W83877Af

The W83877Af is an enhanced version from Winbond's most popular I/O chip W83877F. It integrates the disk drive adapter, serial port(UART), IrDA 1.0 SIR, parallel port, IDE interface, configurable plug-and-play registers for the whole chip. It is available in 100-pin QFP package.

Here are some features about W83877Af: (1)programmable configuration settings; (2)immediate or automatic power-down mode for power management; (3)all hardware power-on settings have internal pull-up or pull-down resistors as default value; (4)support 8 IRQs, 4 DMA channels, 480 re-locatable addresses; (5)compatible with IBM PC AT disk systems; (6)variable write pre-compensation with track select-able capability.

What comes next is about W83877Af absolute maximum ratings: (1)operating temperature: 0 to 70 ; (2)storage temperature: -55 to 150 ; (3)power supply voltage: -0.5 V to 7.0 V; (4)input voltage: -0.5 V to VDD+0.5 V. Then is the DC 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.