CY2273A Cypress Semiconductor, CY2273A Datasheet - Page 7

• Manufacturer Part Number: CY2273A
• Description: K6 Clock Synthesizer/Driver
• Manufacturer: Cypress Semiconductor

Switching Characteristics for CY2273A-1, CY2273A-2
t
t
t
t
t
t
t
t
t
t
t
t
t
t
Notes:
Parameter
10. Measured at CPU=66.6 MHz, SDRAM=66.6 MHz, PCI=33.3 MHz, AGP=66.6 MHz.
1
2
2
2
3
4
5
6
7
8
9
10
10
11
8.
9.
All parameters specified with loaded outputs.
Duty cycle is measured at 1.5V when V
All
CPUCLK
SDRAM, PCI,
REF0, USB
AGP (-2 only)
CPUCLK
CPUCLK
CPUCLK
CPUCLK,
PCICLK
CPUCLK,
SDRAM
PCICLK,
PCICLK
PCICLK,
AGP (-2 only)
CPUCLK,
SDRAM
PCICLK,
AGP (-2 only)
CPUCLK,
PCICLK,
AGP (-2 only),
SDRAM
Output
Output Duty Cycle
CPU Clock Rising and
Falling Edge Rate
SDRAM, PCI, REF0
Clock Rising and Fall-
ing Edge Rate
AGP Rising and Falling
Edge Rate
CPU Clock Rise Time
CPU Clock Fall Time
CPU-CPU Clock Skew Measured at 1.25V, V
CPU-PCI Clock Skew
CPU-SDRAM Clock
Skew
PCI-PCI Clock Skew
PCICLK-AGP Clock
Skew (-2 only)
Cycle-Cycle Clock
Jitter
Cycle-Cycle Clock
Jitter
Power-up Time
[10]
[10]
Description
[10]
DD
= 3.3V. When V
[10]
[10]
[9, 10]
DDCPU
t
Between 0.4V and 2.0V, V
Between 0.4V and 2.4V, V
Between 0.4V and 2.4V
Between 0.4V and 2.4V
Between 0.4V and 2.0V, V
Between 0.4V and 2.4V, V
Between 2.0V and 0.4V, V
Between 2.4V and 0.4V, V
Measured at 1.5V, V
Measured at 1.25V for 2.5V clocks, and
at 1.5V for 3.3V clocks
Measured at 1.25V for 2.5V clocks, and
at 1.5V for 3.3V clocks
Measured at 1.5V
Measured at 1.5V
Measured at 1.25V for 2.5V clocks, and
at 1.5V for 3.3V clocks
Measured at 1.5V
CPU, PCI, AGP, and SDRAM clock sta-
bilization from power-up
1
= 2.5V, CPUCLK duty cycle is measured at 1.25V.
= t
1A
7
t
1B
Test Conditions
[8]
Over the Operating Range
DDCPU
DDCPU
DDCPU
DDCPU
DDCPU
DDCPU
DDCPU
DDCPU
= 3.3V
= 2.5V
= 2.5V
= 3.3V
= 2.5V
= 3.3V
= 2.5V
= 3.3V
Min.
0.75
0.85
0.85
0.4
0.5
0.4
0.5
1.0
45
Typ.
100
3.0
50
CY2273A
Max.
2.13
2.67
2.13
2.67
250
650
500
500
250
500
4.0
4.0
4.0
5.5
55
3
V/ns
V/ns
V/ns
Unit
ms
ns
ns
ps
ns
ps
ps
ps
ps
ps
%