CS4281 Programming Manual
DS308PRM1
27
Confidential Draft
3/7/00
5 V AC CHARACTERISTICS (PCI SIGNAL PINS ONLY)
(T
A
= 70° C; PCIVDD = CVDD = VAUX = CRYVDD = 3.3 V; VDD5REF = Vcc = 5 V; PCIGND = CGND = CRYGND
= 0 V; Logic 0 = 0 V, Logic 1 = 3.3 V; Reference levels = 1.4 V; unless otherwise noted;(Note 4))
Notes: 4. Specifications guaranteed by characterization and not production testing.
5. Refer to V/I curves in Figure 10. Switching Current High specification does not apply to PME#,
CLKRUN#, and INTA# which are open drain outputs.
6. Cumulative edge rate across specified range. Rise slew rates do not apply to open drain outputs.
Parameter
Symbol
Min
Max
Unit
Switching Current High (Note 5)
0 < Vout
≤
1.4
1.4 < Vout < 2.4
3.1 < Vout < 3.3
I
OH
-44
-
-
-
(Equation A)
mA
mA
Switching Current Low (Note 5)
Vout
≥
2.2
2.2 > Vout > 0.55
0.71 > Vout > 0
I
OL
95
Vout/0.023
-
-
-
(Equation B)
mA
mA
Low Clamp Current
-5 < Vin
≤
-1
I
CL
-
mA
Output rise slew rate
0.4 V - 2.4 V load
(Note 6)
slewr
1
5
V/ns
Output fall slew rate
2.4 V - 0.4 V load
(Note 6)
slewf
1
5
V/ns
44
–
Vout
1.4
–
0.024
---------------------------
+
25
–
Vin
1
+
0.015
-------------------
+
Pull Up
Pull Down
Equation B:
Equation A:
Vcc
2.2
0.55
2.4
1.4
-2
3, 6
95
380
Current (mA)
Current (mA)
-176
test
point
DC
drive point
AC
drive point
-44
V
o
lt
age
DC drive
point
V
o
lt
age
test
point
AC drive
point
I
OL
= 78.5 × Vout × (4.4 - Vout)
for 0 V < Vout < 0.71 V
I
OH
= 11.9 × (Vout - 5.25) × (Vout + 2.45)
for 3.3 V > Vout > 3.1 V
Vcc
Figure 10. 5 V AC Characteristics
D
ra
ft
Содержание CS4281
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