CY28411
AC Electrical Specifications (continued)
Parameter
TPERIOD
TPERIODAbs
THIGH
Description
Condition
Measurement at 1.5V
Min.
Max.
Unit
Period
20.83125 20.83542 ns
Absolute Period
USB high time
Measurement at 1.5V
20.48125 21.18542
ns
ns
ns
ns
ps
Measurement at 2.4V
8.094
7.694
1.0
10.036
9.836
2.0
TLOW
USB low time
Measurement at 0.4V
TR / TF
Rise and Fall Times
Cycle to Cycle Jitter
Measured between 0.8V and 2.0V
Measurement at 1.5V
TCCJ
–
350
REF
TDC
REF Duty Cycle
Measurement at 1.5V
45
55
%
TPERIOD
TPERIODAbs
TR / TF
REF Period
Measurement at 1.5V
69.8203
69.8622
ns
REF Absolute Period
REF Rise and Fall Times
REF Cycle to Cycle Jitter
Measurement at 1.5V
68.82033 70.86224 ns
Measured between 0.8V and 2.0V
Measurement at 1.5V
0.5
–
2.0
V/ns
ps
TCCJ
1000
ENABLE/DISABLE and SET-UP
TSTABLE Clock Stabilization from Power-up
TSS
–
10.0
0
1.8
–
ms
ns
ns
Stopclock Set-up Time
Stopclock Hold Time
TSH
–
Test and Measurement Set-up
For PCI Single-ended Signals and Reference
The following diagram shows the test load configurations for
the single-ended PCI, USB, and REF output signals.
ꢂꢃ:
ꢁꢁ:
PCI/
USB
Measurement
Point
5pF
Measurement
Point
5pF
ꢂꢃ:
ꢂꢃ:
ꢄꢄ:
REF
Measurement
Point
5pF
ꢄꢄ:
Figure 13. Single-ended Load Configuration
Rev 1.0,November 22, 2006
Page 16 of 18
SPECTRALINEAR [ SPECTRALINEAR INC ]
