Standard Products
UT63M1XX MIL-STD-1553A/B Bus Transceiver
Data Sheet
Sept. 1999
FEATURES
q
Full conformance to MIL-STD-1553A and 1553B
q
Completely monolithic bipolar technology
q
Low power consumption
q
Fit and functionally compatible to industry standard 631XX
series
q
Idle low encoding version
q
Flexible power supply voltages: V
CC
=+5V, V
EE
=-12V or
15V, and V
CCA
=+5V to +12V or +5V to +15V
-
INTRODUCTION
The monolithic UT63M1XX Transceivers are complete
transmitter and receiver pairs conforming fully to MIL-STD-
1553A and 1553B. Encoder and decoder interfaces are idle low.
UTMC’s advanced bipolar technology allows the positive
analog power to range from +5V to +12V or +5V to +15V,
providing more flexibility in system power supply design.
The receiver section of the UT63M1XX series accepts biphase-
modulated Manchester II bipolar data from a MIL-STD-1553
data bus and produces TTL-level signal data at its RXOUT and
RXOUT outputs. An external RXEN input enables or disables
the receiver outputs.
q
Full military operating temperature range, -55°C to +125°C,
screened to QML Q or QML V requirements
q
Standard Military Drawing available
RXEN
RXOUT
RXIN
RXIN
FILTER
and
LIMITER
THRESHOLD
REFERENCE
DRIVERS
TXOUT
COMPARE
TXOUT
TXIN
FROM ENCODER
TXIN
FILTER
TO DECODER
RXOUT
TXIHB
Figure 1. Functional Block Diagram
1
The transmitter section accepts biphase TTL-level signal data
at its TXIN and TXIN and produces MIL-STD-1553 data
signals. The transmitter’s output voltage is typically 42V
PP
, L-
L. Activating the TXIHB input or setting both data inputs to
the same logic level disables the transmitter.
The UT63M1XX series offers a monolithic transmitter and
receiver packaged in either single channel (24-pin) or dual-
channel (36-pin) configurations designed for use in any MIL-
STD-1553 application.
Legend for TYPE field:
TI = TTL input
TO = TTL output
DO = Differential output
DI = Differential input
() = Channel designator
TRANSMITTER
NAME
TXOUT
(A)
TXOUT
(B)
TXOUT
(A)
TXOUT
(B)
TXIHB
(A)
TXINB
(B)
TXIN
(A)
TXIN
(B)
TXIN
(A)
TXIN
(B)
PACKAGE PIN
SINGLE
DUAL
1
1
N/A
2
N/A
21
N/A
22
N/A
23
N/A
10
2
11
34
25
35
26
36
27
TYPE
DO
DO
DO
DO
TI
TI
TI
TI
TI
TI
TXIN is the complement of TXIN input.
Transmitter inputs: TXIN and TXIN are complementary TTL-level
Manchester II encoder inputs.
Transmitter inhibit: this is an active high input signal.
TXOUT is the complement of TXOUT.
DESCRIPTION
Transmitter outputs: TXOUT and TXOUT are differential data signals.
2
RECEIVER
NAME
RXOUT
(A)
RXOUT
(B)
RXOUT
(A)
RXOUT
(B)
RXEN
(A)
RXEN
(B)
RXIN
(A)
RXIN
(B)
RXIN
(A)
RXIN
(B)
PACKAGE PIN
SINGLE
DUAL
7
5
N/A
10
N/A
8
N/A
15
N/A
16
N/A
14
8
17
6
15
29
20
30
21
TYPE
TO
TO
TO
TO
TI
TI
DI
DI
DI
DI
RXIN is the complement of RXIN input.
Receiver inputs: RXIN and RXIN are biphase-modulated Manchester
II bipolar inputs from MIL-STD-1553 data bus.
Receiver enable/disable: This is an active high input signal.
RXOUT is the complement of RXOUT output
DESCRIPTION
Receiver outputs: RXOUT and RXOUT are complementary
Manchester II decoder outputs.
