Rainbow-electronics DS92LV010A Manual de usuario descargar pdf (Pagina 8)

Application Information (Continued)

•

Bypass each BLVDS device and also use distributed bulk

capacitance. Surface mount capacitors placed close to

power and ground pins work best. Two or three multi-

layer ceramic (MLC) surface mount capacitors (0.1 µF,

and 0.01 µF in parallel should be used between each V

and ground. The capacitors should be as close as pos-

sible to the V

pin.

•

Use the termination resistor which best matches the dif-

ferential impedance of your transmission line.

•

Leave unused LVDS receiver inputs open (floating)

TABLE 1. Functional Table

MODE SELECTED DE RE

DRIVER MODE H H

RECEIVER MODE L L

TRI-STATE MODE L H

LOOP BACK MODE H L

TABLE 2. Transmitter Mode

INPUTS OUTPUTS

DE DI DO+ DO−

HL LH

HH H L

0.8 X X

LX ZZ

L = Low state

H = High state

TABLE 3. Receiver Mode

INPUTS OUTPUT

(RI+)-(RI−)

LL(

−100 mV) L

LH(

+100 mV) H

L 100 mV

−100 mV X

HXZ

X = High or Low logic state

Z = High impedance state

L = Low state

H = High state

TABLE 4. Device Pin Description

Pin Name Pin # Input/Output Description

DIN 2 I TTL Driver Input

/RI

6, 7 I/O LVDS Driver Outputs/LVDS Receiver Inputs

OUT

3 O TTL Receiver Output

5 I Receiver Enable TTL Input (Active Low)

DE 1 I Driver Enable TTL Input (Active High)

GND 4 NA Ground

8 NA Power Supply

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