INTEGRATED CIRCUITS DATA SHEET TEA6330T Sound fader control circuit for car radios Preliminary specification Supersedes data of June 1991 File under Integrated Circuits, IC01 January 1992 Philips Semiconductors Preliminary specification Sound fader control circuit for car radios TEA6330T FEATURES • Stereo/hi-fi processor for car radios performed with volume, balance, bass and treble controls • Sound fader control (front/rear) down to −30 dB in steps of 2 dB • Fast muting via bus or via setting the muting pin • Suitable for external audio equalizers, can be looped-in controlled by the I2C-bus GENERAL DESCRIPTION This bipolar IC is an I2C-bus controlled sound/volume controller for car radios, in addition with fader function and the possibility of an external equalizer. • Power-on reset on chip sets the device into general mute position • AC and DC short-circuit protected concerning neighbouring pins • I2C-bus control for all functions. QUICK REFERENCE DATA SYMBOL PARAMETER MIN. TYP. MAX. UNIT VP supply voltage 7 8.5 10 V IP supply current − 26 − mA Vi maximum AF input signal 2 − − V (RMS value) 1.1 − − V (RMS value) Vo maximum AF output signal ∆Gv volume control range, separated −66 − +20 dB fader control range, separated 0 − −30 dB bass control range −12 − +15 dB treble control range −12 − +12 dB THD total harmonic distortion − − 0.2 % S/N(W) weighted signal-to-noise ratio − 67 − dB αCR crosstalk attenuation − 90 − dB B frequency response (−1 dB) − Hz 35 to − 20000 ORDERING INFORMATION PACKAGE EXTENDED TYPE NUMBER PINS PIN POSITION MATERIAL CODE TEA6330T(1) 20 SO plastic SOT163A Note 1. Plastic small outline package; 20 leads; body width 7.5 mm; (SOT163A); SOT163-1; 1996 August 02. January 1992 2 Philips Semiconductors Preliminary specification Sound fader control circuit for car radios TEA6330T Fig.1 Block and test circuit. Fig.2 Connection of equalizer (Table 7). In application with equalizer circuit TEA6360 coupling capacitors are not necessary. Connectors for RIGHT in brackets. January 1992 Fig.3 3 T-filter for enhanced bass control (Fig.5). Connectors for LEFT in brackets. Philips Semiconductors Preliminary specification Sound fader control circuit for car radios TEA6330T PINNING SYMBOL PIN DESCRIPTION CPS 1 filtering capacitor for power supply IN-R 2 audio input signal RIGHT GND1 3 analog ground (0 V) CBR1 4 capacitor for bass control RIGHT and signal to equalizer CBR2 5 capacitor for bass control RIGHT CTR 6 capacitor for treble control RIGHT, input signal for equalizer RIGHT QRR 7 right audio output signal of rear channel QRF 8 right audio output signal of front channel MUTE 9 input to set mute externally GND2 10 digital ground (0 V) for bus control SCL 11 clock signal of I2C-bus SDA 12 data signal of I2C-bus QLF 13 left audio output signal of front channel QLR 14 left audio output signal of rear channel CTL 15 capacitor for treble control LEFT, input signal for equalizer LEFT CBL2 16 capacitor for bass control LEFT CBL1 17 capacitor for bass control LEFT and signal to equalizer VP 18 +8.5 V supply voltage IN-L 19 audio input signal LEFT Vref 20 reference voltage output (VP/2) January 1992 Fig.4 Pin configuration. 