HT6547C Datasheet PDF - Holtek Semiconductor

General Description
The HT6547C is a keyboard encoder especially designed for IBM PC/XT, IBM PC/AT, IBM PS/2 and all compatible machines.
The HT6547C accepts keyboard inputs and contains a 16-character first-in-first-out buffer where data is stored. An inexpensive LC oscillator can be used for the system clock. It is easy implement in high performance and low cost keyboards.