ROHM BH7645KS2 Technical data

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Structure : Silicon Monolithic Integrated Circuit

Product name : Wide Bandwidth Audio-Video SW for TV

: BH7645KS2

Type

Outer dimensions : Fig.1 SQFP-T52

Block diagram : Fig.2

Features : 1) Video inputs selector : 2-inputs component, 2-inputs Y/C, and 2-inputs composite

2) Component inputs : Correspond to D5 standard

3) Built-in LPF selector(6.75MHz/13.5MHz/30MHz/Through)

4) Built-in Video MUTE function

5) Audio inputs selector : 6-inputs (Lch, Rch)

6) Built-in Power-on MUTE function

2

7) I

C-BUS control

8) Optional Slave address modifications(90H/92H)

2

9) I

C-BUS is compatible with fast mode of Version2.0, but not compatible with Hs mode

10) Built-in detector 3ch(S_SW1/S_SW2/S_SW3)

11) Built-in output port 2ch(PORT1_OUT/PORT2_OUT)

○Absolute Maximum Ratings (Ta=+25℃)

Parameter Symbol Ratings Unit

Supply voltage1 (2pin, 29pin, 33pin, 39pin, 44pin) Vcc1 7 V
Supply voltage2 (12pin) Vcc2 8.8 V
Power dissipation Pd 1300 *1 mW

Input voltage range

Storage temperature range Tstg -55 ～ +125 ℃

VIDEO PART, LOGIC PART V
AUDIO PART V

0 ～ Vcc1+0.2 V

IN1

0 ～ Vcc2+0.2 V

IN2

*1 When mounting on a 70mm×70mm×1.6mm PCB board

Reduced by 13mW/℃ at Ta = +25℃ or higher

○Operating Range

Parameter Symbol Range Unit
Supply voltage1 (2pin, 29pin, 33pin, 39pin, 44pin) Vcc1 +4.5 ～ +5.5 V
Supply voltage2 (12pin) Vcc2 +7.5 ～ +8.5 V
Operating temperature range Topr -40 ～ +85 ℃

* This product is not designed for protection against radioactive rays.
* Note the power supply sequence.

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○Electrical characteristics （Unless otherwise specified, Ta= 25℃, Vcc1=5.0V, Vcc2=8.0V）

Item Symbol

Min. Typ. Max.

[VIDEO PART]

Circuit current ICCV － 55 80 mA No signal

Voltage gain GVV -0.5 0.0 0.5 dB Vin=1.0Vpp, f=100kHz

Frequency characteristics1

[f=6.75MHz LPF MODE]

Frequency characteristics 2

[f=13.5MHz LPF MODE]

Frequency characteristics 3

[f=30MHz LPF MODE]

Frequency characteristics 4

[f=THROUGH MODE]
Maximum output level VOM

SW crosstalk CTSW

Channel crosstalk CTCH

GF
GF
GF
GF
GF
GF

GF

1-1V

1-2V

2-1V

2-2V

3-1V

3-2V

4-1V

-1.5 0.0 1.0 dB Vin=1.0Vpp, f=6.75MHz/100kHz

-1.5 0.0 1.0 dB Vin=1.0Vpp, f=13.5MHz/100kHz

-1.5 0.0 1.0 dB Vin=1.0Vpp, f=30MHz/100kHz

-3.0 -0.5 2.0 dB Vin=1.0Vpp, f=54MHz/100kHz

V

V

V

MUTE attenuation MTV － -60 -50 dB Vin=1.0Vpp, f=10MHz

Bias input terminal Input impedance ZINV 100 150 － kΩ

[AUDIO PART] (at Gain=0dB)

Circuit current ICCA － 10 15 mA No signal

Voltage gain

0dB GV0A -0.5 0.0 0.5 dB Vin=1.0Vrms, f=1kHz
6dB GV6A 5.5 6.0 6.5 dB Vin=1.0Vrms, f=1kHz

Frequency characteristics GFA -3.0 0.0 3.0 dB Vin=1.0Vrms, f=50kHz/1kHz

Total harmonic distortion THDA － 0.03 0.1 % Vin=1.0Vrms, f=1kHz ※1

0dB VOM0

A

Maximum output level

6dB VOM6

Channel crosstalk CTCH

SW crosstalk CTSW

A

A

A

MUTE attenuation MTA － -100 -85 dB Vin=2.0Vrms, f=1kHz ※1

Remain noise NA － 30 50 uVrms ※1

PSRR PSRR

Input impedance ZINA 100 150 － kΩ

[LOGIC PART etc.]

