Advanced Information

WM8740

WOLFSON MICROELECTRONICS LTD

AI Rev 1.7 July 2000

3

PIN

NAME

TYPE

DESCRIPTION

Hardware Mode

Normal Mode

Differential Mode

8X Mode

Software

Mode

23

CSBIWO

Digital input

Internal pull-down

Wordlength:

Low for 16-bit data.

High for 20-bit

(normal) or 24-bit

I

Wordlength:

Low for 16-bit data.

High for 20-bit

(normal) or 24-bit

I

Wordlength:

Low for 20-bit data.

High for 24-bit data.

Low for

serial

interface

operation.

24

MODE

Digital input

Internal pull-up

Low for hardware

mode.

Low for left

mono mode.

High for right

mono mode

DINR

High for

software

mode.

25

MUTEB

Digital input

Internal pull-up

Low to soft mute.

High for normal

operation.

Low to soft mute.

High for normal

operation.

Low to soft mute.

High for normal

operation.

Low to

soft mute.

High for

normal

operation.

26

MD/DM0

Digital input

Internal pull-up

De-emphasis mode

select bit 0.

Low for no

de-emphasis.

High for 44.1kHz

de-emphasis.

LRP – LRCLK

polarity select.

Control serial

interface

data signal.

27

MC/DM1

Digital input

Internal pull-up

De-emphasis mode

select bit 1.

Low for normal filter

operation.

High for filter slow

roll-off.

Unused.

Leave unconnected.

Control serial

interface

clock signal.

28

ML/I2S

Digital input

Internal pull-up

Audio serial format:

Low – right justified.

High – I

Audio serial format:

Low – right justified.

High – I

Input data format:

Low – right justified.

High – left justified.

Control serial

interface

load signal.

Note:

Digital input pins have Schmitt trigger input buffers.

ABSOLUTE MAXIMUM RATINGS

Absolute Maximum Ratings are stress ratings only. Permanent damage to the device may be caused by continuously operating at

or beyond these limits. Device functional operating limits and guaranteed performance specifications are given under Electrical

Characteristics at the test conditions specified

ESD Sensitive Device. This device is manufactured on a CMOS process. It is therefore generically susceptible

to damage from excessive static voltages. Proper ESD precautions must be taken during handling and storage

of this device.

CONDITION

MIN

MAX

Supply voltage

-0.3V

+7.0V

Reference input

VDD + 0.3V

-25°C+85°C

Storage temperature

-65°C

+150°C

Package body temperature (soldering, 10 seconds)

+240°C

Package body temperature (soldering, 2 minutes)

+183°C