WM8740
Production Data
PIN
NAME
TYPE
DESCRIPTION
Hardware Mode
Normal Mode
Software
Mode
Differential Mode
8X Mode
Wordlength:
Wordlength:
Wordlength:
Low for 20-bit data.
High for 24-bit data.
Low for
serial
interface
operation.
23
CSBIWO
Digital input
Low for 16-bit data.
High for 20-bit
(normal) or 24-bit
I2S data.
Low for 16-bit data.
High for 20-bit
(normal) or 24-bit
I2S data.
Internal pull-down
24
25
MODE
Digital input
Low for hardware
mode.
Low for left
mono mode.
DINR
High for
software
mode.
Internal pull-up
High for right
mono mode
MUTEB
Digital input
Low to soft mute.
Low to soft mute.
Low to soft mute.
Low to
soft mute.
Internal pull-up
High for normal
operation.
High for normal
operation.
High for normal
operation.
High for
normal
operation.
26
27
28
MD/DM0
MC/DM1
ML/I2S
Digital input
De-emphasis mode
select bit 0.
Low for no
de-emphasis.
LRP – LRCLK
polarity select.
Control serial
interface
data signal.
Internal pull-up
High for 44.1kHz
de-emphasis.
Digital input
De-emphasis mode
select bit 1.
Low for normal filter
operation.
Unused.
Control serial
interface
clock signal.
Internal pull-up
Leave unconnected.
High for filter slow
roll-off.
Digital input
Audio serial format:
Low – right justified.
High – I2S.
Audio serial format:
Low – right justified.
High – I2S.
Input data format:
Low – right justified.
High – left justified.
Control serial
interface
load signal.
Internal pull-up
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.
Wolfson tests its package types according to IPC/JEDEC J-STD-020B for Moisture Sensitivity to determine acceptable storage
conditions prior to surface mount assembly. These levels are:
MSL1 = unlimited floor life at <30°C / 85% Relative Humidity. Not normally stored in moisture barrier bag.
MSL2 = out of bag storage for 1 year at <30°C / 60% Relative Humidity. Supplied in moisture barrier bag.
MSL3 = out of bag storage for 168 hours at <30°C / 60% Relative Humidity. Supplied in moisture barrier bag.
CONDITION
MIN
-0.3V
MAX
+7.0V
Supply voltage
Input
GND -0.3V
VDD + 0.3V
Operating temperature range, TA
Storage temperature prior to soldering
Storage temperature after soldering
°
°
-25 C
+85 C
30°C max / 85% RH max
-65°C
+150°C
Note: It is strongly recommended that AVDD, AVDDL and AVDDR are tied together. AGND, AGNDL and AGND right
must also be tied together.
PD Rev 4.0 April 2004
w
5
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
