BA7630F_技术文档

Multimedia ICs

Video switch for CANAL-Plus decoder

BA7630S / BA7630F

The BA7630S and BA7630F are decoder switching ICs for the scrambled broadcasts in France. The ICs include a 3-

input multiplexer, 2-input multiplexers with 6dB amplifiers, and a 9-bit serial-to-parallel converter.

These ICs greatly simplify decoder switching, and can be connected to a control microprocessor using just two lines.

Applications

•

Video cassette recorders

Features

•

1) All the switching functions required for SECAM

CANAL plus decoder integrated onto one chip.

2) Built-in 9-bit serial-to-parallel converter for decoder

and TV control reduces number of microprocessor

wiring connections required.

3) Inputs have a sync-tip clamp.

4) The switch section can be used independently.

5) Low power consumption off a 5V supply.

Absolute maximum ratings (Ta = 25°C)

•

Parameter

Symbol

V^CC

Limits

Unit

1

Power supply voltage

9

V

2

BA7630S

BA7630F

500

Power dissipation

Pd

mW

3

600

Topr

Tstg

– 25 ~ + 70

°C

Operating temperature

Storage temperature

1 13V for switches 1 to 9.

– 55 ~ + 125

2 Reduced by 5.0mW for each increase in Ta of 1°C over 25°C.

3 Reduced by 6.0mW for each increase in Ta of 1°C over 25°C.

Recommended operating conditions (Ta = 25°C)

•

Parameter

Symbol

V^CC

Min.

4.5

Typ.

5.0

Max.

5.5

Unit

Power supply voltage

V

1

Multimedia ICs

BA7630S / BA7630F

Block diagram

•

22

21

20

19

18

17

16

15

14

13

12

BA7630S

BUFF

SW4

CONTROL

LOGIC

LATCHES

6dB

AMP

SW

3

SW12

SHIFT

REGISTER

SW

2

1

LOGIC

6dB

AMP

SW4

SW1

SW2

SW3

1

2

3

4

5

6

7

8

9

10

11

28

27

26

25

24

23

22

21

20

19

18

17

16

15

BA7630F

BUFF

SW4

CONTROL

LOGIC

LATCHES

6dB

AMP

SW3

SW12

SHIFT

REGISTER

SW

2

1

LOGIC

6dB

AMP

SW4

SW

1

SW2

SW3

1

2

3

4

5

6

7

8

9

10

11

12

13

14

Pin descriptions

•

Pin No.

Pin name

Pin No.

Pin name

1

2

3

4

5

6

7

8

9

IN 4

12 (15) OUT 2

13 (16) GND

CC

V

IN 1

14 (17) SW 4 IN / OUT

15 (20) SW 5 OUT

16 (21) SW 6 OUT

17 (22) SW 7 OUT

18 (23) SW 8 OUT

19 (24) CLOCK IN

20 (26) DATA IN

21 (27) SW 9 OUT

22 (28) OUT 1

(5)

(6)

(7)

(8)

(9)

RESET IN

IN 2

GND

IN 3

SW 1 IN / OUT

(10) SW 2 IN / OUT

10 (13) SW 3 IN / OUT

11 (14) OUT 3

Pin numbers in parentheses are for the BA7630F.

2

Multimedia ICs

BA7630S / BA7630F

Electrical characteristics (unless otherwise noted Ta = 25°C and VCC = 5.0V)

•

Measurement

Parameter

Symbol

I^CC

Min.

—

Typ.

28

Max.

40

Unit

mA

Conditions

Circuit

Supply current

Analog

—

Fig.1

Maximum output level

Voltage gain 1

2.5

– 0.5

5.5

2.8

0

—

f = 1kHz, THD = 0.5%

f = 1MHz, VIN = 1.0VP-P

V^om

G^V1

GV2

V^P-P

dB

0.5

6.5

Voltage gain 2

6.0

dB

10MHz / 1MHz

V^IN= 1.0VP-P

Fig.1

Frequency characteristic

Interchannel crosstalk

– 4.0 – 1.5 + 1.0

dB

Gf

f = 4.43MHz

V^IN= 1.0P-P

—

– 60

2.0

– 45

3.0

dB

V

CTM

—

SW¹~ SW4 switch level

Digital

VTH1 ~ 4

1.0

"H" input voltage

3.0

—

2

—

1.0

10

V

—

V^IH

V^IL

Fig.3

Fig.2

"L" input voltage

—

"H" input current

—

µA

V

—

I^IH

"L" input current

IIL

– 80 – 100 – 150

"H" output leakage current 1

"H" output leakage current 2

"L" output voltage

Maximum clock frequency

Setup time

150

—

230

0

350

50

VCC = 12V

ICC = 2mA

—

I^{QH1 ~ 4}

I^{QH5 ~ 9}

V^QL

f^Max.