4 Philips Semiconductors Preliminary specification Sound fader control circuit for car radios TEA6330T Low level control fader is included independent of the volume controls, because the TEA6330T has four driver outputs (for front and rear). FUNCTIONAL DESCRIPTION 2 This bipolar IC is an I C-bus controlled sound/volume controller for car radios including fader function and the possibility of an external equalizer. The sound signal setting is performed by resistor chains in combination with multi-input operational amplifiers. The advantages of this principle are the combination of low noise, low distortion and a high dynamic range. The separated volume controls of the left and the right channel make the balance control possible. The value and the characteristic of the balance is controlled via the I2C-bus. An extra mute position for the front, the rear or for all channels is built in. The last function may be used for muting during preset selection. No external interface is required between the microcomputer and this circuit, for all switching and controlling functions are controllable via the two-wire I2C-bus. The separate mute-pin allows to switch the fader into mute position without using the I2C-bus. The contour function is performed by setting an extra bass control and optional treble, depending on the actual volume position. Its switching points and its range are also controllable via the I2C-bus. The on chip power-on reset sets the TEA6330T into the general mute mode. An interface is assigned behind the volume control to loop-in an equalizer (Fig.2). In this case the treble control is switched off, and the bass control can be used to set the contour. LIMITING VALUES In accordance with the Absolute Maximum System (IEC 134). Ground pins 3 and 10 connected together. SYMBOL PARAMETER MIN. MAX. UNIT VP supply voltage (pin 18) 0 10 V Ptot total power dissipation 0 700 mW Tstg storage temperature range −55 150 °C Tamb operating ambient temperature range −40 85 °C VESD electrostatic handling* for all pins − ±300 V electrostatic handling** for all pins − ±4000 V * Equivalent to discharging a 200 pF capacitor through a 0 Ω series resistor. ** Equivalent to discharging a 100 pF capacitor through a 1.5 kΩ series resistor. January 1992 5 Philips Semiconductors Preliminary specification Sound fader control circuit for car radios TEA6330T CHARACTERISTICS VP = 8.5 V; load resistors at audio outputs 10 kΩ, fi = 1 kHz (RS = 600 Ω), bass and treble in linear position, fader in off position and Tamb = 25 °C; measurements taken in Fig.1 unless otherwise specified. SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT VP supply voltage range (pin 18) 7 8.5 10 V IP supply current − 26 − mA Vref reference voltage (pin 20) 0.45 VP 0.5 VP 0.55 VP V VO DC voltage at output (pins 7, 8, 13, 14) − 0.5 VP − V 2 − − V 1.1 − − V 19 20 21 dB Measurements over all Vi maximum AF input level for THD = 2 % Gv = −66 to −6 dB at pins 2 and 19 (RMS value) and VP = 8.1 V Vo maximum AF output level for THD = 2% Gv = −4 to +20 dB at pins 7, 