Mil-Std-1553 Products
Single Channel Hybrid Transceivers
NATIONAL HYBRID, INC.
2200 Smithtown Avenue, Ronkonkoma, NY 11779
(516) 981-2400 FAX 516-981-8888
Features/Applications:
Description:
Available for +15V, +12V, and +5V
Only Applications
Very Low Standby Power
Low Thermal Resistance
Very Low Dynamic Offset
Short Circuit Proof
Superior Noise Performance
Screened to Mil-PRF-38534
The NHI family of single transceivers are available in
1.275" x .780", 24 pin plug-in and flatpack packages.
The receiver converts the 1553 bus bi-phase data to
complementary RX and RX_L TTL digital outputs
for use by the manchester decoder. The device
provides a receiver enable strobe input to control the
outputs of the received data. Devices are available
with receiver outputs normally HIGH or LOW
during standby mode for compatibility with industry
standard decoders.
The transmitter will output bi-phase manchester to
the coupling transformer when the TX and TX_L
inputs are driven by complementary TTL digital data.
The device provides a transmitter inhibit input
TXINH to disable the transmitter.
Isolation
Transformer
Direct
Or
Transformer
Coupler Box
Data Bus
TXOUT
TXOUT_L
RXIN
RXIN_L
RX
Input
Filter
Comparator
RX
Receive
Logic
RECEIVER
RXENA
RX_L
RX
TXINH
TX_L
TX
TRANSMITTER
TX
Transmit
Logic
Shaping
Network
Figure I: Block Diagram
+5V
+V
Device
Power
Supply +V
Transformer
Turns Ratio
Direct
Transformer
Turns Ratio
Stub
Technitrol
Part Number
DESC SMD
NHI-1508
+15V
1.40:1.00
2.00:1.00
Q1553-2
NHI-1509
+15V
1.40:1.00
2.00:1.00
Q1553-2
5962-8604906
NHI-1510
+15V
1.40:1.00
2.00:1.00
Q1553-2
NHI-1531
+12V
1.25:1.00
1.66:1.00
Q1553-3
5962-9082905
NHI-1534
+5V Only
1.00:2.12
1.00:1.50
Q1553-5
NHI-1535
+5V Only
1.00:2.12
1.00:1.50
Q1553-5
NHI-1545
+12V
1.25:1.00
1.66:1.00
Q1553-3
5962-9082906
Transformer Requirements:
The NHI-15XX series of single channel
transceivers require a transformer in
order to couple to the Mil-Std-1553 Bus.
The turns ratios required for both Direct
and Transformer Coupling for each
device type, and the corresponding
Technitrol part numbers Q1553-X are
outlined in the table below.
The center tap on the transceiver side of
the isolation transformer must be
grounded.
TRANSFORMER COUPLED
NHI-15XX
TXOUT
TXOUT_L
RXIN
RXIN_L
NHI-15XX
TXOUT
TXOUT_L
RXIN
RXIN_L
DIRECT COUPLED
55
55
Zo
Zo
.75Zo
.75Zo
See Table 1:1.4
Figure II: BUS Connections
See Table
Single Channel Transceivers
A
B
D C
E
G
F
19
18
TOP VIEW
24 Pin Plug-In Package Detail
24
1
A
B
D
C
E
G
F
24
13
12
H
TOP VIEW
24 Pin Flatpack Package Detail
1
24 Pin Plug-In Dimensions
DIM
TYP
(inches)
TOL
(+/- inches)
A
1.270 "
0.010 "
B
11 EQ SP @
0.100 = 1.700 "
C
0.770 "
0.010 "
D
0.600 "
0.010 "
E
0.215 "
MAX
F
0.175 "
MIN
G
0.018 " DIA.
0.002 "
24 Pin Flatpack Dimensions
DIM
TYP
(inches)
TOL
(+/- inches)
A
1.275 "
0.010 "
B
11 EQ SP @
0.100 =1.100 "
C
0.775 "
0.010 "
D
0.175 "
MAX
E
0.072 "
0.010 "
F
0.500 "
MIN
G
0.015 "
0.003 "
H
0.010 "
0.002 "
Single Channel Transceivers
+15V & +12V Device Pin Functions
Pin#
Function
Pin#
Function
1 TXOUT
24 NC
2 TXOUT_L
23 TX_L
3 GND
22 TX
4 NC
21 TXINH
5 NC
20 +5V
6 NC \1
19 NC
7 RX
18 GND
8 RXENA
17 NC
9 GND
16 RXIN_L
10 RX_L
15 RXIN
11 NC
14 NC
12 NC
13 +V
Pin#
Function
Pin#
Function
1 TXOUT
24
NC
2 TXOUT_L
23
TX_L
3 GND
22
TX
4 NC
21
TXINH
5 NC
20
+5V
6 NC
19
NC
7 RX
18
GND
8 RXENA
17
NC
9 GND
16
RXIN_L
10 RX_L
15
RXIN
11 NC
14
NC
12 NC
13
NC
+5V Only Device Pin Functions
\1 Control voltage input TXVOC for
NHI-1508 variable transmitter
output transceiver.
Single Channel Transceivers
Ordering Information:
NHI-1508 FP / 883
Reliability Grade
M
= Military, -55 to +125 C
Blank = Industrial, -40 to +85 C
Package Style
FP
= Flatpack
Blank = Plug-In
Decoder Compatibility
08
= +15V, Variable Output, RX & RX_L, Standby = Logic 0
09
= +15V,
See QML-38534 for NHI's Manufacturer Qualification Under Mil-PRF-38534
Fully Compliant with Mil-Std-883
883
=
10
= +15V,
31
= +12V,
34
= +5V,
35
= +5V,
RX & RX_L, Standby = Logic 0
RX & RX_L, Standby = Logic 1
RX & RX_L, Standby = Logic 0
RX & RX_L, Standby = Logic 0
RX & RX_L, Standby = Logic 1
45
= +12V, RX & RX_L, Standby = Logic 1
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