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QS7777PF/CF
NIPPON PRECISION CIRCUITS INC.
QSurroundTM 3D Virtual Audio Processor for Dolby AC-3 and ProLogic
OVERVIEW
The QS7777PF/CF is an audio processor IC which implements the QSurroundTM technology developed and licensed by QSound Labs, Inc. It processes Dolby Digital (AC-3) and Dolby Surround audio signals to produce enhanced virtual 3D sounds, even for 2-speaker systems. It can generate 2, 3, 4, and 5channel speaker configurations, all with enhanced surround signal outputs.
FEATURES
s
PINOUT
QS7777PF
Top view
QXDC1 QXCC4 QXCC3 QXCC2 QXCC1 QXBC5 QXBC4 QXBC3 QXBC2
27
s
36
35
34
33
32
31
VCC
30
29
28
26
QXDC2 QXDC3 QXDC4 FLIN FRIN CIN SUBIN RLIN RRIN MSC4 MSC5 MSC6
25
QXAC5
24 23 22 21 20 19
QXBC1
s
s s
s s s
Enhanced surround signal from Dolby Digital (AC-3) and Dolby Surround (ProLogic) input signals 2-step adjustable sound enhancement Supported speaker configurations * Dolby Digital (AC-3) 6-channel signals to 2, 3, 4, 5-channel speaker QSurround signal configurations * Dolby Surround (ProLogic) 4-channel signals to 2, 3, 4-channel speaker QSurround signal configurations Monaural to virtual stereo conversion Parallel and 2 serial interface control modes selectable * QS7777CF: I2C bus 2-wire serial interface1 * QS7777PF: 3-wire serial interface (Data, Clock, Strobe) 5 to 13V analog supply 4.5 to 5.5V digital supply 48-pin QFP package
1. NPC employs I2C bus serial interface components under license from Philips, and conforms to the Philips I2C bus specifications.
37 38 39 40 41 42 43 44 45 46 47 48 10 11 12 1 2 3 4 5 6 7 8 9
QXAC4 QXAC3 QXAC2 QXAC1 FLOUT FROUT COUT RLOUT RROUT VDD P/S BYP
QS7777PF
18 17 16 15 14 13
SPREAD(SDA)
PSAVE(STRB)
MUTE(SCL)
VREFOUT
VREFIN
MSC3
MSC2
MSC1
GND
AC
27
AR
26
QS7777CF
Top view
QXDC1 QXCC4 QXCC3 QXCC2 QXCC1 QXBC5 QXBC4 QXBC3 QXBC2 VCC QXAC5
25 24 23 22 21 20 19
36
35
34
33
32
31
30
29
s s s s
DVD and laser disk players TV and AV equipment Multimedia products (including sound cards) Car audio
QXDC2 QXDC3 QXDC4 FLIN FRIN CIN SUBIN RLIN
28
APPLICATIONS
37 38 39 40 41 42 43 44 45 46 47 48
QXBC1
MO QXAC4 QXAC3 QXAC2 QXAC1 FLOUT FROUT COUT RLOUT RROUT VDD P/S BYP
18 17 16 15 14 13
ORDERING INFORMATION
D e vice QS7777PF QS7777CF P ackag e 48-pin QFP 48-pin QFP
QS7777CF
10 11 12 1 2 3 4 5 6 7 8 9
RRIN MSC4 MSC5 MSC6
SPREAD(SDA)
MUTE(SCL)
VREFOUT
VREFIN
PSAVE
MSC3
MSC2
MSC1
GND
AC
AR
I2 C bus is a registered tra d e m a r k of Philips Electronics N.V. Dolby and the double-D symbol are registered tra d e m a r ks of Dolby Laboratories Licensing Corporation. NIPPON PRECISION CIRCUITS--1
MO
QS7777PF/CF
PACKAGE DIMENSIONS
Unit: mm
0.35max
0.17 0.05
0.339typ
1.00typ
9.00 0.20
7.00 0.20
0 to 10
9.00 0.20
0.50
0.10 0.19 0.05 0.08 M
BLOCK DIAGRAM
VREFOUT VREFIN
GND
0.10 0.07
7.00 0.20
0.20 1.50 0.10
0.50 0.10
Digital Circuitry
M
FLIN
Analog Circuitry
