CY2254A Cypress Semiconductor, CY2254A Datasheet - Page 4

• Manufacturer Part Number: CY2254A
• Description: Pentium Processor Compatible Clock Synthesizer/Driver
• Manufacturer: Cypress Semiconductor

Electrical Characteristics
Switching Characteristics
Switching Waveforms
Document #: 38-07203 Rev. *A
Notes:
t
t
t
t
t
t
t
t
Parameter
Parameter
Duty Cycle Timing
1
2
3
4
5
6
7
8
All Outputs Rise/Fall Time
3.
4.
[4]
[4]
[4]
[4]
[4]
[4]
[4]
Electrical parameters are guaranteed with these operating conditions.
Guaranteed by design, not tested.
OUTPUT
All
CPUCLK, PCICLK
REF, KBDCLK, USBCLK
REF, KBDCLK, USBCLK
CPUCLK
PCICLK
CPUCLK, PCICLK
CPUCLK
t
t
0.4V
2
3
1.5V
2.4V
Description
Output
t
1A
1.5V
V
[5]
DD
t
1B
= 3.135V
2.4V
0.4V
t
t
2
4
Output Duty Cycle
Output Rising and Fall-
ing Edge Rate
Rise Time
Fall Time
CPU-CPU Clock Skew
PCI-PCI Clock Skew
CPU-PCI Skew
Cycle-Cycle Clock Jitter CPU Clock Jitter
1.5V
3.6V, or 5.0V 10%, T
Name
[6]
Test Conditions
3.3V
0V
t
Measured between 0.4 and 2.4V
Measured between 0.4 and 2.4V
Measured between 2.4 and 0.4V
Measured at 1.5V
Measured at 1.5V
Measured at 1.5V ( 1 option)
Measured at 1.5V ( 2 option)
1
A
= t
= 0 C to +70 C (continued)
1A
t
1B
Description
Min.
Min.
45%
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1
1
CY2254A
Max.
Max.
55%
250
250
500
200
4
4
4
Page 4 of 8
Unit
Unit
V/ns
ns
ns
ps
ps
ns
ps
ps