t^su

—

0.1

500

0.1

0.5

—

250

—

kHz

µs

Fig.1

1.0

—

3

Multimedia ICs

BA7630S / BA7630F

Measurement circuits

•

BA7630S

Distortion

meter

Distortion

meter

V

~

V

~

1

2

SW

K

SWJ

22

21

20

19

18

17

16

15

14

13

12

BUFF

SW

4

BUFF

CONTROL

LOGIC

LATCHES

6dB

AMP

SW12

SW

3

SW12

SHIFT

REGISTER

SW

2

1

LOGIC

6dB

AMP

SW

4

SW

1

SW

2

SW

3

V

CC5.0V

1

2

3

4

5

6

7

8

9

10

11

A

47µ

1µ

+

SW

1

B

SWC

SW

D

SW

E

SW

F

SW

1

G

SW

1

H

SW

1

I

SW

1

A

2

1

2

OSC

Distortion

meter

V

~

3V

1V

Fig.1

4

Multimedia ICs

BA7630S / BA7630F

BA7630S

Output

Measurement Circuit

VCC = 5.0V

Input

Measurement Circuit

47µ

1

22

21

BIAS

BUFF

+

5.0V

2

3

Input

SW12

Measurement Circuit

A1

A

20

SHIFT

REGISTER

CONTROL

LOGIC

SW

1

4

5

6

19

18

17

Output

Measurement Circuit

A2

V

A

SW1SW2

SW0

Output

Measurement Circuit

A3

12V

SW12

LOGIC

7

8

9

16

15

14

LATCHES

SW

1

V

Output

V1

Measurement Circuit

SW2

Output

Measurement Circuit

SW

4

SW

3

10

11

13

12

Output

Measurement Circuit

SW

3

6dB

AMP

6dB

AMP

BUFF

Output

Measurement Circuit

Output

Measurement Circuit

Fig.2

5

Multimedia ICs

BA7630S / BA7630F

BA7630S

VCC = 5.0V

12V

47µ

22

21

20

19

18

17

1

BIAS

BUFF

PG

C

L

+

R

L

SW

9

2

3

SW12

50Ω

PG

SHIFT

REGISTER

CONTROL

LOGIC

4

5

CL

50Ω

RL

SW8

C

L

SW1SW2

R

L

PG

SW

7

6

7

C

SW12

R

LOGIC

SW

16

12V

C

L

LATCHES

CL

R

L

SW

1

RL

SW

5

4

15

14

8

9

C

SW

1

C

L

R

SW

4

SW

2

RL

SW

2

3

SW

4

C

RL

SW

3

13

12

10

11

SW

3

6dB

AMP

6dB

AMP

BUFF

Fig.3

6

Multimedia ICs

BA7630S / BA7630F

Measurement conditions

•

Measure-

ment

Switch setting

Parameter

Symbol

I^CC

SW^A

2

SW^B

2

SW^C

2

SW^D

2

SW^E

SW^F

SW^G

SW^H

2

SW^I

SW^J

SW^K

method

Current

2

×

—

dissipation

V^om1-1

V^om2-1

V^om3-1

2

1

2

1

2

1

2

1

2

×

2

Maximum

output level

Note 1

Note 2

Note 3

V^om1-2

V^om3-2

2

1

2

1

×

1

2

×

1

2

×

1

2

×

2

×

1

2

×

2

×

1

Vom2-3

V^om4-3

2

1

2

1

2

×

1

2

×

1

2

Gv11-2

G^v13-2

G^v12-3

G^v14-3

2

1

2

1

2

1

2

×

1

×

2

Voltage gain 1

Voltage gain 2

×

2

×

Gv21-1

G^v22-1

G^v23-1

2

1

2

1

2

1

×

G^f1-1

G^f2-1

G^f3-1

2

1

2

1

2

1

2

Frequency

characteristics

G^f1-2

G^f3-2

2

1

2

1

×

2

×

2

×

G^f2-3

G^f4-3

2

1

2

1

2

×

1

2

×

C^TM1-1-2

C^TM1-1-3

C^TM2-1-1

C^TM2-1-3

C^TM3-1-1

C^TM3-1-2

2

1

2

1

2

1

2

1

2

1

2

1

2

1

2

1

2

×

1

Note 4

Interchannel

crosstalk

C^TM1-2-3

C^TM3-2-1

2

1

2

1

2

×

1

2

×

1

×

C^TM2-3-4

C^TM4-3-2

1

2

1

2

×

1

2

1

×

The measurements in the above table were made with switching voltage levels for SW1 to SW4 of "L" = 1V, and "H" = 3V.

