BU-6 5 1 4 2 a n d BUS -6 5 1 4 2 S ERIES
MIL-S TD-1 5 5 3 DUAL REDUNDANT
REMOTE TERMINAL HYBRID
DESCRIPTION
FEATURES
The BUS-65142 Series is a com- Error detection and recovery are
plete dual redundant MIL-STD- enhanced by BUS-65142 Series
1553 Remote Terminal Unit (RTU) special features. A 14-bit built-in-
packaged in a small 1.9" x 2.1" test word register stores RTU infor-
hybrid. The device is based upon mation, and sends it to the Bus
two DDC custom ICs, which Controller in response to the Mode
includes two monolithic bi-polar low Command Transmit Bit Word. The
power transceivers and one CMOS BUS-65142 Series performs contin-
protocol containing data buffers uous on-line wraparound self-test,
and timing control logic. It supports and provides four error flags to the
all 13 mode codes for dual redun- host CPU. Inputs are provided for
dant operation, any combinaion of host CPU control of 6 bits of the
Complete Intergrated Remote
Terminal Including:
–Dual Low-Power Transceivers
–Complete RT Protocol
•
Direct Interface to Systems With
No Processor
•
•
•
•
Tolerant Version
Radiation
Available
which can be illegalized.
RTU Status Word.
Space Qualified Version
Available
Parallel data transfers are accom- Its small hermetic package, -55°C
plished with a DMA type handshak- to +125°C operating temperature
ing, compatible with most CPU range, and complete RTU operation
types. Data transfers to/from mem- make the BUS-65142 ideal for most
ory are simplified by the latched MIL-STD-1553 applications requir-
command word and word count out- ing hardware or microprocessor
High Reliability Screening
Available
puts.
subsystems.
ENCODER/
DECODER
DATA
BUS A
BIT
BUFFER
TRANSCEIVER
DB0-DB15
BUF ENA
PROCESSOR
DTREQ
DTGRT
DTACK
DTSTR
R/W
TRANSFER
CONTROLS
WATCHDOG
TIMEOUT
CURRENT
WORD
COUNTER
ENCODER/
DECODER
DATA
BUS B
BIT
TRANSCEIVER
PROCESSOR
M
U
X
A0-A4
PROTOCOL
SEQUENCER
AND
CONTROL
LOGIC
COMMAND
LATCH
A5-A10
DAT/CMD
ILL CMD (ME)
SS REQ
RT ADDRESS
+
PARITY
STATUS
ADBC
RT FLAG
SS BUSY
SS FLAG
REGISTER
16 MHz CLOCK
MESS ERR
RT FAIL
ERROR FLAGS
TIMING FLAGS
HS FAIL
RTADD ERR
NBGT
INCMD
BITEN
STATEN
GBR
DDC CUSTOM CHIP
FIGURE 1. BUS-65142 SERIES BLOCK DIAGRAM
1988, 1999 Data Device Corporation
©