1
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
q Full military operating temperature range, -55°C to +125°C,
screened to QML Q or QML V requirements
q Standard Military Drawing available
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.
TXIN
RXOUT
RXEN
FROM ENCODER
TO DECODER
DRIVERS
COMPARE
FILTER
LIMITER
and
FILTER
TXIHB
Figure 1. Functional Block Diagram
RXIN
TXOUT
RXIN
TXOUT
RXOUT
TXIN
THRESHOLD
REFERENCE
