CY28349B Cypress Semiconductor, CY28349B Datasheet - Page 17

• Manufacturer Part Number: CY28349B
• Description: FTG
• Manufacturer: Cypress Semiconductor

-
Document #: 38-07454 Rev. *A
Switching Characteristics
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
V
V
V
Notes:
1
2
2
2
3
3
3
4
5
6
7
8
9
9
9
9
Parameter
2.
3.
4.
5.
6.
oh
ol
crossover
Multiple Supplies: The voltage on any input or I/O pin cannot exceed the power pin during power-up. Power supply sequencing is NOT required.
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 Trn is an intersecting falling edge.
The test load is R
All
CPU
48MHz, REF
PCI, 3V66,
CPU
48MHz, REF
PCI, 3V66
CPU
3V66 [0:1]
PCI
3V66,PCI
CPU
3V66
48MHz
PCI
REF
CPU, PCI
CPU
CPU
CPU
CPU
CPU
CPU
s
Output
= 33.2W, R
p
= 49.9W in test circuit.
Output Duty Cycle
Rise Time
Rising Edge Rate
Rising Edge Rate
Fall Time
Falling Edge Rate
Falling Edge Rate
CPU-CPU Skew
3V66-3V66 Skew
PCI-PCI Skew
3V66-PCI Clock Skew
Cycle-Cycle Clock Jitter
Cycle-Cycle Clock Jitter
Cycle-Cycle Clock Jitter
Cycle-Cycle Clock Jitter
Cycle-Cycle Clock Jitter
Settle Time
Rise/Fall Matching
Overshoot
Undershoot
High-level Output Voltage
Low-level Output Voltage
Crossover Voltage
Over the Operating Range
DD
= 3.3V. When V
Description
DD
[4]
= 2.5V, duty cycle is measured at 1.25V.
[3]
t
Measured at 20% to 80% of V
Between 0.4V and 2.4V
Between 0.4V and 2.4V
Measured at 80% to 20% of V
Between 2.4V and 0.4V
Between 2.4V and 0.4V
Measured at Crossover
Measured at 1.5V
Measured at 1.5V
3V66 leads. Measured at 1.5V
Measured at Crossover t
With all outputs running
Measured at 1.5V t
Measured at 1.5V t
Measured at 1.5V t
Measured at 1.5V t
CPU and PCI clock stabilization from
power-up
Measured with test loads
Measured with test loads
Measured with test loads
Measured with test loads
Measured with test loads
Measured with test loads
1A
/(t
1B
)
Test Conditions
9 =
9 =
9 =
9 =
t
t
t
t
9A
9A
9A
9A
8 =
[5, 6]
[6]
[6]
[6]
[6]
[6]
– t
– t
– t
– t
t
9B
9B
9B
9B
8A
oh
oh
– t
8B
Min.
–0.2
0.65
45%
0.65
175
175
0.5
1.0
0.5
1.0
1.5
0.0
45
of
CY28349B
55% of
V
Max.
1000
20%
0.74
0.05
0.74
700
700
150
500
500
200
250
350
500
2.0
4.0
2.0
4.0
3.5
0.2
55
oh
3
Page 17 of 22
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Unit
V/ns
V/ns
V/ns
V/ns
ms
ps
ps
ps
ps
ps
ns
ps
ps
ps
ps
ps
%
V
V
V
V
V