VIL Vin1L 0 － 1.0 V Low Level input voltage
[SCL]
[SDA]

VIH Vin1H 2.0 － Vcc1 V High Level input voltage

Input bias current IINI2C -10 0 10 uA

SDA output voltage VinL 0 － 0.4 V IL=3.0mA(sink)

VIL Vin2L 0 － 1.0 V Low Level input voltage
[ADR]

[S_SW1]
[S_SW2]
[S_SW3]

[PORT1_OUT]
[PORT2_OUT]

VIH Vin2H 2.0 － Vcc1 V High Level input voltage

Input impedance ZIN

ADR

VIL Vin2L 0 － 1.0 V Low Level input voltage

VIH Vin2H 2.0 － Vcc1 V High Level input voltage

Input impedance ZIN

PORT output

voltage

V

PL

100 150 － kΩ Pull up resistance

SSW

－ － 0.5 V I

Leak current IPH － － 5.0 uA Vcc2=8.0V

Limits

Unit Conditions

- -30 -20 ｄB Vin=1.0Vpp, f=27MHz/100kHz

- -30 -20 dB Vin=1.0Vpp, f=54MHz/100kHz

- -18 -10 dB Vin=1.0Vpp, f=74MHz/100kHz

2.6 3.0 - Vpp f=10kHz, THD=1.0%
－ -60 -50 dB Vin=1.0Vpp, f=10MHz
－ -60 -50 dB Vin=1.0Vpp, f=10MHz

2.0 2.4 － Vrms

2.0 2.4 － Vrms

Maximum value of distortion<0.3%

Maximum value of distortion<0.3%

－ -100 -85 dB Vin=2.0Vrms, f=1kHz ※1
－ -100 -85 dB Vin=2.0Vrms, f=1kHz ※1

－ -45 -38 dB ※2

70 100 130 kΩ

※1 400HzHPF + 30kHzLPF ON
※2 Vin=0.3Vpp, f=100Hz at VCC, 30kHzLPF ON

f=1kHz ※1

f=1kHz ※1

=2.5mA

L

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系

W

W

○Physical dimensions ○Block diagram

CY/Y/

Vcc5V RGBout

PORT1 OUT

CYin1

ADDRESS

CYin2

PBin1

TEST1

PBin2

S SW3

S SW2

PRin1

S SW1

PRin2

40

41

42

43

44

45

46

47

48

49

50

51

52

Clamp

Clamp

1 2 3 4 5 6 7 8 9 10 11

Y1in1

： テレビ用Hd 対応AVス

BH7645KS2

：

BH7645KS2

： 1) ビデオ入力セレクタ：

ネント 入力2系統、Y/C 入力2

Lot No.

Fig.1 SQFP-T52 ( UNIT:mm )

Vcc5V Video IN2

Bias

Bias

S SW

Bias

Bias

CVBSout1

PBout1

GND RGBout

PR/Cout1

DVcc5V

SDA

SCL

Gain_SEL

0/6dB

0/6dB

Bias

C1in1

DGND

P-on
Mute

P-on
Mute

Audio_SW

Mute

6in-1out

Mute

Vref AU

GND

I2C LOGIC

0dB

0dB

CY_S

6.75M/13.5M/

Mute

30M/Through

PB_S

Mute

PR_SW

Mute

Y_SW

Clamp

Clamp

Clamp

CVBS1

Vcc5V Video IN1

Y1in2

Vref Video

LPF1

LPF2

6.75M/13.5M/
30M/Through

LPF3

6.75M/13.5M/
30M/Through

Clamp

GND

0dB

C_SW

Bias

CVBS2

GND Video IN

Lout

12 13

Vcc8V AU

Rout

2728

GND AU

26

R6in

25

L6in

24

R5in

23

L5in

22

R4in

21

L4in

20

R3in

19

L3in

18

R2in

17

L2in

16

R1in

15

L1in

14

PORT2 OUT

Vcc5V AU

2930 31 32 33 34 3536373839

C1in2

Fig.2 Block diagram

Pin number Pin name Pin number Pin name Pin number Pin name Pin number Pin name

1 Y1in1 14 L1in 27 Rout 40 PORT1 OUT
2 Vcc5V Video IN1 15 R1in 28 Lout 41 CYin1
3 CVBS1 16 L2in 29 Vcc5V AU 42 ADDRESS
4 Vref Video 17 R2in 30 DGND 43 CYin2
5 Y1in2 18 L3in 31 SCL 44 Vcc5V Video IN2
6 GND 19 R3in 32 SDA 45 PBin1
7 CVBS2 20 L4in 33 DVcc5V 46 TEST1
8 GND Video IN 21 R4in 34 PR/Cout1 47 PBin2