8, 13, 14 (RMS value) and VP = 8.1 V Gv maximum gain by volume setting B frequency response αCR crosstalk attenuation THD total harmonic distortion −1 dB roll-off frequency PN αBUS − 20000 − Hz 70 90 − dB f = 250 to 10000 Hz Gv = 0 dB RR 35 to f = 20 to 12500 Hz Vi (RMS) = 50 mV Gv = +20 dB − 0.1 0.3 % Vi (RMS) = 500 mV Gv = 0 dB − 0.05 0.2 % Vi (RMS) = 1.6 V Gv = −10 dB − 0.2 0.5 % f = 100 Hz − 70 − dB f = 40 Hz to 3 kHz − 60 − dB f = 3 to 12.5 kHz − 50 − dB − − 10 nW − 110 − dB ripple rejection for VR < 200 mV RMS noise power at output of a 25 W powerstage with 26 dB gain (only contribution of TEA6330T) Gv = 0 dB mute position (V9 = 0) crosstalk attenuation between SDA, SCL and signal output Gv = 0 dB (20 log VBUS (p-p)/Vo RMS) S/N(W) weighted signal-to-noise ratio for January 1992 CCIR 468-2 quasi peak for 6 W power amplifier Vi = 50 mV RMS Po = 50 mW − 65 − dB Vi = 500 mV RMS Po = 50 mW − 67 − dB Vi = 50 mV RMS Po = 1 W 65 72 − dB Vi = 500 mV RMS Po = 1 W 71 78 − dB Vi = 50 mV RMS Po = 6 W; Fig.9 − 72 − dB Vi = 500 mV RMS Po = 6 W; Fig.9 − 86 − dB 6 Philips Semiconductors Preliminary specification Sound fader control circuit for car radios SYMBOL PARAMETER TEA6330T CONDITIONS MIN. TYP. MAX. UNIT Audio frequency outputs QLF, QRF, QLR and QRR Vo maximum output signal (RMS value) 1.1 − − V Ro output resistance (pins 7, 8, 13 and 14) − 100 150 Ω RL admissible output load resistor 7.5 − − kΩ CL admissible output load capacitor − − 2.5 nF VN(W) weighted noise voltage at output to ground or VCC CCIR 468-2 ; Fig.8 quasi peak for maximum gain Gv = +20 dB − 110 220 µV for 0 dB gain Gv = 0 dB − 25 50 µV for minimum gain Gv = −66 dB − 19 38 µV for mute position (V9 = 0) − 11 22 µV 35 50 65 kΩ −66 − +20 dB Volume control Rl input resistance (pins 2 and 19) Gv volume control range ∆Gv step width gain set error αmute RG = 600Ω Table 2 − 2 - dB Gv = −50 to +20 dB − − 2 dB Gv = −66 to −50 dB − − 3 dB gain tracking error balance in mid position − − 2 dB mute attenuation at volume mute set mute-bits 76 90 − dB Bass control Gv ∆Gv controllable bass range Table 3; Fig.6 maximum boost f = 40 Hz 14 15 16 dB maximum boost f = 100 Hz 12 13 14 dB maximum attenuation f = 40 Hz 11 12 13 dB maximum attenuation f = 100 Hz 10 11 12 dB f = 40 Hz 2.5 3 3.5 dB 9 10 11 dB step width Treble control Gv ∆Gv controllable treble range maximum boost f = 10 kHz maximum boost f = 15 kHz 11 12 13 dB maximum boost f > 15 kHz − − 15 dB maximum attenuation f = 10 kHz 9 10 11 dB maximum attenuation f = 15 kHz 11 12 13 dB f = 15 kHz 2.5 3 3.5 dB step width January 1992 Table 4; Fig.7 7 Philips Semiconductors Preliminary specification Sound fader control circuit for car radios SYMBOL PARAMETER TEA6330T CONDITIONS MIN. TYP. MAX. UNIT Fader control Gv fader control range Table 5 −30 − dB 1.5 2 2.5 dB GMB-bit = 1; Table 6 74 84 − dB step width αMUTE mute attenuation ∆Vo DC offset output voltage (pins 7, 8, 13, 14) 0 to − between any adjoining volume step Gv = −66 to 0 dB − 0.2 10 mV Gv = 0 to +20 dB − 2 15 mV in any treble and fader position Gv = −66 to 0 dB − − 10 mV in any bass position Gv = −66 to 0 dB − − 10 