Philips TDA8440 User manual

DATA SHEET
Product specification
File under Integrated Circuits, IC02 November 1985
INTEGRATED CIRCUITS
TDA8440
Switch for CTV receivers

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Philips Semiconductors Product specification
Switch for CTV receivers TDA8440
GENERAL DESCRIPTION
TheTDA8440isaversatilevideo/audioswitch,intendedto
be used in CTV receivers equipped with an AUXILIARY
VIDEO/AUDIO plug.
It provides two 3-state switches for audio channels and
one 3-state switch for the video channel and a video
amplifier with selectable gain (times 1 or times 2).
The integrated circuit can be used in conjunction with a
microcontrollerfromtheMAB8400family,andiscontrolled
via a bidirectional I2C bus. Sufficient sub-addressing is
provided for the I2C bus mode. It can also be controlled
directly by d.c. switching signals.
Features
•Combinedanalogue anddigital circuitrygives maximum
flexibility in channel switching
•3-state switches for all channels
•Selectable gain for the video channels
•Sub-addressing facility
•I2C bus or non-I2C bus mode (controlled by d.c.
voltages)
•Slave receiver in the I2C bus mode
•External OFF command
•System expansion possible up to 7 devices (14 sources)
•Static short-circuit proof outputs
QUICK REFERENCE DATA
PACKAGE OUTLINE
18-lead DIL; plastic (SOT102); SOT102-1; 1996 November 19.
Supply voltage range V15-4 10 to 13,2 V
Supply current (without load) I15 typ. 33 mA
max. 50 mA
Storage temperature Tstg max. +125 °C
Operating ambient temperature range Tamb 0 to +70 °C

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Philips Semiconductors Product specification
Switch for CTV receivers TDA8440
Fig.1 Block diagram and test circuit.
S0, S1, S2 and OFF (pins 11, 13, 6 and 2) connected to VPor GND.
If more than 1 device is used, then the outputs and the pins 8 (bias decoupling of the audio inputs) may be connected in parallel.

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Philips Semiconductors Product specification
Switch for CTV receivers TDA8440
FUNCTIONAL DESCRIPTION
The TDA8440 is a monolithic system of switches and can be used in CTV receivers equipped with an AUXILIARY
VIDEO/AUDIO plug.
The IC incorporates 3-state switches; they comprise:
a) An electronic video switch with selectable gain (times 1 or times 2) for switching between an internal video signal
(from the IF amplifier) and an AUXILIARY input signal.
b) Two electronic audio switches, for two sound channels (stereo or dual language), for switching between internal
audio sources and signals from the AUXILIARY VIDEO/AUDIO plug.
A selection can be made between two input signals and an OFF-state. The OFF-state is necessary if more than one
TDA8440 device is used.
The SDA and SCL pins can be connected to the I2C bus or to d.c. switching voltages. Inputs S0(pin 11), S1(pin 13), and
S2(pin 6) are used for selection of sub-addresses or switching to the non-I2C mode. Inputs S0, S1and S2can be
connected to the supply voltage (H) or to ground (L). In this way no peripheral components are required for selection.
Table 1 Sub-addressing
NON-I2C BUS CONTROL
If the TDA8440 switching device has to be operated via the AUXILIARY VIDEO/AUDIO plug, inputs S2, S1and S0must
be connected to the supply line (12 V).
The sources (internal and external) and the gain of the video amplifier can be selected via the SDA and SCL pins with
the switching voltage from the AUXILIARY VIDEO/AUDIO plug:
•Sources I are selected if SDA = 12 V (external source)
•Sources II are selected if SDA = 0 V (TV mode)
•Video amplifier gain is 2 ×if SCL = 12 V (external source)
•Video amplifier gain is 1 ×if SCL = 0 V (TV mode)
If more than one TDA8440 device is used in the non-I2C bus system, the OFF pin can be used to switch off the desired
devices. This can be done via the 12 V switching voltage on the AUXILIARY VIDEO/AUDIO plug.
•All switches are in the OFF position if OFF = H (12 V)
•All switches are in the selected position via SDA and SCL pins if OFF = L (0 V)
S2S1S0
SUB-ADDRESS
A2A1A0
LL L000
LL H001
LH L010
LH H011
HL L100
HL H101
HH L110
H H H non I2C addressable

