eroflex Circuit T

Features

• Performs Source and Sink functions

• Implements Type D & E protocols

• Burst Mode Capability

• Built in System Integrity Features

• Double Buffered Communications

• Low power CMOS

• Available in a PGA Package

• Operates over full Military temperature range -55°C to +125°C

General Description

The CT2500 provides a complete interface between the MIL-STD-1397 transceiver chip set (CT1698) and

most microprocessor based systems. The unit is monolithic and fabricated in CMOS technology, thereby

having very low power requirements. The unit handles all protocols of Type D & E interfaces including Burst

Mode Data and forced EF functions. Screened per individual test methods of MIL-STD-883. Aeroflex Circuit

CIRCUIT TECHNOLOGY

www.aeroflex.com

CT2500

MIL-STD-1397 Type D & E Low Level Serial

F

I

E

I

D

C

E

R T

F

L E

X L A

ISO

9001

Figure 1 – Block Diagram

Interface Protocol Chip

RCVDATA

RCVCNTRL

ERR1

ERR2

OVRFLOW

SYNCIN

WIIN

PRTYIN

Received Data Shift Register

CMDIN

CFRMSYNC

DTAIN

BIT4IN

Received SOS/SIS

STR1

STR2

FIFORD

RDYFORDTA

G20MHZ

TXDMXD

TXCMXD

ENV

TXSELECT

BIT4OUT

DTAOUT

WIOUT LDCNTRL

CMDOUT

CLK

SO/SI

PAREN

POE

BURST

FIFOEN

D/E

POR

TEST

D0 - D31

32 BIT BIDIRECTIONAL

PARALLEL DATA BUS

XMIT Data Latch

XMIT Data Shift Register

Received Data Latch

SOS/SIS

for XMIT

Check

Logic

Serial

Contrl

Serial

Mode

Control

Logic

I/O

Input

RXCLOCK

Output

RXDATA

RSTERR