© 2000 Calirornia Micro Devices Corp. All rights reserved.

4/00

215 Topaz Street, Milpitas, California 95035

Tel: (408) 263-3214

Fax: (408) 263-7846

www.calmicro.com

1

CALIFORNIA MICRO DEVICES

PAC1284

P/ACTIVE™ IEEE 1284 ECP/EPP TERMINATION NETWORK

Features

• Stable resistor-capacitor network

• 9 terminating lines/package

• Saves board space, reduces assembly cost,

simplifies routing

• ESD protected

• Miniature QSOP package

SCHEMATIC CONFIGURATION

Applications

• ECP/EPP Parallel Port termination

• EMI/RFI filter

• Notebook and Desktop computers

• Engineering Workstations and Servers

*Guaranteed by design.

Note 1: Pins 1, 2, 12, 13, 24, and 23 grounded.

Pins 3 through 11 open, ESD contact discharge,

between ground and pins 14 through 22, one

at a time.

Product Description

Note: CAMD’s P/Active™ 1284 Parallel Port Termination Network is an upgraded version of the original PRC1284 or IPEC1284 which

provides ESD protection, minimized lead inductance and parasitic capacitive effects, and improved crosstalk and filter performance

characteristics at high data transmission rates. The PAC1284 is recommended for all new designs.

Advanced, enhanced 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, video capture, and other PC peripherals. These advanced ports also support bi-directional transfers to 2MB/sec. To

effectively support these higher transfer 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 strict filtering on the parallel port. CAMD’s P/Active 1284 Parallel Port Termination Network

addresses all of these requirements by providing a nine line, IEEE 1284 compliant network, in a thin film integrated circuit. Two

of these devices replace up to 54 discrete components and provide a complete parallel port termination solution for space-

critical applications.

CAMD’s P/Active technology provides high reliability and low cost through manufacturing efficiency. The P/Active 1284 includes

pull-up, series termination, an EMI filter capacitor, and ESD protection for the capacitors. The resistors and capacitors are fabricated

as today’s microprocessor products. The device is protected from ESD discharges to over 4,000 volts.

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