This document introduces the M93S66, M93S56, and M93S46 models of MICROWIRE serial access EEPROM with block protection. They use the industry standard MICROWIRE bus and have a single organization structure and programming instructions that work on words or the entire memory. In addition, they support features such as user-defined write protected area, page write mode, self-timed programming cycle with auto-erase, and more.
The M93S66, M93S56 and M93S46 are 4 Kbit, 2 Kbit and 1 Kbit 16‑bit wide MICROWIRE serial access EEPROMs offering industry‑standard bus operation, single‑supply voltage options, and block protection features. They support self‑timed programming, page‑write mode, and provide a ready/busy signal during write cycles.
The datasheet details instruction sets, timing diagrams, electrical characteristics, package dimensions (PDIP8, SO8, TSSOP8), part numbering, and revision history. It also includes absolute maximum ratings, DC/AC parameters, and ordering information for automotive‑grade and industrial‑grade devices.
| Supply Voltage (M93Sx6) | 4.5 V to 5.5 V |
|---|---|
| Supply Voltage (M93Sx6‑W) | 2.5 V to 5.5 V |
| Supply Voltage (M93Sx6‑R) | 1.8 V to 5.5 V |
| Maximum Clock Rate (current product) | 1 MHz |
| Maximum Clock Rate (new product) | 2 MHz |
| Write Time (new product) | 5 ms |
| Erase/Write Cycle Endurance | > 1 Million cycles |
| Data Retention | > 40 years |
The M93S66 operates from 4.5 V to 5.5 V.
Newer versions support a 2 MHz clock rate with a 5 ms write time.
The device can endure more than one million erase/write cycles.
Data can be retained for more than 40 years.