b

Symbol

Parameter

Conditions

Min

Max

Units

Modulus Set-Up Time

DS8615 DS8616

65

ns

(Notes 4 and 5)

AC Input Resistance

100 MHz and 50 mVrms

10

kX

Input Capacitance

100 MHz and 50 mVrms

3

10

pF

Note 1

‘‘Absolute Maximum Ratings’’ are those values beyond which the safety of the device cannot be guaranteed Except for ‘‘Operating Temperature Range’’

they are not meant to imply that the devices should be operated at these limits The table of ‘‘Electrical Characteristics’’ provides conditions for actual device

operation

Note 2

Unless otherwise specified minmax limits apply across the

Note 3

All currents into device pins are shown as positive out of device pins as negative all voltages referenced to ground unless otherwise noted All values

shown as max or min on absolute value basis

Note 4

the period of time the modulus control level must be defined prior to the positive transition of the prescaler output to ensure proper modulus

selection

Note 5

See Timing Diagrams

Timing Diagram

TLF5240 3

The logical state of the modulus control input just prior to the output’s rising edge will determine the modulus ratio of the device

HI conditions

Typical Applications

TLF5240 4

TLF5240 5

Schematic Diagrams

TLF5240 6

TLF5240 7

TLF5240 8

3