UPC1857A Datasheet, PDF (1/44 Pages) NEC – SOUND CONTROL IC WITH SURROUND AND I2C BUS

DATA SHEET
BIPOLAR ANALOG INTEGRATED CIRCUIT
µPC1857A
SOUND CONTROL IC WITH SURROUND AND I²C BUS
DESCRIPTION
The µPC1857A is a sound control IC with I²C bus.
It has functions to control volume, balance, and tone, and a phase shift matrix surround function.
The surround function achieves wide sound expansion using only two front speakers. Three modes can be
selected: movie mode that increases the presence of sound with stereo sound input, music mode emphasizing vocal
music, and simulated mode that gives expansion and left and right sound depth with monaural sound input.
The µPC1857A can perform all control (mode switching, volume control and so on) using I²C.
FEATURES
• Volume control function
: Attenuation adjustable from 0 to −80 dB in 64 steps
• Balance control function
: The difference in attenuation adjustable from 0 to −80 dB in 64 steps
• Tone (bass, treble) control function : Adjustable in 32 steps from +10 to −10 dB
• Surround function (gain adjustable) : Three modes (movie, music, and simulated)
• Mute function
• Mixing function
• Output selection function (for two mono channels input)
• All parameters can be controlled via I²C bus.
APPLICATIONS
• TV, PC monitor
ORDERING INFORMATION
Part Number
Package
µPC1857ACT 30-pin plastic shrink DIP (400 mil)
The information in this document is subject to change without notice.
Document No. S12453EJ1V1DS00 (1st edition)
Date Published March 1998 N CP(K)
Printed in Japan
©
1997