Advanced, high-speed parallel ports, conforming to the IEEE 1284 standard, are used to provide communications with external devices such as tape back-up drives, ZIP drives, printers, parallel port SCSI adapters, external LAN adapters, scanners, and other PC peripherals. These advanced ports support bi-directional transfers to 2MB/sec and above. To support these data rates, the IEEE 1284 standard recommends a combined termination, pull-up filter network between the driver/receiver and the cable at both ends of the parallel port interface. In addition, government EMC compatibility requirements impose the need to include a filter on the parallel port.
The PRC1284 addresses all of these requirements by providing a nine line, IEEE 1284 compliant network in a thin film integrated circuit. Two of these networks replace 54 discrete components and provide a complete parallel port termination.
CAMD's PRC1284 Parallel Port Termination Network is a convenient single function which includes pull-up, series termination, and an EMI filter capacitor. The resistors and capacitors are fabricated using proprietary state-ofthe- art thin film technology.
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