Standard Products
UT63M1XX MIL-STD-1553A/B BusTransceiver
Data Sheet
Sept. 1999
FEATURES
qFull conformance to MIL-STD-1553A and 1553B
qCompletely monolithic bipolar technology
qLow power consumption
qFit and functionally compatible to industry standard 631XX series
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.
q Idle low encoding version |
The receiver section of the UT63M1XX series accepts biphase- |
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modulated Manchester II bipolar data from a MIL-STD-1553 |
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qFlexible power supply voltages: V CC=+5V, V EE=-12V or - |
data bus and produces TTL-level signal data at its RXOUT and |
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RXOUT outputs. An external RXEN input enables or disables |
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15V, and V CCA=+5V to +12V or +5V to +15V |
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the receiver outputs. |
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q Full military operating temperature range, -55°C to +125°C, |
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screened to QML Q or QML V requirements |
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q Standard Military Drawing available |
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RXEN |
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RXOUT |
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RXIN |
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FILTER |
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FILTER |
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TO DECODER |
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and |
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RXIN |
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LIMITER |
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RXOUT |
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THRESHOLD |
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DRIVERS |
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REFERENCE |
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TXOUT |
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TXIN |
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COMPARE
FROM ENCODER
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TXOUT |
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TXIN |
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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 42VPP, 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 dualchannel (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
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NAME |
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PACKAGE |
PIN |
TYPE |
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DESCRIPTION |
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SINGLE |
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DUAL |
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TXOUT |
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1 |
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DO |
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Transmitter outputs: TXOUT and |
TXOUT |
are differential data signals. |
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(A) |
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TXOUT |
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N/A |
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10 |
DO |
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(B) |
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TXOUT |
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2 |
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DO |
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is the complement of TXOUT. |
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TXOUT |
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(A) |
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N/A |
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11 |
DO |
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TXOUT |
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(B) |
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TXIHB |
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34 |
TI |
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Transmitter inhibit: this is an active high input signal. |
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(A) |
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TXINB |
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N/A |
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25 |
TI |
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(B) |
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TXIN |
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22 |
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35 |
TI |
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Transmitter inputs: TXIN and |
TXIN |
are complementary TTL-level |
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(A) |
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Manchester II encoder inputs. |
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TXIN |
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N/A |
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TI |
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(B) |
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TXIN |
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36 |
TI |
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TXIN |
is the complement of TXIN input. |
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(A) |
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N/A |
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27 |
TI |
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TXIN |
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(B) |
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2
RECEIVER
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PACKAGE |
PIN |
TYPE |
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DESCRIPTION |
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SINGLE |
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DUAL |
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RXOUT |
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7 |
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5 |
TO |
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Receiver outputs: RXOUT and |
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are complementary |
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RXOUT |
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(A) |
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Manchester II decoder outputs. |
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RXOUT |
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N/A |
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14 |
TO |
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(B) |
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RXOUT |
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10 |
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8 |
TO |
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is the complement of RXOUT output |
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RXOUT |
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(A) |
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N/A |
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TO |
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RXOUT |
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(B) |
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RXEN |
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8 |
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6 |
TI |
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Receiver enable/disable: This is an active high input signal. |
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(A) |
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RXEN |
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N/A |
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15 |
TI |
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(B) |
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RXIN |
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15 |
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29 |
DI |
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Receiver inputs: RXIN and |
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are biphase-modulated Manchester |
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RXIN |
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(A) |
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II bipolar inputs from MIL-STD-1553 data bus. |
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RXIN |
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N/A |
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20 |
DI |
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(B) |
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RXIN |
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16 |
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30 |
DI |
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RXIN |
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(A) |
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N/A |
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21 |
DI |
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RXIN |
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(B) |
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POWER AND GROUND |
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PACKAGE |
PIN |
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DESCRIPTION |
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SINGLE |
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DUAL |
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VCC |
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20 |
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33 |
PWR |
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+5VDC power (±10%) |
