CXA1279BS TV Sound Processor Description The CXA1279BS is a bipolar IC for TV sound control with functions such as tone control, volume and balance. 22 pin SDIP (Plastic) Features • 2 type of inputs • Bass, Treble, Balance and Volume control operative in either 0 to VCC or 0 to 5 V. Absolute Maximum Ratings (Ta=25 °C) • Supply voltage VCC 14 V • Operating temperature Topr –20 to +75 °C • Storage temperature Tstg –65 to +150 °C • Allowable power dissipation 900 mW PD Applications TV Structure Bipolar silicon monolithic IC Operating Condition Supply voltage VCC 8.5 to 12.5 V TVIN1 VCC AUXIN1 N.C CH1 CL1 VOLUME BALANCE OUT1 VRS CREF Block Diagram and Pin Configuration 22 21 20 19 18 17 16 15 14 13 12 VCA TONE CONTROL & BIAS VCA AUXIN2 INSW CH2 7 8 9 10 11 VREG GND 6 N.C 5 OUT2 4 TREBLE 3 BASS 2 REG CL2 1 TVIN2 TONE Sony reserves the right to change products and specifications without prior notice. This information does not convey any license by any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating the operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits. —1— E99336-TE CXA1279BS Pin Description Pin No. Symbol (Ta=25 °C VCC=9 V) Voltage Equivalent circuit Description VCC 12µ 36k 1 TV-IN2 1 4.5 V TV mode input pin. VCC/2 12k VCC 12µ 36k 3 AUX-IN2 3 4.5 V AUX mode input pin. VCC/2 12k VCC 60µ 4 INSW 60µ — Mode select pin. 2k 4 60µ VCC 180µ 2.7k 5 CH2 4.5 V 180µ 2.7k 7k 5 External pin of HPF capacitor. 2.8k 2.8k —2— CXA1279BS Pin No. Symbol Voltage Equivalent circuit Description VCC 180µ 180µ 2.8k 6.3k 6 6 CL2 2.8k 4.5 V External pin of LPF capacitor. 4.5V 2.8k 2.8k VCC 50µ CREF/20k 5.2k 7 BASS 4.5 V (CREF) 5.2k BASS control pin. 25k 7 CREF 20k VCC 50µ CREF/20k 5.2k 8 TREBLE 4.5 V (CREF) 5.2k TREBLE control pin. 25k 8 CREF 20k VCC 500 9 OUT2 4.5 V Output pin. 9 500 10 N.C — — 10 —3— CXA1279BS Pin No. Symbol Voltage Equivalent circuit Description VCC 120 11 11 VREG 2.5 V REGULATOR output pin. VCC 12 CREF — Input pin of control reference voltage. 1k 12 30µ VCC 16k 16k 6k 13 VRS 4.5 V Reference voltage pin. Voltage VCC/2. 13 1k 6k 1k 15k 30µ VCC 500 14 OUT1 4.5 V 14 Output pin. 500 —4— CXA1279BS Pin No. Symbol Voltage Equivalent circuit Description VCC CREF/20k 15 BALANCE 4.5 V (CREF) 5.2k 25k 5.2k BALANCE control pin. 15 20k CREF VCC 140µ 47k 16 VOLUME — 16 VOLUME control pin. 8k 10k VCC 180µ 180µ 2.8k 6.3k 17 17 CL1 2.8k 4.5 V External pin of LPF capacitor. 4.5V 2.8k 2.8k VCC 180µ 180µ 18 CH1 4.5 V 18 External pin of HPF capacitor. 