Tel : 886-2-29162151
Fax : 886-2-29174598
URL:
http://www.princeton.com.tw
Echo/Surround Processor
PT2398
PT2398 v1.3
Page 1
Written March 1998
Princeton Technology Corp.
Description
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
Tel : 886-2-29162151
Fax : 886-2-29174598
URL:
http://www.princeton.com.tw
Echo/Surround Processor
PT2398
PT2398 v1.3
Page 2
Written March 1998
Princeton Technology Corp.
Block Diagram
Pin Configuration
Tel : 886-2-29162151
Fax : 886-2-29174598
URL:
http://www.princeton.com.tw
Echo/Surround Processor
PT2398
PT2398 v1.3
Page 7
Written March 1998
Princeton Technology Corp.
PT2398 Echo Application Circuit
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.
Tel : 886-2-29162151
Fax : 886-2-29174598
URL:
http://www.princeton.com.tw
Echo/Surround Processor
PT2398
PT2398 v1.3
Page 8
Written March 1998
Princeton Technology Corp.
PT2398 Application Circuit (ERSO-compatible)
Note: The performance of PT2398 in this application circuit is similar to ES56033
Tel : 886-2-29162151
Fax : 886-2-29174598
URL:
http://www.princeton.com.tw
Echo/Surround Processor
PT2398
PT2398 v1.3
Page 9
Written March 1998
Princeton Technology Corp.
PT2398 Surround Application Circuit
28
27
26
25
24
23
22
21
20
19
18
17
16
15
PT2398
0.01uF
75K
0.33uF
0.01uF
7.5K
7.5K
75K
0.33uF
0.047uF
0.047uF
15K
15K
10K
560pF
5600pF
560pF
12K
10K
5600pF
15K
4.7uF
Input
100K
10uF 3K
Output
1
2
3
4
5
6
7
8
9
10
11
12
13
14
R
20K
+5V
+5V
+5V
47uF
0.1uF
100uF
0.1uF
100uF
AGND DGND
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
Package
PT2398
28 Pins, DIP (600 mil)
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