Sony CXA2040Q Datasheet

I2C Bus-Compatible Video Switch

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Description

The CXA2040Q is an I2C bus-compatible 5-input,

3-output video switch for TVs.

Features

• Serial data control via I2C bus

• 5 composite video input systems

• 2 Y/C (S terminal) input systems

• 3 composite video output systems

• 1 Y/C (S terminal) output system

• Input can be selected independently for each

output system.

• SYNC_ID function for CV1 system input

• Built-in 6dB amplifier for CVOUT2 system output

• Built-in Y/C MIX circuit

• Slave address can be changed (90H/92H).

• High impedance maintained by I2C bus line (SDA,

SCL) even when power is OFF.

Applications

TVs

Pin Configuration (Top View)

CXA2040Q

32 pin QFP (Plastic)

Absolute Maximum Ratings (Ta = 25°C)

• Supply voltage VCC 12 V

• Operating temperature Topr –20 to +75 °C

• Storage temperature Tstg –65 to +150 °C

• Allowable power dissipation PD 1.0 W

(when mounted on a 50mm × 50mm board)

Operating Conditions

Supply voltage VCC 9.0 ± 0.5 V

Structure

Bipolar silicon monolithic IC

CV2

CC

V

CV3

NC

CV4

GND

CV5

BIAS

25

26

27

28

29

30

31

32

24

NC

23

1

2

Y1

CV1

NC

SYNCTC

22

3

C1

21

4

SDA

S1

20

5

SCL

Y2

19

6

ADR

S2

18

NC

CVOUT1

17

NC

16

CVOUT2

15

NC

14

13

CVOUT3

12

NC

YOUT

11

10

NC

9

COUT

8

7

C2

NC

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 –

E95Z44-ST

Block Diagram

30

GND

26

CXA2040Q

CC

V

SCL

20

SDA

21

2

C BUS DECODER

I

19

ADR

S1

4

S2

6

SYNCTC

CV1

CV2

CV3

CV4

CV5

Y1

C1

22

23

25

27

29

31

SYNC DETECT

CV1
CV2

CV1

CV2

CV3

CV4

CV5

1

3

CV6

CV3
CV4
CV5
CV6
CV7

MUTE

CV1
CV2
CV3
CV4
CV5
CV6
CV7

MUTE

CV1
CV2
CV3
CV4
CV5
CV6
CV7

MUTE

SW1

SW2

SW3

6dB

17

15

13

CVOUT1

CVOUT2

CVOUT3

5

Y2

C2

7

32

BIAS

∗

Numbers inside circles indicate the IC pin numbers.

BIAS

CV7

MUTE

Y1
Y2

MUTE

C1
C2

MUTE

– 2 –

SW4

SW5

11

9

YOUT

COUT

Pin Description

Pin

Symbol Pin voltage Equivalent circuit Description

No.

1

Y1

5

Y2

3

C1

7

C2

46S1

S2

4.5V

CXA2040Q

V

CC

Y/C separation signal inputs.
Biased to approximately 4.5V.

1
5
3
7

20k

147

× 2

28k

Input the input signals through
capacitors. Connect protective
resistor of 220Ω between these
pins and the capacitors.
Y1 and Y2 pins: Luminance

signals input.

C1 and C2 pins: Chrominance

signals input.

CC

V

Applying a DC voltage to S1 and
S2 pins allows these voltages to
be applied to the microcomputer

50k

50k

4

6

100k

× 4

as the I2C bus status register data.
S1, S2 = 0 to 2V

OPEN = 0, SEL = 1

S1, S2 = 4.75 to 7.25V

OPEN = 0, SEL = 0

S1, S2 = 9.5 to 12V

OPEN = 1, SEL = 0

119YOUT

COUT

17

CVOUT1

15

CVOUT2

13

CVOUT3

4.5V

4.5V

200 1.2k

× 5

11

× 6

9

200 1.2k

× 5

17

15

× 6

13

× 2

× 2

× 2

× 2

VCC

Y/C signal outputs.
YOUT pin: Luminance signal

output.

COUT pin: Chrominance signal

output.

VCC

Composite video signal outputs.
CVOUT1, CVOUT2:

0dB output with respect to
the input signal.

CVOUT2:

+6dB output with respect
to the input signal.

– 3 –

Pin

Symbol Pin voltage Equivalent circuit Description

No.

VCC

CXA2040Q

19 ADR

20 SCL —

20

19

× 4

72k

28k

4k

Selects the slave address for the
I2C bus.

90H at 1.0V or less
92H at 3.5V or more
90H when open

V

CC

I2C bus signal input.
Connect protective resistor of
220Ω between this pin and the
SCL line.

21 SDA —

22 SYNCTC

22

21

× 6

147

147

1.2k

4k

1.2k

CC

V

I2C bus signal input.
Connect protective resistor of
220Ω between this pin and the
SDA line.

