CT1999 datasheet(10/25 Pages) AEROFLEX

10 / 25 page

Aeroflex Circuit Technology

SCDCT1999 REV B 8/14/01 Plainview NY (516) 694-6700

BUF INH

SINK

Buffer Inhibit - A low on this line causes the Buffered Signals to assume a

high impedance state.

IH ENA

SINK

Internal Highway Enable - A low on this line enables the Internal Highway

transceiver to transmit or receive data which is controlled by the IH DIR Line.

IH DIR

SINK

Internal Highway Direction - Controls the direction of data through the

Internal Highway Transceiver.

High = To Subsystem

Low = From Subsystem

RX DATA 0/1

SINK

Positive Date In. This should be a TTL description of the positive, half of the

Manchester code data on the bus. It should be driven to a logic level “1” when

a predetermined positive threshold is exceeded on the bus.

RX DATA 0/1

SINK

Negative Data In. This should be a TTL description of the negative half of the

Manchester code data on the bus. It should be driven to a logic level “1” when

a predetermined negative threshold is exceeded on the bus.

TX INHIBIT 0/1

SOURCE

Transmitter Enable. Goes low when the transmitter is transmitting. Should be

used to enable the bus drivers.

TX DATA

SOURCE

Positive Data Out - When this signal goes high the bus should be driven

positive.

Pin Description (Cont.)

Signal

Hybrid

Sink or Source

Signal Description

CT1999 Datasheet(PDF) 10 Page - Aeroflex Circuit Technology