ICS9214YGLF-T View Datasheet(PDF) - Integrated Circuit Systems
Part Name
Description
MFG CO.
'ICS9214YGLF-T' PDF : 16 Pages View PDF
Integrated
Circuit
Systems, Inc.
ICS9214
Input Clock Signal
The ICS9214 receives either a differential or single-ended reference clock (CLK_INT/C). When the reference input clock is
from a differential clock source, it must meet the voltage levels and timing requirements listed in the DC Characteristics –
Inputs and AC Characteristics – Inputs tables.
For a singled-ended clock input, an external voltage divider and a supply voltage, as shown in Figure 2, provide a reference
voltage VTH at the CLK_INC pin to determine the proper switching point for CLK_INT. The range of VTH is specified in the DC
Characteristics – Inputs table.
Swing Current
Control
ISET
RRC
ODCLK_T
Differential Driver
ODCLK_C
VTS
R1
R2
Measurement
Point
ZCH
R3
VTS Measurement
Point
R1
R2
ZCH
R3
VT
RT
VT
RT
V(t)
Figure 2. Example System Clock Driver Equivalent Circuit
tF
tR
VH
80%
20%
VL
ODCLK_T
ODCLK_C
Figure 3. Input and Output Voltage Waveforms
Figure 4. Crossing-point Voltage
Vx+
Vx,nom
Vx-
0809D—04/07/06
12
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