HT6547C

The HT6547C is designed as keyboard encoder specially for IBM PC/XT, IBM PC/AT, IBM PS/s and all compatible machines. It accepts keyboard in puts and provides 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 to implement in high performance and low cost keyboards.

HT6547C has ten features. (1)Supports 3 windows keys. (2)Supports code set 1, for PC/XT keyboard. (3)Supports code set 1, for PS/2 model 30 keyboard. (4)Supports code set 2, for PC/AT, PS/2 model 50, 60 keyboards. (5)Supports code set, for PS/2 model 80 keyboard. (6)LC or crystal oscillator. (7)Minimal external components. (8)Phantom key detection. (9)101-key or 102-key application. (10)40 pin dual-in-line package. That are all the main features.

Some HT6547C absolute maximum ratings have been concluded as follow. (1)Its supply voltage would be from 4.75V to 5.25V. (2)Its input voltage would be from Vss-0.3V to Vdd+0.3V. (3)Its operating temperature range would be from 0°C to 70°C. (4)Its storage temperature range would be from -55°C to 125°C.

Also some electrical characteristics of HT6547C are concluded as follow. (1)Its operating voltage would be min 4.75V and typ 5.0V and max 5.25V. (2)Its operating current would be typ 1.0mA and max 2.2mA. (3)Its input low voltage (SI0 to SI7) would be min 0V and max 1.5V. (4)Its input low voltage (DATA, CLOCK, SWI) would be min 0V and max 1.2V. (5)Its input high voltage would be min 4V and max Vdd. (6)Its output high voltage SWI would be min 4.5V. (7)Its output low voltage would be max 0.5V. (8)Its internal pull high resistance (SI0 to SI7) would be min 7k and typ 10k and max 20k. (9)Its internal pull high resistance (CLOCK, DATA) would be min 6k and typ 8k and max 15k. (10)Its system clock would be typ 2.0MHz. And so on. If you have any question or suggestion or want to know more information please contact us for details. Thank you!