CY28325 Cypress Semiconductor Corp., CY28325 Datasheet - Page 16

• Manufacturer Part Number: CY28325
• Description: FTG For Via Pentium 4 Chipsets
• Manufacturer: Cypress Semiconductor Corp.

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Document #: 38-07119 Rev. **
Switching Characteristics
t
t
t
t
t
t
t
t
t
t
t
t
CPUT0:1, CPUC0:1 0.7V Switching Characteristics
t
t
t
t
V
V
V
Notes:
1
1
2
2
3
3
5
6
9
9
9
9
2
3
4
8
Parameter
2.
3.
4.
5.
6.
oh
ol
crossover
All parameters specified with loaded outputs.
Duty cycle is measured at 1.5V when V
Determined as a fraction of 2*(Trp – Trn)/(Trp +Trn) where Trp is a rising edge and Trp is an intersecting falling edge.
The 0.7V test load is R
Characterize with control register, data byte 9, bits 5 and 6 = 1.
24_48 MHz, 48
MHz, REF,
AGP, PCI
CPU_CS
24_48 MHz
PCI, AGP
24_48 MHz, 48
MHz
PCI,AGP
AGP[0:2]
PCI
AGP
24_48 MHz, 48
MHz
PCI
REF
CPU
CPU
CPU
CPU
CPU
CPU
CPU
CPU
Output
s
= 33.2 ohm, R
Output Duty Cycle
Output Duty Cycle
Rising Edge Rate
Rising Edge Rate
Falling Edge Rate
Falling Edge Rate
AGP-AGP Skew
PCI-PCI Skew
Cycle-Cycle Clock Jitter
Cycle-Cycle Clock Jitter
Cycle-Cycle Clock Jitter
Cycle-Cycle Clock Jitter
Rise Time
Fall Time
CPU-CPU Skew
Cycle-Cycle Clock Jitter
Rise/Fall Matching
High-level Output Voltage
including overshoot
Low-level Output Voltage
including undershoot
Crossover Voltage
[2]
p
DD
= 49.9 ohm in test circuit.
Over the Operating Range
= 3.3V. When V
PRELIMINARY
Description
[6]
[6]
DD
[ 6. ]
[ 3 ]
[ 3 ]
= 2.5V, duty cycle is measured at 1.25V.
Measured at 1.5V
Measured at 1.5V
Between 0.4V and 2.4V
Between 0.4V and 2.4V
Between 2.4V and 0.4V
Between 2.4V and 0.4V
Measured at 1.5V
Measured at 1.5V
Measured at 1.5V t
Measured at 1.5V t
Measured at 1.5V t
Measured at 1.5V t
Measured single ended waveform
from 0.14V to 0.56V
Measured single ended waveform
from 0.14V to 0.56V
Measured at Crossover
Measured at Crossover t
With all outputs running
Measured with test loads
Measured with test loads
Measured with test loads
Measured with test loads
Test Conditions
9 =
9 =
9 =
9 =
t
t
t
t
9A
9A
9A
9A
8 =
[ 4 , 5 ]
[ 5 ]
[ 5 ]
[ 5 ]
– t
– t
– t
– t
t
9B
9B
9B
9B
8A
– t
8B
45
45
0.5
0.5
0.5
1.0
175
175
-0.15
0.28
Min.
CY28325-2
55
55
2.0
2.0
2.0
4.0
300
500
250
350
500
1000
700
700
150
150
20
0.85
0.43
Max.
Page 16 of 19
%
%
ps
ps
ps
V/ns
ps
ps
ps
ps
ps
ps
ps
ps
ps
ps
%
V
V
V
Unit