2.8k 19 N.C — 2.7k 7k 2.7k 2.8k — 19 —5— CXA1279BS Pin No. Symbol Voltage Equivalent circuit Description VCC 12µ 36k 20 AUX-IN1 4.5 V 20 AUX mode input pin. 12k 4.5V VCC 12µ 36k 22 TV-IN1 4.5 V 22 TV mode input pin. 12k 4.5V —6— —7— 12 11 10 9 8 7 6 5 4 3 2 1 No. VAUXF 1, 2 VTVREF 1, 2 AUX Gain 1, 2 TV REF level 1, 2 10 kHz 1, 2 TREBLE CUT 100 Hz 1, 2 BASS CUT 10 kHz 1, 2 TREBLE BOOST 100 Hz 1, 2 VCUT H VCUT L VBST H VBST L MIN BASS BOOST VVOL MIN 1, 2 1, 2 VTVFH 1, 2 GAIN VOL 10 kHz characteristics FLAT f response 100 Hz characteristics VTVFL 1, 2 1, 2 FLAT f response VTVF ICC-12 ICC-9 Symbol TV Gain consumption 2 Current consumption 1 Current Item Electrical Characteristics 0 3.0 0 0 9.0 4.5 6.0 4.5 0 9.0 4.5 6.0 4.5 4.5 6.0 4.5 BAL 4.5 0 4.5 9.0 12.0 9.0 VOL Bias conditions (V) INSW BASS TRE 9.0 12.0 9.0 VCC VRS CREF Input 1, 2 TV-IN 1, 2 1.8 Vrms 10 kHz 1.8 Vrms 100 Hz 1.8 Vrms 10 kHz 1.8 Vrms 100 Hz 1.8 Vrms 1 kHz 1.8 Vrms 10 kHz as reference. FLAT 1 kHz is taken respective channel Output of as reference. Input is taken reference. 1 kHz is taken as 1.8 Vrms Output of reference. Input is taken as Remarks respective channel 1, 2 OUT Output 100 Hz 1.8 Vrms 1, 2 AUX-IN 1 kHz signal TV-IN Input 24 18 34 25 –70 +1.5 +1.5 –11 10.5 12.5 10.5 12.0 — 0 0 –15 –12.5 –10.5 –7.5 –12.0 –10.5 –7.0 7.5 7.0 — –1.5 –1.5 –17 –3.0 –1.0 +1.0 –3.0 –1.0 +1.0 17 12 dB dB dB dB dB dB dB dB dB dB mA mA Min. Typ. Max. Unit (Ta=25 °C) CXA1279BS —8— 25 24 23 22 21 20 19 18 17 16 15 14 13 No. 3.0 3.0 DC OUTPUT VREG AA2 AUX2 → AUX1 REGULATOR CTLK Cross-Talk 0 2 AUX-IN 1 AUX-IN CTLK AA1 2 TT2 TV2 → TV1 AUX1 → AUX2 TV-IN CTLK Cross-Talk Cross-Talk 1 TV-IN CTLK 1, 2 AUX-IN TT1 AT AUX → TV 0 TV1 → TV2 CTLK Cross-Talk 4.5 Cross-Talk CTLK TA TV → AUX MAX 1 kHz 1, 2 Cross-Talk Vdist F Vdist F DISTORTION-2 1 kHz 1, 2 DISTORTION-1 1, 2 1.8 Vrms 1 kHz mVrms 420 DC Pin 11 1 OUT 2 OUT 1 OUT 2 OUT 1, 2 OUT TV-IN 1 VBAL 1 kHz 1.8 Vrms 1 CUT 2 VRS 1 kHz 2 9.0 OUT Output BALANCE CUT 9.0 4.5 1 kHz TV-IN signal 2 9.0 0 9.0 VCC Input 2 4.5 VOL Input BST 2 1 kHz 2 4.5 BAL CREF OUT VBAL BALANCE BOOST 0 INSW BASS TRE Bias conditions (V) TV-IN VBAL CUT 1 1 kHz 1 BST 1 1 kHz 1 BALANCE CUT VBAL Symbol BALANCE BOOST Item as reference. 1 kHz is taken Output of FLAT Remarks 2.2 — — — — — — — — — 0 — 0 2.5 — — — — — — — — — 1.0 — 1.0 2.8 –70 –70 –70 –70 –70 –70 2.0 1.0 –30 2.0 –30 2.0 VDC dB dB dB dB dB dB % % dB dB dB dB Min. Typ. Max. Unit CXA1279BS VOFFset 1 VOFFset 2 VOFFset 3 VOFFset 4 DC OFFset 2 DC OFFset 3 DC OFFset 4 28 29 30 NL Symbol DC OFFset 1 1, 2 NOISE LEVEL Item 27 26 No. 0 4.5 9.0 ↓ 4.5 0 ↓ 4.5 4.5 9.0 ↓ 4.5 0 ↓ 4.5 4.5 INSW BASS TRE 4.5 BAL 9.0 VOL Bias conditions (V) 9.0 VCC VRS CREF Input signal Input 1, 2 OUT Output 30 kHz LPF used. Remarks –1.0 –1.0 –1.0 –1.0 — 0 0 0 0 — 1.0 1.0 1.0 1.0 VDC VDC VDC VDC –60 dBm Min. Typ. Max. Unit CXA1279BS —9— R1 10k C3 10µ C5 0.01µ C7 0.33µ C9 10µ 11 10 9 8 7 6 C1 10µ 12 R5 10k OUT2 R6 10k OUT1 DC 2.5V C12 1µ CONTROL & BIAS REG 13 5 VCA VCA 14 4 15 3 16 C11 47µ 2 TONE TONE 17 C10 10µ 1 18 C8 0.33µ TVIN2 TVIN1 GND AUX-IN2 TV-IN2 R3 10k AUXIN1 AUXIN2 AC N.C 19 CH1 INSW 20 C6 0.01µ CL1 CH2 21 C4 10µ VOLUME CL2 22 C2 10µ BALANCE BASS R4 10k OUT1 TREBLE R2 10k VRS OUT2 TV-IN1 CREF N.C —10— VREG VCC AUX-IN1 Electrical Characteristics Circuit DIST ACV 0-VCC CONTROL 0-5V CONTROL ACV