STMicroelectronics M24C08-RDW6TP

Overview

M24C08-RDW6TP from STMicroelectronics is an 8-Kbit I²C-compatible EEPROM organized as 1 K × 8 bits, designed for nonvolatile data storage in embedded control and configuration systems. It operates from 1.8 V to 5.5 V, supports 400 kHz I²C bus speed, features 16-byte page write capability with ≤5 ms write time, and guarantees >4 million write cycles and >200-year data retention at 55 °C. It is used in industrial sensor calibration, IoT device parameter storage, and power-management firmware backup.

For engineers reviewing the M24C08-RDW6TP datasheet, M24C08-RDW6TP pinout, M24C08-RDW6TP application, or M24C08-RDW6TP equivalent, key selection criteria include supply voltage range (1.8–5.5 V), I²C clock compatibility (100/400 kHz), page size (16 bytes), write protection via WC pin, and package-specific pin mapping (TSSOP8 with E2/WC present).

Technical Context

The M24C08-RDW6TP implements a standard I²C slave protocol with start/stop detection, ACK/NACK handshaking, and address decoding per device select code (1010b + E2 + A9/A8 + R/W). Its internal architecture includes a page latch, X/Y decoders, sense amplifiers, and HV generator for EEPROM programming - enabling byte and page writes without external high-voltage supply.

It integrates on-chip power-on reset (POR) to prevent spurious writes during power ramp-up, and supports three read modes: random, current-address, and sequential - all independent of WC state. The WC pin disables writes globally when driven high; E2 sets bit b3 of the 7-bit device address, enabling up to two devices on the same bus in SO8N/TSSOP8 packages.

Key Specifications

Pinout & Package

Package: TSSOP8 (DW), 169 mil width, RoHS-compliant and halogen-free (ECOPACK2). Pin 1 marked by notch or dot; pin numbering follows standard counter-clockwise convention from top view.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar I²C EEPROM applications.

Compared with AT24C08D-SSHM-T and BR24G08NUX-5TR, the M24C08-RDW6TP delivers superior write endurance (4M vs. 1M cycles), guaranteed hardware write protection (WC pin), and longer data retention (200 vs. 100 years), making it optimal for industrial and automotive applications demanding long-term reliability.

Availability

M24C08-RDW6TP is available at Aetrix Electronics and suitable for industrial sensor calibration, IoT device configuration storage, and automotive body control module settings requiring stable component supply across multi-year production programs.

Supply support for M24C08-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, specializing in microcontrollers, power management ICs, sensors, and memory solutions for industrial, automotive, and consumer markets.

The M24Cxx series targets cost-effective, high-reliability nonvolatile storage in space- and power-constrained embedded systems - emphasizing robust I²C interoperability, extended temperature operation, and long-term data integrity.

FAQ

Does M24C08-RDW6TP support 100 kHz and 400 kHz I²C bus speeds?

Yes, the M24C08-RDW6TP is fully compatible with both standard-mode (100 kHz) and fast-mode (400 kHz) I²C bus operation. Its AC parameters are characterized across this full range, and the SCL input rise/fall time specification (≤50 ns) ensures reliable timing compliance at 400 kHz with proper bus capacitance (≤100 pF) and pull-up strength.

What is the function of the E2 pin, and can it be left unconnected?

The E2 pin sets bit b3 of the 7-bit I²C device address (1010b + E2 + A9/A8 + R/W), allowing two devices to share the same bus. In TSSOP8 and SO8N packages, E2 must be tied to VCC or VSS for deterministic addressing; if left floating, it reads as logic low (0), fixing the address to 10100xxx. It is not connected in UFDFPN5 and WLCSP variants.

How does the WC pin affect I²C communication behavior?

When WC is driven high, the device acknowledges device select and address bytes but returns NACK for all subsequent data bytes - blocking write execution while maintaining bus visibility. Reads remain fully functional regardless of WC state. This enables safe debugging or field service modes where configuration must be preserved during firmware updates.

Is decoupling capacitance required on the VCC pin, and what value is recommended?

Yes, a ceramic decoupling capacitor (10 nF to 100 nF) is mandatory between VCC and VSS, placed as close as possible to the package pins. This suppresses high-frequency noise generated during internal EEPROM write cycles and ensures stable operation during I²C clock edges - omission risks data corruption or intermittent communication failure.