9 C1in1 22 L5in 35 GND RGBout 48 S SW3
10 Vref AU 23 R5in 36 PBout1 49 S SW2
11 C1in2 24 L6in 37 GND 50 PRin1
12 Vcc8V AU 25 R6in 38 CY/Y/CVBSout1 51 S SW1
13 PORT2 OUT 26 GND AU 39 Vcc5V RGBout 52 PRin2

Pin number and Pin name

○

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○Cautions for use

(1) Absolute maximum ratings

If the absolute maximum ratings for applied voltage and/or operation temperature are exceeded, LSI damage may result.
Therefore, do not apply voltage or use in a temperature that exceeds these absolute maximum ratings.
If it is possible that absolute maximum ratings will be exceeded, use a physical safety device such as a fuse and make
sure that no conditions that might exceed the absolute maximum ratings will be applied to the LSI IC.

(2) Power supply line

Design PCB pattern to provide low impedance for the wiring between the power supply and the GND lines.
In this regard, for the digital block power supply and the analog block power supply, even though these power supplies
has the same level of potential, separate the power supply pattern for the digital block from that for the analog block,

thus suppressing the diffraction of digital noises to the analog block power supply resulting from impedance common to

the wiring patterns. For the GND line, give consideration to design the patterns in a similar manner.

Furthermore, for all power supply terminals to ICs, mount a capacitor between the power supply and the GND terminal.
At the same time, in order to use an electrolytic capacitor, thoroughly check to be sure the characteristics of the
capacitor to be used present no problem including the occurrence of capacity dropout at a low temperature, thus
determining the constant.

(3) GND potential

Regardless of the operation mode, the voltage of the GND pin should be at least the minimum voltage.

Actually check whether or not the voltage at each pin, including transient phenomena, is less than the GND pin voltage.

(4) Thermal design

The thermal design should be done using an ample margin that takes into consideration the allowable dissipation under
actual use conditions.

(5) Shorts between pins and mounting errors

When mounting LSI ICs onto the circuit board, make sure each LSI's orientation and position is correct.
The ICs may become damaged if they are not mounted correctly when the power is turned on.
Similarly, damage may also result if a short occurs, such as when a foreign object is positioned between pins in an IC,
or between a pin and a power supply or GND connection.

(6) Operation in strong electromagnetic field

When used within a strong electromagnetic field, evaluate carefully to avoid the risk of operation faults.

(7) Power supply sequence

[Power-up sequence]

Supply voltage1 (Vcc1 : 2pin, 29pin, 33pin, 39pin, 44pin) must be powered up before or at the same time as the
supply voltage2 (Vcc2 : 12pin).

[Power-down sequence]

Supply voltage2 (Vcc2 : 12pin) must be powered up before or at the same time as the supply voltage1(Vcc1 : 2pin,
29pin, 33pin, 39pin, 44pin).

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Notes

No copying or reproduction of this document, in par t or in whole, is permitted without the
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The content specied herein is for the purpose of introducing ROHM's products (hereinafter
"Products"). If you wish to use any such Product, please be sure to refer to the specications,
which can be obtained from ROHM upon request.

Examples of application circuits, circuit constants and any other information contained herein
illustrate the standard usage and operations of the Products. The peripheral conditions must
be taken into account when designing circuits for mass production.

Great care was taken in ensuring the accuracy of the information specied in this document.
However, should you incur any damage arising from any inaccuracy or misprint of such
information, ROHM shall bear no responsibility for such damage.

The technical information specied herein is intended only to show the typical functions of and
examples of application circuits for the Products. ROHM does not grant you, explicitly or
implicitly, any license to use or exercise intellectual property or other rights held by ROHM and
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Notice

The Products specied in this document are intended to be used with general-use electronic
equipment or devices (such as audio visual equipment, ofce-automation equipment, commu­nication devices, electronic appliances and amusement devices).

The Products specied in this document are not designed to be radiation tolerant.

While ROHM always makes efforts to enhance the quality and reliability of its Products, a
Product may fail or malfunction for a variety of reasons.

Please be sure to implement in your equipment using the Products safety measures to guard
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