CY28400-2
AC Electrical Specifications (continued) (Measured in High Bandwidth Mode)
Parameter
'VOX
Description
Vcross Variation over all edges
Differential Ringback Voltage
Time before ringback allowed
Absolute maximum input voltage
Absolute minimum input voltage
DIFT and DIFC Duty Cycle
Rise/Fall Matching
Condition
Min.
Max.
140
Unit
mV
mV
ps
V
Measured SE
VRB
–100
500
100
TSTABLE
VMAX
1.15
VMIN
–0.3
45
–
V
TDC
Measured at crossing point VOX
55
20
%
TRFM
Determined as a fraction of 2*(TR – TF)/(TR + TF)
%
DIF at 0.7V
FIN
Input Frequency
Bypass or PLL 1:1
90
–
210
0
MHz
ppm
%
FERROR
TDC
Input/Output Frequency Error
DIFT and DIFC Duty Cycle
Average Period
Bypass or PLL 1:1
Measured at crossing point VOX
Measured at crossing point VOX at 100 MHz
45
55
TPERIOD
TR / TF
9.9970 10.0533 ns
DIFT and DIFC Rise and Fall Times
Single ended measurement: VOL = 0.175 to
VOH = 0.525V (Averaged)
175
700
ps
TRFM
Rise/Fall Matching
Determined as a fraction of
2 * (TR – TF)/(TR + TF)
–
20
%
'TR/'TF
Rise and Fall Time Variation Variation Single ended measurement: VOL = 0.175 to
VOH = 0.525V (Real Time)
–
125
ps
VHIGH
VLOW
VOX
Voltage High
Voltage Low
Measured SE
Measured SE
660
–150
250
–
850
–
mv
mv
mv
mV
V
Crossing Point Voltage at 0.7V Swing Measured SE
550
140
'VOX
VOVS
Vcross Variation over all edges
Maximum Overshoot Voltage
Measured SE
Measured SE
–
VHIGH
0.3
+
VUDS
VRB
Minimum Undershoot Voltage
Ring Back Voltage
Measured SE
–
0.2
–
–0.3
N/A
50
V
Measured SE
V
TCCJ
Cycle to Cycle Jitter
PLL Mode
ps
ps
ps
ps
ns
Bypass Mode (Jitter is additive)
Measured at crossing point VOX
Measured at crossing point VOX
–
50
TSKEW
TPD
Any DIFT/C to DIFT/C Clock Skew
Input to output skew in PLL mode
–
50
–
250
4.5
Input to output skew in Non-PLL mode Measured at crossing point VOX
2.5
M e a s u re m e n t
P o in t
T P C B
4 9 .9 :
3 3 :
3 3 :
D IF T
2 p F
M e a s u re m e n t
P o in t
T P C B
4 9 .9 :
D IF C
IR E F
2 p F
4 7 5 :
T ra c e Im p e d a n c e M e a s u re d D iffe re n tia lly
Figure 12. Differential Clock Termination
Rev 1.0,November 21, 2006
Page 12 of 15
SPECTRALINEAR [ SPECTRALINEAR INC ]
