STMicroelectronics M24512-WDW6TP

Overview

M24512-WDW6TP from STMicroelectronics is a 512-Kbit (64 Kbyte) I²C-compatible serial EEPROM organized as 64 K × 8 bits, operating from 2.5 V to 5.5 V with 1 MHz clock support. It features 128-byte page write capability, >4 million write cycles, and 200-year data retention. Used for firmware parameter storage in industrial controllers where nonvolatile configuration persistence is required.

For engineers reviewing the M24512-WDW6TP datasheet, M24512-WDW6TP pinout, M24512-WDW6TP application, or M24512-WDW6TP equivalent, key selection criteria include supply voltage range (2.5–5.5 V), TSSOP8 ECOPACK2® package compatibility, I²C bus mode support (100 kHz/400 kHz/1 MHz), and hardware write protection via WC pin.

Technical Context

The M24512-WDW6TP implements a standard I²C slave interface with start/stop detection, ACK/NACK handshaking, and address decoding using E0–E2 chip-enable inputs. Its internal architecture includes an ECC engine correcting single-bit errors per 4-byte group and a high-voltage generator enabling byte/page writes without external programming voltage.

It supports three I²C addressing modes: memory array access (device ID 1010b), identification page access (1011b), and lock-status query. The WC pin provides hardware-level write inhibition across the full 64 Kbyte array, independent of software commands or I²C state.

Key Specifications

Pinout & Package

TSSOP8 (DW) package, 169 mil width, ECOPACK2®-compliant, surface-mount with gull-wing leads.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT24C512-SSHL-T, M24512-WDW6TP offers superior hardware-based write security; compared with BR24T512FJ-WE2, it trades extended temperature rating for tighter supply voltage tolerance (2.5 V min vs. 1.7 V) and ST's established industrial qualification pedigree.

Availability

M24512-WDW6TP is available at Aetrix Electronics and suitable for industrial PLCs, smart meters, medical diagnostics, and automotive body control modules requiring stable component supply across multi-year production cycles.

Supply support for M24512-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, specializing in microcontrollers, power management, and nonvolatile memory for industrial, automotive, and consumer markets.

The M24512 series belongs to ST's serial EEPROM product line, designed specifically for robust, low-pin-count parameter storage in space-constrained embedded systems with stringent reliability and longevity requirements.

FAQ

Does M24512-WDW6TP support 1 MHz I²C operation across its full voltage range?

Yes. The device guarantees 1 MHz I²C clock operation from 2.5 V to 5.5 V, as specified in DS6520 Rev 31 Section 8 AC characteristics. At 2.5 V, tBUF (bus free time) and tHD:STA (hold time after start) meet I²C Fast-mode Plus timing requirements, enabling high-throughput parameter updates without clock stretching.

Can the WC pin be used to protect only a portion of the memory array?

No. The WC pin disables write operations to the entire 64 Kbyte memory array - there is no sector- or page-level hardware protection. Partial protection requires software-managed lock bits or external logic; the WC function is all-or-nothing at the physical layer.

What is the minimum pulse width required for the SCL clock signal?

The minimum SCL high and low periods are both 60 ns at 1 MHz operation (DS6520 Rev 31 Table 10). This corresponds to a 50% duty cycle requirement; deviations exceeding ±10% may cause ACK/NACK misalignment or address decode failures in marginal timing conditions.

Is the TSSOP8 package of M24512-WDW6TP compatible with standard SO8 PCB footprints?

No. The TSSOP8 (DW) package has 169 mil width and 0.65 mm lead pitch, while standard SO8 (MN) is 150 mil wide with 1.27 mm pitch. Mechanical interference and solder bridging will occur if placed on an SO8 footprint; dedicated TSSOP8 land pattern per IPC-7351B is required.