CY28378 Cypress Semiconductor, CY28378 Datasheet - Page 15

• Manufacturer Part Number: CY28378
• Description: FTG for Pentium 4 and Intel 845 Series Chipset
• Manufacturer: Cypress Semiconductor

Document #: 38-07519 Rev. **
DC Electrical Specifications
I
I
AC Electrical Specifications
DD3
DDPD3
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
V
V
V
V
V
Notes:
1
2
2
2
3
3
3
4
5
6
7
8
9
9
9
9
RFM
Parameter
2.
3.
4.
5.
Parameter
OVS
UDS
OH
OL
OX
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 test load is R
All
CPUT/C
48MHz, REF
PCI, 3V66,
CPUT/C
48MHz, REF
PCI, 3V66
CPUT/C
3V66 [0:1]
PCI
3V66,PCI
CPUT/C
3V66
48MHz
PCI
REF
CPUT/C, PCI
CPUT/C
CPUT/C
CPUT/C
CPUT/C
CPUT/C
CPUT/C
3.3V Power Supply Current
3.3V Shutdown Current
s
Output
= 33.2W, R
p
= 49.9W in test circuit.
Description
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 Measured with test loads
Low-level Output Voltage Measured with test loads
Crossover Voltage
DD
(continued)
[2]
= 3.3V. When V
Description
DD
[3]
= 2.5V, duty cycle is measured at 1.25V.
V
V
DD_CORE
DD_CORE
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
1A
/(t
1B
)
/V
/V
Test Conditions
DD33
DDQ3
Condition
= 3.465V, F
= 3.465V
9 =
9 =
9 =
9 =
t
t
t
t
9A
9A
9A
9A
8 =
[4, 5]
[5]
[5]
[5]
[5]
[5]
– t
– t
– t
– t
CPU
t
9B
9B
9B
9B
8A
oh
oh
= 133 MHz
– t
8B
Min.
–0.2
0.65
175
175
250
0.5
1.0
0.5
0.7
1.0
0.0
45
Min.
V
oh
Max.
1000
0.74
0.05
800
800
150
500
500
600
600
600
600
550
2.0
4.0
2.0
4.0
4.5
55
30
3
+ 0.2
CY28378
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Max.
250
25
V/ns
V/ns
V/ns
V/ns
Unit
ms
mv
ps
ps
ps
ps
ps
ns
ps
ps
ps
ps
ps
Unit
%
V
V
V
V
mA
mA