Note 1: Connect distortion meters to the outputs. Adjust the input level so that the output distortion is 0.5% for a f = 1kHz sine wave input.

This output voltage is the maximum output level Vom (VP-P).

Note 2: Input a f = 1MHz, 1V^P-Psine wave. The voltage gain GV = 20 log VOUT / VIN (dB).

Note 3: Input a f = 1MHz and 10MHz, 1V^P-Psine wave. The frequency characteristic Gf = 20 log VOUT (f = 10M) / VOUT (f = 1M) (dB).

Note 4: Input a f = 4.43MHz, 1V^P-Psine wave.

0dB amplifier SW crosstalk is C^TM0, and the 6dB amplifier SW crosstalk is CTM6.

C^TM0= 20 log VOUT / VIN (dB)

C^TM6= 20 log VOUT / VIN + 6 (dB)

7

Multimedia ICs

BA7630S / BA7630F

Circuit operation

•

Digital block truth table

INPUT

OUTPUT

SW ···························SW

H····································H

Note

1

9

Reset Clock

Data

×

H

—

H

L

×

L

H

↑

1-O

9-O

—

SW ·····················SW

1-O

—

SW ·····················SW

1-O

SW ·····················SW

Data "L" sent to internal shift register

Data "H" sent to internal shift register

Internal shift register data unchanged

↑

L

SW^1-O·····················SW^9-O

1-O

9-O

↓

L

SW ·····················SW

Contents of internal shift register sent to

internal latch

1-N

9-N

L

↓

H

SW ·····················SW

Note 1: H: high level

Note 2: L: low level

^{Note 3:}×: either H or L

Note 4: ↑: L to H transition

Note 5: ↓: H to L transition

Note 6: SW^1-Oto SW9-O: SW1 to SW9 levels before establishing the input conditions shown in the table.

Note 7: SW1-N to SW9-N

nearest clock ↓ transition.

Analog truth table

(1) OUT1 switch

SW¹

L

SW²

L

RESET

SELECT

IN1

H

L

H

IN2

H

L

IN3

H

IN3

(2) OUT2 switch

SW³

L

RESET

SELECT

H

IN1

IN3

H

(3) OUT3 switch

SW⁴

L

RESET

SELECT

IN2

H

IN4

Note: When using the switches independently

without the digital block, the RESET pin

must be set to "H".

8

Multimedia ICs

BA7630S / BA7630F

Digital circuit operation

•

(1) Introduction

The BA7630S has 9-bit serial-to-parallel converter and

latch circuit that has been included to expand the num-

ber of microprocessor output ports. The breakdown

voltage of the output pins is 13V, so switch them in the

range 0 to 12V. In addition to controlling the BA7630S

switching block, these outputs can be used to control

audio switching, scrambling decoders, and television

sets.

(3) Pulse timing

The pulse timing diagrams are given below.

CLK

DATA

t

su

t

su

0.1µs (Typ.) 1.0µs (Max.)

(2) Using the serial-to-parallel convertor block

Signal input is basically done using clock and date

pulses. As shown in Fig.10, the date is read on the ris-

ing edge of the clock pulses. If the date is “H” on the

rising edge of the clock pulse, a “L” data bit is input to

the shift register, and if the data is “L” on the rising

edge of the clock pulse, a “H” data bit is input to the

shift register. The shift register is sequentially incre-

mented by the bit corresponding to SW¹. Data in

excess of 9 bits is sequentially discarded.

Fig. 6 Clock rising edge and data relationship

(setup time)

CLK

DATA

t

su

tsu

If the data is “H” on a falling edge of the clock, the con-

tents of the shift register are read into the internal latch,

and simultaneously output to the output port (the data

polarity is inverted on output). This output is maintained

until the latch is setup again.

0.1µs (Typ.) 1.0µs (Max.)

