QS7785CF Seiko, QS7785CF Datasheet
QS7785CF
Related parts for QS7785CF
QS7785CF Summary of contents
Page 1
... It also features a cen- ter signal output for clear listening of vocal and speech signals. 2 • QS7785CF bus 2-wire serial interface (Data and Clock) • QS7785PF: 3-wire serial interface (Data, Clock and Strobe) ...
Page 2
PACKAGE DIMENSIONS (Unit: mm) 7.00 0.20 9.00 0.20 0.10 0.50 0.19 0.05 BLOCK DIAGRAM BASC1 37 RIN 38 LIN 39 BASC2 40 MSC6 41 MSC5 42 MSC4 43 MSC3 44 MSC2 45 MSC1 31 VCC To internal ...
Page 3
... I Input mode control (HIGH: parallel, LOW: serial) I Enhancement control (HIGH: high spread, LOW: low spread) I Serial data strobe (not applicable to QS7785CF) I Mono-to-stereo convert select (HIGH: mono to stereo mode, LOW: normal mode) I Center output control (HIGH: center on, LOW: center off) I ...
Page 4
Name Number Parallel Serial 37 RIN 38 LIN 39 BASC2 40 MSC6 41 MSC5 42 MSC4 43 MSC3 44 MSC2 45 MSC1 46 QXCC1 47 QXCC2 48 QXCC3 SPECIFICATIONS Absolute Maximum Ratings GND = 0V Parameter Supply voltage range (analog) ...
Page 5
DC Characteristics 5V, GND = 0V ° Parameter Symbol Z AIN1 Analog input impedance Z AIN2 Reference voltage output V REFOUT HIGH-level input voltage V IH LOW-level input voltage ...
Page 6
AC Characteristics 5V, GND = 0V ° Parameter Symbol Bypass-mode maximum input voltage V B Qsurround enhanced-mode V Q+ maximum input voltage Qsurround-mode maximum input V QS voltage (surround ...
Page 7
... Data signal. Sets mode settings. See “Operating Modes.” SCL Clock signal. Data is read on the rising edge. STRB Strobe signal. Mode switches occur on the rising edge of this signal 2-wire (QS7785CF) timing address is {AD6 − AD0} = {1011011} SDA AD6 AD0 t ...
Page 8
FUNCTIONAL DESCRIPTION Operating Modes The QS7785PF/CF operating mode can be con- trolled over either a parallel interface (P/S = HIGH) or one of two serial interfaces (P/S = LOW). The Output mode No. Input signals BYP ...
Page 9
In output modes 9 to 11, the input stereo signal is output to the speakers without processing. The bypass function works for both stereo and mono input signals, and is used to listen to the original sig- nals. In mode ...
Page 10
Speaker Arrangement The QS7785PF/CF supports the following speaker arrangements. 37 RIN SROUT 24 38 LIN FROUT 26 CIN 21 Front Speakers COUT 22 FLOUT 25 SLOUT 23 Type A. Two front speakers in front and two surround speakers in rear ...
Page 11
Center Control The center signal output on COUT is enabled when AC is HIGH. This section describes the output function whereby fixed frequency sound sources, such as vocal and speech signals, can be output on the center signal. As mentioned ...
Page 12
Bass Boost With a signal input connected to BASC1 and BASC2, a bass boost function can be implemented. When BASS is HIGH, resistors RA and RB and + RA=10k C:0.15µF Bass boost connection (Gb = 6dB Gain G ...
Page 13
TYPICAL APPLICATIONS Parallel Interface 10k 10k 0.15µF 4.7µF RIN 37 LIN 38 10k 10k 4.7µF 39 0.15µF 40 0.22µF 41 0.022µF 42 2700pF 43 0.082µF 44 0.012µF 45 1000pF 46 8200pF 47 QXCC2 QXCC3 48 8200pF A capacitor for decoupling ...
Page 14
Serial Interface QS7785PF 10k 10k 0.15µF 4.7µF RIN 37 LIN 38 10k 10k 4.7µF 39 0.15µF 40 0.22µF 41 0.022µF 42 2700pF 43 0.082µF 44 0.012µF 45 1000pF 46 8200pF 47 QXCC2 QXCC3 48 8200pF QS7785PF 10k 10k 0.15µF 4.7µF ...
Page 15
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 ...