cy28rs680 SpectraLinear Inc, cy28rs680 Datasheet - Page 16

• Manufacturer Part Number: cy28rs680
• Description: Clock Generator For Ati Rs5xx/6xx Chipsets
• Manufacturer: SpectraLinear Inc

Rev 1.0, March 28, 2007
AC Electrical Specifications
T
T
T
T
L
CPU Outputs
T
V
L
T
∆ V
V
∆ V
T
T
SRC
T
T
T
T
T
ODSSAbs
T
T
L
T
T
∆T
∆T
V
V
V
ATIG
T
T
T
Parameter
Crystal
ACC
ACC
ACC
DC
PERIOD
R
CCJ
R
DIFF
SKEW
CM
DC
JCYC
DC
PERIOD
PERIODSS
PERIODAbs
PERI-
SKEW
CCJ
R
RFM
HIGH
LOW
OX
DC
PERIOD
PERIODSS
R
F
/ T
/ T
/ T
DIFF
CM
F
F
F
XIN Duty Cycle
XIN Period
XIN Rise and Fall Times
XIN Cycle to Cycle Jitter
Long-term Accuracy
Output Slew Rate
Differential Voltage
Long Term Accuracy
Any CPU to CPU Clock Skew
Change in VDIFF_DC Magnitude
Common Mode Voltage
Change in V
Duty Cycle
Cycle to Cycle Jitter
SRCT and SRCC Duty Cycle
100 MHz SRCT and SRCC Period
100 MHz SRCT and SRCC Period, SSC Measured at crossing point V
100 MHz SRCT and SRCC Absolute
Period
100 MHz SRCT and SRCC Absolute
Period, SSC
Any SRCT/C to SRCT/C 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
ATIGT and ATIGC Duty Cycle
100 MHz ATIGT and ATIGC Period
100 MHz ATIGT and ATIGC Period, SSC Measured at crossing point V
CM
Description
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
As an average over 1-µs duration
Over 150 ms
Measured @ test load using VOCM
±400 mV, 0.85 to 1.65
Measured at load single ended
Measured at crossing point V
Measured at load single ended
Measured at load single ended
Measured at load single ended
Measured at V
Measured at 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 differentially from +150mV
Determined as a fraction of
2*(T
Measured singled-ended, including
overshoot
Measured singled-ended, including
undershoot
Measured at crossing point V
Measured at crossing point V
R
– T
F
)/(T
R
OX
OX
Condition
+ T
F
)
DD
and 0.7V
OX
OX
OX
OX
OX
OX
OX
OX
OX
OX
OX
OX
DD
9.997001 10.00300
9.997001 10.05327
10.12800 9.872001
9.872001 10.17827
9.997001 10.00300
9.997001 10.05327
69.841
0.984
–300
–150
–200
–300
Min.
47.5
–0.3
250
0.4
2.5
45
45
45
–
–
–
2
–
0
–
–
–
–
–
CY28RS680
Page 16 of 20
Max.
52.5
71.0
10.0
1.45
1.15
500
300
300
250
150
200
250
125
300
125
125
550
2.3
53
85
55
20
55
7
8
–
Unit
ppm
V/ns
ppm
ppm
V/ns
mV
mV
mV
ns
ns
ns
ps
ps
ps
ns
ns
ns
ps
ps
ps
ps
ns
ns
%
%
%
%
%
V
V
V
V