mV 0 − 1.5 V and any step to mute External mute (pin 9) V9 input voltage for MUTE-ON (LOW) fader is switched into general mute position input voltage for MUTE-OFF (HIGH) Tables 2 and 5 3 − VP V input voltage for MUTE-OFF pin 9 open-circuit − 5 − V − − ±10 µA input voltage HIGH-level 3 − VP V input voltage LOW-level 0 − 1.5 V I11, 12 input current − − ±10 µA VACK output voltage at acknowledge (pin 12) − − 0.4 V I9 input current I2C-bus, SCL and SDA (pins 11 and 12) V11, 12 I12 = −3 mA Power-on reset, when reset is active the GMU-bit (general mute) is set and the bus receiver is in reset position VP supply voltage for start of reset increasing voltage − − 2.5 V supply voltage for end of reset increasing voltage 5.2 6.0 6.8 V supply voltage for start of reset decreasing voltage 4.2 5.0 5.8 V January 1992 8 Philips Semiconductors Preliminary specification Sound fader control circuit for car radios TEA6330T Fig.5 Bass control with enhanced control range (T-filter coupling, Fig.1). Fig.6 Bass control with normal control range (Fig.1). January 1992 9 Philips Semiconductors Preliminary specification Sound fader control circuit for car radios TEA6330T Fig.7 Treble control. Fig.8 Noise voltage on outputs (CCIR 468-2 weighted, quasi-peak). January 1992 10 Philips Semiconductors Preliminary specification Sound fader control circuit for car radios Fig.9 TEA6330T Signal-to-noise ratio (CClR 468-2 weighted, quasi-peak) for TEA6330T with a 6 W power amplifier (20 dB gain, Fig.10). Measurements without noise contribution of the power amplifier. Fig.10 Signal-to-noise ratio measurement (Fig.9) with Vi = 50 mV RMS, Vo = 500 mV RMS for Pmax = 6 W. January 1992 11 Philips Semiconductors Preliminary specification Sound fader control circuit for car radios TEA6330T I2C-BUS PROTOCOL I2C-bus format S SLAVE ADDRESS A SUBADDRESS A DATA S = start condition SLAVE ADDRESS = 1000 000X A = acknowledge, generated by the slave SUBADDRESS = subaddress byte, Table 1 DATA = data byte, Table 1 P = stop condition X = read/write control bit X = 0, order to write (the circuit is slave receiver only) P If more than 1 byte DATA are transmitted, then auto-increment of the subaddress is performed. Byte organisation Table 1 I2C-bus transmission DATA BYTE FUNCTION SUBADDRESS BYTE D7 D6 D5 D4 D3 D2 D1 D0 volume left 0 0 0 0 0 0 0 0 0 0 VL5 VL4 VL3 VL2 VL1 VL0 volume right 0 0 0 0 0 0 0 1 0 0 VR5 VR4 VR3 VR2 VR1 VR0 bass 0 0 0 0 0 0 1 0 0 0 0 0 BA3 BA2 BA1 BA0 treble 0 0 0 0 0 0 1 1 0 0 0 0 TR3 TR2 TR1 TR0 fader 0 0 0 0 0 1 0 0 0 0 MFN FCH FA3 FA2 FA1 FA0 audio switch 0 0 0 0 0 1 0 1 GMU EQN 0 0 0 0 0 0 Function of the bits: VL0 to VL5 volume control of left channel (balance control) VR0 to VR5 volume control of right channel (balance control) BA0 to BA3 bass control of both channels TRO to TR3 treble control of both channels FA0 to FA3 fader control front to rear FCH select fader channels front or rear MFN mute control of the selected channels front or rear GMU mute control, general mute EQN equalizer switchover (0 = equalizer-on) January 1992 12 Philips Semiconductors Preliminary specification Sound fader