1575PCI 데이터 시트보기 (PDF) - Holt Integrated Circuits

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1575PCI

3.3V Dual Transceivers with Integrated Encoder / Decoders

Holt Integrated Circuits 

HI-1575

HI -1575 TRANSMITTER

BUSA/B

1:2.5

Point

“AT” 1:1.4

52.5 W

(.75 Zo)

35 W (.5 Zo)

BUSA/B

Isolation

Transformer

Coupling

Transformer

52.5 W

(.75 Zo)

52.5 W

(.75 Zo)

1.4:1

Point

“AT” 2.5:1

HI-1575 RECEIVER

35 W (.5 Zo)

52.5 W

(.75 Zo)

Coupling

Transformer

Isolation

Transformer

FIGURE 13. TRANSFORMER COUPLED TEST CIRCUITS

HEAT SINKING THE LEADLESS PLASTIC

CHIP CARRIER PACKAGE

The HI-1575PCI/T is packaged in a 40 pin leadless plastic

chip carrier (LPCC). This package has a metal heat sink

pad on its bottom surface, which should be soldered to

the printed circuit board for optimum thermal dissipation.

The package heat sink is electrically isolated and may be

soldered to any convenient power plane or ground plane.

Redundant "vias" between the exposed board surface

and buried power or ground plane will enhance thermal

conductivity.

APPLICATIONS NOTE

Holt Applications Note AN-500 provides circuit design

notes regarding the use of Holt MIL-STD-1553 data

communications devices. Layout considerations, as well

as recommended interface and protection components

are included.

HOLT INTEGRATED CIRCUITS

10

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