W83C42

The W83C42 keyboard controller is programmed to support the IBM compatible personal computer keyboard serial interface. It enables popular programs such as AutoCAD, Microsoft Windoes 3.1, NOVELL, and other programs to run much faster. Also, it is available in 40-pin DIP package.

Here are some features about W83C42: (1)supports IBM PC/AT 386DX/SX and 486DX/SX system designs; (2)runs much faster than traditional keyboard controllers; (3)host interface compatible wih traditional keyboard controller; (4)communicates with keyboard directly; (5)high-reliablility CMOS technology.

What comes next is about W83C42 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: 50 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)high level voltage for TTL min.I/P: 2.0 V min and VDD max; (3)low level voltage for TTL max.I/P: -0.3 V min and 0.8 V max; (4)I/P leakage current: -10 A min and 10 A max; (5)O/P sink current: 4 mA min; (6)O/P load capacity: 15 pF min and 50 pF max.