GS1575A / GS9075A Data Sheet
Table 1-1: Pin Descriptions (Continued)
Pin Number
36
38, 40
Name
DDO_MUTE
SCO, SCO
Type
Logic Input
Output
Description
Mutes the DDO/DDO outputs. This option is not available in bypass mode.
Serial clock output.
When SCO_ENABLE is set HIGH, a serial digital differential clock will be
presented to the application layer at the selected data rate.
39, 45, 54 - 59
41
NC
VCC_SCO
No Connect
Power
Not connected internally.
Most positive power supply connection for the SCO/SCO output driver.
Connect to 3.3V.
42
VEE_SCO
Power
Most negative power supply connection for the SCO/SCO output driver.
Connect to GND.
43
44, 46
47
GND_DRV
DDO, DDO
VCC_DDO
Passive
Output
Power
Recommended connect to GND.
Differential Serial Digital Outputs.
Most positive power supply connection for the DDO/DDO output driver.
Connect to 3.3V.
48
VEE_DDO
Power
Most negative power supply connection for the DDO/DDO output driver.
Connect to GND.
50, 51
52, 53
60
XTAL_OUT+,
XTAL_OUT-
XTAL+, XTAL-
VEE_CP
Output
Input
Power
Differential outputs of the reference oscillator used for monitoring or test
purposes.
Reference crystal input. Connect to the GO1535 as shown in the
Most negative power supply connection for the internal charge pump.
Connect to GND.
61
VCC_CP
Power
Most positive power supply connection for the internal charge pump.
Connect to 3.3V.
62, 63
–
LF+, LF-
Center Pad
Passive
–
Loop filter capacitor connection. Connect as shown in the
Ground pad on bottom of package.
Solder to main ground plane following recommendations under
34716 - 0
December 2005
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GENNUM [ GENNUM CORPORATION ]
