CT1469-2
MIL-STD-1397 Type E 10MHz Transceiver
Features
Low Level ±0.65V output
Optional transformer isolation
Internally set threshold
Operates with ±5 volt supply
Matched to 50 ohms system impedance power on or off
Bipolar construction for radiation resistance
Power management
Interfaces directly to the CT1496-2 (Manchester Encoder)
and CT1508-2 (Manchester Decoder)
• MIL-PRF-38534 compliant devices available
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CIRCUIT TECHNOLOGY
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General Description
CT1469-2 is a hybrid microcircuit which incorporates a MIL-STD 1397 Type E 10MHz transceiver in
a single package. The transmitter section accepts 10MHZ serial Manchester encoded TTL NRZ data
from the encoder and transformer couples a bipolar ±0.65 volt (nominal) signal level to a 50 ohm
triaxial cable for transmission up to 1000 ft. The CT1469-2 receiver accepts a bipolar signal level
and outputs an NRZ TTL serial data or SIS / SOS signal to the decoder (CT1508-2). Aeroflex Circuit
Technology is a 80,000 square foot MIL-PRF-38534 certified facility in Plainview, N.Y.
Power
Conditioner
Drive 2
Linear
Amp
TX Data Input
Xfmr Sec /
RX Data Input
Xfmr Sec
Xfmr Primary /
TX Data Output
Xfmr Primary /
TX Data Output
TX Inhibit
TX Data Input
+5V
Drive 1
-5V
Receiver
Strobe
Digital and Analog
Gnd
Xfmr Sec
Linear
Amp
Xfmr Sec /
RX Data Input
Level
Detector
RX Data
Level
Detector
RX Data
Figure 1 – Block Diagram
eroflex Circuit T
echnology
– Data Bus Modules For The Future © SCDCT1469 REV A 3/22/00
Introduction
The specification detailed herein encompasses a hybrid transceiver designed to meet
the requirements of STANAG 4153 and Type E requirements of MIL-STD-1397. The
transceiver is transformer coupled to the specified triaxial cable and is available
compliant to MIL-PRF 38534.
Electrical Requirements
See Figure 1 for block diagram. All input and output signals are manchester encoded.
The transformer is internal to the package with its use being optional.
Aeroflex Circuit Technology
2
SCDCT1469 REV A 3/22/00 Plainview NY (516) 694-6700
Absolute Maximum Ratings
Parameter
Supply Voltage
Vcc
V
EE
Input Voltage
Digital V
IN
(
D
)
Receiver V
IN
(
R
)
Power Dissipation P
D
Storage Temperature Range T
STG
Operating Case Temperature Range T
C
Rating
+0.5 to +7.0
-0.5 to -7.0
-0.5 to +5.5
±2
2.0
-60 to +150
-55 to +100
Units
V
V
V
V
W
°C
°C
DC Electrical Characteristics
(V
CC
= 5V ±10%, V
EE
= -5V ±10%, T
C
= -55 °C to +100°C, unless otherwise specified)
SYMBOL
PARAMETER
LIMIT
RX DATA (7), RX DATA (8)
V
OH
V
OL
Logic High Output Voltage
Logic Low Output Voltage
2.4V min @ I
OH
= -80µA, V
CC
= +4.5V,
V
EE
= -4.5V
0.4V max @ I
OL
= 3.2mA, V
CC
= +4.5V,
V
EE
= -4.5V
TX DATA INPUT (22), TX DATA INPUT (24)
1/
I
IH
I
IL
Logic High Input Current
Logic Low Input Current
50µA max @ V
IH
= 2.4V, V
CC
= +5.5V, V
EE
= -5.5V
-2mA max @ V
IL
= 0.4V, V
CC
= +5.5V, V
EE
= -5.5V
TX INHIBIT INPUT (23)
1/
I
IH
I
IL
Logic High Input Current
Logic Low Input Current
100µA max @ V
IH
= 2.4V, V
CC
= +5.5V,
V
EE
= -5.5V
-4mA max @ V