VREF FLOUT FROUT RLOUT Matrix Switch RROUT COUT
Qsound 3D Process FRIN
VDD
VCC
RLIN MONO to STEREO Qsound 3D Process
RROUT CIN SUBIN Controls P/S Parallel/Serial Switch Decoder/Data Latches
,,,,,,,,,,,,,,,,, ,,,,,, ,,,,,,,,,,,,,,,,, ,,,,,, ,,,,,,,,,,,,,,,,, ,,,,,, DATA
CLK AC SPREAD (SDA) MUTE (SCL) PSAVE (STRB) BYP MO AR
Shift Register
M
NIPPON PRECISION CIRCUITS--2
QS7777PF/CF
PIN DESCRIPTION
Number 1 2 3 4 5 6 7 P S AV E - MUTE 8 - SPREAD 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 - AC AR MO BYP P/S VDD RROUT RLOUT COUT FROUT FLOUT QXAC1 QXAC2 QXAC3 QXAC4 QXAC5 QXBC1 QXBC2 QXBC3 QXBC4 QXBC5 VCC QXCC1 QXCC2 QXCC3 QXCC4 QXDC1 QXDC2 QXDC3 QXDC4 FLIN FRIN CIN SUBIN RLIN RRIN MSC4 MSC5 MSC6 Name P arallel VREFOUT VREFIN MSC3 MSC2 MSC1 GND - STRB - SCL - SDA Serial I/O O I I I I - I I I I I I/O I I I I I - O O O O O I I I I I I I I I I - I I I I I I I I I I I I I I I I I V C C /2 reference voltage output V C C /2 reference voltage input (biased internally to V C C /2) Mono/stereo conversion filter capacitor 3 Mono/stereo conversion filter capacitor 2 Mono/stereo conversion filter capacitor 1 Ground Pow er save control (HIGH: pow er save on, LOW : pow er save off) Serial data strobe (not used on I 2 C bus device QS7777CF) Mute signal control (HIGH: mute on, LOW : mute off) Serial data shift clock input (QS7777CF: CMOS input, no protection diode connected between this pin and V D D ) Enhancement control (HIGH: maximum spread, LOW : minimum spread) Serial data input (and ACK signal output for I2 C bus device QS7777CF: n-channel open-drain pin, no protection diode connected between this pin and VDD). Center speaker control (HIGH: actual center, LOW : virtual center) Rear speaker control (HIGH: actual rear, LOW : virtual rear) Mono-to-stereo convert select (HIGH: ON, LOW : OFF) Bypass/QSurround select control (HIGH: bypass, LOW : QSurround) Interface method select (HIGH: parallel input, LOW : serial input) 4.5 to 5.5V DC digital supply Rear right-channel signal output Rear left-channel signal output Center signal output Front right-channel signal output Front left-channel signal output QExpander filter A capacitor 1 QExpander filter A capacitor 2 QExpander filter A capacitor 3 QExpander filter A capacitor 4 QExpander filter B capacitor 5 QExpander filter B capacitor 1 QExpander filter B capacitor 2 QExpander filter B capacitor 3 QExpander filter B capacitor 4 QExpander filter B capacitor 5 5 to 13V DC analog supply QExpander filter C capacitor 1 QExpander filter C capacitor 2 QExpander filter C capacitor 3 QExpander filter C capacitor 4 QExpander filter D capacitor 1 QExpander filter D capacitor 2 QExpander filter D capacitor 3 QExpander filter D capacitor 4 Front left-channel signal input Front right-channel signal input Center-channel signal input S u b - woofer signal input Rear left-channel signal input Rear right-channel signal input Mono/stereo conversion filter capacitor 4 Mono/stereo conversion filter capacitor 5 Mono/stereo conversion filter capacitor 6 Description
