cy2275a Cypress Semiconductor Corporation., cy2275a Datasheet - Page 6

• Manufacturer Part Number: cy2275a
• Description: Pentium Clock Synthesizer/driver Desktop With Intel 82440lx With Dimms
• Manufacturer: Cypress Semiconductor Corporation.

Switching Characteristics
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
Notes:
Parameter
1
1C
1C
1D
1D
2
2
2
3
4
5
6
7
8
8
9
6.
7.
All parameters specified with loaded outputs.
Duty cycle is measured at 1.5V when V
All
CPUCLK
PCICLK
CPUCLK
PCICLK
CPUCLK,
IOAPIC
PCICLK,
REF0
SDRAM
CPUCLK
CPUCLK
CPUCLK
CPUCLK,
PCICLK
CPUCLK,
SDRAM
CPUCLK,
SDRAM
PCICLK
CPUCLK,
PCICLK,
SDRAM
Output
Output Duty Cycle
CPU Clock HIGH Time
PCI Clock HIGH Time
CPU Clock LOW Time
PCI Clock LOW Time
CPU and IOAPIC Clock
Rising and Falling Edge
Rate
PCI, REF0 Clock Rising
and Falling Edge Rate
SDRAM Rising and Fall-
ing Edge Rate
CPU Clock Rise Time
CPU Clock Fall Time
CPU-CPU Clock Skew
CPU-PCI Clock Skew
CPU-SDRAM Clock
Skew
Cycle-Cycle Clock Jitter
Cycle-Cycle Clock Jitter
Power-up Time
[6]
Description
DD
= 3.3V. When V
[7]
DDCPU
t
Above 2.0V, 66.6 MHz, V
Above 2.4V, 33.3 MHz
Below 0.4V, 66.6 MHz, V
Below 0.4V, 33.3 MHz
Between 0.4V and 2.0V
Between 0.4V and 2.4V
Between 0.4V and 2.4V
Between 0.4V and 2.0V, V
Between 2.0V and 0.4V, V
Measured at 1.25V, 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 1.25V for 2.5V clocks, and
at 1.5V for 3.3V clocks
Measured at 1.5V
CPU, PCI, and SDRAM clock stabiliza-
tion from power-up
1
= 2.5V, CPUCLK duty cycle is measured at 1.25V.
= t
1A
6
t
1B
Test Conditions
DDCPU
DDCPU
DDCPU
DDCPU
DDCPU
= 2.5V
= 2.5V
= 2.5V
= 2.5V
= 2.5V
Min.
12.0
12.0
0.75
0.75
0.75
5.2
5.0
0.4
0.4
1.0
45
Typ.
100
500
3.5
50
1
1
1
CY2275A
Max.
2.13
2.13
250
600
250
500
4.0
4.0
4.0
5.8
55
3
Unit
V/ns
V/ns
V/ns
ms
ns
ns
ns
ns
ns
ns
ps
ns
ps
ps
ps
%