NATIONAL HYBRID, INC.
2200 Smithtown Avenue, Ronkonkoma, NY 11779
(516) 981-2400 FAX 516-981-8888
Mil-Std-1553 Products
NHI-1501 Series
+15V Dual Transceivers
Features/Applications:
Very Low Standby Power
Low Thermal Resistance
Totally Isolated Channels
Short Circuit Proof
Superior Noise Performance
Screened to Mil-PRF-38534
Description:
The NHI +15V dual transceivers are available in
1.900" x .780", 36 pin plug-in and flatpack packages.
Each receiver converts the 1553 bus bi-phase data to
complementary RX and RX_H TTL digital outputs
for use by the manchester decoder. The device
provides independent receiver enables for each
channel. Devices are available with receiver outputs
normally HIGH or LOW during standby mode for
compatibility with industry standard decoders.
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.
+5V
TRANSMITTER
TX
TX
Transmit
TX_L
TXINH
Logic
+15V
Data Bus
Isolation
Transformer
TXOUT
Coupler Box
Direct
Or
Transformer
Shaping
Network
TXOUT_L
RECEIVER
RX
RX
Receive
RX_L
Logic
RXENA
Comparator
Filter
RX
Input
RXIN_L
RXIN
Figure I: Block Diagram
(Each Channel)
NHI-1501 Series
TABLE I: Electrical Specifications
Parameter
POWER SUPPLY
REQUIREMENTS
V
CC
SUPPLY CURRENT
+V SUPPLY CURRENT
Vcc=5.0V, +V=15.0V, total hybrid
Vcc=5.0V, +V=15.0V, each channel,
not transmitting
Vcc=5.0V, +V=15.0V, One channel
@ 100% duty cycle
POWER DISSIPATION
OPERATING
TEMPERATURES
THERMAL IMPEDANCE
LOGIC I/O
RXENA_A, TXA, TXA_L,
TXINH_A, RXENA_B, TXB,
TXB_L, TXINH_B
RXA, RXA_L, RXB, RXB_L
Vcc= 5.5V, Vil= 0.0V
Vcc= 4.5V, Vih= 2.7V
Vcc= 5.5V, Iol= -8 mA
Vcc= 4.5V, Ioh= 400 uA
RECEIVER
Input Resistance
Input Capacitance
Common Mode Rejection Ratio
Threshold Voltage
Input Level
Receiver Delay
TRANSMITTER
Output Voltage
Rise/Fall Time
Transmitter Delay
Output Dynamic Offset Voltage
Output Noise
Output Resistance
Across 35 W load
TXVOC = +V = 12.0V
10% to 90% of peak to peak output
TX or TX_L edge to bus zero
crossing
Across 35 W load
Differential
Differential, not transmitting
V
OUT
t
R
, t
F
t
TD
Vdyn
Vnpp
Rout
10
-90
6
100
150
9
300
250
90
10
Vpp
nS
nS
mV
mVpp
kΩ
Ω
Differential
Differential
Zero Crossing on bus to RX or RX_L
1 MHz sine wave
1 MHz sine wave
Rin
Cin
CMRR
Vth
Vin
t
RD
40
0.56
40
400
1.0
7
5
k
Ω
pF
dB
Vpp
Vpp
nS
Iil
Iih
Vol
Voh
2.5
-0.8
40
0.5
mA
uA
V
V
Vcc=5.0V, +V=15.0V, Transmit one
channel @ 100% duty cycle
Junction
Case
Storage
Junction to Case
Condition
Symbol
Vcc
+V
Icc
+I
+I
100%
Pd
Tj
Tc
Ts
θ
jc
Min
4.7
14.25
Typ
Max
5.5
15.75
25
25
210
0.96
Units
V
V
mA
mA
mA
W
°C
°C
°C
°C/W
-55
-55
-65
160
125
150
8.8
NHI-1501 Series
36 Pin Package 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 / -15V_A
GND_A
RXIN_A_L
RXIN_A
+15V_A
TXB_L
TXB
TXINH_B
+5V_B
NC / -15V_B
GND_B
RXIN_B_L
RXIN_B
+15V_B
TXOUT_L
RXIN
RXIN_L
TXOUT_L
RXIN
RXIN_L
Transformer Requirements:
The NHI-1501 requires a transformer with a turns ratio of
1.40:1.00 for Direct Coupling, and a turns ratio of
2.00:1.00 for Transformer Coupling to the Mil-Std-1553
Bus. Technitrol part number Q1553-2 or equivalent is
recommended. The center tap on the transceiver side of
the isolation transformer must be grounded.
TRANSFORMER COUPLED
NHI-1501
TXOUT
Zo
2.00:1
1:1.4
.75Zo
.75Zo
NHI-1501
TXOUT
DIRECT COUPLED
1.4:1
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
36 Pin Plug-In Package Detail
DIM
A
B
C
D
E
F
G
TYP
(inches)
1.900 SQ
17 EQ SP @
0.780
0.600
0.185
0.250
0.018
TOL
(+/- inches)
0.010
0.100 = 1.700
0.010
0.010
0.010
MIN
0.002
36 Pin Flatpack Package Detail
DIM
A
B
C
TYP
(inches)
1.900 SQ
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
D
E
F
G
H
NHI-1501 Series
Transmit Waveforms
TX
TX_L
Vout
(Line to Line)
t
TD
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.
Receive Waveforms
Vin
(Line to Line)
RX
RX_L
t
RD
Receiver Operation:
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.
** See Ordering Information
Ordering Information:
NHI-1501 FP / 883
Reliability Grade
883
= Fully Compliant with Mil-Std-883
= Military, -55 to +125 °C
M
Blank = Industrial, -40 to +85 °C
Package Style
Blank = Plug-In
FP
= Flatpack
GW = NHI Standard Gull Wing Lead Formed Surface Mount Flatpack
Decoder Compatibility
01
= RX & RX_L, Standby = Logic 1
0
** SMD Listing: DESC Drawing# 5962-89447 for NHI-1501
See QML-38534 for NHI's Manufacturer Qualification Under Mil-PRF-38534
V: October 2005