NIPPON PRECISION CIRCUITS--3
QS7777PF/CF
SPECIFICATIONS
Absolute Maximum Ratings
P arameter Supply voltage range (analog) Supply voltage range (digital) Input voltage range (analog) Input voltage range (digital) I2 C signal input voltage (SDA, SCL) Pow er dissipation Storage temperature range Soldering temperature Soldering time Symbol VCC VDD V IANA V IDIG V IOPEN PD T stg T sld tsld Rating -0.3 to 15 -0.3 to 7 -0.3 to V C C + 0.3 -0.3 to V D D + 0.3 10 250 -40 to 125 255 10 Unit V V V V V mW C C s
Recommended Operating Conditions
P arameter Supply voltage range (analog) Supply voltage range (digital) Operating temperature range Symbol VCC VDD T opr Rating 5 to 13 4.5 to 5.5 -20 to 70 Unit V V C
DC Characteristics
VCC = 9V, VDD = 5V, Ta = 25C
Rating P arameter Analog input impedance Reference voltage output HIGH-level input voltage L O W -level input voltage Input leakage current Input leakage current (I 2 C input) Symbol Z AIN VREFOUT V IH V IL IL E A K IL O P E N VOL VCC VDD IC C ID D IC C S AV E Quiescent input signal S D A, SCL, 10V input voltage A CK signal output on SDA, 3mA sink current Condition min FLIN, FRIN, RLIN, RRIN, CIN, COUT 16 - 0.7V D D - -3 -3 0 5 4.5 - - - typ 20 V C C /2 - - - - - - - 10 0.3 0.1 max 24 - - 0.3V D D 3 3 0.4 13 5.5 13 0.5 0.2 k V V V A A V V V mA mA mA Unit
L O W -level output voltage Supply voltage (analog) Supply voltage (digital) Current consumption (analog) Current consumption (digital) Standby current (analog)
NIPPON PRECISION CIRCUITS--4
QS7777PF/CF
Noise and THD Characteristics
VCC = 9V, VDD = 5V, Ta = 25C
P arameter Symbol Condition BYP = AR = AC = HIGH, MO = SPREAD = L O W , "A"-wgt, FLOUT, R L O U T, FRO U T, R R O U T, C O U T B Y P = M O = S P R E A D = L OW , AR = AC = HIGH, "A"-wgt, FLOUT, FRO U T B Y P = M O = S P R E A D = L OW , AR = AC = HIGH, "A"-wgt, RLOUT, RRO U T MO = HIGH, all other excluding MO = L O W , all inputs 1V R M S , f = 1kHz, FRO U T, FLOUT MO = AR = AC = HIGH, BYP = SPREAD = AE = LOW , all inputs 1V R M S , f = 1kHz, R R O U T, R L O U T, C O U T Rating min - typ 11 max 22 Unit
Bypass noise voltage
N BYP N QSF NQSR THDF
VRMS VRMS VRMS %
QSurround noise voltage (front) QSurround noise voltage (rear) QSurround mono total harmonic distortion (front) QSurround mono total harmonic distortion (rear)
- -
16 14
32 28
-
-
0.1
THDR
-
-
0.1
%
AC Characteristics
VCC = 9V, VDD = 5V, Ta = 25C
