LM4548A National Semiconductor, LM4548A Datasheet - Page 9

• Manufacturer Part Number: LM4548A
• Description: 2 Multi-Channel Audio Codec
• Manufacturer: National Semiconductor

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Connection Diagram
Pin Descriptions
PC_BEEP
PHONE
Name
Pin
12
13
I / O
I
I
Functional Description
Mono Input
This line level (1 Vrms nominal) mono input is mixed equally into both channels of the Stereo
Mix signal at MIX2 under the control of the PC_Beep Volume control register, 0Ah. The
PC_BEEP level can be muted or adjusted from 0 dB to -45 dB in 3 dB steps. The Stereo Mix
signal feeds both the Line Out and Line Level Out analog outputs and is also selectable at
the Record Select Mux.
Mono Input
This line level (1 Vrms nominal) mono input is mixed equally into both channels of the Stereo
Mix signal at MIX2 under the control of the Phone Volume register, 0Ch. The PHONE level
can be muted or adjusted from +12 dB to -34.5 dB in 1.5 dB steps. The Stereo Mix signal
feeds both the Line Out and Line Level Out analog stereo outputs and is also selectable at
the Record Select Mux.
See NS Package Number VBH48A
Order Number LM4548AVH
ANALOG I/O
Top View
9
20030002
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