Philips TDA8440 Manuale utente

DATA SHEET

Product speciﬁcation

File under Integrated Circuits, IC02 November 1985

INTEGRATED CIRCUITS

TDA8440

Switch for CTV receivers

November 1985 2

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

November 1985 3

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.

November 1985 4

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

November 1985 5

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

November 1985 6

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

November 1985 7

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

10-4(rms) −−2V

5-4(rms) −−2V

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

November 1985 8

Philips Semiconductors Product speciﬁcation

Switch for CTV receivers TDA8440

Voltage gain V9-12 −10+1dB

10-12 −10+1dB

5-14 −10+1dB

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

November 1985 9

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,

4. Supply voltage ripple rejection = 20

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

November 1985 10

Philips Semiconductors Product speciﬁcation

Switch for CTV receivers TDA8440

Fig.2 Timing diagram I2C bus.

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