P arameter Front maximum input voltage 1 Front maximum input voltage 2 Rear maximum input voltage 1 Symbol V FIN1 V FIN2 V RIN1 V RIN2 V CIN V SUBIN G FFBYP G RRBYP G RFBYP G CC G CF G SUBF G FF G FXF G RR G RXR Condition FLIN = FRIN, RLIN = RRIN = CIN = SUBIN = 0V, BYP = LOW , f = 1kHz FLIN = -FRIN, RLIN = RRIN = CIN = SUBIN = 0V, BYP = LOW , f = 1kHz RLIN = RRIN, FLIN = FRIN = CIN = SUBIN = 0V, BYP = LOW , AR = LOW , f = 1kHz RLIN = -RRIN, FLIN = FRIN = CIN = SUBIN = 0V, BYP = LOW , AR = LOW , f = 1kHz FLIN = FRIN = RLIN = RRIN = SUBIN = 0 V, BYP = LOW , AC = LOW , f = 1kHz FLIN = FRIN = RLIN = RRIN = CIN = 0V, f = 1kHz BYP = HIGH, f = 1kHz, FLIN to FLOUT, FRIN to FRO U T BYP = HIGH, AR = HIGH, f = 1kHz, RLIN to RLOUT, RRIN to RRO U T BYP = HIGH, AR = LOW , f = 1kHz, RLIN to FLOUT, RRIN to FRO U T A C = HIGH, f = 1kHz, CIN to COUT A C = LOW , f = 1kHz, CIN to FLOUT, CIN to FRO U T f = 1kHz, SUBIN to FLOUT, SUBIN to FROUT SPREAD = HIGH, BYP = LOW , f = 1kHz, FLIN to FLOUT, FRIN to FRO U T SPREAD = HIGH, BYP = LOW , f = 1kHz, FLIN to FRO U T, FRIN to FLOUT B Y P = L OW , AR = HIGH, f = 1kHz, RLIN to RLOUT, RRIN to RRO U T B Y P = L OW , AR = HIGH, f = 1kHz, RLIN to RRO U T, RRIN to RLOUT Rating min 1.4 0.5 1.4 typ - - - max - - - Unit VRMS VRMS VRMS VRMS VRMS VRMS dB dB dB dB dB dB dB dB dB dB
Rear maximum input voltage 2
0.3
-
-
Center maximum input voltage S u b - woofer maximum input voltage FIN to FOUT bypass gain RIN to RO U T bypass gain RIN to FOUT bypass gain CIN to COUT gain CIN to FOUT gain SUBIN to FOUT gain FIN to FOUT gain FIN to FOUT crosstalk gain RIN to ROUT gain RIN to ROUT crosstalk gain
1.7 2.2 -2 -2 -2 -2 -2.8 -8 5.7 3.7 2.7 -1.2
- - 0 0 0 0 -0.8 -6 7.5 5.7 4.7 0.8
- - 2 2 2 2 1.2 -4 9.5 7.7 6.7 2.8
NIPPON PRECISION CIRCUITS--5
QS7777PF/CF
Rating min 8 typ 10 max 12
P arameter
Symbol
Condition SPREAD = HIGH, BYP = LOW , AR = L O W , f = 1kHz, RLIN to FLOUT, RRIN to FROUT SPREAD = HIGH, BYP = LOW , AR = L O W , f = 1kHz, RLIN to FRO U T, RRIN to FLOUT QS7777PF QS7777PF QS7777PF QS7777PF QS7777PF QS7777PF QS7777PF QS7777PF QS7777CF (I 2 C) QS7777CF (I 2 C) QS7777CF (I 2 C) QS7777CF (I 2 C) QS7777CF (I 2 C) QS7777CF (I 2 C) QS7777CF (I 2 C) QS7777CF (I 2 C)
Unit
RIN to FOUT gain
G RF
dB
RIN to FOUT crosstalk gain SCL clock pulse period SCL clock HIGH-level pulsewidth SCL clock LOW -level pulsewidth S D A setup time S D A hold time STRB setup time STRB clock pulsewidth STRB hold time SCL hold time SCL setup time S D A hold time S D A setup time SCL clock HIGH-level pulsewidth SCL clock LOW -level pulsewidth SCL rise time SCL fall time
G RXF t0 t1 t2 t3 t4 t5 t6 t7 tH D ; S TA tS U ; S TO tH D ; DAT tS U ; DAT tH I G H tL O W tr tf
8.5 100 40 40 15 30 50 100 50 4.0 4.0 5.0 250 4.0 4.7 - -
10.5 - - - - - - - - - - - - - - - -
12.5 - - - - - - - - - - - - - - 1000 300
dB ns ns ns ns ns ns ns ns s s s ns s s ns ns
Serial Interface Timing
3-wire (QS7777PF) timing
SDA
X
BYP
MO
AR
AC
SPRD
AREA
PSAVE
MUTE
SCL
t3
STRB
t4 t1 t0
t5 t2 t6
t7
I2C 2-wire (QS7777CF) timing
SDA
AD6
AD0
BYP
MO
AR
AC
SPRD
AREA
PSAVE
MUTE
tHD;STA
SCL
tSU;DAT tHD;DAT
tr tf
tSU;STO
tHIGH tLOW
AD6:0 represents the QS7777CF I 2 C slave address 0011110.
