CIRCUIT TECHNOLOGY

www.aeroflex.com

eroflex Circuit T

Features

• World’s smallest and lowest standby power dual variable

amplitude transceiver 0.3" x 1.2" packages

• Lowest standby power

• Dual transceiver meets military data bus requirements,

MIL-STD-1553

• Low power dissipation at full output power

• Single +5V power supply

• Current source output

• Monolithic construction using Dielectrically Isolated (D.I.)

• Processed and screened to MIL-STD-883 specs

• Radiation Hard to 300 KRADS total dose

• DESC SMD pending

• +5V Control line

General Description

The Aeroflex Circuit Technology

model

ACT4419D

is

a

next

generation

D.I.

monolithic

transceiver

which

provides

variable

amplitude

in

full

compliance with MIL-STD-1553

data bus requirements with the

lowest

standby

power

consumption available and one

power supply operation.

The

dual

channel

model

ACT4419D performs the front-end

analog function of inputting and

outputting

data

through

a

transformer to a MIL-STD-1553

data bus.

Design

of

these

transceivers

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.

Variable amplitude is adjusted

with factory preset 0 – 5 Vdc

control line at 1 mA maximum

input current at 5 Volts.

Transmitter

The Transmitter section accepts

bi-phase TTL data at the input

and when coupled to the data bus

with a primary grounded center

tap 1:2.5 transformer, isolated

on the data bus side with two 52.5

Ohm fault isolation resistors, and

loaded

by

two

70

Ohm

terminations

plus

additional

Block Diagram (without Transformer, Channel A shown)

SHAPING

OUTPUT

STAGE

COMP.

COMP.

REFERENCE

ACTIVE

FILTER

DRIVER

TX DATA IN

TX DATA IN

TX INHIBIT

+5 V

STROBE

TX/RX

TX/RX

RX DATA OUT

RX DATA OUT

GROUND

Channel B

INPUT

AMP

Channel A

Channel B

for MIL-STD-1553

Dual Variable Amplitude Transceivers

ACT4419D Dual Transceivers

ACT4419D