The HT93LC46 is a low‑voltage, 1‑Kbit non‑volatile EEPROM that can be organized as 64 × 16‑bit words or 128 × 8‑bit words depending on the ORG pin. It features a 3‑wire serial interface (CS, SK, DI, DO) with automatic erase‑before‑write, write‑protect, and a 10‑year data retention after 100 K rewrite cycles.
The datasheet details electrical characteristics such as operating voltage (2.2 V‑5.5 V), operating current (5 mA max), standby current (10 µA max), and a maximum write cycle time of 5 ms. It also includes pin assignments, timing diagrams for all instructions, package dimensions for DIP, SOP and TSSOP versions, and tape‑and‑reel specifications for automated assembly.
| Operating voltage | 2.2 V ~ 5.5 V |
|---|---|
| Operating current (TTL) | 5 mA max |
| Write cycle time | 5 ms max |
| Data retention | 10 years after 100 K rewrites |
| Memory size | 1024 bits (1 Kbit) |
| User selectable internal organization | 64 × 16 bits or 128 × 8 bits |
| Package types | 8‑pin DIP, SOP, TSSOP |
The device operates from 2.2 V to 5.5 V.
The maximum write cycle time is 5 ms.