NIPPON PRECISION CIRCUITS--6
QS7777PF/CF
FUNCTIONAL DESCRIPTION
Operating Modes (BYP, MO, AR, AC)
The control pins BYP, MO, AR, and AC select the operating mode bypass/QSurround signal processing of the FLIN, FRIN, RLIN, RRIN, CIN, and SUBIN input signals and determine the outputs on FLOUT, FROUT, RLOUT, RROUT, and COUT. The relationship between the inputs and outputs as selected by the control pins is shown in the following table.
Control pins BYP 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 MO 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 AR 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 AC 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 Qx(FLIN) Qx(FLIN) Qx(FLIN) Qx(FLIN) Qx(FLIN) Qx(FLIN) Qx(FLIN) Qx(FLIN) FLIN FLIN FLIN FLIN Q1(M(F)) Q1(M(F)) Qx(FLIN) FLIN +RLIN +RLIN +CIN +CIN +Q1(M(R)) +Q1(M(R)) +CIN +CIN FLOUT +Q1(RLIN) +Q1(RLIN) +CIN +CIN Qx(FRIN) Qx(FRIN) Qx(FRIN) Qx(FRIN) Qx(FRIN) Qx(FRIN) Qx(FRIN) Qx(FRIN) FRIN FRIN FRIN FRIN Q1(M(F)) Q1(M(F)) Qx(FRIN) FRIN q(M(F)) q(FLIN) FLIN q(M(F)) q(FRIN) FRIN +RRIN +RRIN +CIN RLIN RLIN RRIN RRIN CIN +CIN CIN +Q1(M(R)) +Q1(M(R)) +CIN q(M(R)) q(M(R)) q(M(R)) q(M(R)) CIN +CIN CIN Output signals 1 FROUT +Q1(RRIN) +Q1(RRIN) +CIN q(RLIN) q(RLIN) q(RRIN) q(RRIN) CIN +CIN CIN RLOUT RROUT COUT
1. Qx( ), Q1( ), and q( ) = QSurround processed signals. For example, Qx(FLIN) indicates a QSurround-processed signal derived from FLIN input. R = RLIN + RRIN signal, and F = FLIN + FRIN signal. M( ) = monaural to stereo converted signal. For example, M(R) indicates monaural to stereo conversion of the RLIN+RRIN signal. The SUBIN signal is normally output on both FLOUT and FRO U T.
NIPPON PRECISION CIRCUITS--7
QS7777PF/CF
Controls (SPREAD, AREA)
The SPREAD input and AREA flag are used to control the FLOUT and FROUT signals in QSurround mode. In QSurround mode, the total sound heard is an enhanced version (virtual sound source) of the actual sound sources (speaker). When SPREAD is HIGH, the virtual sound source is widened, strengthening the surround enhancement effect. The AREA flag is used to widen the surround sound effect sweet-spot. This can be used for a larger listening audience. Note that AREA is set by serial input data only, and is therefore not available in parallel interface mode. The SPREAD and AREA control functions are shown in the following figure.
