Princeton Technology Corp.
Tel: 886-2-29162151
Fax: 886-2-29174598
URL:
http://www.princeton.com.tw
Echo IC with Built-in Microphone Amplifier & Output Mixer
DESCRIPTION
PT2390
PT2390 is a digital echo IC utilizing CMOS Technology. Microphone Amplifier, Output Mixer, internal
44K RAM and Vocal Switch are all integrated in a single chip to provide a digital echo IC of the the highest
standard. Very low distortion and high S/N Ratio qualities, not to mention the built-in VCO feature which
eliminates the need for an external crystal oscillator are just some of the features of PT2390. Pin assign-
ments and application circuit are optimized for easy PCB Layout and low cost effectiveness.
FEATURES
CMOS Technology
Least External Component
5V Power Supply
2 Microphone Amplifier and KARAOKE Automatic Vocal Changer
Built-in 44K RAM
Built-in VCO, eliminating the need for a crystal oscillator
Low Total Harmonic Distortion
: Microphone Pre-Amplifier <0.09% (typ.)
: Echo Processor < 0.5% (typ.)
鈥?High S/N Ratio
: Microphone Pre-Amplifier > 85 (no - weighting)
: Echo Processor > 80 dB (no - weighting)
鈥?Available in 28-pin, DIP or SO Package
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APPLICATIONS
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DVD, VCD
KARAOKE
VCR
Mini Compo
Other Audio Equipments
Ref. No. 2390 v1.1
1
Written July 1999
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