control circuit for car radios TEA6330T Table 2(a) Volume setting LEFT GV GV DATA DATA DB VL5 VL4 VL3 VL2 VL1 VL0 DB VL5 VL4 VL3 VL2 VL1 VL0 +20 1 1 1 1 1 1 −32 1 0 0 1 0 1 1 0 0 1 0 0 +18 1 1 1 1 1 0 −34 +16 1 1 1 1 0 1 −36 1 0 0 0 1 1 +14 1 1 1 1 0 0 −38 1 0 0 0 1 0 +12 1 1 1 0 1 1 −40 1 0 0 0 0 1 +10 1 1 1 0 1 0 −42 1 0 0 0 0 0 +8 1 1 1 0 0 1 −44 0 1 1 1 1 1 +6 1 1 1 0 0 0 −46 0 1 1 1 1 0 +4 1 1 0 1 1 1 −48 0 1 1 1 0 1 +2 1 1 0 1 1 0 −50 0 1 1 1 0 0 −52 0 1 1 0 1 1 0 1 1 0 1 0 1 −54 0 1 1 0 1 0 −56 0 1 1 0 0 1 0 −58 0 1 1 0 0 0 0 1 0 1 1 1 −2 1 1 0 1 0 −4 1 1 0 0 1 1 −60 −6 1 1 0 0 1 0 −62 0 1 0 1 1 0 −8 1 1 0 0 0 1 −64 0 1 0 1 0 1 −66 0 1 0 1 0 0 mute left 0 1 0 0 1 1 0 1 0 0 1 0 −10 1 1 0 0 0 0 −12 1 0 1 1 1 1 −14 1 0 1 1 1 0 −16 1 0 1 1 0 1 −18 1 0 1 1 0 0 −20 1 0 1 0 1 1 mute left −22 1 0 1 0 1 0 --- --- --- −24 1 0 1 0 0 1 --- --- --- −26 1 0 1 0 0 0 --- --- --- −28 1 0 0 1 1 1 −30 1 0 0 1 1 0 mute left January 1992 13 0 0 0 0 0 0 Philips Semiconductors Preliminary specification Sound fader control circuit for car radios TEA6330T Table 2(b) Volume setting RIGHT GV GV DATA DATA DB VR5 VR4 VR3 VR2 VR1 VL0 DB VR5 VR4 VR3 VR2 VR1 VL0 +20 1 1 1 1 1 1 −32 1 0 0 1 0 1 1 0 0 1 0 0 +18 1 1 1 1 1 0 −34 +16 1 1 1 1 0 1 −36 1 0 0 0 1 1 +14 1 1 1 1 0 0 −38 1 0 0 0 1 0 +12 1 1 1 0 1 1 −40 1 0 0 0 0 1 +10 1 1 1 0 1 0 −42 1 0 0 0 0 0 +8 1 1 1 0 0 1 −44 0 1 1 1 1 1 +6 1 1 1 0 0 0 −46 0 1 1 1 1 0 +4 1 1 0 1 1 1 −48 0 1 1 1 0 1 +2 1 1 0 1 1 0 −50 0 1 1 1 0 0 −52 0 1 1 0 1 1 0 1 1 0 1 0 1 −54 0 1 1 0 1 0 −56 0 1 1 0 0 1 0 −58 0 1 1 0 0 0 0 1 0 1 1 1 −2 1 1 0 1 0 −4 1 1 0 0 1 1 −60 −6 1 1 0 0 1 0 −62 0 1 0 1 1 0 −8 1 1 0 0 0 1 −64 0 1 0 1 0 1 −66 0 1 0 1 0 0 mute right 0 1 0 0 1 1 0 1 0 0 1 0 −10 1 1 0 0 0 0 −12 1 0 1 1 1 1 −14 1 0 1 1 1 0 −16 1 0 1 1 0 1 −18 1 0 1 1 0 0 −20 1 0 1 0 1 1 mute right −22 1 0 1 0 1 0 --- --- --- −24 1 0 1 0 0 1 --- --- --- −26 1 0 1 0 0 0 --- --- --- −28 1 0 0 1 1 1 −30 1 0 0 1 1 0 mute right January 1992 14 0 0 0 0 0 0 Philips Semiconductors Preliminary specification Sound fader control circuit for car radios TEA6330T Table 3(a) Bass setting with equalizer passive (EQN =1) Table 3(b) Bass setting with equalizer active (EQN = 0) DATA GV DATA GV DB D3 D2 D1 D0 DB D3 D2 D1 D0 +15 1 1 1 1 +15 1 1 1 1 +15 1 1 1 0 +15 1 1 1 0 +15 1 1 0 1 +15 1 1 0 1 +15 1 1 0 0 +15 1 1 0 0 +12 1 0 1 1 +12 1 0 1 1 +9 1 0 1 0 +9 1 0 1 0 +6 1 0 0 1 +6 1 0 0 1 +3 1 0 0 0 +3 1 0 0 0 0 0 1 1 1 0 0 1 1 1 −3 0 1 1 0 0 0 1 1 0 −6 0 1 0 1 0 0 1 0 1 −9 0 1 0 0 0 0 1 0 0 −12 0 0 1 1 0 0 0 1 1 −12 0 0 1 0 0 0 0 1 0 −12 0 0 0 0 0 0 0 0 0 Table 4(a) Treble setting with equalizer passive (EQN = 1) Table 4(b) Treble setting with equalizer active (EQN = 0) DATA GV DATA GV DB D3 D2 D1 D0 DB D3 D2 D1 D0 +12 1 1 1 1 0 1 1 1 1 +12 1 1 1 0 0 1 1 1 0 +12 1 1 0 1 0 1 1 0 1 +12 1 1 0 0 0 1 1 0 0 +12 1 0 1 1 0 1 0 1 1 +9 1 0 1 0 0 1 0 1 0 +6 1 0 0 1 0 1 0 0 1 +3 1 0 0 0 0 1 0 0 0 0 0 1 1 1 0 0 1 1 1 −3 0 1 1 0 0 0 1 1 0 −6 0 1 0 1 0 0 1 0 1 −9 0 1 0 0 0 0 1 0 0 −12 0 0 1 1 0 0 0 1 1 −12 0 0 1 0 0 0 0 1 0 −12 0 0 0 0 0 0 0 0 0 January 1992 15 Philips Semiconductors Preliminary specification Sound