ACT4487-I View Datasheet(PDF) - Aeroflex Corporation

Part Name

Description

Manufacturer

ACT4487-I

SINGLE TRANSCEIVER FOR MIL-STD-1553/1760

Aeroflex Corporation 

ACT 4487 SINGLE TRANSCEIVER

FOR MIL-STD-1553/1760

Features

CIRCUIT TECHNOLOGY

www.aeroflex.com/act1.htm

• +5 / ±15 Volt Supply Operation

• Low Power Dissipation

• Small Size & Light Weight

• Outstanding MIL-STD-1553 performance

• Radiation Hard Dielectric Isolation Monolithic

Construction for Severe Environments

• Superior High Frequency Line Transient and

Input Ripple Rejection

• Input and Output TTL Compatible Design

• Processed and Screened to MIL-STD-883 Specs

• MIL-PRF-38534 Compliant Devices Available

TX DATA IN

TX DATA IN

TX INHIBIT IN

+5V (VL)

+15V (VCC)

-15V (VEE)

GND1

GND2

GND3

RX DATA IN

RX DATA IN

CASE

RX STROBE IN

DRIVER

INPUT

AMPLIFIER

ACTIVE

FILTER

REFERENCE

ACTIVE

FILTER

OUTPUT

STAGE

TX DATA OUT

TX DATA OUT

COMP.

RX DATA OUT

COMP.

RX DATA OUT

Block Diagram (Without Transformer)

General Description

The

Aeroflex

Circuit

Technology ACT 4487 is a next

generation monolithic transceiver

design which provide full

compliance to MIL-STD-1553A/B

and 1760 requirements in a small

package with low power

consumption.

The ACT 4487 series performs

the front-end analog function of

inputting and outputting data

through a transformer to the

MIL-STD-1553 data bus.

Design of this transceiver reflects

particular attention to active filter

performance. This results in low bit

and word error rate with superior

waveform purity and minimal zero

crossover distortion. Efficient

transmitter electrical and thermal

design provides low internal power

dissipation and heat rise at high as

well as low duty cycles.

Transmitter:

The Transmitter section accepts

bi-phase TTL data at the input and

when coupled to the data bus with a

1.4:1 ratio transformer, isolated on

the data bus side with two 52.5

Ohm fault isolation resistors, and

loaded by two 70 Ohm

terminations, the data bus signal is

typically 7.5 Volts P-P at point A

(See Figure 5). When both DATA

and DATA inputs are held low or

high, the transmitter output

becomes a high impedance and is

“removed” from the line. In addition,

an overriding “INHIBIT" input

eroflex Circuit Technology – Data Bus Modules For The Future © SCD4487 REV B 1/29/98

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