alc250-lf Realtek Semiconductor Corporation, alc250-lf Datasheet - Page 9

• Manufacturer Part Number: alc250-lf
• Description: Two-channel Ac?97 2.3 Audio Codec With Equalizer
• Manufacturer: Realtek Semiconductor Corporation

5. Pin Descriptions
In order to reduce pin count, and therefore size and cost, some pins have multiple functions. In those cases, the functions are
separated with a “/” symbol. Refer to the Pin Assignment diagram for a graphical representation.
5.1 Digital I/O Pins
5.2 Analog I/O Pins
Two-Channel AC’97 2.3 Audio Codec
SPDIFI/EAPD
LINE-OUT-L
LINE-OUT-R
SDATA-OUT
SDATA-IN
DISABLE#
(D version)
(D version)
(D version)
(B version)
(B version)
XTL-OUT
LINE-IN-R
LINE-IN-L
BIT-CLK
XELSEL
PC-BEEP
RESET#
SPDIFO
CD-GND
XTL-IN
PHONE
AUX-L
AUX-R
SYNC
Name
SCK
SDA
SCK
SDA
CD-L
CD-R
MIC1
MIC2
JD2
JD1
Name
Type Pin No
I/O
Type Pin No
IO
IO
O
O
O
O
I
I
I
I
I
I
I
I
IO
IO
O
O
I
I
I
I
I
I
I
I
I
I
I
10
43
44
43
44
45
46
47
48
11
2
3
6
5
8
12
13
14
15
16
17
18
19
20
21
22
23
24
35
36
Serial TDM AC’97 Codec
AC'97 H/W reset
Crystal input pad
Crystal output pad
Sample Sync (48KHz)
12.288MHz bit clock output
Serial TDM input from
AC’97 controller
output
Serial bit clock input
Serial data input/output
Pulled low to disable
ACLINK signals.
Serial bit clock input
Serial data input/output
Pulled low to use external
14.318MHz clock source
S/PDIF input / External
Amplifier power down
control
S/PDIF output
PC speaker input
Speakerphone input
AUX Left channel
AUX Right channel
Jack Detect pin-2
Jack Detect pin-1
CD audio Left channel
CD audio analog GND
CD audio Right channel
First MIC input
Second MIC input
Line input Left channel
Line input Right channel
Line-Out Left channel
Line-Out Right channel
Description
Description
4
Schmitt trigger input
Schmitt trigger input, V
Schmitt trigger input, V
Schmitt trigger input
Crystal: 24.576M/14.318M crystal input
External: 24.576M/14.318M external clock input
Crystal: 24.576M/14.318M crystal output
External: 24.576M/14.318M clock output
CMOS output
CMOS input , Vt=1.65V
CMOS output
Schmitt trigger input, V
Schmitt trigger input, V
(SDATA-IN and BITCLK are driven low)
Schmitt trigger input, V
CMOS input, Vt=0.35Vdd, internally pulled high by a 50K
resistor.
CMOS input / output
Digital output has 12 mA@75Ω driving capability.
Analog input (1.6Vrms)
Analog input (1.6Vrms)
Analog input/output
Analog input/output
Internally pulled high to AVDD by a 50K resistor
Internally pulled high to AVDD by a 50K resistor
Analog input (1.6Vrms)
Analog input
Analog input (1.6Vrms)
Analog input (1.6Vrms)
Analog input (1.6Vrms)
Analog input (1.6Vrms)
Analog input (1.6Vrms)
Analog output w/o amplifier
Analog output w/o amplifier
Characteristic Definition
Characteristic Definition
Total: 12 Pins
IL
IL
IL
IL
IL
=1.0V, V
=1.0V, V
=1.0V, V
=1.0V, V
=1.0V, V
ALC250 DataSheet
IH
IH
IH
IH
IH
=2.0V
=2.0V
=2.0V
=2.0V
=2.0V
Rev1.3