cs4281 Cirrus Logic, Inc., cs4281 Datasheet - Page 4

• Manufacturer Part Number: cs4281
• Description: Crystalclear Pci Audio Interface Logic
• Manufacturer: Cirrus Logic, Inc.

AC CHARACTERISTICS (PCI SIGNAL PINS ONLY)
(T
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.
Switching Current High
Switching Current Low
Low Clamp Current
Output rise slew rate
Output fall slew rate
4
A
= 70° C; PCIVDD = CVDD = VAUX = CRYVDD = 3.3 V; VDD5REF = 5 V; PCIGND = CGND = CRYGND = 0 V;
5. Refer to V/I curves in Figure 1. Specification does not apply to PCICLK and RST# signals. Switching
6. Cumulative edge rate across specified range. Rise slew rates do not apply to open drain outputs.
7. Use Equation A in Figure below.
8. Use Equation B in Figure below.
Current High specification does not apply to PME#, CLKRUN#, and INTA# which are open drain outputs.
Vcc
2.4
1.4
x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x
-2
Equation A:
I
OH
DC
drive point
= 11.9 × (Vout - 5.25) × (Vout + 2.45)
AC
drive point
Parameter
for 3.3 V > Vout > 3.1 V
Pull Up
0.4 V - 2.4 V load
2.4 V - 0.4 V load
-44
Current (mA)
CIRRUS LOGIC PRODUCT DATA SHEET
2.2 > Vout > 0.55
Figure 1. AC Characteristics
1.4 < Vout < 2.4
3.1 < Vout < 3.3
0.71 > Vout > 0
0 < Vout
-176
-5 < Vin
point
test
Vout
(Note 5)
(Note 5)
(Note 6)
(Note 6)
1.4
2.2
0.55
Vcc
2.2
-1
x x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x x
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x x x x x x x x x x x x x x x x x x x x x x x
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x x x x x x x x x x x x x x x x x x x x x x x
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x x x x x x x x x x x x x x x x x x x x x x x
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x x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x x
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x x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x x
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x x x x x x x x x x x x x x x x x x x x x x x
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x x x x x x x x x x x x x x x x x x x x x x x
Equation B:
I
Symbol
OL
3, 6
DC drive
point
slew
slew
I
I
I
OH
= 78.5 × Vout × (4.4 - Vout)
OL
CL
for 0 V < Vout < 0.71 V
AC drive
point
r
f
–
CrystalClear™ PCI Audio Interface
–
44
Vout/0.023
25
Pull Down
95
+
Min
+
-44
Vout 1.4
-------------------------
95
1
1
-
-
Vin
----------------- -
Current (mA)
0.024
0.015
–
+
1
point
test
(Note 7)
(Note 8)
380
Max
5
5
-
-
-
-
-
DS308PP4
CS4281
V/ns
V/ns
Unit
mA
mA
mA
mA
mA