DIST CXA1279BS C5 0.01µ C7 0.33µ C9 10µ 11 10 9 8 7 C3 10µ 12 OUT1 OUT2 DC 2.5V C12 1µ CONTROL & BIAS REG 13 6 VCA VCA 14 5 15 C11 47µ 4 16 C10 10µ 3 TONE TONE 17 C8 0.33µ 2 TVIN1 TVIN2 VCC GND 0-VCC CONTROL 0-5V CONTROL Application circuits shown are typical examples illustrating the operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits or for any infringement of third party patent and other right due to same. AUX-IN2 TV-IN2 AUXIN1 1 C1 10µ N.C AUXIN2 18 CH1 INSW 19 CL1 CH2 20 C6 0.01µ VOLUME CL2 21 C4 10µ BALANCE BASS 22 C2 10µ OUT1 TREBLE TV-IN1 VRS OUT2 AUX-IN1 CREF N.C —11— VREG Application Circuit CXA1279BS CXA1279BS Description of Operation Signals input to TV-IN and AUX-IN are switched through INSW (Input Switch) and input to Tone Control circuit. In the Tone Control circuit, Tone Control for Bass and Treble is executed at the cut off frequency determined by the respective external capacitor. Tone controlled signals are Balance and Volume controlled at the VCA circuit and output through the output buffer. The control of Bass, Treble, Balance and Volume respectively is performed with CREF pin voltage as reference. Accordingly when control is used from 0 to VCC, VCC/2 is applied to CREF (connected to VRS pin). To control from 0 to 5 VDC, 2.5 VDC is applied to CREF for usage (connected to VREG pin or half the voltage of 5 V supply microcomputer is applied for offset.). —12— CXA1279BS TONE characteristecs 20 Gain (dB) BASS-TREBLE MAX. 10 0 –10 BASS-TREBLE MIN. –20 100 1k 10k Frequency (Hz) CH. vs. TREBLE-CONTROL (MAX) 12.0 0.1µ OUT 1, 2 (dB) 10.0 8.0 0.047µ 6.0 0.01µ 4700p 4.0 1000p 2.0 0 1k 10k Frequency (Hz) CL. vs. BASS-CONTROL (MAX) 12.0 OUT 1, 2 (dB) 10.0 8.0 1.5µ 0.33µ 0.033µ 0.15µ 6.0 3.3µ 4.0 2.0 0 100 1k Frequency (Hz) —13— CXA1279BS VOLUME CONTROL characteristics BALANCE CONTROL characteristics 0 0 –10 –10 –20 –20 –30 –30 OUT 1, 2 (dB) OUT 1, 2 (dB) OUT1 –40 –50 –40 –50 –60 –60 –70 –70 –80 –80 –90 –90 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 VOLUME (VDC) TREBLE CONTROL characteristics +12 +10 INPUT : 100Hz +8 +6 +8 +6 +4 +2 0 –2 –4 +4 +2 0 –2 –4 OUT 1, 2 (dB) OUT 1, 2 (dB) 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 BALANCE (VDC) BASS CONTROL characteristics +12 +10 OUT2 –6 –8 –6 –8 –10 –10 –12 –12 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 INPUT : 100kHz 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 BASS (VDC) TREBLE (VDC) —14— CXA1279BS Unit : mm + 0.1 0.05 0.25 – 22PIN SDIP (PLASTIC) + 0.4 19.2 – 0.1 7.62 + 0.3 6.4 – 0.1 12 22 0° to 15° 11 1 0.5 ± 0.1 + 0.15 0.9 – 0.1 + 0.4 3.9 – 0.1 0.51 MIN 1.778 + 0.15 3.25 – 0.2 Package Outline Two kinds of package surface: 1.All mat surface type. 2.All mirror surface type. PACKAGE STRUCTURE MOLDING COMPOUND EPOXY RESIN SONY CODE SDIP-22P-01 LEAD TREATMENT SOLDER PLATING EIAJ CODE SDIP022-P-0300 LEAD MATERIAL COPPER ALLOY PACKAGE MASS 0.95g JEDEC CODE —15—