Philips TDA8443A Manuale utente

DATA SHEET

Product speciﬁcation

Supersedes data of November 1992

File under Integrated Circuits, IC02

1995 Mar 07

INTEGRATED CIRCUITS

Philips Semiconductors

TDA8443A

I2C-bus controlled YUV/RGB switch

1995 Mar 07 2

Philips Semiconductors Product speciﬁcation

I2C-bus controlled YUV/RGB switch TDA8443A

FEATURES

•Two RGB/YUV selectable clamped inputs with

associated synchronization

•RGB/YUV matrix

•3-state switching with an OFF-state

•Selectable gain

•I2C-bus or non-I2C-bus mode

•Address selection for 7 devices

•Fast switching.

GENERAL DESCRIPTION

The TDA8443A is a general purpose two-channel switch

for YUV or RGB signals. One channel provides matrixing

from RGB to YUV, which can be bypassed.

The IC is controlled via I2C-bus by seven different

addresses or can be used in a non-I2C-bus mode. In the

non-I2C-bus mode, control of the circuit is achieved by DC

voltages.

QUICK REFERENCE DATA

ORDERING INFORMATION

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

VPsupply voltage (pin 18) 10.8 12.0 13.2 V

IPsupply current −65 90 mA

RGB/YUV channels

Z19-22 output impedance (pin 19) −730Ω

20-22 output impedance (pin 20) −730Ω

21-22 output impedance (pin 21) −730Ω

B bandwidth −3 dB; mode 0 or 2 −25 −MHz

+3 dB; mode 0 or 2 −12 −MHz

±3 dB; mode 1 −10 −MHz

VO(p−p) maximum output amplitude of YUV

signals (peak-to-peak value) gain ×1 2.1 −−V

gain ×2 4.2 −−V

amb operating ambient temperature 0 −+70 °C

TYPE

NUMBER PACKAGE

NAME DESCRIPTION VERSION

TDA8443A DIP24 plastic dual in-line package; 24 leads (600 mil) SOT101-1

1995 Mar 07 3

Philips Semiconductors Product speciﬁcation

I2C-bus controlled YUV/RGB switch TDA8443A

BLOCK DIAGRAM

Fig.1 Block diagram.

handbook, full pagewidth

MLD003

A4 A3 A2 A1

I C-BUS INTERFACE/

DECODER

20 21 2319 22181716151413 24

B3 B2 B1

MATRIX

RGB/YUV

CLAMP CLAMP CLAMP

CLAMP PULSE

GENERATOR

CLAMP CLAMP CLAMP

2456710111289

TDA8443A

3 1

FAST

SWITCHING

SELfast

switching

SYNC2B/ (B Y)

input

internal

voltage

R/ (R Y)

input

G/Y

input

B/ (B Y)

input

SYNC1

ON

input G/Y

input R/ (R Y)

input

channel 1 channel 2

SDA SCL S0 S1 S2 VGND SYNC

output clamp pulse

generator

R/ (R Y)

input

G/Y

input

B/ (B Y)

input

outputs

1995 Mar 07 4

Philips Semiconductors Product speciﬁcation

I2C-bus controlled YUV/RGB switch TDA8443A

PINNING

SYMBOL PIN DESCRIPTION

SEL 1 select input

(non-I2C-bus mode only)

SYNC2 2 synchronization input for

Channel 2

FS 3 fast switching input

R/±(R−Y)IN 4 R or (R−Y) signal input

G/Y IN 5 G or Y signal input

B/±(B−Y)IN 6 B or (B−Y) signal input

VINT 7 internal voltage supply

SYNC1 8 synchronization input for

Channel 1

ON 9 ON input

R/−(R−Y)IN 10 R or −(R−Y) signal input

G/Y IN 11 G or Y signal input

B/−(B−Y)IN 12 B or −(B−Y) signal input

SDA 13 serial data input/output; I2C-bus

SCL 14 serial clock input; I2C-bus

S0 15 address selection input 0

S1 16 address selection input 1

S2 17 address selection input 2

VP18 supply voltage

B/−(B−Y)OUT 19 B or −(B−Y) signal output

G/Y OUT 20 G or Y signal output

R/−(R−Y)OUT 21 R or −(R−Y) signal output

GND 22 ground

SYNC 23 synchronization output

CLAMP 24 clamping pulse generator

input/output Fig.2 Pin configuration.

handbook, halfpage

TDA8443A

MLD004

SEL

SYNC2

R/ (R Y) IN

G/Y IN

B/ (B Y) IN

V INT

SYNC1

R/ (R Y) IN

G/Y IN

B/ (B Y) IN

CLAMP

SYNC

GND

R/ (R Y) OUT

G/Y OUT

B/ (B Y) OUT

SCL

SDA

1995 Mar 07 5

Philips Semiconductors Product speciﬁcation

I2C-bus controlled YUV/RGB switch TDA8443A

FUNCTIONAL DESCRIPTION

The circuit contains two sets of inputs (see Fig.1). Both

channels can receive RGB or YUV signals. Each set of

inputs has its own synchronization input, which internally

generates a pulse to clamp the inputs. The internal

clamping pulse can also be controlled by a signal (e.g. a

sandcastle pulse) applied to pin 24. The pulse will occur

during the time that the signal at pin 24 is between

5.5 and 6.5 V. If both a sync signal and a pin 24 signal are

used the signal should be applied to pin 24 via a 1 kΩ

resistor.

