ACT4808 View Datasheet(PDF) - Aeroflex Corporation

Part Name

Description

MFG CO.

ACT4808

Dual Transceivers for MACAIR A3818, A5690, A5232, A4905 & MIL-STD-1553

Aeroflex Corporation 

ACT4808 Dual Transceivers for

MACAIR A3818, A5690, A5232, A4905

& MIL-STD-1553

Features

• ACT4808 Dual Transceiver meets

MIL-STD-1553A & B, Macair A3818, A5690, A5232

and A4905 specs

• New Low Power Model –L Available

• Operates with ±12V to ±15V & +5V Power Supplies

• Voltage source output for higher bus drive power

• Plug-in or Flat Package

• Monolithic construction using linear ASICs

• Processed and Screened to MIL-STD-883 specs

ACT4808 Transceiver

TX DATA IN

TX DATA IN

TX INHIBIT

DRIVER

SHAPING

OUTPUT

STAGE

V+

TX DATA OUT

TX DATA OUT

COMP.

RX DATA OUT

+5 V

VEE

RX DATA IN

RX DATA IN

VCC

STROBE

INPUT

AMP

V-

ACTIVE

FILTER

COMP.

RX DATA OUT

Block Diagram (without Transformer), 1/2 of unit shown

CIRCUIT TECHNOLOGY

www.aeroflex.com/act1.htm

General Description:

The Aeroflex Laboratories transceiver

model ACT4808 is a new generation

Dual monolithic transceiver which

provides full compliance with Macair

and MIL-STD-1553 data bus

requirements

The model ACT4808 performs the

front-end analog function of inputting

and outputting data through a

transformer to a MIL-STD-1553 or

Macair data bus. The ACT4808 can

be considered a "Universal"

Transceiver in that it is compatible

with MIL-STD-1553A & B, Macair

A-3818, A-4905, A-5232 and A-5690.

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. The ACT4808

series active filter design has

additional high frequency roll-off to

provide the required Macair low

harmonic distortion waveform without

increasing the pulse delay

characteristics significantly.

Efficient transmitter electrical and

thermal design provides low internal

power dissipation and heat rise at

high and well as low duty cycles.The

receiver input threshold is set

Internally.

Transmitter

The Transmitter section accepts

bi-phase TTL data at the input and

when coupled to the data bus as per

Figure 3 or 4 and by two 70 Ohm

terminations (ZO), the data bus signal

produced is 6.5 Volts minimum P-P at

A-A’. When both DATA and DATA

eroflex Circuit Technology – Data Bus Modules For The Future © SCD4808 REV E 12/9/99

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