CY2280 Cypress Semiconductor, CY2280 Datasheet - Page 5

• Manufacturer Part Number: CY2280
• Description: 100-MHz Pentium II Clock Synthesizer/Driver with Spread Spectrum for Mobile or Desktop PCs
• Manufacturer: Cypress Semiconductor

Electrical Characteristics
Switching Characteristics
Document #: 38-07207 Rev. *A
Notes:
Parameter
Parameter
t
t
t
t
t
t
t
t
t
t
t
t
t
t
Notes:
4.
5.
6.
10. APIC lags CPU for -21S option.
1
2
2
2
3
4
5
6
7
8
9
10
11
12
7.
8.
9.
Electrical parameters are guaranteed with these operating conditions.
Crystal Inputs have CMOS thresholds.
Parameter is guaranteed by design and characterization. Not 100% tested in production.
All parameters specified with loaded outputs.
Duty cycle is measured at 1.5V when V
PCI lags CPU for -11S and -21S options.
All
CPUCLK,
APIC
PCICLK
USBCLK,
REF
CPUCLK
CPUCLK
CPUCLK
CPUCLK,
PCICLK
PCICLK,
PCICLK
CPUCLK,
APIC
APIC
CPUCLK
PCICLK
CPUCLK,
PCICLK
Output
Description
Output Duty Cycle
CPU and APIC Clock
Rising and Falling Edge
Rate
PCI Clock Rising and
Falling Edge Rate
USB, REF Rising and
Falling Edge Rate
CPU Clock Rise Time
CPU Clock Fall Time
CPU-CPU Clock Skew
CPU-PCI Clock Skew
PCI-PCI Clock Skew
CPU-APIC Clock
Skew
APIC-APIC Clock Skew
Cycle-Cycle Clock Jitter
Cycle-Cycle Clock Jitter
Power-up Time
[10]
Description
Over the Operating Range
[6, 7]
DD
= 3.3V. When V
[8]
[9]
DD
= 2.5V, duty cycle is measured at 1.25V.
t
Between 0.4V and 2.0V
Between 0.4V and 2.4V
Between 0.4V and 2.4V
Between 0.4V and 2.0V
Between 2.0V and 0.4V
Measured at 1.25V
Measured at 1.25V for 2.5V
clocks, and at 1.5V for 3.3V
clocks
Measured at 1.5V
Measured at 1.25V for 2.5V
clocks
Measured at 1.25V
Measured at 1.25V
Measured at 1.5V
CPU, PCI clock stabilization from
power-up
1
= t
1A
t
1B
Test Conditions
Test Conditions
-1,-11S,
-21S
-1,-11S,
-21S
-1,-11S,
-21S
-1,-11S,
-21S
-1,-11S,
-21S
-21S
-1,-11S,
-21S
Min. Typ. Max.
1.0
1.0
0.5
0.4
0.4
1.5
2.0
45
100
100
200
250
50
Min. Max. Unit
CY2280
Page 5 of 12
175
250
175
250
500
4.0
4.0
2.0
1.6
1.6
4.0
4.5
55
3
V/ns
V/ns
V/ns
Unit
ms
ns
ns
ps
ns
ps
ns
ps
ps
ps
%