RGB signals of Channel 2 can be matrixed to YUV signals.

The outputs can be set in a high impedance OFF state,

which allows the use of seven devices in parallel

(I2C-bus mode).

The circuit can be controlled by an I2C-bus compatible

microcontroller or directly by DC voltages. The fast

switching input can be operated via pin 16 of the

peritelevision connector.

I2C-bus mode

The protocol for the devices in I2C-bus mode is shown

in Fig.3.

Table 1 Protocol bit description

BIT DESCRIPTION

STA start condition

MA2 to MA0 address selection bits; see Table 2

ACK acknowledge bit

D7 channel selection bit; see Table 3

D6 matrix selection bit; see Table 3

D5 to D3 gain control bits; see Table 4

D2 fast switching priority bit; see Table 5

D1 and D0 output state control bits; see Table 6

STO stop condition

Fig.3 I2C-bus protocol.

handbook, full pagewidth

STA 1 1 0 1 MA2 MA1 MA0 0 ACK D7 D6 D5 D4 D3 D2 D1 D0 ACK STO

MSA003

See Table 1.

1995 Mar 07 6

Philips Semiconductors Product speciﬁcation

I2C-bus controlled YUV/RGB switch TDA8443A

Table 2 Address selection

Notes

1. L = LOW level input voltage.

2. H = HIGH level input voltage.

3. ∗= non-I2C-bus operation.

Table 3 Mode control bits D7 and D6

Table 4 Gain setting (see also Table 9)

Matrix equations

The relationship between output and input signals of the matrix is as follows:

Y = 0.3R + 0.59G + 0.11B

R−Y = 0.7R −0.59G −0.11B

B−Y=−0.3R −0.59G + 0.89B

ADDRESS SELECT PINS(1)(2) ADDRESS SELECT BITS

S2 (PIN 17) S1 (PIN 16) S0 (PIN 15) MA2 MA1 MA0

LLL∗

(3) ∗(3) ∗(3)

LLH001

LHL010

LHH011

HLL100

HLH101

HHL110

HHH111

MODE D7 D6 FUNCTION

0 0 0 Channel 2 selected, no matrix

1 0 1 Channel 2 selected, matrix active

2 1 0 Channel 1 selected

−1 1 not allowed

D5 D4 D3 A1 A2, A3, A4 B1, B3 B2

00011−1 0.45

0011111

0 1 0 not allowed −−

01111−1 0.45

10022−1 0.45

1012111

1102211

11121−1 0.45

1995 Mar 07 7

Philips Semiconductors Product speciﬁcation

I2C-bus controlled YUV/RGB switch TDA8443A

Table 5 Priority/fast switching bit D2

Note

1. X = don't care.

D2 FAST SWITCHING

(PIN 3) MODE

(1) 0 to 2, depending on

D7, D6

1 0.4 V 2

Table 6 Output state control bits

Note

1. X = don't care.

D1 D0 PIN 9 FUNCTION

(1) X(1) OFF

10LOFF

10HON

11X

(1) ON

Power-on reset

If the circuit is switched on in the I2C-bus mode, all bits of D0 to D7 are set to zero.

Table 7 Non-I2C-bus mode (S2 = S1 = S0 = L)

CONTROL MODE SWITCHED BY

FS (PIN 3) GAIN SETTINGS B1, B3 B2

PIN 13 PIN 14 PIN 1 A1 A4, A3, A2

L L L 2 or 0 1 1 1 1

L L H 2 or 0 1 2 1 1

L H L 2 or 1 1 1 −1 0.45

L H H 2 or 0 1 1 −1 0.45

H L L 2 or 0 2 1 1 1

H L H 2 or 0 2 2 1 1

H H L 2 or 1 2 1 −1 0.45

H H H 2 or 0 2 1 −1 0.45

Table 8 Fast switching input (pin 3)

FS MODE SELECTED

≤0.4 V mode 2

1 to 3 V mode 0 or mode 1 as set by control

Table 9 ON input (pin 9)

ON FUNCTION

L OFF; no output signal; high impedance

OFF-state

H function is determined in Table 7

1995 Mar 07 8

Philips Semiconductors Product speciﬁcation

I2C-bus controlled YUV/RGB switch TDA8443A

LIMITING VALUES

In accordance with the Absolute Maximum System (IEC 134).