Fig. 7 Clock falling edge and data relationship

(setup time)

To reset, set the RESET pin to “H”. The internal shift

register and latch contents go low (latch output all “H”),

for the duration that RESET is held high.

RESET

SW

1 ~ SW9

OUT

CLK

t

PLH

tPHL

0.26µs (Typ.) 2.0µs (Max.)

DATA

Fig. 8 Reset and output relationship

(reset transmission time)

1

2

3

4

5

At points 1 to 4 data is input to the shift register.

At point 5 the contents of the shift register are transferred to the

latch and simultaneously output.

Fig. 4 CLK and DATA relationship

Data flow

CLK

DATA

Data in

Shift register

1

2

3

4

5

6

7

8

9

SW1 ~ SW9

OUT

Latch

Reset

—

Q

—

Q

—

Q

—

Q

—

Q

—

Q

—

Q

—

Q

—

Q

Latch

t

PLH9

tPHL

1.2µs (Typ.) 5.0µs (Max.)

SW1 SW2

SW9

Fig. 9 Clock falling edge and output relationship

(latch transmission time)

Fig. 5 Digital block

9

Multimedia ICs

BA7630S / BA7630F

Timing chart

•

RESET

DATA

CLOCK

SW¹

SW2

SW3

SW4

SW5

SW6

SW7

SW8

SW9

RESET

DATA

RESET

Fig.10

10

Multimedia ICs

BA7630S / BA7630F

Application examples

•

(1) Analog block

BA7630S pin layout

V

CC1

V

CC

IN1

IN2

from

3

5

2

5V

VTR TUNER OUT

1µF

75Ω

+

47µF

OUT1

OUT2

from

DECODER OUT

22

12

11

13

to VCR

V

CC2

1µF

75Ω

R

75Ω

to

DECODER IN

470 ~ 1000µF

2SA933

6dB

AMP

IN3

IN4

from

7

1

6

V

CC2

TV OUT

1µF

75Ω

R

to

OUT3

GND

TV IN

470 ~ 1000µF

2SA933

6dB

AMP

from

VIDEO OUT

V^CC2

5V

R

1µF

75Ω

100

390

GND

12V

Fig.11

(2) Digital block

VCC 4.5 ~ 13V

22k

SW OUT

SW¹~ SW9

SW1 ~ SW4

ONLY

OPEN

COLLECTOR

50kΩ

28kΩ

Fig.12

11

Multimedia ICs

BA7630S / BA7630F

Electrical characteristic curves

•

0

– 10

– 20

3pin-22pin

5pin-22pin

7pin-22pin

3pin-22pin

5pin-22pin

7pin-22pin

1pin-11pin

5pin-11pin

3pin-12pin

7pin-12pin

Input 1V^P-P

VIN

=

10VP-P

VIN = 1.0VP-P

0

– 2

– 4

– 6

– 8

– 10

– 12

– 14

– 16

– 18

– 20

6

4

2

0

– 2

– 4

– 6

– 8

– 10

– 12

– 14

– 30

– 40

– 50

– 60

– 70

100k 200k 500k 1M 2M

5M 10M 20M30M

100k 200k 500k 1M 2M 5M 10M 20M30M

FREQUENCY (Hz)

100k 200k 500k 1M 2M

5M 10M 20M

FREQUENCY (Hz)

Fig. 13 Frequency characteristic(OUT1)

Fig. 15 Frequency characteristic

(OUT2 and OUT3)

Fig. 14 Crosstalk characteristic (OUT1)

0

1pin-11pin

5pin-11pin

3pin-12pin

7pin-12pin

Input 1V^P-P

– 10

– 20

– 30

– 40

– 50

– 60

– 70

100k 200k 500k 1M 2M

5M 10M 20M

FREQUENCY (Hz)

Fig. 16 Crosstalk characteristic

(OUT2 and OUT3)

External dimensions (Units: mm)

•

BA7630S

BA7630F

18.5 ± 0.2

19.4 ± 0.3

28

15

22

12

7.62

1

11

1

14

0° ~ 15°

1.27

0.4 ± 0.1

1.778

0.5 ± 0.1

0.3Min.

0.15

SDIP22

SOP28

12


型号：	BA7630F
厂家：	ROHM
描述：	Video switch for CANAL-Plus decoder 视频开关CANAL加解码器解码器开关消费电路商用集成电路光电二极管
文件：	总12页 (文件大小：171K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

BA7630F [ROHM]

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