Princeton Technology Corp.
Tel : 886-2-29162151
Fax : 886-2-29174598
URL:
http://www.princeton.com.tw
Echo/Surround Processor
Description
PT2398
PT2398 is an echo/surround audio processor IC utilizing CMOS Technology and is
functionally compatible with ES56028. Equipped with ADC and DAC, it uses digital
processing to generate the delay time, which in turn, can be controlled manually or by a micro
controller. PT2398 also features an internal VCO circuit in the system clock, thereby, making
the frequency easily adjustable. The pin assignments and application circuit are optimized for
easy PCB layout and cost saving advantage.
Features
r
CMOS Technology
r
Least External Components
r
Auto Muting Function
r
Auto Reset Function
r
Low Noise
r
Low Distortion
r
Wide Range Time Delay Settings
r
Can be Controlled Manually or by Micro Controller
r
External Adjustable VCO
r
Very Low Operating Current (Typ. 30 mA)
Applications
r
Video Tape Recorder
r
Video Compact Disk
r
Television
r
CD Player
r
Car Stereo
r
KARAOKE Mixer
r
Electronic Musical Instrument
r
Audio Equipment with Echo/Surround Processor
PT2398 v1.3
Page 1
Written March 1998
Princeton Technology Corp.
Tel : 886-2-29162151
Fax : 886-2-29174598
URL:
http://www.princeton.com.tw
Echo/Surround Processor
Block Diagram
PT2398
Pin Configuration
PT2398 v1.3
Page 2
Written March 1998
Princeton Technology Corp.
Tel : 886-2-29162151
Fax : 886-2-29174598
URL:
http://www.princeton.com.tw
Echo/Surround Processor
PT2398 Echo Application Circuit
PT2398
Note:
External Resistor having a value of 10 K Ohms to 50 K Ohms may be
used. The recommended Resistor Value ( R ) is 10 K Ohms. When the value of
the Resistor ( R ) increases, the range of the Delay Time also increases.
PT2398 v1.3
Page 7
Written March 1998
Princeton Technology Corp.
Tel : 886-2-29162151
Fax : 886-2-29174598
URL:
http://www.princeton.com.tw
Echo/Surround Processor
PT2398 Application Circuit (ERSO-compatible)
PT2398
Note: The performance of PT2398 in this application circuit is similar to ES56033
PT2398 v1.3
Page 8
Written March 1998
Princeton Technology Corp.
Tel : 886-2-29162151
Fax : 886-2-29174598
URL:
http://www.princeton.com.tw
Echo/Surround Processor
PT2398 Surround Application Circuit
5600pF
15K
PT2398
4.7uF
Input
100K
+5V
0.1uF
100uF
47uF
20K
R
+5V
0.1uF
100uF
+5V
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
10K
560pF
12K
10uF
560pF
15K 10K
0.047uF
AGND
DGND
3K
Output
15K
5600pF
0.047uF
7.5K
75K
7.5K
0.01uF
0.33uF
0.33uF
75K
0.01uF
PT2398
Note: External Resistor having a value of 10 K Ohms to 50 K Ohms may be used. The
recommended Resistor Value ( R ) is 10 K Ohms. When the value of the Resistor ( R )
increases, the range of the Delay Time also increases.
Order Information
Part Number
PT2398
Package
28 Pins, DIP (600 mil)
PT2398 v1.3
Page 9
Written March 1998
微控制器 MCU
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