IL
= 0.4V, V
CC
= +5.5V, V
EE
= -5.5V
Aeroflex Circuit Technology
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SCDCT1469 REV A 3/22/00 Plainview NY (516) 694-6700
DC Electrical Characteristics (con’t)
(V
CC
= 5V ±10%, V
EE
= -5V ±10%, T
C
= -55 °C to +100°C, unless otherwise specified)
SYMBOL
PARAMETER
LIMIT
RECEIVER STROBE (21)
1/
I
IH
I
IL
Logic High Input Current
Logic Low Input Current
40µA max @ V
IH
= 2.4V, V
CC
= +5.5V,
V
EE
= -5.5V
-3mA max @ V
IL
= 0.4V, V
CC
= +5.5V,
V
EE
= -5.5V
Power Supply Currents
STANDBY
I
CC
I
EE
V
CC
= +5.5V, V
EE
= -5.5V,
V
23
= GND, V
26
= -V
EE
90mA max
70mA max
100% Transmission
I
CC
I
EE
V
CC
= +5.5V, V
EE
= -5.5V,
V
23
= 2.4V min, f
IN
= 10MH
Z
150mA max
125mA max
Notes:
1/ Maximum total capacitance loads allowable on these pins are:
DATA, DATA
TX INHIBIT
RX STROBE
10 pF max
15 pF max
45 pF max
Transmitter Timing Characteristics
(V
CC
= 5V ±10%, V
EE
= -5V ±10%, T
C
= -55 °C to +100°C, See Figure 2 and 3, unless otherwise specified)
Symbol
V
A
T
T
S
T
E
T/2
T
R
T
F
Parameter / Condition
Output amplitude
1
Pulse period
Width of 1
ST
positive half bit
Width of last half bit
Half pulse period
Pulse rise time
Pulse fall time
Min
0.45
97
45
47
47
0.05
0.05
Max
0.8
103
65
65
53
0.3
0.3
Unit
V
nsec
nsec
nsec
nsec
V/nsec
V/nsec
Aeroflex Circuit Technology
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SCDCT1469 REV A 3/22/00 Plainview NY (516) 694-6700
Transmitter Timing Characteristics (con’t)
(V
CC
= 5V ±10%, V
EE
= -5V ±10%, T
C
= -55 °C to +100°C, See Figure 2 and 3, unless otherwise specified)
Symbol
V
S
V
US
T
OS
T
DTX
V
N
Zo
Inhibit
Parameter / Condition
Voltage overshoot
Voltage undershoot
Offset Voltage – 2T after last zero crossing
Delay from data input to transformer secondary
Transmitter noise output with transmitter inhibited
Output impedance
External-TTL low inhibits outputs
Internal-Equal input signals inhibit output
Min
-
-
-
-
-
45
Max
100
100
30
50
35
55
Unit
mV
mV
mV
nsec
mV
Ω
1. Pins 25 and 27 are not used for MIL-STD-1397 Type E nominal output signal levels.
Receiver Timing Characteristics
(V
CC
= 5V ±10%, V
EE
= -5V ±10%, T
C
= -55 °C to +100°C, See Figure 4, unless otherwise specified)
Symbol
V
IN
V
CM
Parameter / Condition
Input signal to receiver
Common Mode Rejection
DC to 1.0MHz
2.0MHZ to 20MHz
Signal rejection
No response to single ended signals
Delay from 50% point of positive input
signal to 50% point of data output
Delay from 50% point of negative input
signal to 50% point of data output
Output signal
Complementary TTL drive capability
of 2 TTL Loads
To input data, setup time Receiver Strobe
Enable
Receiver Strobe hold time
Strobe – Forces outputs low, logic low
inhibits reception
High
Low
Min
±0.22
-
-
-
-
-
-
Max
±0.88
20
5
10
-9
±0.13
30
30
Unit
V
PK
V
PK
-
TO
-
PK
V
PK
-
TO
-
PK
Volts-Seconds
V
PK
nsec
nsec
V
T
T
D1
T
D2
V
O
2.4
-
5
20
-
0.4
-
-
V
V
nsec
nsec
T
RSU
T
RSH
Strobe
Aeroflex Circuit Technology
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SCDCT1469 REV A 3/22/00 Plainview NY (516) 694-6700
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