UTMC 5962R9322604VZX, 5962R9322604VZC, 5962R9322604VZA, 5962R9322604VXC, 5962R9322604VXA Datasheet

1

Standard Products

UT63M14x MIL-STD-1553A/B Bus Transceiver

Data Sheet

Sept. 1999

FEATURES

q 5-volt only operation (+10%)
q Completely monolithic bipolar technology
q Fit and functionally compatible to industry standard

transceiver

q Idle low transmitter inputs and receiver outputs
q Dual-channel 50-mil center 24-lead Flatpack
q Dual-channel 100-mil center 36-pin DIP
q Full military operating temperature range, -55°C to +125°C,

screened to QML Q or QML V requirements

q Radiation hardened to 1.0E6 rads(Si)
q Supports MIL-STD-1760 (UT63M145) and MIL-STD-1553

(UT63M147)

q Standard Microcircuit Drawing (SMD) 5962-93226

available

INTRODUCTION

The monolithic UT63M14x Transceivers are complete
transmitter and receiver pairs for MIL-STD-1553A and 1553B
applications. Encoder and decoder interfaces are idle low.

The receiver section of the UT63M14x series accepts biphase­modulated 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.

TXIN

RXOUT

RXEN

FROM ENCODER

TO DECODER

DRIVERS

COMPARE

F ILTER

LIMITER

and

F ILTER

TXIHB

Figure 1. Functional Block Diagram

RXIN

TXOUT

RXIN

TXOUT

RXOUT

TXIN

THRESHOLD
REFERENCE

2

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
12 V

PP, L-L

. Activating the TXIHB input or setting both data

inputs to the same logic level disables the transmitter outputs.

The UT63M14x series offers complete transmitter and receiver
pairs packaged in a dual-channel 36-pin DIP or 24-lead flatpack
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
DIO = Differential input/output
( ) = Channel designator
[ ] = 24-lead flatpack

TRANSMITTER

Note:

1.The 24-lead flatpack internally connects TXOUT to RXIN (CHA, CHB) and TXOUT to RXIN (CHA, CHB) for each channel.

NAME PIN

NUMBER

TYPE DESCRIPTION

TXOUT

1

(A)

TXOUT

(B)

1 [1]

10 [7]

DO

[DIO]

DO

[DIO]

Transmitter outputs: TXOUT and TXOUT are differential data
signals.

TXOUT

1

(A)

TXOUT

(B)

2 [2]

11 [8]

DO

[DIO]

DO

[DIO]

TXOUT is the half-cycle complement of TXOUT.

TXIHB

(A)

TXIHB

(B)

34 [22]

25 [16]

TI

TI

Transmitter inhibit: This is an active high input signal.

TXIN

(A)

TXIN

(B)

35 [23]

26 [17]

TI

TI

Transmitter input: TXIN and TXIN are complementary TTL­level Manchester II encoder inputs.

TXIN

(A)

TXIN

(B)

36 [24]

27 [18]

TI

TI

TXIN is the complement of TXIN input.

3

RECEIVER

Note:

1.The 24-lead flatpack internally connects TXOUT to RXIN (CHA, CHB) and TXOUT to RXIN (CHA, CHB) for each channel.

POWER AND GROUND

NAME PIN

NUMBER

TYPE DESCRIPTION

RXOUT

(A)

RXOUT

(B)

5 [4]

14 [10]

TO

TO

Receiver outputs: RXOUT and RXOUT are complementary
Manchester II decoder outputs.

RXOUT

(A)

RXOUT

(B)

8 [6]

17 [12]

TO

TO

RXOUT is the complement of RXOUT output.

RXEN

(A)

RXEN

(B)

6 [5]

15 [11]

TI

TI

Receiver enable/disable: This is an active high input signal.

RXIN

1

(A)

RXIN

(B)

29 [1]

20 [7]

DI

[DIO]

DI

[DIO]

Receiver input: RXIN and RXIN are biphase-modulated
Manchester II bipolar inputs from MIL-STD-1553 data bus.

RXIN

1

(A)

RXIN

(B)

30 [2]

21 [8]

DI

[DIO]

DI

[DIO]

RXIN is the half-cycle complement of RXIN input.

