STMicroelectronics M24C64-DRDW8TP/K

Overview

M24C64-DRDW8TP/K from STMicroelectronics is a 64-Kbit (8 Kbyte) I²C-compatible serial EEPROM with TSSOP8 package, rated for -40 °C to +105 °C operation and 1.7 V–5.5 V supply voltage. It features 32-byte page write capability, embedded ECC logic for enhanced data integrity, and a dedicated 32-byte lockable Identification Page for device ID and application parameters. Used in automotive body control modules for storing calibration data and configuration profiles.

For engineers reviewing the M24C64-DRDW8TP/K datasheet, M24C64-DRDW8TP/K pinout, M24C64-DRDW8TP/K application, or M24C64-DRDW8TP/K equivalent, key selection criteria include extended temperature support (105 °C), I²C bus compatibility up to 1 MHz, byte/page write timing (≤4 ms), write endurance at high temperature (900 k cycles @ 105 °C), and hardware write protection via WC pin.

Technical Context

The M24C64-DRDW8TP/K implements a true EEPROM memory array organized as 256 pages × 32 bytes, with dedicated ECC logic applied per 4-byte group to detect and correct single-bit errors. Its I²C interface supports standard (100 kHz), fast (400 kHz), and fast-plus (1 MHz) modes, with Schmitt-trigger inputs on SCL/SDA for robust noise immunity in electrically noisy environments.

Device addressing uses a 7-bit slave address formed by fixed 1010b prefix plus user-configurable E2/E1/E0 pins, enabling up to eight devices on one bus. The Write Control (WC) pin provides hardware-level write inhibition across the entire memory array, while the separate Identification Page supports permanent locking after programming - critical for secure parameter storage in AEC-Q100 Grade 2 automotive applications.

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 AT24C64D-SSHM-T and BR24G64FJ-3GE2, the M24C64-DRDW8TP/K uniquely combines AEC-Q100 Grade 2 qualification, hardware WC pin, embedded ECC, and 1 MHz I²C - making it the only option qualified for safety-critical automotive parameter storage with deterministic write timing and error resilience.

Availability

M24C64-DRDW8TP/K is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC configuration storage, and medical infusion pump calibration requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for M24C64-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 M24C64-DRDW8TP/K belongs to ST's automotive-qualified serial EEPROM product line, engineered specifically for AEC-Q100 Grade 2 applications demanding high reliability, extended temperature operation, and hardware-level data protection in safety-critical systems.

FAQ

What is the function of the WC pin on the M24C64-DRDW8TP/K?

The WC (Write Control) pin is a hardware-level write protection input. When driven high, it disables all write operations to the entire memory array-including main memory and Identification Page-regardless of I²C command. This prevents accidental overwrites during power transients, ECU resets, or bus contention, and is independent of software lock mechanisms.

Does the M24C64-DRDW8TP/K support 1 MHz I²C communication in all temperature ranges?

Yes. The M24C64-DRDW8TP/K fully supports 1 MHz I²C operation across its full specified temperature range (-40 °C to +105 °C) and supply voltage range (1.7 V to 5.5 V), as confirmed in Section 8 (DC and AC parameters) of the official ST datasheet DocID027358 Rev 2.

How is the Identification Page secured against unauthorized modification?

The Identification Page can be permanently locked in read-only mode using the "Lock Identification Page" instruction (Section 4.1.4). Once locked, no further writes-including erase or reprogramming-are possible, even if WC is low. Lock status is verified via the "Read the lock status" command, and the lock operation is irreversible.

What packaging variant does M24C64-DRDW8TP/K correspond to?

M24C64-DRDW8TP/K uses the TSSOP8 (DW) package: 8-lead thin shrink small outline, 3 mm × 6.4 mm body, 0.65 mm pitch, with ECOPACK2® RoHS/halogen-free compliance. The "DW" in the part number explicitly denotes this TSSOP8 variant per ST's ordering scheme (Table 16, DocID027358 Rev 2).