GS4915 Datasheet, PDF (6/26 Pages) Gennum Corporation – ClockCleaner™

GS4915 Data Sheet
Table 1-1: Pin Descriptions (Continued)
Pin
Name
Number
Timing
18
DOUBLE
Non
synchronous
19
SKEW_EN
Non
synchronous
21
LOCK
Non
synchronous
23
SE_VDD
–
24
CLKOUT_SE
–
25
D_VDD
–
27
DIFF_OUT_VDD –
29, 28 CLKOUT,
–
CLKOUT
32
DIV_VDD
33,34
VCO, VCO
35
VCO_GND
–
Analog
–
Type Description
Input
CONTROL SIGNAL INPUT
Signal levels are LVCMOS compatible.
Controls the output frequency of the cleaned clock, for HD input clocks.
See Section 3.5 for operation.
Input
CONTROL SIGNAL INPUT
Signal levels are LVCMOS compatible.
Selects the phase of the output clock with respect to the selected input
clock.
See Section 3.6 for operation.
Output
STATUS SIGNAL OUTPUT
Signal levels are LVCMOS compatible.
This pin will be HIGH when the output clock is locked to the selected input
clock.
It will be LOW otherwise.
Power
Positive power supply connection for the single-ended clock driver.
Determines the output level of CLKOUT_SE. Connect to filtered +1.8V DC
or +3.3V DC.
NOTE: If the single-ended clock output is not used, this pin should be tied
to ground.
Output
CLOCK SIGNAL OUTPUT
Signal levels are LVCMOS compatible.
Single-ended video clock output signal.
See Section 3.7.2 for operation.
Power
Positive power supply connection for the single-ended output clock buffer.
Connect to filtered +1.8V DC.
NOTE: If the single-ended clock output is not used, this pin should be tied
to ground.
Power
Positive power supply connection for the LVDS clock outputs. Connect to
filtered +1.8V DC.
NOTE: If the LVDS clock outputs are not used, this pin should be tied to
ground.
Output
CLOCK SIGNAL OUTPUT
Differential video clock output signal.
This is the lowest jitter output of the device.
See Section 3.7.1 for operation.
Power Positive power supply connection for the divider block. Connect to filtered
+1.8V DC.
Input
Differential input for the external VCO reference signal. When using the
recommended VCO, leave VCO unconnected.
See Section 3.3.4 for operation.
Power Ground reference for the external voltage controlled oscillator. Connect to
pins 2, 4, 6, and 8 of the GO1555.
39145 - 3 November 2007
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