CS4281 Datasheet, PDF (4/36 Pages) Cirrus Logic – CrystalClear PCI Audio interface

CS4281
CrystalClear™ PCI Audio Interface
AC CHARACTERISTICS (PCI SIGNAL PINS ONLY)
(T_A = 70° C; PCIVDD = CVDD = VAUX = CRYVDD = 3.3 V; VDD5REF = 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))
Parameter
Switching Current High
(Note 5)
0 < Vout ≤ 1.4
1.4 < Vout < 2.4
Symbol
I_OH
Switching Current Low
Low Clamp Current
3.1 < Vout < 3.3
(Note 5) I_OL
Vout ≥ 2.2
2.2 > Vout > 0.55
0.71 > Vout > 0
-5 < Vin ≤ -1 I_CL
Output rise slew rate
Output fall slew rate
0.4 V - 2.4 V load
2.4 V - 0.4 V load
(Note 6) slew_r
(Note 6) slew_f
Min
-44
– 44 + -^V----^o---^u---^t---^–-----¹---^.-⁴--
0.024
-
95
Vout/0.023
-
– 25 + ^V-----ⁱ--ⁿ----⁺-----¹-
0.015
1
1
Max
-
-
(Note 7)
-
-
(Note 8)
-
5
5
Unit
mA
mA
mA
mA
mA
V/ns
V/ns
Notes: 4. Specifications guaranteed by characterization and not production testing.
5. Refer to V/I curves in Figure 1. Specification does not apply to PCICLK and RST# signals. 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.
7. Use Equation A in Figure below.
8. Use Equation B in Figure below.
Pull Up
Vcc
2.4
Vcc
test
point
2.2
AC drive
point
Pull Down
DC
1.4
drive point
AC
drive point
DC drive
point
0.55
test
point
-2
-44
-176
Current (mA)
Equation A:
I_OH = 11.9 × (Vout - 5.25) × (Vout + 2.45)
for 3.3 V > Vout > 3.1 V
3, 6
95 _{Current (mA)} 380
Equation B:
I_OL = 78.5 × Vout × (4.4 - Vout)
for 0 V < Vout < 0.71 V
Figure 1. AC Characteristics
CIRRUS LOGIC PRODUCT DATA SHEET
4
DS308PP4