ABE0113

Low EMI Spread Spectrum Multiplier Clock

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

3. TIMING CHARACTERISTICS

PARAMETERS

SYMBOL

CONDITIONS

MIN.

TYP.

MAX.

UNITS

Rise Time

Tr

Measured at 0.8V ~ 2.0V @ 3.3V

0.8

0.95

1.1

ns

Fall Time

Tf

Measured at 2.0V ~ 0.8V @ 3.3V

0.78

0.85

0.9

ns

Output Duty Cycle

DT

45

50

55

%

Input to Output Delay

2

4

ns

Cycle to Cycle Jitter

Tcyc-cyc

Over output frequency range @ 3.3V

100

ps

FUNCTIONAL DESCRIPTION

Selectable spread spectrum and modulation rates

The ABE0113 provides selectable multiplication factor, as well as selectable modulation rate. Selection is made by

connecting pins 2 (S2), 3 (S1), 4 (S0), and 7 (S3) to a logical “zero” or “one”, according to the output clock

selection table on 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 30k

Ω, pins 2 and 3 (S1 and S2) have an internal

pull-up resistor of 30k

Ω. This internal pull-down (or pull-up) resistor will pull the input value to a logical “zero” (or

“one” respectively) by default, i.e. when the pin is not connected to GND (VDD respectively). In order to override

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