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PDF HT8955A Data sheet ( Hoja de datos )
| Número de pieza | HT8955A | |
| Descripción | Voice Echo | |
| Fabricantes | Holtek Semiconductor Inc | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de HT8955A (archivo pdf) en la parte inferior de esta página. Total 7 Páginas | ||
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HT8955A
Voice Echo
Features
• Operating voltage: 5.0V
• Long delay time
– 0.8 seconds (SEL=VSS, 256K DRAM)
– 0.2 seconds (SEL=VDD/open, 64K DRAM)
• 25kHz sampling rate
• Continuous variable delay time
• Built-in pre-amplifier
• Low distortion
• High S/N ratio
• Wide frequency response
• PCM 10-bit A/D and D/A converters
• 24-pin DIP package
Applications
• Mixers
• Karaoke systems
• Echo generators
• Sound effect generators
General Description
The HT8955A is a CMOS LSI digital audio
signal delay processor. It is designed for
audio system applications including echo
generators, karaoke systems, sound effect
generators, etc.
The chip consists of a built-in pre-amplifier,
on-chip oscillator, DRAM interface, 10-bit A/D
and D/A converters as well as control logic. It
provides continuously adjustable delay time up
to 0.8/0.2 seconds at a sampling rate of 25kHz
when combined with an external DRAM
(41256/4164). The HT8955A is superior to a
conventional BBD delay unit in its low distor-
tion, high S/N ratio and long delay time. Its
sophisticated low pass filter will not end in the
normal applications due to the high sampling
rate (25~50kHz). Hence, the HT8955A is excel-
lent for audio delay system applications. It is
offered in a 24-pin dual-in-line package.
Pin Assignment
Block Diagram
1 5th May ’98
1 page  
Application Circuits
Low cost echo
HT8955A
5 5th May ’98
5 Page | ||
| Páginas | Total 7 Páginas | |
| PDF Descargar | [ Datasheet HT8955A.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| HT8955 | Voice Echo | Holtek Semiconductor Inc |
| HT8955A | Voice Echo | Holtek Semiconductor Inc |
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