GS1560A/GS1561 Data Sheet
Table 1-1: Pin Descriptions (Continued)
Pin
Name
Timing
Type
Description
Number
76
VCO_VCC
–
Output
Power
Power supply for the external voltage controlled oscillator. Connect to pin 7
of the GO1525. This pin is an output.
Should be isolated from all other power supplies.
77
78
79
80
LF
Analog
Analog
Analog
–
Output
Input
Control voltage to external voltage controlled oscillator. Nominally +1.25V
DC.
CP_CAP
LB_CONT
CP_GND
PLL lock time constant capacitor connection. Normally connected to
VCO_GND through 2.2nF.
Input
Control voltage to set the loop bandwidth of the integrated reclocker.
Normally connected to VCO_GND through 40kΩ.
Power
Ground connection for the charge pump. Connect to analog GND.
27360 - 8 September 2005
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