CHARACTERISTICS

VP= 12 V; Tamb =25°C; unless otherwise speciﬁed.

SYMBOL PARAMETER MIN. MAX. UNIT

VPsupply voltage (pin 18) −14 V

VI(SDA) input voltage (pin 13) −0.3 14 V

VI(SCL) input voltage (pin 14) −0.3 14 V

Vninput voltage any other pin −0.3 VP+ 0.3 V

IO(max) maximum output current −20 mA

Tamb operating ambient temperature 0 +70 °C

Tstg IC storage temperature range −55 +125 °C

Tjmaximum junction temperature −+125 °C

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

Supply

VPsupply voltage (pin 18) 10.8 12.0 13.2 V

IPsupply current −65 90 mA

RGB/YUV channels

Gabs absolute gain difference

(programmed value) −010%

rel relative gain difference between Y output and the

(R−Y) and (B−Y) channel

outputs

−010%

between any other two

channels −05%

Iinput current −0.5 1.0 µA

|Z19-22|output impedance (pin 19) −730Ω

20-22|output impedance (pin 20) −730Ω

21-22|output impedance (pin 21) −730Ω

B bandwidth −3 dB; mode 0 or 2 −25 −MHz

+3 dB; mode 0 or 2 −12 −MHz

±3 dB; mode 1 −10 −MHz

tdiff mutual time difference at output all inputs of one source

connected together −−25 ns

Vo(p-p) maximum output amplitude of YUV

signals (peak-to-peak value) gain ×1 2.1 −−V

gain ×2 4.2 −−V

ct crosstalk note 1; fi= 5 MHz; between

inputs of same source −−−30 dB

note 1; between same source −−−40 dB

αoff isolation (OFF state) fi= 10 MHz 50 −−dB

1995 Mar 07 9

Philips Semiconductors Product speciﬁcation

I2C-bus controlled YUV/RGB switch TDA8443A

Gdiff(p-p) differential gain at nominal output

signals (peak-to-peak value) R−Y = 1.05 V (p-p) −−10 %

B−Y = 1.33 V (p-p) −−10 %

Y = 0.34 V (p-p) −−10 %

S/N signal-to-noise ratio nominal input; B = 5 MHz;

note 2 50 −−dB

SVRR supply voltage ripple rejection note 3 30 −−dB

VODC output levels during clamping −5.3 −V

Synchronization channels

Gdiff gain difference (programmed value) −−10 %

B bandwidth −3dB −50 −MHz

+3 dB; gain ×1−20 −MHz

±3 dB; gain ×2−13 −MHz

Vi(p-p) input amplitude of sync signal for

correct operation of clamp pulse

generator (peak-to-peak value)

0.2 −2.5 V

|Z23-22|output impedance (pin 23) −20 30 Ω

Vo(p-p) maximum undistorted output

amplitude (pin 23)

(peak-to-peak value)

2.5 −−V

ODC output level on top of sync pulse 1.5 1.9 2.4 V

I2C-bus inputs for SDA, SCL

VIH HIGH level input voltage 3 −VPV

VIL LOW level input voltage −0.3 −1.5 V

IIH HIGH level input current −−10 µA

IIL LOW level input current −−10 µA

I2C-bus output for SDA (open collector)

VOL LOW level output voltage IOL =3mA −−0.4 V

Address selection inputs for S0, S1, S2

VIH HIGH level input voltage 3 −VPV

VIL LOW level input voltage −0.3 −0.4 V

IIH HIGH level input current −010µA

IL LOW level input current −50 −10 0 µA

Fast switching input

VIH HIGH level input voltage 1 −3V

IL LOW level input voltage −0.3 −0.4 V

IIH HIGH level input current −0 500 µA

IIL LOW level input current −100 −−µA

sw switching time see Fig.5 −10 −ns

tdswitching delay see Fig.5 −20 −ns

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

1995 Mar 07 10

Philips Semiconductors Product speciﬁcation

I2C-bus controlled YUV/RGB switch TDA8443A

Notes

1. Crosstalkisdefined as the unwanted data transfer from an output, driven at nominal level, to other inputs andoutputs

on the IC and is expressed as a ratio in dBs.

2. Signal-to-noise ratio =

3. Supply voltage ripple rejection =

Select input

VIH HIGH level input voltage 3 −VPV

VIL LOW level input voltage −0.3 −0.4 V

IIH HIGH level input current −010µA

IL LOW level input current −50 −10 0 µA

ON input

VIH HIGH level input voltage 3 −VPV

VIL LOW level input voltage −0.3 −1.5 V

IIH HIGH level input current −−10 µA

IIL LOW level input current −−10 µA

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

20log Vop p–()

no rms()

----------------------- B 5 MHz=()

20log VRR supply()

RR at the output()

-----------------------------------------

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