STMicroelectronics M24C01-WDW6TP

Overview

M24C01-WDW6TP from STMicroelectronics is a 1-Kbit (128-byte) I²C-compatible serial EEPROM organized as 128 × 8 bits, operating with supply voltage from 2.5 V to 5.5 V and supporting Fast Mode (400 kHz) and Standard Mode (100 kHz) I²C bus protocols. It features hardware write protection via WC pin, 16-byte page write capability, and is packaged in RoHS-compliant TSSOP8 (DW, 169 mil width). It is commonly used for configuration storage in industrial controllers, sensor calibration data retention, and boot parameter backup in embedded microcontroller systems.

For engineers reviewing the M24C01-WDW6TP datasheet, M24C01-WDW6TP pinout, M24C01-WDW6TP application, or M24C01-WDW6TP equivalent, key selection considerations include its 2.5–5.5 V operating range, 4-million-cycle endurance, 200-year data retention at 55 °C, WC-controlled full-array write protection, and compatibility with standard I²C master implementations requiring deterministic ACK polling during write cycles.

Technical Context

The M24C01-WDW6TP implements a slave-only I²C interface with fixed 7-bit device address prefix 1010xxx (where E2/E1/E0 pins set LSBs), supporting random and sequential read modes and byte/page write operations. Its internal architecture includes a page latch, X/Y decoders, sense amplifiers, and an HV generator for EEPROM programming, all managed by a dedicated control logic sequencer.

Write control (WC) is a dedicated active-high input that disables all write operations-including byte, page, and address setup-while still allowing device select and address byte acknowledgment. The device incorporates a power-on-reset (POR) circuit ensuring no spurious writes occur during power ramp-up, and supports ACK polling to detect write cycle completion without fixed timing delays.

Key Specifications

Pinout & Package

Packaged in TSSOP8 (DW, 169 mil width), the M24C01-WDW6TP uses a surface-mount 8-pin layout with exposed pad not present; pin 1 is marked by a beveled corner or dot. All pins are CMOS-compatible with 0.3×VCC/0.7×VCC input thresholds and 8 pF SDA input capacitance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT24C01D-SSHM-T and BR24G01FJ-WE2, the M24C01-WDW6TP provides superior write endurance (4M vs. 1M cycles), longer data retention (200 vs. 100 years), and guaranteed hardware write protection - making it preferred for industrial, medical, and automotive applications demanding long-term reliability and deterministic failure modes.

Availability

M24C01-WDW6TP is available at Aetrix Electronics and suitable for industrial PLC configuration storage, smart sensor calibration data retention, and embedded boot parameter backup requiring stable component supply across multi-year production programs.

Supply support for M24C01-WDW6TP 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 analog, MCU, power, and memory solutions for industrial, automotive, and consumer markets.

The M24Cxx-W series targets cost-sensitive, high-reliability embedded systems requiring guaranteed I²C EEPROM functionality with hardware-level write security and extended temperature operation.

FAQ

What is the function of the WC pin on the M24C01-WDW6TP?

The WC (Write Control) pin is an active-high hardware enable that disables all write operations-including byte write, page write, and address setup-when driven high. While write commands are ignored, the device still acknowledges device select and address bytes, allowing bus masters to verify presence without risking memory corruption. This provides deterministic, zero-software-overhead protection against unintended writes during power transitions or firmware faults.

Can the M24C01-WDW6TP operate reliably at 3.3 V and −40 °C?

Yes. The M24C01-WDW6TP is fully specified for operation from 2.5 V to 5.5 V and −40 °C to +85 °C. At 3.3 V and −40 °C, it maintains full I²C timing compliance (400 kHz max clock), retains its 4-million write cycle endurance rating, and delivers guaranteed 200-year data retention per qualification testing. No derating or special initialization sequence is required across this range.

How many unique addresses can be implemented using E0–E2 pins?

The E0, E1, and E2 pins configure the three least-significant bits (b1–b3) of the 7-bit I²C device address (prefix 1010xxx), enabling up to eight unique addresses (000 to 111) on the same bus. Each pin must be hard-wired to VSS or VCC - floating states default to logic 0 - and all combinations are electrically verified in production. This allows daisy-chained configuration storage across multiple subsystems without address conflict.

Does the M24C01-WDW6TP support sequential read across page boundaries?

Yes. During sequential read, the internal address counter automatically increments after each byte and rolls over from address 7Fh back to 00h upon reaching the end of the 128-byte array. This behavior is fully supported in all package variants including TSSOP8 (DW), and requires no special handling in firmware. The roll-over is atomic and deterministic, enabling continuous streaming of stored configuration or log data without address management overhead.