NAME PIN

NUMBER

TYPE DESCRIPTION

V

CC

(A)

V

CC

(B)

33 [20]

24 [14]

PWR

PWR

+5 VDC power (±10%)

GND

(A)

GND

(B)

3, 7, 31

[3,19,21]

12, 16, 22

[9,13,15]

GND

GND

Ground reference

4

36

26

10
11

13
14
15

17
18

16

27

28

35
34
33
32
31

30
29

25
24
23

22
21
20
19

1
2

3
4

5
6
7

8
9

12

TXOUT

RXOUT

TXOUT

GND
NC
RXOUT

RXEN
GND

NC

TXOUT

RXOUT

TXOUT

GND
NC
RXOUT

RXEN
GND

NC

TXIN

RXIN

V

CC

TXIN
TXIHB

NC
GND

RXIN
NC

TXIN

RXIN

V

CC

TXIN
TXIHB

NC
GND

RXIN
NC

CHANNEL A

CHANNEL B

Figure 2a. Functional Pin Diagram -- Dual Channel (36)

24

17

7
8

10
11
12

18

23
22
21
20
19

16
15
14

13

1
2

3
4

5
6

9

CHA

CHA

GND
RXOUT

RXEN

CHB

CHB

GND
RXOUT

RXEN

TXIN

V

CC

TXIN
TXIHB

GND

TXIN

V

CC

TXIN
TXIHB

GND

CHANNEL A

CHANNEL B

Figure 2b. Functional Pin Diagram -- Dual Channel (24)

1

RXOUT

RXOUT

GND

GND

Note:

1.The 24-lead flatpack internally connects TXOUT to RXIN (CHA, CHB) and TXOUT to RXIN (CHA, CHB) for each channel.

5

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-STD­1553 data bus via a transformer driven from the TXOUT and
TXOUT terminals. Transmitter output terminals’ non­transmitting 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.

Table 1. Transmit Operating Mode

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.

Figure 3. Typical Transmitter

Wave

Figure 4. Typical Receiver Waveforms

TXIN TXIN TXIHB TXOUT

x

1

x 1

0 0 x
0 1 0
1 0 0
1 1 x

90%

10%

TXOUT, TXOUT

TXIN

TXIN

LINE-TO-LINE
DIFFERENTIAL
OUTPUT

TXIN

TXIHB

TXIN

t

TXDD

BOTH HIGH
OR
BOTH LOW

RXOUT

RXOUT

RXOUT

RXOUT

LINE-TO-LINE
DIFFERENTIAL
INPUT

t

RXDD

Off

2

Off

3

Off

3

On
On

6

DATA BUS INTERFACE

1

The designer can connect the UT63M14x to the data bus via a
short-stub (direct-coupling) connection or a long-stub
(transformer-coupling) connection. Use a short-stub connection
when the distance from the isolation transformer to the data bus
does not exceed a one-foot maximum. Use a long-stub
connection when the distance from the isolation transformer
exceeds the one-foot maximum and is less than twenty feet.
Figure 5 shows various examples of bus coupling
configurations. The UT63M14x series transceivers are designed
to function with MIL-STD-1553A and 1553B compatible
transformers.

Note:

1.The 24-lead flatpack internally connects TXOUT to RXIN and TXOUT to
RXIN for each channel.

RECOMMENDED THERMAL PROTECTION

All packages should mount to or contact a heat removal rail
located in the printed circuit board. To insure proper heat transfer
between the package and the heat removal rail, use a thermally­conductive material between the package and the heat removal
rail. Use a material such as Mereco XLN-589 or equivalent to
insure heat transfer between the package and heat removal rail.

Figure 8. Transceiver Test Circuit MIL-STD-1553B

Figure 5. Bus Coupling Configuration

55 OHMS

55 OHMS

20 FT MAX 1:1.4

Note:

ZO defined per MIL-STD-1553B, Section 4.5.1.5.2.1.

Z

O

Z

O

+5V DC OPERATION

1:1.79

1:2.5

SHORT-STUB
DIRECT COUPLING
1 FT. MAX.

LONG-STUB
TRANSFORMER COUPLING

.75 Z

O

.75 Z

O

TXOUT

RXIN

RXIN

TXOUT