CC

V

Sync tip clamp time constant for
Sync Separation.
Connect 68kΩ resistor between
this pin and VCC.
Connect 10µF capacitor between
this pin and GND.

– 4 –

Pin

Symbol Pin voltage Equivalent circuit Description

No.

CXA2040Q

23 CV1 4.5V

25

CV2
27
29
31

CV3

CV4

CV5

4.5V

23

25
27
29
31

20k

147

28k

20k

147

28k

V

CC

Composite video signal input.
Biased to approximately 4.5V.
Input the input signal through
capacitor. Connect protective
resistor of 220Ω between this pin
and the capacitor.
The composite video signal input
to CV1 is also taken into the
"SYNC DETECT circuit" of which
SYNC is existed or not.

V

CC

Composite video signal input.
Biased to approximately 4.5V.
Input the input signals through
capacitors. Connect protective
resistor of 220Ω between these
pins and the capacitors.

26 VCC

30 GND

32

BIAS

2

8
10
12
14

NC
16
18
24
28

9.0V

0.0V

4.5V

∗1

∗1

32

1.2k

20k

22.5k

Power supply.
Apply 9.0V.

GND.

CC

V

4.5V bias.
Attach a decoupling capacitor
between this pin and GND.
This pin cannot be used as an
external power supply.

NC (not connected).
Connect to GND.
If these NC pins are not connected
to GND, the cross talk and other
desired values indicated in the
Electrical Characteristics cannot
be obtained.

– 5 –

∗1

Applied externally.

CXA2040Q

V

mA

39.0

4.75

27.7

4.50

18.0

4.25

Measurement contents Min. Typ. Max. Unit

Measure the pin inflow

current.

Measure the pin voltage.

VCV11

dB

0.40

0.00

–0.40

VCV11

0.3Vp-p

20Log

VCV21

dB

6.75

6.25

5.75

VCV21

0.3Vp-p

20Log

VCVM11

dB

0.60

0.10

–0.40

VCVM11

0.3Vp-p
Since the sum of 0.15Vp-p

and 0.15Vp-p is input to

each switch, calculations

20Log

∗

are performed with 0.3Vp-p.

26

32

15

13, 17

Measurement pins

C bus

2

C bus

2

Measurement conditions

CC = 9V, no signal

V

VCC = 9V, no signal

CV1 In, CV2 In, CV3 In,

CV4 In or CV5 In

100kHz, 0.3Vp-p CW

Select each input with I

control and obtain the I/O gain.

CV1 In, CV2 In, CV3 In,

CV4 In or CV5 In

100kHz, 0.3Vp-p CW

Select each input with I

control and obtain the I/O gain.

Y1 and C1 (CV6) In or

Y2 and C2 (CV7) In

See Electrical Characteristics Measurement Circuit 1 for all other items.

Symbol

CC

VBIAS

I

GCV11

GCV21

13, 17

C bus

2

100kHz, 0.15Vp-p CW

Select each input with I

control and obtain the I/O gain.

GCVM11

Electrical Characteristics See Electrical Characteristics Measurement Circuit 2 for Cross talk and MUTE. (Ta = 25°C, VCC = 9V)

Current

No. Item

consumption

Pin voltage

1

2

CV system

gain 1

3

CV system

gain 2

4

– 6 –

CV system

(Y/C MIX)

gain 1

5

CXA2040Q

Typ. Max. Unit

Measurement contents Min.

VCVM21

dB

7.05

6.40

5.75

VCVM21

0.3Vp-p
Since the sum of 0.15Vp-p

and 0.15Vp-p is input to

each switch, calculations

20Log

∗

are performed with 0.3Vp-p.

VY11

dB

0.40

0.00

–0.40

VY11

0.3Vp-p

20Log

VC11

dB

0.40

0.00

–0.40

VC11

0.3Vp-p

20Log

VCV12

dB

0.55

–0.15

–0.85

VCV12

20Log

VCV11

VCV11 and VCV12 should be

∗

the same I/O.

15

Measurement pins

C bus

2

Measurement conditions

Y1 and C1 (CV6) In or

Y2 and C2 (CV7) In

100kHz, 0.15Vp-p CW

Symbol

Select each input with I

CVM21

G

11

C bus

2

control and obtain the I/O gain.

Y1 In or Y2 In

100kHz, 0.3Vp-p CW

Select each input with I

control and obtain the I/O gain.

GY11

9

C bus

2

C1 In or C2 In

100kHz, 0.3Vp-p CW

Select each input with I

control and obtain the I/O gain.

GC11

13, 17

C bus

2

CV1 In, CV2 In, CV3 In,

CV4 In or CV5 In

10MHz, 0.3Vp-p CW

Select each input with I

control and obtain the I/O gain.

Then obtain the difference from the

I/O gain measured by Test 3.

∆GCV12

Item

No.

CV system

(Y/C MIX)

gain 2

6

Y system

gain

7

– 7 –

C system

gain

8

CV system

frequency

response 1

9