5962-8864401UX Ver la hoja de datos (PDF) - Aeroflex UTMC

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5962-8864401UX

MIL-STD-1553A/B Bus Transceiver

Aeroflex UTMC 

DATA BUS INTERFACE 1

The designer can connect the UT63M14x to the data bus via a

short-stub (direct-coupling) connection or a long-stub

(transformer-coupling) connection. Use a short-stub connection

when the distance from the isolation transformer to the data bus

does not exceed a one-foot maximum. Use a long-stub

connection when the distance from the isolation transformer

exceeds the one-foot maximum and is less than twenty feet.

Figure 5 shows various examples of bus coupling

configurations. The UT63M14x series transceivers are designed

to function with MIL-STD-1553A and 1553B compatible

transformers.

Note:

1. The 24-lead flatpack internally connects TXOUT to RXIN and TXOUT to

RXIN for each channel.

RECOMMENDED THERMAL PROTECTION

All packages should mount to or contact a heat removal rail

located in the printed circuit board. To insure proper heat transfer

between the package and the heat removal rail, use a thermally-

conductive material between the package and the heat removal

rail. Use a material such as Mereco XLN-589 or equivalent to

insure heat transfer between the package and heat removal rail.

SHORT-STUB

1:2.5

DIRECT COUPLING

1 FT. MAX.

55 OHMS

ZO

+5V DC OPERATION

55 OHMS

TXOUT

RXIN

TXOUT

RXIN

1:1.79 20 FT MAX 1:1.4

LONG-STUB

TRANSFORMER COUPLING

.75 ZO

.75 ZO

Figure 8. Transceiver Test Circuit MIL-STD-1553B

Note:

ZO defined per MIL-STD-1553B, Section 4.5.1.5.2.1.

ZO

Figure 5. Bus Coupling Configuration

6

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