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Philips Semiconductors Product specification
Switch for CTV receivers TDA8440
I2C BUS CONTROL
Detailed information on the I2C bus is available on request.
Table 2 TDA8440 I2C bus protocol.
OFF FUNCTION
With the OFF input all outputs can be switched off (mode high ohmic), depending on the value of D0.
STA A6A5A4A3A2A1A0R/W AC D7D6D5D4D3D2D1D0AC STO
STA = start condition
A6= 1 Fixed address bits
A5= 0 Fixed address bits
A4= 0 Fixed address bits
A3= 1 Fixed address bits
A2= sub-address bit, fixed via S2input
A1= sub-address bit, fixed via S1input
A0= sub-address bit, fixed via S0input
R/W = read/write bit (has to be 0, only write mode allowed)
AC = acknowledge bit (= 0) generated by the TDA8440
D7= 1 audio la is selected to audio output a
D7= 0 audio la is not selected
D6= 1 audio lla is selected to audio output a
D6= 0 audio lla is not selected
D5= 1 audio lb is selected to audio output b
D5= 0 audio lb output is not selected
D4= 1 audio llb is selected to audio output b
D4= 0 audio llb is not selected
D3= 1 video l is selected to video output
D3= 0 video l is not selected
D2= 1 video ll is selected to video output
D2= 0 video ll is not selected
D1= 1 video amplifier gain is times 2
D1= 0 video amplifier gain is times 1
D0= 1 OFF-input inactive
D0= 0 OFF-input active
STO = stop condition

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Philips Semiconductors Product specification
Switch for CTV receivers TDA8440
D0/OFF gating
Power-on reset
The circuit is provided with a power-on reset function.
When the power supply is switched on an internal pulse will be generated that will reset the internal memory S0, in the
initial state all the switches will be in the off position and the OFF input is active (D7- D0= 0) (I2C mode), position defined
via SDA and SCL inputs (non-I2C mode).
When the power supply decreases below 5 V a pulse will be generated and the internal memory will be reset. The
behaviour of the switches will be the same as described above.
RATINGS
Limiting values in accordance with the Absolute Maximum System (IEC 134)
THERMAL RESISTANCE
D0OFF INPUT OUTPUTS
0 (off input active) H OFF
0 L in accordance with last defined
D7- D1(may be entered while OFF = HIGH)
1 (off input inactive) H in accordance with D7- D1
1 L in accordance with D7- D1
MIN. TYP. MAX. UNIT
Supply voltage pin 15 VP−−14 V
Input voltage range pin 17 VSDA −0,3 −VP+0,3 V
pin 18 VSCL −0,3 −VP+0,3 V
pin 2 VOFF −0,3 −VP+0,3 V
pin 11 VS0 −0,3 −VP+0,3 V
pin 13 VS1 −0,3 −VP+0,3 V
pin 6 VS2 −0,3 −VP+0,3 V
Video output current pin 16 −I16 −−50 mA
Storage temperature range Tstg −−+125 °C
Operating ambient temperature range Tamb 0−+70 °C
Junction temperature Tj−−+150 °C
PARAMETER SYMBOL VALUE UNIT
From junction to ambient in free air Rth j−a50 K/W

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Philips Semiconductors Product specification
Switch for CTV receivers TDA8440
CHARACTERISTICS
Tamb =25°C; VP= 12 V; unless otherwise specified
PARAMETER SYMBOL MIN. TYP. MAX. UNIT
Supply
Supply voltage V15-4 10 −13,2 V
Supply current (without load) I15 −37 50 mA
Video switch
Input coupling capacitor C1C3100 −−nF
Voltage gain (times 1; SCL = L) A3-16 −10+1dB
(times 2; SCL = H) A3-16 +5+6+7dB
Voltage gain (times 1; SCL = L) A1-16 −10+1dB
(times 2; SCL = H) A1-16 +5+6+7dB
Input video signal amplitude (gain times 1) V3-4 −−4,5 V
Input video signal amplitude (gain times 1) V1-4 −−4,5 V
Output impedance Z16-4 −7−Ω
Output impedance in ‘OFF’ state Z16-4 100 −−kΩ
Isolation (off state) (fo= 5 MHz) 60 −−dB
Signal-to-noise ratio (note 3) S/S +N60−−dB
Output top-sync level V16-4 2,4 2,8 3,2 V
Differential gain G −−3%
Minimum crosstalk attenuation (note 2) V16-4 60 −−dB
Supply voltage rejection (note 4) RR 36 −−dB
Bandwidth (1 dB) B 10 −−MHz
Crosstalk attenuation for interference
caused by bus signals (source
impedance 75 Ω)α60 −−dB
Audio switch a and b
Input signal level V9-4(rms) −−2V
V
10-4(rms) −−2V
V
5-4(rms) −−2V
V
7-4(rms) −−2V
Input impedance Z9-4 50 100 −kΩ
Z10-4 50 100 −kΩ
Z5-4 50 100 −kΩ
Z7-4 50 100 −kΩ
Output impedance Z12-4 −−10 Ω
Z14-4 −−10 Ω
Output impedance (off state) Z14-4 100 −−kΩ

