SM5956AF 参数 Datasheet PDF下载

SM5956A

6-channel Asynchronous Sample Rate Converter

OVERVIEW

The SM5956A is a digital audio signal, asynchronous sample rate converter LSI. It reads 6-channel 16/20/24-

bit word length input data, and 16/20/24-bit word length output data. It also features a built-in digital deempha-

sis filter, direct muting and digital audio interface output.

FEATURES

Functions

I

PINOUT

(Top view)

OMOD0

OMOD1

OWL0

OWL1

BCKO

LRCO

DITO

26

I

I

I

I

I

I

I

I

I

I

I

I

I

I

L/R 6-channel processing

(2-channel stereo, 3-system processing)

Input sample rate range: 10kHz to 200kHz

Output sample rate range: 30kHz to 50kHz

Operating sample rate conversion ratio (fso/fsi)

*1

• 0.45 to 4.41 (SCKSLN = L, 512fso operation)

• 0.225 to 4.41 (SCKSLN = H, 768fso operation)

*1

: fsi = input sample rate

fso = output sample rate

Asynchronous input timing and output timing

clock inputs

System clock input

• Input system clock: 1fsi (LRCI)

• Output-system clock: 512fso/768fso

(input on SCK)

Deemphasis filter function

• IIR filter structure

• 44.1kHz, 48kHz, 32kHz input sample rate fsi

compatible

Direct mute function

Through mode

• Input data passed directly to the outputs

Digital audio interface output

• DIA input data undergoes sample rate conver-

sion and is output biphase mark encoded

Output data clocks (LRCO, BCKO)

• LRCO rate: 1fso

• BCKO rate: 64fso (SCKSLN = L, 512fso operation)

48fso (SCKSLN = H, 768fso operation)

• Slave mode: Data is output at a rate dictated by

an externally input signal

• Master mode: Sample rate is generated internally

from the output-system clock, and

supplied as an output

MCU interface

• 3-wire serial interface

5V tolerant inputs for direct connection to 5V

devices

3.3V single supply

Package: 48-pin QFP

DOC

DOA

DOB

36

35

34

33

32

31

30

29

28

27

25

VDD

VSS

VDD

TEST0

TEST1

TEST2

TEST3

SCK

VSS

SCKSLN

ERROR

RSTN

SELFN

VSS

37

38

39

40

41

42

43

44

45

46

47

48

24

23

22

21

20

19

18

17

16

15

14

13

VSS

OEDITON

SLAVEN

THROUN

DMUTEN

MLE

MDT

MCK

FS1

FS0

DEEMN

VDD

IMOD1

10

TEST4

11

PACKAGE DIMENSIONS

(Unit: mm)

9 ± 0.4

7 ± 0.1

+ 0.075

0.125

−

0.025

7 ± 0.1

9 ± 0.4

IMOD0

IWL0

BCKI

IWL1

LRCI

VDD

VSS

12

1

2

3

4

5

6

7

8

DIA

DIB

DIC

9

1.4 ± 0.1

1.7 MAX

0 ~ 10

+ 0.09

0.18

−

0.05

Note. Dimensions without tolerance are reference values.

ORDERING INFORMATION

Device

SM5956AF

Package

48-pin QFP

0.1

0.5

0.08

SEIKO NPC CORPORATION —1

0.5 ± 0.2