NATIONAL HYBRID, INC.
2200 Smithtown Avenue, Ronkonkoma, NY 11779
(631) 981-2400 FAX 631-981-8888
Mil-Std-1553/1760/MacAir Products
NHi-1559 & NHi-1563
+5V Monolithic Dual Transceivers
Features:
Compliant to Mil-Std-1553A & B, Mil-Std-1760
Single +5V Supply
!!
1.5 Watts Maximum Power Dissipation @ 100%
Duty Cycle
!!
Output Driver Withstands Short Circuit Fault
Proprietary Monolithic Design Provides
Superior Reliability with outstanding
Thermal Impedance Characteristics
!!
Superior Noise Performance Characteristics
!!
Description:
The NHI-1559, 1563 Mil-Std-1553/1760 monolithic
dual transceivers are available in 1.900" x .780", 36
pin plug-in and flatpack packages. It operates off of a
single +5V power supply with very low standby power
dissipation.
Each 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 independent receiver enables for each
channel.
The transmitters 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 an independent transmitter
inhibit TXINH for each channel.
1553
Data Bus
Isolation
Transformer
TXOUT
+5V
TRANSMITTER
TX
TX
Transmit
TX_L
TXINH
Logic
Coupler Box
Direct
Or
Transformer
Shaping
Network
TXOUT_L
RECEIVER
RX
RX
Receive
RX_L
Logic
RXENA
Comparator
Filter
RXIN
RX
Input
RXIN_L
Figure I: NHI-1559/63 Block Diagram
(Each Channel)
NHi-1559 & NHi-1563
Table II: Pin Functions
Pin#
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
Function
TXOUT_A
TXOUT_A_L
GND_A
NC
RXA
RXENA_A
GND_A
RXA_L
NC
TXOUT_B
TXOUT_B_L
GND_B
NC
RXB
RXENA_B
GND_B
RXB_L
NC
Pin#
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
Function
TXA_L
TXA
TXINH_A
+5V_A
NC
GND_A
RXIN_A_L
RXIN_A
NC
TXB_L
TXB
TXINH_B
+5V_B
NC
GND_B
RXIN_B_L
RXIN_B
NC
TXOUT_L
RXIN
RXIN_L
TXOUT_L
RXIN
RXIN_L
Transformer Requirements:
The NHi-1559/1563 requires a transformer with a turns
ratio of 1:2.5 for Direct Coupling, and a turns ratio of
1:1.79 for Transformer Coupling to the Mil-Std-1553 Bus.
Technitrol part number Q1553-45 or equivalent is
recommended. The center tap on the transceiver side of
the isolation transformer must be grounded.
TRANSFORMER COUPLED
NHI-1559/63
TXOUT
Zo
1:1.79
1:1.4
.75Zo
.75Zo
NHI-1559/63
TXOUT
DIRECT COUPLED
1:2.5
55
55
Zo
Figure II: BUS Connections
A
B
36
TOP VIEW
18
1
1
A
B
H
19
DC
TOP VIEW
C
36
19
18
E
F
G
F
G
D
E
Figure III: Plug-In Package Detail
Figure IV: Flatpack Package Detail
Table IV: Flatpack Dimensions
DIM
A
B
C
D
E
F
G
H
TYP
(inches)
1.900 "
17 EQ SP @
0.780 "
0.185 "
0.080 "
0.500 "
0.018 "
0.010 "
TOL
(+/- inches)
0.010 "
0.100 =1.700 "
0.010 "
0.012 "
0.010 "
MIN
0.002 "
0.002 "
Table III: Plug-In Dimensions
DIM
A
B
C
D
E
F
G
TYP
(inches)
1.900 "
17 EQ SP @
0.780 "
0.600 "
0.185 "
0.250 "
0.018 " DIA.
TOL
(+/- inches)
0.010 "
0.100 = 1.700 "
0.010 "
0.010 "
0.010 "
MIN
0.002 "
NHi-1559 & NHi-1563
Transmit Waveforms
TX
TX_L
Vout
(Line to Line)
Transmitter Operation:
A high level input on TXINH will
inhibit the transmitter outputs. If the
TX & TX_L transmitter inputs are
both high or both low, the
transmitter is also inhibited. The
output drivers are short circuit
protected and the device will "fold
back" to decrease power dissipation
under this condition until the fault is
removed.
Receiver Operation:
Receive Waveforms
Vin
(Line to Line)
RX
RX_L
A low level input on RXENA will
disable the receiver outputs RX &
RX_L regardless of bus activity. The
receiver output compatibility may be
specified as logic 0 or logic 1 when in
standby mode.
Ordering Information:
NHI-1559 FP / 883
Reliability Grade
883
= Fully Compliant with Mil-Std-883
= Screened to Mil-Std-883, -55 to +125 °C
M
Blank = Industrial, -40 to +85 °C
Package Style
Blank = Plug-In (Figure III)
FP
= Flatpack (Figure IV)
Transceiver Type and Decoder Compatibility
1559
1563
* 1559
* 1563
= Mil-Std-1553, RX & RX_L, Standby = Logic 0
= MacAir,
RX & RX_L, Standby = Logic 0
Tx Rise & Fall Time, 100ns min, 300ns max.
Tx Rise & Fall Time, 220ns min, 300ns max.
See QML-38534 for NHI's Manufacturer Qualification Under Mil-PRF-38534
V: October 2005
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