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(A) |
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VCC |
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N/A |
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24 |
PWR |
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(B) |
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VCCA |
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13 |
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28 |
PWR |
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+5 to +12VDC power or |
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(A) |
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+5 to +15VDC power (± 5%) |
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VCCA |
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N/A |
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PWR |
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(B) |
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VEE |
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19 |
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32 |
PWR |
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-12 or -15VDC power (± 5%) |
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(A) |
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Recommended de-coupling capacitors 4.7μF and.1μF |
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VEE |
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N/A |
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23 |
PWR |
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(B) |
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GND |
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3, 9, 18 |
3, 7, 31 |
GND |
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Ground reference |
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GND |
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N/A |
12, 16, 22 |
GND |
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(B) |
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3
TXOUT |
1 |
24 |
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2 |
23 |
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TXOUT |
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TXIN |
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GND |
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3 |
22 |
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TXIN |
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NC |
4 |
21 |
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TXIHB |
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NC |
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5 |
CHANNEL 20 |
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VCC |
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NC |
6 |
A |
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19 |
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VEE |
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RXOUT |
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7 |
18 |
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GND |
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RXEN |
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8 |
17 |
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NC |
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GND |
9 |
16 |
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RXIN |
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10 |
15 |
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RXIN |
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RXOUT |
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NC |
11 |
14 |
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NC |
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NC |
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12 |
13 |
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VCCA |
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Figure 2a. Functional Pin Diagram--Single Channel
TXOUT |
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1 |
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36 |
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TXIN |
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TXOUT |
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2 |
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35 |
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TXIN |
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GND |
3 |
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34 |
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TXIHB |
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NC |
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4 |
CHANNEL 33 |
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VCC |
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5 |
A |
32 |
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RXOUT |
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VEE |
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RXEN |
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6 |
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31 |
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GND |
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GND |
7 |
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30 |
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RXIN |
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8 |
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29 |
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RXIN |
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RXOUT |
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NC |
9 |
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268 |
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VCCA |
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10 |
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27 |
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TXOUT |
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TXIN |
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11 |
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26 |
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TXIN |
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TXOUT |
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GND |
12 |
CHANNEL |
25 |
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TXIHB |
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NC |
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13 |
24 |
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VCC |
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B |
23 |
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RXOUT |
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VEE |
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RXEN |
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RXOUT |
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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’ 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.
Models UT63M105, UT63M107, UT63M125, and UT63M127 idle in the “0” state when disabled or receiving no signal.
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.
TXIN |
BOTH HIGH |
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OR |
TXIN |
BOTH LOW |
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TXIHB
LINE-TO-LINE
DIFFERENTIAL 90%
OUTPUT
TXOUT, TXOUT |
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10% |
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TXIN
TXIN
tTXDD
Figure 3. Typical Transmitter Waveforms
Table 1. Transmit Operating Mode
TXIN |
TXIN |
TXIHB |
TXOUT |
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x1 |
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1 |
Off 2 |
0 |
0 |
x |
Off 3 |
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1 |
0 |
On |
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0 |
0 |
On |
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1 |
x |
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
DATA BUS INTERFACE
The designer can connect the UT63M1XX 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-five feet. Figure 5 shows various examples of bus coupling configurations. The UT63M1XX series transceivers are designed to function with MIL-STD-1553A and 1553B compatible transformers.
RECOMMENDED THERMAL PROTECTION
All packages, single and dual, 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 thermally conductive 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.
LINE-TO-LINE
DIFFERENTIAL
INPUT
RXOUT
RXOUT QUIESCENT IDLE LOW
RXOUT
RXOUT
tRXDD
Figure 4. Typical Receiver Waveforms
Table 2. Transceiver Model Capabilities
MODEL |
VCC |
VEE |
VCCA |
IDLE |
UT63M105 |
+5V |
-15V |
+5 to +15V |
Low |
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UT63M107 |
+5V |
-12V |
+5 to +12V |
Low |
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UT63M125 |
+5V |
-15V |
+5 to +15V |
Low |
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UT63M127 |
+5V |
-12V |
+5 to +12V |
Low |
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6
± 15VDC
OPERATION
± 12VDC
OPERATION
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SHORT-STUB |
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DIRECT COUPLING |
55 OHMS |
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55 OHMS |
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TRANSFORMER COUPLING |
.75ZO |
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2:1 |
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20 FT MAX 1:1.4 |
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SHORT-STUB
DIRECT COUPLING
1.2:1 |
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1 FT MAX |
55 OHMS |
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LONG-STUB
TRANSFORMER COUPLING
1.66:1 |
20 FT MAX 1:1.4 |
.75ZO |
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.75ZO
Note: |
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ZO defined per MIL-STD-1553B in section 4.5.1.5.2.1. |
ZO |
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Figure 5. Bus Coupling Configuration |
7