GS4915_09 Datasheet, PDF (8/27 Pages) Gennum Corporation – ClockCleaner

Table 1-1: Pin Descriptions (Continued)
Pin
Number
36
Name
LF
37
CP_RES
38
CP_VDD
39
VCO_VDD
–
Ground Pad
Timing
Analog
Analog
–
–
–
Type Description
Outpu
t
Control voltage for the external voltage controlled oscillator. Connect
to pin 5 of the GO1555 via a low pass filter. See Typical Application
Circuit on page 22.
Input
Charge pump current control.
Connect to VCO_GND via a 10kΩ resistor.
Power Power supply for the internal charge pump block (nominally +2.5V
DC). Connect to VCO_VDD (pin 39).
Power
Power supply for the external voltage controlled oscillator (+2.5V DC).
Connect to pin 7 of the GO1555. This pin is an output.
Must be isolated from all other power supplies.
Power Ground pad on bottom of package must be soldered to AGND plane
of PCB.
GS4915 ClockCleaner™
Data Sheet
39145 - 5
June 2009
8 of 27