STMicroelectronics

M93C86-WMN6TP

A: The M93C86-WMN6TP is designed for a wide operating voltage range, low power consumption, and high reliability. The table below summarises its core specifications, drawn directly from manufacturer data and multiple distributor sources: Specification Value Memory Density 16 Kbit (2 Kbyte) Memory Organization 2K × 8 or 1K × 16 (configurable) [8†L6][11†L15-L16] Memory Technology EEPROM (Non‑Volatile) Memory Interface MICROWIRE (3‑wire serial) [8†L6][14†L6-L7] Clock Frequency (fCLK) 2 MHz (max) [8†L9][11†L16] Access Time (tAA) 200 ns (max) [10†L11] Write Cycle Time (tWC) 5 ms (max, self‑timed) [6†L24][14†L15] Supply Voltage (VCC) 2.5 V to 5.5 V (wide range) [6†L24][8†L7][11†L17] Active Current (ICC) 2 mA (max) [8†L10] Standby Current Minimal — enhances power efficiency [14†L16] Write Endurance 1,000,000 (1 million) write cycles (minimum) [14†L14][15†L28] Data Retention 40 years (minimum) [14†L14-L15][15†L29] Operating Temperature (Industrial) –40°C to +85°C [6†L25][8†L7][11†L18] Package Type 8‑pin SOIC (4.90 mm × 3.90 mm) [10†L9-L10][11†L16-L17] Moisture Sensitivity Level (MSL) 1 (unlimited) — No special handling required [11†L19][14†L29-L30] RoHS Status RoHS compliant, halogen‑free [14†L10-L11] Additional features include: Dual organization – Can be configured as either 2K × 8 (byte mode) or 1K × 16 (word mode), providing flexibility for different system bus widths [13†L13]. Self‑timed programming cycle – No external timing control required; each write cycle automatically erases the addressed location before writing [13†L14-L15]. READY/BUSY signal – Provides hardware status monitoring during programming [13†L15]. Enhanced ESD/latch‑up behavior – Provides robust immunity to electrostatic discharge events [13†L16].

A: The M93C86-WMN6TP uses a standard MICROWIRE (3‑wire serial) bus for communication [8†L6][9†L3-L4]. The interface consists of the following signals: Pin Signal Group Function S (Chip Select) Enables the device when driven high (active‑high chip select) C (Serial Clock) Provides the clock signal for data transfer (up to 2 MHz) D (Serial Data Input) Transmits data from the host to the device (opcodes, addresses, write data) Q (Serial Data Output) Transmits data from the device to the host (read data) Communication is initiated by driving the Chip Select (S) pin high. The first bit transmitted after S goes high is the Start bit (logic "1") , followed by a 2‑bit Opcode that defines the operation to be performed (READ, WRITE, ERASE, WRAL, ERAL, etc.). After the Opcode, the device expects address and data bits depending on the selected operation. The number of clock cycles required for each instruction is precisely defined – for example, a WRITE instruction in x8 organization expects 20 clock cycles from the start bit to the falling edge of S [8†L31-L33]. Instruction pulse counter: To enhance reliability in noisy environments, the device includes an on‑chip pulse counter that counts clock pulses from the start bit until S goes low [8†L25-L26]. If the number of clock pulses received does not match the expected count for the given instruction, the WRITE, ERASE, ERAL, or WRAL instruction is automatically aborted, and the memory contents remain unchanged [8†L27-L28]. This feature provides robust protection against data corruption caused by clock glitches, spurious pulses, or noise on the serial bus.

A: The M93C86-WMN6TP is engineered for long‑term reliability. Key specifications include: Reliability Parameter Specification Write Endurance 1,000,000 (1 million) write/erase cycles (minimum) [14†L14][15†L28] Data Retention 40 years (minimum) [14†L14-L15][15†L29] Write Cycle Time 5 ms (max, self‑timed) Operating Temperature (Industrial) –40°C to +85°C ESD Protection Enhanced ESD/latch‑up behavior [13†L16] Self‑timed Programming Auto‑erase before write; READY/BUSY signal [13†L14-L15] Moisture Sensitivity Level (MSL) 1 (unlimited) — No special handling required These reliability figures make the device exceptionally well‑suited for applications that require occasional data updates while guaranteeing long‑term data integrity. The device is manufactured with a mature process and benefits from efficient testing coverage on each single production part [15†L10-L12]. Additionally, STMicroelectronics Serial EEPROM products offer a very high quality level with key features including noise immunity, ESD protection, latch‑up immunity, and cycling endurance as basic features independent of the protocol used [15†L27-L29].

A: The M93C86-WMN6TP is well‑suited for embedded applications requiring reliable non‑volatile storage of configuration parameters, calibration constants, and identification data. Typical use cases include: Industrial automation – Configuration storage, system logs, and recalibration data in PLCs, HMIs, sensors, and measurement equipment [14†L28-L31]. Telecommunications equipment – Device configurations and identity information that must remain preserved over extended periods and through varying environmental conditions [14†L32-L34]. Networking equipment – Settings or firmware details stored in routers, switches, and access points [14†L35-L38]. Consumer electronics – User configuration settings, personalised device preferences retained across power cycles [14†L38-L41]. Parameter and code traceability storage – EEPROM devices are particularly suited to the tasks of code traceability and parameter storage [15†L22-L23]. ⚠️ Important Lifecycle Information: The product lifecycle status for the M93C86-WMN6TP is Active / Production. Multiple major distributors confirm the Part Status as Active [6†L21][9†L4][12†L28-L29]. DigiKey lists the Part Status as Active and DigiKey Programmable Verified [6†L21-L22], with a manufacturer standard lead time of 10 weeks [6†L15-L16]. Arrow Electronics lists the part as Active with a manufacturer lead time of 8 weeks and over 4,000 units in stock [9†L9-L10][9†L17]. The product family has been in production for many years (datasheet references date back to 2011) [13†L11], and STMicroelectronics continues to manufacture the device for embedded applications requiring MICROWIRE serial EEPROMs. For new designs requiring a 16‑Kbit MICROWIRE EEPROM, the M93C86-WMN6TP remains an active, suitable choice. Engineers are advised to verify current availability, pricing, and lead times directly with an authorised STMicroelectronics distributor (such as DigiKey, Mouser, Farnell, or Arrow) before committing the part to a new high‑volume design. The device is available in Tape & Reel (T&R) packaging with a standard manufacturer package quantity of 2,500 units per reel [6†L35][9†L8].