LM4937

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SNAS369J – OCTOBER 2006 – REVISED MAY 2013

PIN DESCRIPTIONS

Pin

Pin Name

Digital/An

I/O, Power

Description

alog

A1

DGND

D

P

DIGITAL GND

A2

MCLK

D

I

MASTER CLOCK

A3

I2S_WS

D

I/O

I2S WORD SELECT

A4

SDA/SDI

D

I/O

I2C SDA OR SPI SDI

A5

DVDD

D

P

DIGITAL SUPPLY VOLTAGE

A6

VDD_IO

D

P

I/O SUPPLY VOLTAGE

B1

PLL_VDD

D

P

PLL SUPPLY VOLTAGE

B2

I2S_SDATA

D

I

I2S SERIAL DATA INPUT

B3

I2S_CLK

D

I/O

I2S CLOCK SIGNAL

B4

GPIO

D

O

TEST PIN (MUST BE LEFT FLOATING)

B5

I2C_VDD

D

P

I2C SUPPLY VOLTAGE

B6

SDL/SCK

D

I

I2C_SCL OR SPI_SCK

C1

PLL_GND

D

P

PLL GND

C2

PLL_OUT

D

O

PLL FILTER OUTPUT

C3

PLL_IN

D

I

PLL FILTER INPUT

C4

ADDR/ENB

D

I

I2C ADDRESS OR SPI ENB DEPENDING ON MODE

C5

BYPASS

A

I

HALF-SUPPLY BYPASS

C6

AVDD

A

P

ANALOG SUPPLY VOLTAGE

D1

AGND

A

P

ANALOG GND

D2

AGND

A

P

ANALOG GND

D3

NC

NO CONNECT

D4

MODE

D

I

SELECTS BETWEEN I2C OR SPI CONTROL

D5

RHP

A

O

RIGHT HEADPHONE OUTPUT

D6

CHP

A

O

HEADPHONE CENTER PIN OUTPUT (1/2 VDD or GND)

E1

DIFF_

A

I

ANALOG NEGATIVE DIFFERENTIAL INPUT

E2

LIN

A

I

ANALOG LEFT CHANNEL INPUT

E3

RIN

A

I

ANALOG RIGHT CHANNEL INPUT

E4

NC

NO CONNECT

E5

LHP

A

O

LEFT HEADPHONE OUTPUT

E6

AGND

A

P

ANALOG GND

F1

DIFF+

A

I

ANALOG POSITIVE DIFFERENTIAL INPUT

F2

EP_

A

O

MONO EARPIECE-

F3

EP+

A

O

MONO EARPIECE+

F4

LS-

A

O

LOUDSPEAKER OUT-

F5

AVDD

A

P

ANALOG SUPPLY VOLTAGE

F6

LS+

A

O

LOUD SPEAKER OUT+

These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam

during storage or handling to prevent electrostatic damage to the MOS gates.

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