The HA16662MP and HA16682MP are monolithic ICs designed for ST‑506 interface logic in hard‑disk‑drive memory systems. They integrate RS‑422 receiver/driver pairs, line drivers, hysteresis input thresholds, and write‑inhibit functions, allowing direct connection to microprocessors such as 6301V, 6301X, 6305V, and 8049.
The document lists absolute maximum ratings, supply voltage ranges, input and output voltage levels, current limits, and temperature operating ranges. It also includes a block diagram, pin‑by‑pin electrical characteristics, and an application example showing typical usage in a hard‑disk controller.
| Supply voltage range | 45 V – 55 V |
|---|---|
| Operating temperature range | 0 °C to +70 °C |
| Maximum output current (channel 1) | 50 mA |
| High level input threshold (HEADSELO) | 17 V |
The device operates with a supply voltage between 45 V and 55 V.
It can operate from 0 °C up to +70 °C.
It can be directly connected to MPU types 6301V, 6301X, 6305V, 8049, etc.
It provides RS‑422 receiver and driver functionality (MP‑44) for the ST‑506 interface.