Functional Description and Pinout
Pin
#
Load or
Drive
Pin Name
Function
1
2
3
No connection
No connection
XFMR secondary/
RX data input
Transmitter-receiver I/O pin
4
5
6
7
8
9
Test Point
Test Point
Test Point
-5 Volts
No connection permitted
No connection permitted
No connection permitted
R strobe
Low level disables receiver
3 S loads
X
Power management
input
Controls transmitter power consumption in conjunction with pin 10 1 S load
10 Encoder enable
11 Case/signal GND
12 Case/signal GND
Controls transmitter power consumption in conjunction with pin 9 1 S load
13 Decoded data
envelope
High after reception of first half bit; goes low after reception of last 4 S drive
half bit (normally low in inactive state)
14 TP3 test point
15 TP1 test point
16 TP2 test point
17 -5 Volts
Alignment point: no electrical connection permitted
Alignment point: no electrical connection permitted
Alignment point: no electrical connection permitted
18 TP4 test point
Alignment point: no electrical connection permitted
19 Clock
Reconstructed clock; one clock pulse per input bit received
3 S drive
3 S drive
R
20 No connection
21 Decoded Data
22 No connection
23 +5 volts
NRZ reconstructed data. Sampled on clock rising edge
R
R
24 +5 volts
25 10 MHz encoder shift One cycle required per data bit. Must be high in first half of bit cell 1 S load
clock
26 NRZ serial input data Serial input to be Manchester encoded with the 20 MHz gated CK 1 S load
27 Encode envelope
Must be high to enable transmission; must go low before reception 1 S load
of last 20 MHz positive edge to complete transmission
28 20 MHz gated clock
(encoder)
Each bit to be encoded requires two positive edges of the 20 MHz 1 S load
CK. These edges must occur at 25ns and 75ns into the bit cell.
The end of transmission requires an additional edge in conjunction
with a logic low on the encode envelope. t , t < 5nsec.
R
F
29 Master reset
Logic low resets encoder
2 S load
reset pulse <15 nsec
30 No connection
31 No connection
32 XFMR secondary/
RX DATA input
Transmitter-Receiver I/O pin
33 XFMR secondary
Secondary isolated winding, same phase as outer conducter
Transformer lead for connection to outer conductor of tri-axial
34 XFMR primary/
TX DATA output
5
Aeroflex Circuit Technology
SCDCT1815 REV A 6/12/98 Plainview NY (516) 694-6700
AEROFLEX [ AEROFLEX CIRCUIT TECHNOLOGY ]
