cy28508 SpectraLinear Inc, cy28508 Datasheet - Page 11

• Manufacturer Part Number: cy28508
• Description: 333 Mhz Low-voltage Differential Sscg
• Manufacturer: SpectraLinear Inc

Rev 1.0, November 24, 2006
DC Electrical Specifications
AC Electrical Specifications
Table 6. Slew Rate Settings Output Divider = /3 (Measured over 10 μs)
Table 7. Slew Rate Settings Output Divider = /2 (Measured over 10 μs)
I
I
I
I
I
Crystal
T
T
REF Output
T
T
T
LOCK Output
T
CPU Outputs
T
T
T
T
V
V
F
T
Parameter
DDR
DD2A
DD2B
DD2C
DD2D
Parameter
DC
PERIOD
DC
RISE
CCJ
FALL
DC
RISE
SKEW
CCJ
DIF
OX
VCO
XS
49
49
49
49
49
49
M
M
/T
/T
FALL
FALL
N Range
N Range
43-65
65-86
43-86
43-65
65-86
43-86
Xin Duty Cycle
Xin Period
REF Duty Cycle
REF Rise and Fall Times
REF Cycle to Cycle Jitter
Lock Fall Time
CPUT/C Duty Cycle
CPUT/C Rise and Fall Times
CPUT/C to CPUT/C Clock Skew Measured at 0.62V at measuring point. See Figure 7.
CPUT/C Cycle to Cycle Jitter
Differential Voltage Swing
Crossing Point Voltage
VCO Operating Frequency
Power-on Hold Off
Power supply additional current for all
3.3V VDDs for loaded REF only
Power supply current for all 2.5V VDDs
with three buffers enabled and loaded
Power supply current for all 2.5V VDDs
with two buffers enabled and loaded
Power supply current for all 2.5V VDDs
with one buffer enabled and loaded
Power supply current for all 2.5V VDDs
with all buffers disabled
Description
Typ. Max. Slew Rate
Typ. Max. Slew Rate
Description
(kHz/μS)
(kHz/μS)
120
55
75
45
80
65
(continued)
Measured at V
Measured at V
remain within its operating range.
Measured at 1.5V, 15-pF lumped load.
Measured from 0.4V to 2.4V, 15-pF lumped load.
Measured at 1.5V, 15-pF lumped load.
Measured from 2.4V to 0.4V, 10-pF lumped load and
10K Ω pull-up.
Measured at 0.62V at measuring point. See Figure 7.
Measured from 0.3V to 0.9V. See Figure 7.
Measured at 0.62V at measuring point. See Figure 7.
At load measuring point. See Figures 7 and 8.
At load measuring point. See Figures 7 and 8.
Over voltage, temperature and process
Outputs will be as shown in Figure 6
Worst-Corner Max Slew
Worst-Corner Max Slew
Output is 14.31818 MHz with VCO
running 666.6 MHz
Output is 224.7 MHz with VCO running
666.6 MHz
Output is 224.7 MHz with VCO running
666.6 MHz
Output is 224.7 MHz with VCO running
666.6 MHz
Output is 224.7 MHz with VCO running
666.6 MHz
Rate (kHz/μS)
Rate (kHz/μS)
DDX
DDX
100
140
150
200
100
70
/2
/2. The VCO frequency must
Condition
Condition
B2b7
B2b7
ICP
ICP
x1
x1
x1
x1
x1
x1
Min.
2048 or 1024
2048 or 1024
B7b7
B7b7
2048
2048
2048
2048
Min.
52.4 69.841 87.3
150
333
Ns
Ns
0.5
0.4
45
45
45
1
Typ.
180
124
70
8
7
Typ.
1.24
0.62
50
50
CY28508
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Variable ICP
Variable ICP
Max.
225
155
10
90
10
Max. Unit
1000
500
100
135
675
1.5
0.9
1.2
55
55
55
B8b7
B8b7
4
2
1
1
0
1
1
0
Unit
MHz
mA
mA
mA
mA
mA
ms
ns
ns
ps
ns
ps
ps
ps
%
%
%
V