POWER AND GROUND
NAME
V
CC
(A)
V
CC
(B)
V
CCA
(A)
V
CCA
(B)
V
EE
(A)
V
EE
(B)
GND
(A)
GND
(B)
PACKAGE PIN
SINGLE
DUAL
20
33
N/A
13
N/A
19
N/A
3, 9, 18
N/A
24
28
19
32
23
3, 7, 31
12, 16, 22
TYPE
PWR
PWR
PWR
PWR
PWR
PWR
GND
GND
Ground reference
-12 or -15V
DC
power (± 5%)
Recommended de-coupling capacitors 4.7µF and.1µF
+5 to +12V
DC
power or
+5 to +15V
DC
power (± 5%)
+5V
DC
power (±10%)
DESCRIPTION
3
TXOUT
TXOUT
GND
NC
NC
NC
RXOUT
RXEN
GND
RXOUT
NC
NC
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
CHANNEL 20
A
19
18
17
16
15
14
13
NC
TXIN
TXIN
TXIHB
V
CC
V
EE
GND
NC
RXIN
RXIN
NC
V
CCA
Figure 2a. Functional Pin Diagram--Single Channel
TXOUT
TXOUT
GND
NC
RXOUT
RXEN
GND
RXOUT
NC
TXOUT
TXOUT
GND
NC
RXOUT
RXEN
GND
RXOUT
NC
1
2
3
4
5
6
7
8
9
10
11
12
36
35
34
CHANNEL 33
A
32
31
30
29
26
28
27
26
25
TXIN
TXIN
TXIHB
V
CC
V
EE
GND
RXIN
RXIN
V
CCA
TXIN
TXIN
TXIHB
V
CC
V
EE
GND
RXIN
RXIN
V
CCA
13 CHANNEL 24
B
14
23
15
16
17
18
22
21
20
19
Figure 2b. Functional Pin Diagram--Dual Channel
4
TRANSMITTER
The transmitter section accepts Manchester II biphase TTL data
and converts this data into differential phase-modulated current
drive. Transmitter current drivers are coupled to a MIL-STD-
1553 data bus via a transformer driven from the TXOUT and
TXOUT terminals. Transmitter output terminals’ non-
transmitting state is enabled by asserting TXIHB (logic 1), or
by placing both TXIN and TXIN at the same logic level. Table
1, Transmit Operating Mode, lists the functions for the output
data in reference to the state of TXIHB. Figure 3 shows typical
transmitter waveforms.
RECEIVER
The receiver section accepts biphase differential data from a
MIL-STD-1553 data bus at its RXIN and RXIN inputs. The
receiver converts input data to biphase Manchester II TTL
format and is available for decoding at the RXOUT and RXOUT
terminals. The outputs RXOUT and RXOUT represent positive
and negative excursions (respectively) of the inputs RXIN and
RXIN. Figure 4 shows typical receiver output waveforms.
Models UT63M105, UT63M107, UT63M125, and UT63M127
idle in the “0” state when disabled or receiving no signal.
TXIN
BOTH HIGH
OR
BOTH LOW
TXIN
TXIHB
LINE-TO-LINE
DIFFERENTIAL
OUTPUT
TXOUT, TXOUT
90%
10%
TXIN
TXIN
t
TXDD
Figure 3. Typical Transmitter Waveforms
POWER SUPPLY VOLTAGES
The UT63M1XX series meets device requirements over a wide
range of power supply voltages. Table 2 shows the overall
capabilities of all available devices. Each channel of the dual
transceiver is electrically and physically separate from the other
and fully independent, including all power and signal lines. Thus
there will be no interaction between the channels.
Table 1. Transmit Operating Mode
TXIN
x
1
0
0
1
1
TXIN
x
0
1
0
1
TXIHB
1
x
0
0
x
TXOUT
Off
2
Off
3
On
On
Off
3
Notes:
1. x = Don’t care.
2. Transmitter output terminals are in the non-transmitting mode during Off
time.
3. Transmitter output terminals are in the non-transmitting mode during Off
time, independent of TXIHB status.
5
MCU
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