cy28src01 Cypress Semiconductor Corporation., cy28src01 Datasheet - Page 8

• Manufacturer Part Number: cy28src01
• Description: Pci-express Clock Generator
• Manufacturer: Cypress Semiconductor Corporation.

Document #: 001-00058 Rev. *A
AC Electrical Specifications
Test and Measurement Set-up
The following diagram shows the test load configuration for the
differential SRC outputs.
Crystal
T
T
T
SRC
T
T
T
T
T
T
T
T
L
T
T
∆T
∆T
V
V
V
V
V
V
DC
PERIOD
R
DC
PERIOD
PERIODSS
PERIODAbs
PERIODSSAbs
SKEW
SKEW
CCJ
ACC
R
RFM
Parameter
HIGH
LOW
OX
OVS
UDS
RB
R
F
/ T
/ T
F
F
XIN Duty Cycle
XIN Period
XIN Rise and Fall Times
SRCT and SRCC Duty Cycle
100-MHz SRCT and SRCC Period
100-MHz SRCT and SRCC Period, SSC
100-MHz SRCT and SRCC Absolute Period
100-MHz SRCT and SRCC Absolute Period, SSC Measured at crossing point V
Any SRCT/C to SRCT/C Clock Skew
Any SRCS clock to Any SRCS clock Skew
SRCT/C Cycle to Cycle Jitter
SRCT/C Long Term Accuracy
SRCT and SRCC Rise and Fall Times
Rise/Fall Matching
Rise TimeVariation
Fall Time Variation
Voltage High
Voltage Low
Crossing Point Voltage at 0.7V Swing
Maximum Overshoot Voltage
Minimum Undershoot Voltage
Ring Back Voltage
IR E F
S R C C
S R C T
4 7 5 Ω
Description
3 3 Ω
3 3 Ω
Figure 3. 0.7V Load Configuration
4 9 .9 Ω
4 9 .9 Ω
PRELIMINARY
1 0 0 Ω
1 0 0 Ω
The device will operate reliably with
input duty cycles up to 30/70 but the
REF clock duty cycle will not be within
specification
When XIN is driven from an external
clock source
Measured between 0.3V
0.7V
Measured at crossing point V
Measured at crossing point V
Measured at crossing point V
Measured at crossing point V
Measured at crossing point V
Measured at crossing point V
Measured at crossing point V
Measured at crossing point V
Measured from V
V
Determined as a fraction of
2*(T
Math averages Figure 3
Math averages Figure 3
See Figure 3. Measure SE
OH
R
DD
= 0.525V
– T
F
)/(T
2 p F
2 p F
Condition
R
M e a s u r e m e n t
M e a s u r e m e n t
+ T
OL
F
= 0.175 to
)
P o in t
P o in t
DD
and
OX
OX
OX
OX
OX
OX
OX
OX
OX
9.997001 10.00300 ns
9.997001 10.05327 ns
10.12800 9.872001 ns
9.872001 10.17827 ns
69.841
–150
Min.
47.5
–0.3
175
660
250
45
–
–
–
–
–
–
–
–
–
-
CY28SRC01
V
Page 8 of 10
Max.
HIGH
52.5
71.0
10.0
250
250
125
300
700
125
125
850
550
0.3
0.2
55
20
–
–
+
Unit
ppm
mV
mv
mv
ns
ns
ps
ps
ps
ps
ps
ps
%
%
%
V
V
V
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