eroflex Circuit T

Features

• Optional transformer isolation

• Internally set threshold

• Matched to 50 ohm system impedance power on and off

• Operates with ±5 volt supplies

• Power management

• External output level adjustment

• Accepts synchronous input data

• Unique Manchester decoder requires no clock

• Generates one clock per received bit

• May be used for serial decoding of indefinite word lengths

• Interfaces directly to the CT2500 protocol device

• Other Wire and Fiber Optic types available

General Description

CT1698 is a single hybrid microcircuit which incorporates a serial encoder, transceiver, and Manchester decoder in one package.

The encoder accepts serial NRZ data in conjunction with two synchronous clocks. The CT1698 receiver section accepts bipolar

Manchester encoded signals and passes level detected signals to the serial decoder. The CT1698 has a power management function

and a variable drive level option. The transmitter standby mode is available to reduce the overall power consumption of the CT1698.

The variable drive level output is externally programmable for testing purposes. Aeroflex Circuit Technology is a 80,000 square foot

MIL-PRF-38534 certified facility in Plainview, N.Y.

CIRCUIT TECHNOLOGY

www.aeroflex.com

Low Level Serial Interface

CT1698

MIL-STD-1397 Type E 10MHz

F

I

E

I

D

C

E

R T

F

L E

X L A

ISO

9001

Serial

Manchester

Encoder

Power

Management

Manchester

Decoder

and

Clock Regeneration

Data

Reconstruction

Serial NRZ Data

10 MHz Shift Clock

20 MHz Gated Clock

Envelope

Master Reset

Encoder Enable

Power Management

Decoded Data Envelope

Rx Strobe

XFMR SEC/DATA Input

Primary

Output

+5V

XFMR SEC/DATA Input

Drive 2

Drive 1

Data

Primary

Output

Data

XFMR SEC

XFMR SEC

Figure 1 – Block Diagram