CY28SRC01
AC Electrical Specifications
Parameter
Description
Condition
Min.
Max.
Unit
Crystal
TDC
XIN Duty Cycle
The device will operate reliably with
input duty cycles up to 30/70 but the
REFclockdutycyclewillnotbewithin
specification
47.5
52.5
%
TPERIOD
TR / TF
XIN Period
When XIN is driven from an external 69.841
clock source
71.0
10.0
ns
ns
XIN Rise and Fall Times
Measured between 0.3VDD and
0.7VDD
–
SRC
TDC
SRCT and SRCC Duty Cycle
Measured at crossing point VOX
Measured at crossing point VOX
Measured at crossing point VOX
Measured at crossing point VOX
45
55
%
TPERIOD
100-MHz SRCT and SRCC Period
100-MHz SRCT and SRCC Period, SSC
9.997001 10.00300 ns
9.997001 10.05327 ns
10.12800 9.872001 ns
9.872001 10.17827 ns
TPERIODSS
TPERIODAbs 100-MHz SRCT and SRCC Absolute Period
TPERIODSSAbs 100-MHz SRCTandSRCCAbsolutePeriod, SSC Measured at crossing point VOX
TSKEW
TSKEW
Any SRCT/C to SRCT/C Clock Skew
Measured at crossing point VOX
Measured at crossing point VOX
–
-
250
250
ps
ps
Any SRCS clock to Any SRCS clock Skew
TCCJ
SRCT/C Cycle to Cycle Jitter
Measured at crossing point VOX
Measured at crossing point VOX
Measured from VOL = 0.175 to
–
–
125
300
700
ps
ppm
ps
LACC
SRCT/C Long Term Accuracy
SRCT and SRCC Rise and Fall Times
TR / TF
175
VOH = 0.525V
TRFM
Rise/Fall Matching
Determined as a fraction of
2*(TR – TF)/(TR + TF)
–
20
%
'TR
Rise TimeVariation
–
–
125
125
850
–
ps
ps
'TF
Fall Time Variation
VHIGH
VLOW
VOX
Voltage High
Math averages Figure 3
Math averages Figure 3
660
–150
250
–
mv
mv
mV
V
Voltage Low
Crossing Point Voltage at 0.7V Swing
Maximum Overshoot Voltage
550
VOVS
VHIGH
0.3
+
VUDS
VRB
Minimum Undershoot Voltage
Ring Back Voltage
–0.3
–
–
V
V
See Figure 3. Measure SE
0.2
Test and Measurement Set-up
The following diagram shows the test load configuration for the
differential SRC outputs.
M e a s u re m e n t
P o in t
ꢆ ꢇ ꢇ ꢈ:
ꢀ ꢀ :
S R C T
ꢁ ꢂ ꢃꢂ :
2 p F
M e a s u re m e n t
P o in t
2 p F
ꢆ ꢇ ꢇ ꢈ:
ꢀ ꢀ :
S R C C
IR E F
ꢁ ꢂ ꢃꢂ :
ꢁ ꢄ ꢅ :
Figure 3. 0.7V Load Configuration
Rev 1.0,November 20, 2006
Page 8 of 9
SPECTRALINEAR [ SPECTRALINEAR INC ]
