DS308PP4

5

CS4281

CrystalClear™ PCI Audio Interface

CIRRUS LOGIC PRODUCT DATA SHEET

PCIGND = CGND = CRYGND = 0 V; all voltages with respect to 0 V unless otherwise noted)

Notes: 9. The following signals are tested to 6 mA: FRAME#, TRDY#, IRDY#, DEVSEL#, STOP#, PERR#, and

INTA#. All other PCI interface signals are tested to 3 mA.

10. Input leakage currents include hi-Z output leakage for all bi-directional buffers with three-state outputs.

11. Maximum allowable leakage into the PME# open-drain pin when power is removed from VAUX.

Assumes no event occurred to drive PME# (idle state).

12. For AC-Link and VOLUP/DN pins, Vdd is VAUX. For all others Vdd is the core supply.

13. For open drain pins, high level output voltage is dependent on external pull-up used and number of

attached gates.

14. All inputs that do not include internal pull-ups or pull-downs, must be externally driven for proper

operation. If an input is not driven, it should be tied to power or ground, depending on the particular

function. If an I/O pin is not driven and programmed as an input, it should be tied to power or ground

through its own resistor.

Parameter

Symbol

Min

Typ

Max

Unit

PCI Interface Signal Pins

High level input voltage

2-

5.75

V

Low level input voltage

-0.5

-

0.8

V

High level output voltage

Iout = -2 mA

2.4

-

-

V

Low level output voltage

Iout = 3 mA, 6 mA

(Note 9)

--

0.55

V

High level leakage current

Vin = 2.7 V

(Note 10)

--

70

µA

Low level leakage current

Vin = 0.5 V

--

-70

µA

PME# power off input leakage Vin = 5.25 V

(Note 11)

--

1

µA

Non-PCI Interface Signal Pins

(Note 12)

High level output voltage

Iout = -5 mA

(Note 13)

0.9

×Vdd

-

V

Low level output voltage

Iout = 5 mA

-0.1

×Vdd

V

High level input voltage

(Note 14)

0.65

×Vdd

Vdd+0.3

V

Low level input voltage

(Note 14)

-0.3

0.35

×Vdd

V

High level leakage current

Vin = 3.6 V

(Note 14)

-10

µA

Low level leakage current

Vin = 0

(Note 14)

--10

µA

Parameter

Min

Typ

Max

Unit

Power Supply Pins (Outputs Unloaded)

Power Supply Current:

VDD5REF

VAUX

PCIVDD/CVDD/CRYVDD Total

(Note 4)

-

-

-

0.6

TBD

TBD

-

20

TBD

mA

mA

mA

Low Power Mode Supply Current

-

TBD

-

mA