W83C45

The W83C45 is an 80C42 based keyboard and mouse controller. It is designed to provide the functions needed to interface a CPU to a keyboard or to a PS/2 mouse, and can be used with IBM-compatible personal computers or PS/2-based systems. It is available in 40-pin DIP package.

Here are some features about W83C45: (1)supports keyboards of AT mode and PS/2 mode; (2) automatically detects PS/2 mode or AT mode; (3)supports PS/2 mouse; (4)built in 2 KB programmable ROM, 256 byte data RAM; (5)programmable ROM code licensed from Phoenix MultiKey/42; (6)operating frequency from 6 MHz to 12 MHz; (7)enhanced ESD protection.

What comes next is about W83C45 absolute maximum ratings: (1)ambient operating temperature: 0 to 85 ; (2)storage temperature: -65 to 150 ; (3)supply voltage to ground potential: -0.3 V to 7.0 V; (4)applied input/output voltage: -0.3 V to 7.0 V; (5)power dissipation: 30 mW. Then is the electrical characteristics(TA=0 to 70 , VDD=5 V ±5%): (1)power supply: 4.75 V min, 5.0 V typ and 5.25 V max; (2)input low voltage: 0.8 V min; (3)input high voltage: 3.5 V max; (4)O/P leakage current: 10 A; (5)O/P load capacity: 15 pF min and 50 pF max.