial applications demanding extended temperature operation, robust I²C timing, and secure configuration storage.

FAQ

What is the function of the WC pin on the M24C64-DRMN8TP/K?

The WC (Write Control) pin provides hardware-level write protection: when driven high, it disables all write operations to the entire memory array-including main memory and Identification Page-while still allowing reads and device addressing. This prevents accidental overwrites during power transients or software faults. WC is active-low by default; leaving it floating enables writes, and tying it low achieves the same effect.

How does the Identification Page differ from the main memory array?

The Identification Page is a dedicated 32-byte section separate from the main 64-Kbit memory. Its first three bytes contain factory-programmed ST device identification (0x20, 0xE0, 0x0D); the remaining 29 bytes are user-writable for application-specific data. Unlike main memory, the entire Identification Page can be permanently locked to read-only mode via a specific I²C command sequence, ensuring immutability of critical identifiers or calibration values.

Can the M24C64-DRMN8TP/K operate reliably at 1.7 V and 105 °C simultaneously?

Yes-the device is fully specified and tested for concurrent operation at 1.7 V supply and +105 °C ambient temperature. DC and AC parameters-including t_WR ≤4 ms, t_LOW/t_HIGH timing margins, and ACK response-remain compliant across this combined corner condition, as confirmed in Table 7 (Operating Conditions) and Table 12 (1 MHz AC Characteristics) of the official datasheet (DocID027358 Rev 2).

Is ECC functionality user-configurable or always active?

ECC is always active and transparently applied to all read and write operations in the main memory array (but not the Identification Page). It automatically corrects single-bit errors and detects double-bit errors without software intervention or additional overhead. No configuration register or enable bit exists-the logic is hardwired into the memory controller and requires no host MCU support.