fader control circuit for car radios TEA6330T Table 5(a) Fader function front SETTING Table 5(b) Fader function rear DATA SETTING FRONT REAR DB DB DATA FRONT REAR MFN FCH FA3 FA2 FA1 FA0 DB DB MFN FCH FA3 fader-off 0 0 1 1 0 0 0 1 FA2 FA1 FA0 fader-off 1 1 1 1 0 0 1 0 1 1 1 1 0 0 0 0 fader-front 1 1 1 1 1 1 1 1 fader rear −2 0 1 1 1 1 1 0 0 −2 1 0 1 1 1 0 −4 0 1 1 1 1 0 1 0 −4 1 0 1 1 0 1 −6 0 1 1 1 1 0 0 0 −6 1 0 1 1 0 0 −8 0 1 1 1 0 1 1 0 −8 1 0 1 0 1 1 −10 0 1 1 1 0 1 0 0 −10 1 0 1 0 1 0 −12 0 1 1 1 0 0 1 0 −12 1 0 1 0 0 1 −14 0 1 1 1 0 0 0 0 −14 1 0 1 0 0 0 −16 0 1 1 0 1 1 1 0 −16 1 0 0 1 1 1 −18 0 1 1 0 1 1 0 0 −18 1 0 0 1 1 0 −20 0 1 1 0 1 0 1 0 −20 1 0 0 1 0 1 −22 0 1 1 0 1 0 0 0 −22 1 0 0 1 0 0 −24 0 1 1 0 0 1 1 0 −24 1 0 0 0 1 1 −26 0 1 1 0 0 1 0 0 −26 1 0 0 0 1 0 −28 0 1 1 0 0 0 1 0 −28 1 0 0 0 0 1 −30 0 1 1 0 0 0 0 0 −30 1 0 0 0 0 0 1 0 mute front −84 0 0 1 1 1 mute rear 1 0 0 −84 0 0 1 1 --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- −84 0 0 1 0 0 0 0 0 Table 6 Mute control MUTE CONTROL DATA GMU-BIT −84 0 0 0 0 0 0 Table 7 Equalizer EQUALIZER CONTROL REMARKS DATA EQN-BIT REMARKS active 1 outputs QLF, QLR, QRF and QRR are muted active 0 signal outputs for equalizer are pins 4 and 17, inputs are pins 6 and 15; Tables 3(b) and 4(b) passive 0 no general mute passive 1 no general mute; Tables 3(a) and 4(a) January 1992 16 Philips Semiconductors Preliminary specification Sound fader control circuit for car radios TEA6330T PACKAGE OUTLINE SO20: plastic small outline package; 20 leads; body width 7.5 mm SOT163-1 D E A X c HE y v M A Z 11 20 Q A2 A (A 3) A1 pin 1 index θ Lp L 1 10 e bp detail X w M 0 5 10 mm scale DIMENSIONS (inch dimensions are derived from the original mm dimensions) UNIT A max. A1 A2 A3 bp c D (1) E (1) e HE L Lp Q v w y mm 2.65 0.30 0.10 2.45 2.25 0.25 0.49 0.36 0.32 0.23 13.0 12.6 7.6 7.4 1.27 10.65 10.00 1.4 1.1 0.4 1.1 1.0 0.25 0.25 0.1 0.9 0.4 inches 0.10 0.012 0.096 0.004 0.089 0.01 0.019 0.013 0.014 0.009 0.51 0.49 0.30 0.29 0.050 0.419 0.043 0.055 0.394 0.016 0.043 0.039 0.01 0.01 0.004 0.035 0.016 Z (1) θ 8o 0o Note 1. Plastic or metal protrusions of 0.15 mm maximum per side are not included. REFERENCES OUTLINE VERSION IEC JEDEC SOT163-1 075E04 MS-013AC January 1992 EIAJ EUROPEAN PROJECTION ISSUE DATE 95-01-24 97-05-22 17 Philips Semiconductors Preliminary specification Sound fader control circuit for car radios TEA6330T During placement and before soldering, the package must be fixed with a droplet of adhesive. The adhesive can be applied by screen printing, pin transfer or syringe dispensing. The package can be soldered after the adhesive is cured. SOLDERING Introduction There is no soldering method that is ideal for all IC packages. Wave soldering is often preferred when through-hole and surface mounted components are mixed on one printed-circuit board. However, wave soldering is not always suitable for surface mounted ICs, or for printed-circuits with high population densities. In these situations reflow soldering is often used. Maximum permissible solder temperature is 260 °C, and maximum duration of package immersion in