CY28344 Cypress Semiconductor, CY28344 Datasheet - Page 16

• Manufacturer Part Number: CY28344
• Description: FTG
• Manufacturer: Cypress Semiconductor

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Document #: 38-07113, Rev. *A
Switching Characteristics
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
V
V
V
t
t
t
t
V
V
V
Notes:
1
3
3
5
5
6
7
9
9
9
9
2
3
4
8
2
3
4
8
Parameter
3.
4.
5.
6.
7.
CPU 1.0V Switching Characteristics
CPU 0.7V Switching Characteristics
oh
ol
oh
ol
crossover
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
The 1.0V test load is shown on test circuit page.
All
USB, REF,
DOT
PCI,3V66
3V66[0:1]
66BUFF[0:2]
PCI
3V66,PCI
3V66
USB, DOT
PCI
REF
CPU
CPU
CPU
CPU
CPU
CPU
CPU
CPU
CPU
CPU
CPU
CPU
CPU
CPU
CPU
CPU
Output
s
= 33.2 ohm, R
Output Duty Cycle
Falling Edge Rate
Falling Edge Rate
3V66-3V66 Skew
66BUFF-66BUFF Skew
PCI-PCI Skew
3V66-PCI Clock Jitter
Cycle-Cycle Clock Jitter
Cycle-Cycle Clock Jitter
Cycle-Cycle Clock Jitter
Cycle-Cycle Clock Jitter
RiseTime
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
RiseTime
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
[3]
p
DD
= 49.9 ohm in test circuit.
Over the Operating Range, PCI,3V66 Clock Outputs.(Lump CapacitanceTest Load = 20 pF)
= 3.3V. When V
Description
DD
PRELIMINARY
[4]
= 2.5V, duty cycle is measured at 1.25V.
Between 2.4V and 0.4V
Between 2.4V and 0.4V
Measured at 1.5V
Measured at 1.5V
Measured at 1.5V
3V66 leads. 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 differential waveform from
–0.35V to +0.35V
Measured differential waveform from
–0.35V to +0.35V
Measured at Crossover
Measured at Crossover t
Measured with test loads
Measured with test loads
Measured with test loads
Measured with test loads
Measured single ended waveform
from 0.175V to 0.525V
Measured single ended waveform
from 0.175V to 0.525V
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
Measured at 1.5V
Test Conditions
9 =
9 =
9 =
9 =
t
t
t
t
9A
9A
9A
9A
8 =
8 =
[5]
[5]
[5]
[5]
[3,4]
[4]
[4]
[4]
– t
– t
– t
– t
t
t
9B
9B
9B
9B
8A
8A
– t
– t
8B
8B
45
0.5
1.0
1.5
175
175
0.92
-0.2
0.51
175
175
-0.15
0.28
Min.
55
2.0
4.0
500
175
500
3.5
250
350
500
1000
467
467
150
150
325
1.45
0.35
0.76
700
700
150
150
20
0.85
0.43
CY28344
Max.
Page 16 of 22
%
ps
V/ns
ps
ps
ps
ns
ps
ps
ps
ps
ps
ps
ps
ps
mV
V
V
V
ps
ps
ps
ps
%
V
V
V
Unit