ICS853014BGL datasheet(9/19 Pages) IDT

Numer części	ICS853014BGL

Szczegółowy opis	LOW SKEW, 1-TO-5, DIFFERENTIAL-TO- 2.5V, 3.3V LVPECL/ECL FANOUT BUFFER

PDF	19 Pages

Scroll/Zoom	100%

Producent	IDT [Integrated Device Technology]

Strona internetowa	http://www.idt.com

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9 / 19 page

ICS853014

LOW SKEW, 1-TO-5, DIFFERENTIAL-TO-2.5V, 3.3V LVPECL/ECL FANOUT BUFFER

IDT™ / ICS™ 2.5V, 3.3V LVPECL/ECL FANOUT BUFFER

ICS853014BG REV. DNOVEMBER 12, 2007

Parameter Measurement Information, continued

Setup and Hold Time

Application Information

Wiring the Differential Input to Accept Single Ended Levels

Figure 2 shows how the differential input can be wired to accept

single ended levels. The reference voltage V_REF = VCC/2 is

generated by the bias resistors R1, R2 and C1. This bias circuit

should be located as close as possible to the input pin. The ratio of

R1 and R2 might need to be adjusted to position the V_REF in the

center of the input voltage swing. For example, if the input clock

swing is only 2.5V and VCC = 3.3V, V_REF should be 1.25V and

R2/R1 = 0.609.

Figure 2. Single-Ended Signal Driving Differential Input

HOLD

SET-UP

PCLKx

Single Ended Clock Input

VCC

PCLKx

nPCLKx

0.1u

V_REF

ICS853014BGL Arkusz danych(PDF) 9 Page - Integrated Device Technology