eroflex Circuit Technology – Data Bus Modules For The Future © SCD2412 REV C 10/19/98
Features
• PERFORMS FUNCTIONS COMMON TO MIL-STD-1553
• ENCODE
• DECODE
• ADDRESS RECOGNITION
• THREE STATE PARALLEL I/O
• SELF TEST CAPABILITY
• MIL-PRF-38534 COMPLIANT CIRCUITS AVAILABLE
• SMALL SIZE – REPLACEMENT FOR DDC8937 MODEL NUMBER
• 5V DC OPERATION
• FULL MILITARY (-55°C TO +125°C) TEMPERATURE RANGE
1
General Description
The Aeroflex Circuit Technology Model ARX2412 Manchester Converter is a self contained, 48pin,
triple-in-line hybrid package designed to perform: encode, decode, logic and control functions in a
MIL-STD-1553, A and B multiplex data system. It Provides the necessary interface between transceivers and
a three state parallel 16 bit bus of the protocol logic section of a subsystem remote terminal or controller.
Figure 1 – FUNCTIONAL BLOCK DIAGRAM
Data Terminal Manchester Converter
ARX2412
for MIL-STD-1553
BITS 5-15
BITS 0-4
BITS 0-4
CLK
3 STATE ENABLE
AND BUFFER
3 STATE LATCHES
3 STATE OUT
3 STATE IN
AND BUFFER
3 STATE LATCHES
3 STATE ENABLE
PARALLEL
SHIFT
TO SERIAL
REGISTER
RESET
SERIAL
CLOCK
ENABLE
SERIAL TO
SHIFT
PARALLEL
REGISTER
SERIAL
CLOCK
DATASERIALOUT
CLK
IN VALIDWORD
DECODER
INRX DATA
CLK1
SYNC
RECEIVER
SECTION
BUSY
OUTPUT
RX DATA
12MHZ
CLOCK 1
INPUT12MHZ
CLOCK 2
INPUT12MHZ
CLOCK
SELECT
CLOCK
LOGIC
SELECT
CLK
BUSY
ENCODER
IN
SYNC
ENABLE
OUT
OUT
CLK
ADDRESS
REGISTER
RECOGNITION VALID
REGISTER
ADDRESS
VALID
POC POWER ON CLEAR
RECEIVER SYNC TYPE
BUSY RECEIVE
OWN ADDRESS 5 BITS
COMMAND SYNC CLEAR
(ADDRESS REGISTER CLEAR)
VU INT
(VALID ADDRESS)
SACK
(SYSTEM ACKNOMLEDGE)
TO / FROM 16 BIT PARALLEL BUS
BITS DB0 - DB15
OSEL
(OUTPUT SELECT)
TRANSMITTER BUSY
SYNC SELECT
ENCODER ENABLE
VALID WORD
FI EI D
CE
R T
AE
RO
F L E
X L AB
S
IN
C.ISO
9001
TRANSMITTER
SECTION
TX DATA
TX DATA
DATA
5 BITS
MSB - LSB16 BITS
B0-B4, MSB-LSB
SERIAL
VALID
REGISTER
WORD