BUS-855943L datasheet, PDF - EEWORLD Datasheet

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BUS-855943L: DescriptionTelecom IC; CategoryWireless rf/communication Telecom circuit; File Size55KB，4 Pages; ManufacturerData Device Corporation

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BUS-855943L Overview

Telecom IC

BUS-855943L Parametric

Parameter Name	Attribute value
package instruction	,
Reach Compliance Code	unknown
Base Number Matches	1

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BUS-8559

VARIABLE OUTPUT

MIL-STD-1553 TRANSCEIVER

FEATURES

coupled to the data bus with the spec-

ified transformer*, and isolated (on the

data side) with two 55

Ω

fault isolation

resistors, and loaded with two 70

Ω

terminations

(plus

additional

receivers), the data bus signal pro-

duced is a nominal 0 to 7.5 V pk-pk

when measured at the output side of

the 55

Ω

resistors.

When both DATA and DATA, inputs

are held low or high, the transmitter

presents a high impedance to the

line. An external inhibit input is also

provided, which allows the the trans-

mitter output to be removed from the

line.. When a logic “1” is applied to the

TX INHIBIT input, the transmitter is

disabled, and the data inputs are

ignored.

DESCRIPTION

Designed specifically for use in auto-

matic test equipment where a variable

transmitter output level is required,

the DDC Model BUS-8559 transceiv-

er is a complete transmitter and

receiver conforming to MIL standards

1553A and 1553B.

The receiver section accepts phase-

modulated bipolar data at the input

and produces a bi-phase TTL signal

at the output, see FIGURE 1.

Outputs, DATA and DATA, are posi-

tive and negative excursions of the

input beyond an internally fixed

threshold. The positive and negative

thresholds are internally set at the

factory for a nominal 1 V pk-pk signal,

when measured at point “A” in FIG-

URE 2. An external strobe input is

provided which allows the the receiv-

er to be removed from the line. A logic

“0” applied to RECEIVER STROBE

will disable the receiver output.

The BUS-8559 transmitter section

accepts bi-phase TTL data at the

input and produces a nominal 0 to 27

V pk-pk differential output across a

145

Ω

load. When the transmitter is

•

Variable Transmitter Output

•

Transmitter/Receiver in a Single

24-Pin DDIP Hybrid

•

Very Low Power Dissipation

•

Improved Receiver Filtering

Enhances System Bit Error Rate

•

Meets MIL-STD-1553A and 1553B

•

Power Supplies:

±15 V or

+15 V and -12 V

APPLICATION

The BUS-8559 is suitable for any

MIL-STD-1553 application which

requires a transceiver. The BUS-8559

comes in a hermetic, 24-pin DDIP

package which measures 1.4 x 0.8 x 0.2

inches.

-15

+15

VAR VCC

(O to +15 V)

BUS-8559

TRANSCEIVER

COMPARATOR

RECEIVER

STROBE

RX DATA

LIMITER

FILTER

RX DATA

COMPARATOR

SHAPING

NETWORK

DRIVER

DATA

SHAPING

NETWORK

TX DATA

TX INHIBIT

TX DATA

BUS-25679

TRANSFORMER

DATA

DRIVER

BUS-8559 BLOCK DIAGRAM

1999 Data Device Corporation

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