DS641F4

3

CS8421

TABLE OF CONTENTS

1. PIN DESCRIPTIONS ............................................................................................................................ 6

1.1 TSSOP Pin Descriptions ................................................................................................................ 6

1.2 QFN Pin Descriptions ..................................................................................................................... 8

2. CHARACTERISTICS AND SPECIFICATIONS ................................................................................... 10

SPECIFIED OPERATING CONDITIONS............................................................................................ 10

ABSOLUTE MAXIMUM RATINGS ...................................................................................................... 10

PERFORMANCE SPECIFICATIONS.................................................................................................. 11

DIGITAL FILTER CHARACTERISTICS .............................................................................................. 12

DC ELECTRICAL CHARACTERISTICS ............................................................................................. 12

DIGITAL INPUT CHARACTERISTICS................................................................................................ 13

DIGITAL INTERFACE SPECIFICATIONS .......................................................................................... 13

SWITCHING SPECIFICATIONS ......................................................................................................... 13

3. TYPICAL CONNECTION DIAGRAMS ................................................................................................15

4. APPLICATIONS .................................................................................................................................. 17

4.1 Three-wire Serial input/Output Audio Port .................................................................................... 17

4.2 Mode Selection ............................................................................................................................. 18

4.3 Sample Rate Converter (SRC) .. ................................................................................................... 20

4.3.1 Data Resolution and Dither .............................................................................................. 20

4.3.2 SRC Locking and Varispeed ............................................................................................ 20

4.3.3 Bypass Mode ................................................................................................................... 20

4.3.4 Muting .............................................................................................................................. 21

4.3.5 Group Delay and Phase Matching Between Multiple CS8421 Parts ............................... 21

4.3.6 Master Clock .................................................................................................................... 21

4.3.7 Clocking ........................................................................................................................... 22

4.4 Time Division Multiplexing (TDM) Mode ....................................................................................... 22

4.5 Reset, Power-Down, and Start-Up .. ............................................................................................. 23

4.6 Power Supply, Grounding, and PCB Layout ................................................................................ 24

5. PERFORMANCE PLOTS

................................................................................................................ 25

6. PACKAGE DIMENSIONS ................................................................................................................... 34

TSSOP THERMAL CHARACTERISTICS ........................................................................................... 34

QFN THERMAL CHARACTERISTICS................................................................................................ 35

7. ORDERING INFORMATION ............................................................................................................... 36

8. REVISION HISTORY .......................................................................................................................... 36