Princeton Technology Corp.
4-Channel Input Audio Processor IC
Description
Tel : 886-2-29162151
Fax : 886-2-29174598
URL:
http://www.princeton.com.tw
PT2314
PT2314 is a four-channel input digital audio processor utilizing CMOS Technology.
Volume, Bass, Treble and Balance are incorporated into a single chip. Loudness
Function and Selectable Input Gain are also provided to build a highly effective electronic
audio processor having the highest performance and reliability with the least external
components. All functions are programmable using the I
2
C Bus. The pin assignments and
application circuit are optimized for easy PCB layout and cost saving advantage for
audio application.
Features
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CMOS Technology
Least External Components
Treble and Bass Control
Loudness Function
4 Stereo Inputs with Selectable Input Gain
Input/Output for External Noise Reduction System/Equalizer
2 Independent Speaker Controls for Balance Control
Independent Mute Function
Volume Control in 1.25 dB/step
Low Distortion
Low Noise and DC Stepping
Controlled by I
2
C Bus Micro-Processor Interface
Available in 28 Pins, DIP/SO Package
Applications
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Car Stereo (Audio)
Hi-Fi Audio System
Note: Purchase of I
2
C Component of Princeton Technology Corporation (PTC) conveys a license under Philips I
2
C
Patent Right to use these components in any I
2
C System, provided that the system conforms to the I
2
C Standard
Specification defined by Philips
PT2314 v1.1
Page 1
Revised March 1999
Princeton Technology Corp.
4-Channel Input Audio Processor IC
Application Circuit
R2
5 .6 K
C 11
2 .2 u
MCU
+
C5
2 .2 u
A M /F M
Tu ner
25
+ R
11 R IN 1
+ R
1 6 L IN 1
26
27
18
LOUT
17
L IN
12
LO U D _L
20
BO U T_L
C13
1 0 0n
Tel : 886-2-29162151
Fax : 886-2-29174598
URL:
http://www.princeton.com.tw
PT2314
C16
1 0 0n
C17
1 0 0n
C19
2 .7 n
19
B IN _L
3
TR EB _L
10u
C20
O U T_R
23
+
D G N D D ATA C L K
C 1 2 .2 u
C 6 2.2 u+
R
CD
P lay er
10
+ R
15
C 2 2 .2 u
+ R
9
Tape
C 7 2 .2 u
+ R
1 4 L IN 3
C 3 2 .2 u
+ R
8
A ux
C 8 2 .2 u
+
C 4 2 .2 u
R
1 3 L IN 4
VDD
1
AGND
2
REF
28
+
VDD
22u
C9
ROUT
6
R IN
5
+
2 .2 u
C10
1 0 0n
C12
1 0 0n
C14
1 0 0n
C15
LO U D _R
7
B O U T_R
22
R IN 4
R IN 3
R IN 2
L IN 2
PT2314
21
10u
C21
O U T_L
24
+
B IN _ R
TREB_R
4
2 .7 n
C18
5 .6 K
R1
Note: 1. It is suggested that you use Mylar Capacitor for capacitors, C12 ~ C19.
2.
3.
Resistor ( R ) Range = 2.0 K Ohms to 3.6 K Ohms
Recommended Value of Resistor ( R ) = 2.4 K Ohms
PT2314 v1.1
Page 3
Revised March 1999
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