M93S66, M93S56, M93S46 4Kbit, 2Kbit and 1Kbit (16-bit wide) MICROWIRE Serial Access EEPROM with Block Protection features industry standard MICROWIRE Bus, single supply voltage, single organization, programming instructions, self-timed programming cycle with auto-erase, user defined write protected area, page write mode, ready/busy signal during programming, speed, sequential read operation, enhanced ESD/Latch-Up Behavior, more than 1 million erase/write cycles, more than 40 year data retention.
The M93S66, M93S56 and M93S46 are 16‑bit wide MICROWIRE serial EEPROMs offering 4 Kbit, 2 Kbit and 1 Kbit capacities. They support single‑supply operation, self‑timed programming, page‑write mode, and user‑defined write‑protected areas. Features include power‑on data protection, enhanced ESD/latch‑up behavior, and long‑term data retention.
The devices are offered in PDIP8, SO8 narrow and TSSOP8 packages with detailed pin‑outs and mechanical dimensions. Electrical specifications cover supply voltage ranges, maximum clock rates, write times, endurance, and absolute maximum ratings. The instruction set provides read, write, page‑write, write‑all and protection commands, with timing diagrams and busy/ready signaling.
| Supply Voltage | 4.5‑5.5 V (M93Sx6), 2.5‑5.5 V (M93Sx6‑W), 1.8‑5.5 V (M93Sx6‑R) |
|---|---|
| Maximum Clock Rate / Write Time | 1 MHz, 10 ms write; 2 MHz, 5 ms write |
| Maximum Clock Rate / Write Time | 2 MHz, 5 ms write |
| Erase/Write Cycle Endurance | ≥ 1 Million cycles |
| Data Retention | ≥ 40 years |
The M93S66 operates from 4.5 V to 5.5 V.
At 2 MHz the write time is 5 ms.
The device can endure more than one million erase/write cycles.