STMicroelectronics M24C32-DRDW8TP/K

Overview

M24C32-DRDW8TP/K from STMicroelectronics is a 32-Kbit (4 Kbyte) I²C-compatible serial EEPROM with TSSOP8 package, rated for -40 °C to +105 °C operation and 1.7–5.5 V supply. It features 32-byte page write, embedded ECC logic for enhanced data integrity, and a dedicated 32-byte lockable Identification Page used for device ID storage and application parameter retention in automotive body control modules.

For engineers reviewing the M24C32-DRDW8TP/K datasheet, M24C32-DRDW8TP/K pinout, M24C32-DRDW8TP/K application, or M24C32-DRDW8TP/K equivalent, key selection criteria include extended temperature endurance (105 °C), byte/page write timing (≤4 ms), I²C bus speed support (up to 1 MHz), and hardware write protection via WC pin.

Technical Context

The M24C32-DRDW8TP/K implements a true EEPROM cell architecture with on-die high-voltage generation and integrated Error Correction Code (ECC) logic across all 4 Kbytes, enabling single-bit error correction and double-bit error detection per 32-byte page. Its I²C slave interface supports standard (100 kHz), fast (400 kHz), and fast-plus (1 MHz) modes with Schmitt-triggered SCL/SDA inputs for robust noise immunity.

Device addressing uses a 7-bit code (1010b + E2/E1/E0) for main memory access and 1011b for the dedicated Identification Page; the WC pin provides hardware-level write inhibition independent of software commands, while E2/E1/E0 pins configure one of eight possible I²C addresses on a shared bus.

Key Specifications

Pinout & Package

TSSOP8 (DW) package: 8-lead thin shrink small outline, 3 mm × 6.4 mm body, 0.65 mm pitch, RoHS-compliant and halogen-free (ECOPACK2®).

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT24C32D-SSHM-T and BR24G32FJ-3GE2, the M24C32-DRDW8TP/K uniquely combines AEC-Q100 Grade 2 qualification, embedded ECC, 1 MHz I²C, and hardware WC lock - making it the only option for safety-critical, thermally demanding, and high-integrity parameter storage.

Availability

M24C32-DRDW8TP/K is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC configuration storage, medical infusion pump calibration, and smart energy meter firmware parameters requiring stable component supply across extended temperature and voltage ranges.

Supply support for M24C32-DRDW8TP/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 solutions for automotive, industrial, and consumer markets.

The M24C32-DRDW8TP/K belongs to ST's automotive-qualified serial EEPROM product line, engineered specifically for mission-critical data retention in harsh thermal and electrical environments where reliability and long-term data integrity are non-negotiable.

FAQ

What is the function of the WC pin on the M24C32-DRDW8TP/K?

The WC (Write Control) pin is a hardware-level write protection input. When driven high, it disables all write operations-including byte, page, and Identification Page writes-regardless of I²C commands sent. This provides fail-safe prevention of accidental or malicious data corruption during power-up, reset, or system faults. The pin is active-low by default: left floating or pulled low enables normal write functionality.

Does the M24C32-DRDW8TP/K support 1 MHz I²C communication in all operating conditions?

Yes, the M24C32-DRDW8TP/K fully supports 1 MHz I²C communication across its entire specified operating range: −40 °C to +105 °C and 1.7 V to 5.5 V supply. This is confirmed in the AC characteristics table (Table 12 of DocID027419 Rev 2), which specifies t_LOW, t_HIGH, t_SU;STA, and other timing parameters explicitly for 1 MHz operation under worst-case voltage and temperature conditions.

How is the Identification Page secured and what data does it contain by default?

The Identification Page is a dedicated 32-byte memory region containing three ST-programmed bytes (manufacturer code 0x20, family code 0xE0, density code 0x0C) followed by 29 user-writable bytes. It can be permanently locked in read-only mode using the Lock Identification Page instruction. Once locked, no further writes-including erase-are possible, ensuring immutable storage of calibration signatures or security keys.

Is the M24C32-DRDW8TP/K pin-compatible with other M24C32 variants in TSSOP8 package?

Yes, the M24C32-DRDW8TP/K shares identical pinout, footprint, and signal definitions with all M24C32-DRE series devices in TSSOP8 (DW) package, including M24C32-DWDW, M24C32-DFDW, and M24C32-DMDW. Differences lie solely in temperature grade, voltage range, and ECOPACK2® compliance-not in mechanical or electrical interface behavior.