Pin number(s)

1, 28 . . . . . . . .

The positive supply for the line interface module. Connect to +5.0V for PECL applications,

and to Gnd for ECL applications.

2, 3

. . . . . . . .

–2.0V. Recommend 330 ohms to Gnd.

7, 8

. . . . . . . .

raised ECL (PECL) applications, and to –5.2V for standard ECL applications.

13, 14 . . . . . . . .

Gnd should be AC coupled to DC signal Gnd using a 0.027 µF capacitor, ~500V.

15, 16 . . . . . . . .

should be AC coupled to DC signal Gnd using a 0.027 µF capacitor, 500V.

21, 22 . . . . . . . .

raised ECL (PECL) applications, and to –5.2V for standard ECL applications.

23

. . . . . . . .

This pin can only source 1 mA maximum.

24, 25 . . . . . . . .

4, 5, 6, 9, 10, 11, 12, 17,

18, 19, 20, 26, 27 . .These pins are "no connect;" do not apply Gnd, VCC, or signal lines to these pins.

Module Pinouts

Board Layout Considerations

0.1 µF capacitors should be ceramic and placed as close

Differential lines should be of equal length.

Data out and signal detect output lines should be as short

as possible and isolated from noisy sources.

must be used in order to control return loss.

A DC signal ground plane should occupy the complete

area directly beneath the transceiver LIM from pins 1-2

and 17-28.

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Fibre Channel Module — 7

The earth ground plane should occupy the complete area

directly beneath pins 13-14 and 15-16.

There should be a separation of 0.050" between earth

and DC ground.

The earth ground should be AC coupled to DC ground

with a 0.027 µF capacitor on both sides of the