ICS843404 datasheet(13/19 Pages) ICST

tên linh kiện	ICS843404

Giải thích chi tiết về linh kiện	LVCMOS/CRYSTAL-TO-3.3V LVPECL AND LVDS CLOCK GENERATOR

PDF	19 Pages

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nhà sản xuất	ICST [Integrated Circuit Systems]

Trang chủ	http://www.icst.com

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13 / 19 page

843404AG

www.icst.com/products/hiperclocks.html

REV. A OCTOBER 17, 2005

Integrated

Circuit

Systems, Inc.

ICS843404

LVCMOS/CRYSTAL-TO-3.3V LVPECL AND

LVDS CLOCK GENERATOR

TERMINATION FOR 2.5V LVPECL OUTPUT

Figure 5A and Figure 5B show examples of termination for 2.5V

LVPECL driver. These terminations are equivalent to terminat-

ing 50

Ω to V

DD - 2V. For VDDO = 2.5V, the VDDO - 2V is very close to

ground level. The R3 in Figure 5B can be eliminated and the

termination is shown in Figure 5C.

FIGURE 5C. 2.5V LVPECL TERMINATION EXAMPLE

FIGURE 5B. 2.5V LVPECL DRIVER TERMINATION EXAMPLE

FIGURE 5A. 2.5V LVPECL DRIVER TERMINATION EXAMPLE

62.5

250

2.5V

VDDO=2.5V

Zo = 50 Ohm

250

2,5V LVPECL

Driv er

62.5

2.5V

Zo = 50 Ohm

VDDO=2.5V

2,5V LVPECL

Driv er

2.5V

Zo = 50 Ohm

VDDO=2.5V

2.5V

2,5V LVPECL

Driv er

Zo = 50 Ohm

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