Aeroflex Circuit Technology

SCDCT1698 REV A 6/12/98 Plainview NY (516) 694-6700

5

Drive Level Control Pins

Level. If pins 5 and 6 are left open the CT1698 operates within the MIL-STD-1397 Type E specification.

transmitter output offset level.

is:

The formula for peak to peak transmitter output swing with resistors connected between pins 5 and 6 to

ground is:

Functional Description and Pinout

Pin

#

Pin Name

Function

Load or

Drive

1

XFMR primary/

TX data output

Transformer lead for connection to center conductor of tri-axial

cable

2

XFMR secondary

Secondary isolated winding, same phase as center conductor

3

TXDATA output/

RX data input

Transmitter-receiver I/O pin (usually connected to pin 2)

4

No connection

5

Drive 2

6

Drive 1

7

-5 Volts

8

Low level disables receiver

3 S loads

9

Power management

input

Controls transmitter power consumption in conjunction with pin 10

1 S load

10

Encoder enable

Controls transmitter power consumption in conjunction with pin 9

1 S load

11

Case/signal GND

12

Case/signal GND

13

Decoded data

envelope

High after reception of first half bit; goes low after reception of last

half bit (normally low in inactive state)

4 S drive

14

TP3 test point

Alignment point: no electrical connection permitted

15

TP1 test point

Alignment point: no electrical connection permitted

16

TP2 test point

Alignment point: no electrical connection permitted

17

-5 Volts

18

TP4 test point

Alignment point: no electrical connection permitted

19

Reconstructed clock; one clock pulse per input bit received

3 S drive

20

No connection

21

3 S drive

= 1.39 + 125 ± 15% Volts,

pk-pk

pk-pk