Enhanced FLIN Sound Source with SPREAD = L
Front Left Speaker
Front Right Speaker
Enhanced FRIN Sound Source with SPREAD = L
Enhanced FLIN Sound Source with SPREAD = H
Wider Listening Area (AREA = H)
Narrower Listening Area (AREA = L)
Enhanced FRIN Sound Source with SPREAD = H
Virtualized RLIN Sound Source with SPREAD = L
Virtualized RRIN Sound Source with SPREAD = L
Virtualized RLIN Sound Source with SPREAD = H
Virtualized RRIN Sound Source with SPREAD = H
NIPPON PRECISION CIRCUITS--8
QS7777PF/CF
TYPICAL APPLICATION CIRCUITS
QS7777PF Parallel Interface
10 0.022 VCC 0.022
4700p
4700p
QXDC1
0.47
0.47
0.47
0.022
0.022
QXAC5
36
QXDC2 0.022 0.022 FLIN FRIN CIN SUBIN RLIN RRIN 4.7 4.7 4.7 4.7 4.7 4.7 1000p 0.012 0.082
35
QXCC4
33 QXCC2 34 QXCC3
32 QXCC1
31 VCC
30 QXBC5
29 QXBC4
28 QXBC3
27 QXBC2
26
QXBC1
25
37 38
24 23
QXAC4 0.022F 0.022F 0.47F 4.7F 4.7F 4.7F 4.7F 4.7F 0.1 FLOUT FROUT COUT RLOUT RROUT VDD
QXDC3
QXAC3
39 QXDC4 40 FLIN 41 FRIN 42 CIN 43 SUBIN 44 RLIN 45 RRIN 46 MSC4
MSC3 3 VREFIN SPREAD(SDA) 9 PSAVE(STRB) 7 MUTE(SCL) 8
QXAC2 22 QXAC1 21 FLOUT 20 FROUT 19 COUT 18 RLOUT 17 RROUT 16 VDD 15 P/S 14
47 MSC5 48
MSC6
VREFOUT
MSC2 4
MSC1 5
GND 6
13 BYP
MO 12
AC 10
AR 11
1
2
VDD
10
10
0.022
0.22
2700p
QS7777PF Serial Interface
10 0.022 VCC 0.022
STROBE CLOCK SERIAL DATA
10k
SUBIN RLIN RRIN
10k
FLIN FRIN CIN
10k
10k
0.022 0.022 4.7 4.7 4.7 4.7 4.7 4.7 1000p 0.012 0.082
10k
10k
QXDC1
QXDC2
MSC6
10k 4700p 4700p 0.47 0.47 0.47 0.022 0.022 QXAC5
36 37 38 42 CIN 48
VREFOUT
QXDC3
39 QXDC4 40 FLIN 41 FRIN 43 SUBIN 44 RLIN 45 RRIN 46 MSC4
MSC3 3 VREFIN 10 SPREAD(SDA) 9 PSAVE(STRB) 7 MUTE(SCL) 8
47 MSC5
35
QXCC4
33 QXCC2 34 QXCC3
MSC2 4 0.022
32 QXCC1
MSC1 5
31 VCC
GND 6
30 QXBC5
29 QXBC4
28 QXBC3
27 QXBC2
AC 10
RROUT 16 VDD 15 P/S 14 MO 12
26
QXBC1
QXAC3
QXAC2 22 QXAC1 21 FLOUT 20 FROUT 19 COUT 18 RLOUT 17
25
24 23
QXAC4 0.022F 0.022F 0.47F 4.7F 4.7F 4.7F 4.7F 4.7F 0.1 FLOUT FROUT COUT RLOUT RROUT VDD
13
BYP
AR 11
1
2
10
0.22
2700p
NIPPON PRECISION CIRCUITS--9
QS7777PF/CF
QS7777CF Parallel Interface
10 0.022 VCC 0.022
4700p
4700p
QXDC1
0.47
0.47
0.47
0.022
0.022
QXAC5
36
QXDC2 0.022 0.022 FLIN FRIN CIN SUBIN RLIN RRIN 4.7 4.7 4.7 4.7 4.7 4.7 1000p 0.012 0.082
35
QXCC4
33 QXCC2 34 QXCC3
32 QXCC1
31 VCC
30 QXBC5
29 QXBC4
28 QXBC3
27 QXBC2
26
QXBC1
25
37 38
24 23
QXAC4 0.022F 0.022F 0.47F 4.7F 4.7F 4.7F 4.7F 4.7F 0.1 FLOUT FROUT COUT RLOUT RROUT VDD
QXDC3
QXAC3
39 QXDC4 40 FLIN 41 FRIN 42 CIN 43 SUBIN 44 RLIN 45 RRIN
