ACT ACT4463-2, ACT4463, ACT4453-2, ACT4453 Datasheet

eroflex Circuit T

– Data Bus Modules For The Future © SCD4453 REV A 1/29/98

ACT 4453 / 4463

SINGLE SUPPLY TRANSCEIVERS

FOR MIL-STD-1553/1760

Features

• Single 5 Volt Supply Operation

• Low Power Dissipation

CIRCUIT TECHNOLOGY

www.aeroflex.com/act1.htm

• Small Size & Light Weight

• Dual Transceivers save Space & Cost

• Outstanding MIL-STD-1553 performance

• Processed and screened to Mil-STD-883
specs

• Radiation Hard Dielectric Isolation
Monolithic construction for Severe
Environments

• Superior High Frequency Line Transient and
Input Ripple Rejection

• Input and Output TTL Compatible Design

MIL-PRF-38534 Compliant Devices Available

•

• DESC SMD# 5962-89522

General Description:

The Aeroflex Circuit Technology
ACT4453 / 4463 series are next
generation monolithic transceiver
designs which provides full
compliance with MIL-STD-1553A/B
and 1760 requirements in the
smallest packages with low power
consumption and single power supply
operation.

The ACT4453 / 4463 series
performs the front-end analog
function of inputting and outputting
data through a transformer to the
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.

TX DATA IN
TX DATA IN

TX INHIBIT

+5 V

+5V RTN

RX DATA IN
RX DATA IN

STROBE

DRIVER

INPUT

AMPLIFIER

ACTIVE
FILTER

REFERENCE

ACTIVE
FILTER

OUTPUT
STAGE

COMP.

COMP.

Block Diagram (without Transformer)

echnology

TX DATA OUT

TX DATA OUT

RX DATA OUT

RX DATA OUT

Each channel of the dual
transceiver is completely separate
from the other and fully independent.
This includes power leads as well as
signal lines. Hence, each channel
may be connected to a different data
bus with no interaction.

Transmitter:

The Transmitter section accepts
bi-phase TTL data at the input and
when coupled to the data bus with a
1:2.12 ratio transformer, isolated on
the data bus side with two 52.5 Ohm
fault isolation resistors, and loaded by

Aeroflex Circuit Technology SCD4453 REV A 1/29/98 Plainview NY [phone]

two 70 Ohm terminations, the data
bus signal is typically 7 volts P-P at
A-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
provides for the removal of the
transmitter output from the line. A
logic “1” applied to the “INHIBIT”
takes priority over the condition of
the data inputs and disables the
transmitter. (See Transmitter Logic

for an indefinite period with the bus
(point A-A') short circuited at 100%
duty cycle.

Receiver:

The Receiver section accepts
bi-phase differential data at the input
and produces two TTL signals at the
output. The outputs are DATA and

, and represent positive and

DATA
negative excursions of the input
beyond a pre-determined
threshold.(See Receiver Logic
Waveform. Figure 2.)

Waveform, Figure 1.) The
Transmitter may be safely operated

The pre-set internal thresholds will

Figure 1 — Transmitter Logic Waveforms Idealized*

DATA IN

detect data bus signals exceeding

1.20 Volts P-P and reject signals
less than 0.6 volts P-P when used
with a transformer. (See Figure 5
for transformer data and typical
connection.)

A low level at the Strobe input
inhibits the DATA and DATA
outputs. If unused, a 2K pull-up to
+5 Volts is recommended

DATA IN

INHIBIT

LINE TO LINE

OUTPUT

Note:

DATA and DATA
and must be in the same state during off times (both high or low).

inputs must be complementary waveforms or 50% duty cycle average, with no delays between them,

Figure 2 — Receiver Logic Waveforms Idealized*

LINE TO LINE
INPUT

STROBE

DATA OUT

DATA OUT

* See Figure 8 For Actual Waveforms

2

Note overlap

Aeroflex Circuit Technology SCD4453 REV A 1/29/98 Plainview NY [phone]

Absolute Maximum Ratings

Operating case temperature -55°C to +125°C
Storage case temperature -65°C to +150°C
Power supply voltage -0.3 V to +7.0 V
Logic input voltage -0.3 V to +5.5 V
Receiver differential input ±10 V
Receiver input voltage (common mode) ±5 V
Driver peak output current 600 mA
Total package power dissipation over the full operating

case temperature rise

(Note: Normal operation conditions require one transceiver on and the
other off.)

2 Watts

Maximum junction to case temperature 10°C
Thermal resistance – junction to case 5°C/W

Electrical Characteristics — Driver Section

Input Characteristics, TX DATA in or TX DATA in (Notes 2 & 3 apply)

Parameter Condition Symbol Min Typ Max Unit

"0" Input Current VIN = 0.4 V I
"1" Input Current V

= 2.7 V I

IN

"0" Input Voltage V
"1" Input Voltage V

Inhibit Characteristics

"0" Input Current VIN=0.4V
"1" Input Current

=2.7V I

V

IN

"0" Input Voltage V
"1" Input Voltage V

Delay from TX inhibit, (0→1) to inhibited output t

Delay from TX inhibit, (1→0) to active output t
Differential output noise, inhibit mode

Differential output impedance (inhibited)

Note 1

Output Characteristics

Differential output level

R

L

=35 Ω

I

ILI

DXOFF

DXON

V

Z

V

O

ILD
IHD

ILD
IHD

IHI

ILI

IHI

NOI

OI

-0.2 -0.4

mA

1 40 µA

0.7

2.0 V

-0.2 -0.4

1.0 40

mA

µA

0.7

2.0
250 350

150 250

2 10

nS
nS

mV

2K

6 7.5 9 V

P-P

V

V
V

P-P

Ω

Rise and fall times(10% to 90% of P-P output)

t

r

100 200 300 nS

Output offset at point A-A' on Figure 5, 2.5µS

=35 Ω V

after midpoint crossing of the parity bit of the

R

L

OS

± 90

mV peak

last word of a 660µS message
Delay from 50% point of TX DATA or TX DATA

input to zero crossing of differential signal

t

DTX

120 250

Note 1. Power on or off, measured from 75KHz to 1MHz at point A-A' and transformer self impedance of 3KΩ

minimum

3

nS