Ref. No. 2395 v1.1
1
Written Dec. 1998
Enhanced Digital Echo IC
Tel: 886-2-66296288
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
PT2395
DESCRIPTION
PT2395 is a silicon gate CMOS-processed digital echo IC functionally compatible with M50195P.
Input signal to PT2395 is converted to digital signal with A-D conversion then stored in the memory
(DRAM) chip. After a certain delay time, digital signal is read out from the memory chip and then
converted back into analog signal using the D-A conversion. A low cost echo system may thus be
achieved with PT2395's A-D converter, D-A converter, incorporating ADM algorithm, while main-
taining lower noise, lower distortion, higher S/N ratio as compared to the conventional BBD (Bucket
Brigate Device). PT2395 further features enhanced functions such as continuous delay time with
external VR (Variable Resistor), 256 K DRAM support for longer delay time (Extended Delay Mode,
up to 800 ms at 4 MHz Clock) as compared to M50195P. Moreover, the distortion and the S/N Ratio
are further improved.
FEATURES
CMOS Technology
Available in 40-pin PDIP Package (600 mil)
Low Noise, Low Distortion Echo System
3-Level Delay Time Selectable, with Indicator Output
On-chip RC Oscillator for Continuous Delay Time
64K/256K DRAM chip support
Extended Delay Mode up to 800 ms Delay Time (without VR)
Create fascinating echo effect with time delay
APPLICATIONS
KARAOKE
Radio Set
Video Disc Player
Electronic Musical Instrument
PDF 
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