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ACT4455 PDF даташит

Спецификация ACT4455 изготовлена ​​​​«Aeroflex Circuit Technology» и имеет функцию, называемую «ACT 4455 / 4459 SINGLE SUPPLY TRANSCEIVERS FOR MIL-STD-1553/1760».

Детали детали

Номер произв ACT4455
Описание ACT 4455 / 4459 SINGLE SUPPLY TRANSCEIVERS FOR MIL-STD-1553/1760
Производители Aeroflex Circuit Technology
логотип Aeroflex Circuit Technology логотип 

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ACT4455 Даташит, Описание, Даташиты
ACT 4455 / 4459
SINGLE SUPPLY TRANSCEIVERS
FOR MIL-STD-1553/1760
Features
• Single 5 Volt Supply Operation
• Low Power Dissipation
• Small Size & Light Weight
• Single Transceiver 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
• DESC SMD# 5962-96741
CIRCUIT TECHNOLOGY
www.aeroflex.com/act1.htm
General Description:
The Aeroflex Circuit Technology
ACT4455 / 4459 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 ACT4455 / 4459 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
TX DATA OUT
TX DATA OUT
COMP.
RX DATA OUT
COMP.
RX DATA OUT
Block Diagram (without Transformer)
Transmitter:
The Transmitter section accepts
bi-phase TTL data at the input and
when coupled to the data bus with a
1:2.5 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 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,
eroflex Circuit Technology – Data Bus Modules For The Future © SCD4455 REV A 1/29/98









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ACT4455 Даташит, Описание, Даташиты
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
Waveform, Figure 1.) The
Transmitter may be safely operated
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
DATA, and represent positive and
negative excursions of the input
beyond a pre-determined
threshold.(See Receiver Logic
Waveform. Figure 2.)
The pre-set internal thresholds will
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
Figure 1 — Transmitter Logic Waveforms Idealized*
DATA IN
DATA IN
INHIBIT
LINE TO LINE
OUTPUT
Note: DATA and DATA inputs must be complementary waveforms or 50% duty cycle average, with no delays between them,
and must be in the same state during off times (both high or low).
Figure 2 — Receiver Logic Waveforms Idealized*
LINE TO LINE
INPUT
STROBE
DATA OUT
DATA OUT
* See Figure 8 For Actual Waveforms
Aeroflex Circuit Technology
Note overlap
2 SCD4455 REV A 1/29/98 Plainview NY (516) 694-6700









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ACT4455 Даташит, Описание, Даташиты
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
Maximum junction to case temperature
2 Watts
(Note: Normal operation conditions require one transceiver on and the
other off.)
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
"0" Input Current
"1" Input Current
"0" Input Voltage
"1" Input Voltage
VIN = 0.4 V
VIN = 2.7 V
IILD
IIHD
VILD
VIHD
-0.2
1
2.0
Max
-0.4
40
0.7
Unit
mA
µA
V
V
Inhibit Characteristics
"0" Input Current
"1" Input Current
"0" Input Voltage
"1" Input Voltage
Delay from TX inhibit, (0¡1) to inhibited output
Delay from TX inhibit, (1¡0) to active output
Differential output noise, inhibit mode
Differential output impedance (inhibited)
VIN=0.4V
VIN=2.7V
Note 1
IILI
IIHI
VILI
VIHI
tDXOFF
tDXON
VNOI
ZOI
-0.2 -0.4
1.0 40
0.7
2.0
250 350
150 250
2 10
2K
mA
µA
V
V
nS
nS
mVP-P
Output Characteristics
Differential output level
Rise and fall times(10% to 90% of P-P output)
Output offset at point A-A' on Figure 5, 2.5µS
after midpoint crossing of the parity bit of the
last word of a 660µS message
Delay from 50% point of TX DATA or TX DATA
input to zero crossing of differential signal
RL=35
RL=35
VO
tr
VOS
tDTX
6 7.5 9
100 200 300
VP-P
nS
± 90 mV peak
120 250
nS
Note 1. Power on or off, measured from 75KHz to 1MHz at point A-A' and transformer self impedance of 3K
minimum
Aeroflex Circuit Technology
3 SCD4455 REV A 1/29/98 Plainview NY (516) 694-6700










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