MUTE(SCL) 8 SPREAD(SDA) 9
QXAC2 22 QXAC1 21 FLOUT 20 FROUT 19 COUT 18 RLOUT 17 RROUT 16 VDD 15 P/S 14
46 MSC4
MSC3 3 VREFIN
47 MSC5 48
MSC6
VREFOUT
PSAVE 7
MSC2 4
MSC1 5
GND 6
13 BYP
MO 12
AC 10
AR 11
1
2
VDD
10
10
0.022
0.22
2700p
QS7777CF Serial Interface
10 0.022 VCC 0.022
CLOCK SERIAL DATA
10k
FRIN CIN SUBIN RLIN RRIN
10k
FLIN
10k
10k
0.022 0.022 4.7 4.7 4.7 4.7 4.7 4.7 1000p 0.012 0.082
10k
10k
QXDC1
QXDC2
MSC6
10k 4700p 4700p 0.47 0.47 0.47 0.022 0.022 QXAC5
36 37 38 42 CIN 48
VREFOUT
QXDC3
39 QXDC4 40 FLIN 41 FRIN 43 SUBIN 44 RLIN 45 RRIN
MUTE(SCL) 8 SPREAD(SDA) 9
46 MSC4
MSC3 3 VREFIN 10
47 MSC5
35
QXCC4
33 QXCC2 34 QXCC3
MSC2 4 0.022
32 QXCC1
MSC1 5
31 VCC
GND 6
30 QXBC5
PSAVE 7
29 QXBC4
28 QXBC3
27 QXBC2
AC 10
RROUT 16 VDD 15 P/S 14 MO 12
26
QXBC1
QXAC3
QXAC2 22 QXAC1 21 FLOUT 20 FROUT 19 COUT 18 RLOUT 17
25
24 23
QXAC4 0.022F 0.022F 0.47F 4.7F 4.7F 4.7F 4.7F 4.7F 0.1 FLOUT FROUT COUT RLOUT RROUT VDD
13
BYP
AR 11
1
2
10
0.22
2700p
NIPPON PRECISION CIRCUITS--10
QS7777PF/CF
NIPPON PRECISION CIRCUITS INC. reserves the right to make changes to the products described in this data sheet in order to improve the design or performance and to supply the best possible products. Nippon Precision Circuits Inc. assumes no responsibility fo r the use of any circuits shown in this data sheet, conveys no license under any patent or other rights, and makes no claim that the circuits are free from patent infringement. Applications for any devices shown in this data sheet are for illustration only and Nippon Precision Circuits Inc. makes no claim or warranty that such applications will be suitable for the use specified without further testing or modification. The products described in this data sheet are not intended to use for the apparatus which influence human lives due to the failure or malfunction of the products. Customers are requested to comply with applicable laws and regulations in effect now and hereinafter, including compliance with expor t controls on the distribution or dissemination of the products. Customers shall not expor t, directly or indirectly, any products without first obtaining required licenses and approvals from appropriate government agencies. NIPPON PRECISION CIRCUITS INC. 4-3, Fukuzumi 2-chome Koto-ku, Tokyo 135-8430, Japan Telephone: 03-3642-6661 Facsimile: 03-3642-6698
NC9821AE 1999.11
NIPPON PRECISION CIRCUITS INC.
NIPPON PRECISION CIRCUITS--11

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