solder is 10 seconds, if cooled to less than 150 °C within 6 seconds. Typical dwell time is 4 seconds at 250 °C. A mildly-activated flux will eliminate the need for removal of corrosive residues in most applications. This text gives a very brief insight to a complex technology. A more in-depth account of soldering ICs can be found in our “IC Package Databook” (order code 9398 652 90011). Repairing soldered joints Fix the component by first soldering two diagonallyopposite end leads. Use only a low voltage soldering iron (less than 24 V) applied to the flat part of the lead. Contact time must be limited to 10 seconds at up to 300 °C. When using a dedicated tool, all other leads can be soldered in one operation within 2 to 5 seconds between 270 and 320 °C. Reflow soldering Reflow soldering techniques are suitable for all SO packages. Reflow soldering requires solder paste (a suspension of fine solder particles, flux and binding agent) to be applied to the printed-circuit board by screen printing, stencilling or pressure-syringe dispensing before package placement. Several techniques exist for reflowing; for example, thermal conduction by heated belt. Dwell times vary between 50 and 300 seconds depending on heating method. Typical reflow temperatures range from 215 to 250 °C. Preheating is necessary to dry the paste and evaporate the binding agent. Preheating duration: 45 minutes at 45 °C. Wave soldering Wave soldering techniques can be used for all SO packages if the following conditions are observed: • A double-wave (a turbulent wave with high upward pressure followed by a smooth laminar wave) soldering technique should be used. • The longitudinal axis of the package footprint must be parallel to the solder flow. • The package footprint must incorporate solder thieves at the downstream end. January 1992 18 Philips Semiconductors Preliminary specification Sound fader control circuit for car radios TEA6330T DEFINITIONS Data sheet status Objective specification This data sheet contains target or goal specifications for product development. Preliminary specification This data sheet contains preliminary data; supplementary data may be published later. Product specification This data sheet contains final product specifications. Limiting values Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 134). Stress above one or more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation of the device at these or at any other conditions above those given in the Characteristics sections of the specification is not implied. Exposure to limiting values for extended periods may affect device reliability. Application information Where application information is given, it is advisory and does not form part of the specification. LIFE SUPPORT APPLICATIONS These products are not designed for use in life support appliances, devices, or systems where malfunction of these products can reasonably be expected to result in personal injury. Philips customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify Philips for any damages resulting from such improper use or sale. January 1992 19