QS7777 Datasheet, PDF (1/11 Pages) Nippon Precision Circuits Inc – QSurround 3D Virtual Audio Processor for Dolby AC-3 and ProLogic

NIPPON PRECISION CIRCUITS INC.
QS7777PF/CF
QSurround™ 3D Virtual Audio Processor
for Dolby AC-3 and ProLogic
OVERVIEW
The QS7777PF/CF is an audio processor IC which
implements the QSurround™ technology developed
and licensed by QSound Labs, Inc. It processes
Dolby Digital (AC-3) and Dolby Surround audio sig-
nals to produce enhanced virtual 3D sounds, even for
2-speaker systems. It can generate 2, 3, 4, and 5-
channel speaker configurations, all with enhanced
surround signal outputs.
FEATURES
s Enhanced surround signal from Dolby Digital
(AC-3) and Dolby Surround (ProLogic) input sig-
nals
s 2-step adjustable sound enhancement
s Supported speaker configurations
• Dolby Digital (AC-3) 6-channel signals to 2, 3,
4, 5-channel speaker QSurround signal configu-
rations
• Dolby Surround (ProLogic) 4-channel signals
to 2, 3, 4-channel speaker QSurround signal
configurations
s Monaural to virtual stereo conversion
s Parallel and 2 serial interface control modes
selectable
• QS7777CF: I²C bus 2-wire serial interface¹
• QS7777PF: 3-wire serial interface (Data, Clock,
Strobe)
s 5 to 13V analog supply
s 4.5 to 5.5V digital supply
s 48-pin QFP package
1. NPC employs I²C bus serial interface components
under license from Philips, and conforms to the Phil-
ips I²C bus specifications.
PINOUT
QS7777PF
Top view
QXDC2 37
QXDC3 38
QXDC4 39
FLIN 40
FRIN 41
CIN 42
SUBIN 43
RLIN 44
RRIN 45
MSC4 46
MSC5 47
MSC6 48
QS7777PF
24 QXAC4
23 QXAC3
22 QXAC2
21 QXAC1
20 FLOUT
19 FROUT
18 COUT
17 RLOUT
16 RROUT
15 VDD
14 P/S
13 BYP
QS7777CF
Top view
APPLICATIONS
s DVD and laser disk players
s TV and AV equipment
s Multimedia products (including sound cards)
s Car audio
ORDERING INFORMATION
Device
QS7777PF
QS7777CF
Package
48-pin QFP
48-pin QFP
QXDC2 37
QXDC3 38
QXDC4 39
FLIN 40
FRIN 41
CIN 42
SUBIN 43
RLIN 44
RRIN 45
MSC4 46
MSC5 47
MSC6 48
QS7777CF
24 QXAC4
23 QXAC3
22 QXAC2
21 QXAC1
20 FLOUT
19 FROUT
18 COUT
17 RLOUT
16 RROUT
15 VDD
14 P/S
13 BYP
I²C bus is a registered tra d e m a r k of Philips Electronics N.V.
Dolby and the double-D symbol are registered trademarks of Dolby Laboratories Licensing Corporation.
NIPPON PRECISION CIRCUITS—1