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Philips Semiconductors Product specification
Switch for CTV receivers TDA8440
Voltage gain V9-12 −10+1dB
V
10-12 −10+1dB
V
5-14 −10+1dB
V
7-14 −10+1dB
Isolation (off state) (f = 20 kHz) 90 −−dB
Signal-to-noise ratio (note 5) S/S +N90−−dB
Total harmonic distortion (note 7) THD −−0,1 %
Crosstalk attenuation for interferences
caused by video signals (note 6)
Weighted α80 −−dB
Unweighted α80 −−dB
Crosstalk attenuation for interferences
caused by sinusoidal sound signals
(note 6) α80 −−dB
Crosstalk attenuation for interferences
caused by the bus signal (weighted)
(source impedance = 1 kΩ)80−−dB
Supply voltage rejection RR 50 −−dB
Bandwidth (−1 dB) B 50 −−kHz
I2C bus inputs/outputs SDA (pin 17) and SCL
(pin 18)
Input voltage HIGH VIH 3−VPV
Input voltage LOW VIL −0,3 −+1,5 V
Input current HIGH(1) IIH −−10 µA
Input current LOW(1) IIL −−10 µA
Output voltage LOW at IOL = 3 mA VOL −−0,4 V
Maximum output sink current IOL −5−mA
Capacitance of SDA and SDL inputs,
pins 17 and 18 CI−−10 pF
Sub-address inputs S0(pin 11), S1(pin 13), S2(pin 6)
Input voltage HIGH VIH 3−VPV
Input voltage LOW VIL −0,3 −+0,4 V
Input current HIGH IIH −−10 µA
Input current LOW IIL −50 −0µA
OFF input (pin 2)
Input voltage HIGH VIH +3−VPV
Input voltage LOW VIL −0,3 −+0,4 V
Input current HIGH IIH −−20 µA
Input current LOW IIL −10 −2µA
PARAMETER SYMBOL MIN. TYP. MAX. UNIT

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Philips Semiconductors Product specification
Switch for CTV receivers TDA8440
Notes to the characteristics
1. Also if the supply is switched off.
2. Caused by drive on any other input at maximum level, measured in B = 5 MHz, source impedance
for the used input 75 Ω,
3.
4. Supply voltage ripple rejection = 20
5.
6. Caused by drive of any other input at maximum level, measured in B = 20 kHz, source impedance
of the used input = 1 kΩ,
7. f = 20 Hz to 20 kHz.
8. All outputs are short-circuit proof (static).
9. The inputs and output (apart from SDA, SCL and OFF) withstand tests of MIL-STD-883 C. It is advisable to
connected series resistors to these pins.
10. Timings tS, DAT and tH, DAT deviate from the I2C bus specification. After reset has been activated, transmission may
only be started after a 50 µs delay.
11. I2C bus load conditions are as follows:
4kΩpull-up resistor to +5 V; 200 pF to GND.
All values are referred to VIH = 3 V and VIL = 1,5 V.
Bus free before start(11) tBUF 4−−µs
Start condition set-up time ts(STA) 4−−µs
Start condition hold time th(STA) 4−−µs
SCL, SDA LOW period tLOW 4−−µs
SCL, HIGH period tHIGH 4−−µs
SCL, SDA rise time tr−−1µs
SCL, SDA fall time tf−−0,3 µs
Data set-up time (write) ts(DAT) 1−−µs
Data hold time (write) th(DAT) 1−−µs
Acknowledge (from TDA8440) set-up time ts(CAC) −−2µs
Acknowledge (from TDA8440) hold time th(CAC) 0−−µs
Stop condition set-up time ts(STO) 4−−µs
PARAMETER SYMBOL MIN. TYP. MAX. UNIT
crosstalk 20 Vout
VIN max
----------------------log=
S/N 20 VOvideo noise (p-p) (2 V)
VOnoise rms B = 5 MHz
----------------------------------------------------------------------
˙.log=
Vrsupply
Vron output
-------------------------------- at f = max. 100 kHz.log
S/N = 20 VOnominal (0,5 V)
VOnoiseB=20kHz
-------------------------------------------------------
˙˙ .log
crosstalk = 20 Vout
Vin max
--------------------- according to DIN 45405 (CCIR 468).log

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Philips Semiconductors Product specification
Switch for CTV receivers TDA8440
Fig.2 Timing diagram I2C bus.