CY28RS400 Cypress Semiconductor, CY28RS400 Datasheet - Page 16

• Manufacturer Part Number: CY28RS400
• Description: Clock Generator for ATI RS400 Chipset
• Manufacturer: Cypress Semiconductor

Document #: 38-07637 Rev. *B
AC Electrical Specifications
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.
For Differential CPU and SRC Output Signals
The following diagram shows the test load configuration for the
differential CPU and SRC outputs.
T
T
ENABLE/DISABLE and SET-UP
T
T
T
Parameter
R
CCJ
STABLE
SS
SH
/ T
F
REF Rise and Fall Times
REF Cycle to Cycle Jitter
Clock Stabilization from Power-up
Stopclock Set-up Time
Stopclock Hold Time
IR E F
C P U C
S R C C
C P U T
S R C T
4 7 5 Ω
Description
REF
USB
PCI/
3 3 Ω
(continued)
3 3 Ω
Figure 12. Single-ended Load Configuration
Figure 13. 0.7V Load Configuration
4 9 .9 Ω
4 9 .9 Ω
12Ω
12Ω
12Ω
12Ω
12Ω
1 0 0 Ω
1 0 0 Ω
Measured between 0.8V and 2.0V
Measurement at 1.5V
60Ω
60Ω
60Ω
60Ω
60Ω
2 p F
2 p F
Condition
M e a s u r e m e n t
M e a s u r e m e n t
5pF
5pF
5pF
5pF
5pF
P o in t
P o in t
Measurement
Measurement
Measurement
Measurement
Measurement
Point
Point
Point
Point
Point
Min.
10.0
0.5
–
–
0
CY28RS400
Page 16 of 19
1000
Max.
4.0
1.8
–
–
Unit
V/n
ms
ps
ns
ns
s