SY100ELT28 Просмотр технического описания (PDF) - Micrel

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SY100ELT28

5V TTL-TO-DIFFERENTIAL PECL AND DIFFERENTIAL PECL-TO-TTL TRANSLATOR

Micrel 

Micrel

TERMINATION RECOMMENDATIONS

+5.0V

+5.0V

R1

ZO = 50Ω 82Ω

ZO = 50Ω

R2

130Ω

R1

82Ω +5.0V

R2

130Ω Vt = VCC —2V

Figure 1. +5V PECL Parallel Termination–Thevenin Equivalent

+5.0V

source

Z = 50Ω

+5.0V

Z = 50Ω

50Ω 50Ω

destination

Rb

Figure 2. +5V PECL Three-Resistor “Y–Termination”

Notes:

1. Power-saving alternative to 4-resistor, Thevenin termination.

2. Place termination resistors as close to destination inputs as possible.

3. Rb resistor sets the DC bias voltage, equal to Vt. For 5.0V supply, Rb value is 110Ω.

SY10ELT28

SY100ELT28

5

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