PI6C2952FBE 데이터 시트보기 (PDF) - Pericom Semiconductor
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PI6C2952FBE Datasheet PDF : 6 Pages
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PI6C2952
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AC Characteristics (TA = 0°C to 70°C, VCC = 3.3V± 5%)
Symbol
Characteristics
Conditions
Min.
Typ.
Max. Units
tr, tf Output Rise/Fall Time (Note 4.)
0.8 to 2.0V
0.10
1.0
ns
IPW Output Pulse Width (Note 4.)
tCYCLE/2
–750
tCYCLE/2
±500
tCYCLE/2
+750
Output-to-Output Skew Excluding Qa0 (Note 4.) Same Frequencies
tOS All Outputs
Same Frequencies
All Outputs
Different Frequencies
350
ps
450
550
PLL VCO Lock Range Feedback = VCO/4
VCO_Sel = 0
200
fVCO
Feedback = VCO/6
VCO_Sel = 0
200
Feedback = VCO/8
VCO_Sel = 1
200
Feedback = VCO/12 VCO_Sel = 1
200
Maximum Output Frequency
fmax
Qc,Qb (÷2)
Qa,Qb,Qc (÷4)
Qa (÷6)
(Note 4.)
180
120
80
480
480
480
480
MHz
tpd
REFCLK to FBIN Delay
tPLZ, tPHZ Output Disable Time
tPZL, tPZH Output Enable Time
tjitter Cycle–to–Cycle Jitter (Peak–to–Peak)
Notes 4 and 5.
50ohms to VCC/2
50ohms to VCC/2
–200
0
200
ps
2
8
ns
2
10
±100
ps
tlock Maximum PLL Lock Time
tJP Long term Period Jitter
Note 5.
10
ms
TBD
ps
4. 50 ohms to VCC/2.
5. tpd is specified for 50 MHz input ref, the window will shrink/grow proportionally from the minimum limit with shorter/longer input
reference periods. The tpd does not include jitter.
Applications Information
Driving Transmission Lines
The PI6C2952 clock driver was designed to drive high-speed
signals in a terminated transmission line environment. To provide
the optimum flexibility to the user, the output drivers were IN
designed to exhibit the lowest impedance possible. With an output
impedance of less than 10 ohms, the drivers can drive either
parallel- or series-terminated transmission lines.
IN
PI6C2952
Output
Buffer
7 ohms
RS= 43 ohms ZO= 50 ohms
PI6C2952
Output
Buffer
7 ohms
RS= 43 ohms ZO= 50 ohms
RS= 43 ohms ZO= 50 ohms
OutA
OutB0
OutB1
Figure 3. Single versus Dual Transmission Lines
4
PS8542A 01/30-06
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