STMicroelectronics M24C01-RDW6TP

Overview

M24C01-RDW6TP from STMicroelectronics is a 1-Kbit (128-byte) I²C-compatible serial EEPROM organized as 128 × 8 bits, operating as a slave device on standard and fast-mode I²C buses up to 400 kHz. It supports 1.8 V to 5.5 V supply voltage, features hardware write protection via WC pin, delivers ≤5 ms byte/page write time, and guarantees >4 million write cycles with >200-year data retention at 55 °C - deployed in industrial sensor calibration storage and embedded system configuration memory.

For engineers reviewing the M24C01-RDW6TP datasheet, M24C01-RDW6TP pinout, M24C01-RDW6TP application, or M24C01-RDW6TP equivalent, key selection criteria include its 1.8 V minimum VCC support, TSSOP8 (DW) 169-mil package with E0–E2 address pins, WC-controlled full-array write lock, and compatibility with I²C bus arbitration in multi-slave systems.

Technical Context

The M24C01-RDW6TP implements a synchronous I²C slave interface with start/stop detection, ACK/NACK handshaking, and internal address counter auto-increment. Its memory array uses floating-gate EEPROM technology with on-chip charge pump for write operations, enabling reliable nonvolatile storage without external high-voltage programming.

It integrates a power-on-reset (POR) circuit that prevents spurious writes during power ramp-up, and supports three read modes - random, current-address, and sequential - with SDA open-drain output requiring external pull-up. The WC pin provides hardware-level write inhibition independent of I²C command flow.

Key Specifications

Pinout & Package

Package: TSSOP8 (DW), 169-mil width, RoHS-compliant ECOPACK2, surface-mount.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT24C01D-SSHM-T and M95010-WMN6TP, the M24C01-RDW6TP uniquely combines 1.8 V operation, integrated WC pin for hardware write lock, and TSSOP8 footprint - making it optimal for space-constrained, low-voltage I²C systems where data integrity during power transitions is critical.

Availability

M24C01-RDW6TP is available at Aetrix Electronics and suitable for industrial sensor calibration, embedded system configuration, and automotive body control applications requiring stable component supply, long-term obsolescence management, and RoHS-compliant packaging.

Supply support for M24C01-RDW6TP 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 industrial, automotive, and consumer markets.

The M24Cxx series targets cost-sensitive, space-constrained embedded systems requiring reliable, low-voltage serial EEPROM with hardware write protection - optimized for factory programming, field calibration, and long-life data logging.

FAQ

What is the function of the WC pin on M24C01-RDW6TP?

The WC (Write Control) pin is an active-high hardware enable for write operations. When driven high, it disables all write access to the entire memory array - including byte and page writes - regardless of I²C commands received. This prevents accidental overwrites during power-up, brown-out, or firmware glitches. When left floating or pulled low, writes are permitted.

Can M24C01-RDW6TP operate at 1.8 V while maintaining full 400 kHz I²C speed?

Yes. The M24C01-RDW6TP is rated for 1.8 V to 5.5 V operation and supports full 400 kHz Fast-mode I²C timing across this entire voltage range, as confirmed in Table 6 of DS9398 Rev 8. No derating of clock frequency is required at minimum VCC, unlike some competing EEPROMs.

How does the device handle I²C address conflicts when multiple M24C01-RDW6TP units share one bus?

Each unit uses E2, E1, and E0 pins to set the three LSBs of its 7-bit I²C slave address (base 1010xxx). By tying these pins to VCC or VSS in unique combinations, up to eight devices can coexist on the same bus. The TSSOP8 package exposes all three pins; the DFN5 variant fixes them internally to 000, limiting bus count unless other variants are mixed.

Is the M24C01-RDW6TP pin-compatible with earlier M24C01-W or M24C01-F variants?

No. While electrically and functionally compatible, M24C01-RDW6TP uses the TSSOP8 (DW) package with 169-mil width, whereas M24C01-W typically uses SO8N (150-mil) and M24C02-F uses UFDFPN5. Pin numbering and thermal pad layout differ - mechanical redesign is required for direct replacement, though firmware and schematic logic remain identical.