eroflex Circuit T

Features

• Performs the Complete Dual-Redundant Remote Terminal, Bus Controller Protocol

and Passive Monitor Functions of MIL-STD-1553B

• Automated Self-Test Functions

• Allows setting of the Message Error Bit on illegal commands

• Provides programmable control over Terminal Flag and Subsystem Flag Status Bits

• MIL-PRF-38534 Compliant Circuits Available

• 50 mw Typical Power Consumption

• Small Size

• Available in Ceramic Plug-in Package Configuration

• Compatible with all ACT Driver/Receiver Units

• 5V DC Operation

• Full Military (-55°C to +125°C) Temperature Range

• DESC SMD# 5962–94775: Released CT1990, Pending CT1991

1

General Description

The CT1990/1 Series is a monolithic implementation of the MIL-STD-1553B Bus Controller, Remote

Terminal and Passive Monitor functions. All protocol functions of MIL-STD-1553B are incorporated and a

number of options are included to improve flexibility. These features include programming of the status

word, illegalizing specific commands and an independent loop back self-test which is initiated by the

subsystem. This unit is directly compatible with all transceivers and microprocessor interfaces such as the

CT1611 and CT1800 produced by Aeroflex Incorporated.

Encoder

Decoder

"O"

Decoder

"1"

Driver

Select

&

Enable

BUS "0"

BUS "1"

T/R

Hybrid

T/R

Hybrid

Internal

Highway

Control

Interface

Unit

Program

Sub Address

&

Word Count

Outputs

Discrete

Outputs

Control

Inputs

Terminal

Address

Inputs

Block Diagram (With Transformers)

CIRCUIT TECHNOLOGY

CT1990/1

MIL-STD-1553B Remote Terminal, Bus Controller,

or Passive Monitor Hybrid with Status Word Control

CT1990/1 Series

Inputs

Status

Word

Control