ABE0111 Ver la hoja de datos (PDF) - Abracon Corporation

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Fabricante

ABE0111

Low EMI Spread Spectrum Multiplier Clock

Abracon Corporation 

3. TIMING CHARACTERISTICS

ABE0111

Low EMI Spread Spectrum Multiplier Clock

PARAMETERS

Rise Time

Fall Time

Output Duty Cycle

Input to Output Delay

Cycle to Cycle Jitter

SYMBOL

CONDITIONS

Tr

Measured at 0.8V ~ 2.0V @ 3.3V

Tf

Measured at 2.0V ~ 0.8V @ 3.3V

DT

Tcyc-cyc

Over output frequency range @ 3.3V

MIN.

0.8

0.78

45

2

TYP.

0.95

0.85

50

MAX.

1.1

0.9

55

4

100

UNITS

ns

ns

%

ns

ps

FUNCTIONAL DESCRIPTION

Selectable spread spectrum and modulation rates

The ABE0111 provides selectable spread spectrum modulation, as well as selectable modulation rate. Selection

is made by connecting specific pins to a logical “zero” or “one”, according to the output clock selection table and

modulation rate selection table on page 1.

Pins 2 (S2), 3 (S1), 4 (S0), and 7 (S3) are used as inputs to select the spread spectrum modulation and

multiplication factor as shown on the output clock selection table (page 1).

Default values for S(0:3) through internal pull-up and pull-down resistor

Selection pins S0 and S3 have an internal pull-down resistor of 30kΩ, pins 2 and 3 (S1 and S2) have an internal

pull-up resistor of 30kΩ. This internal pull-up (or pull-down) resistor will pull the input value to a logical “one” (or

“zero” respectively) by default, i.e. when no resistive load is connected between the pin and GND (VDD

respectively). In order to override the internal pull-up (pull-down), the pin has to be connected to GND (VDD

respectively).

30332 Esperanza., Rancho Santa Margarita, Ca 92688 Ph: 949-546-8000 Fax: 949-546-8001 www.Abracon.com 03/21/05 Page 4

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