ROHM BH7649KS2 Data Sheet
Summary
This high-performance integrated signal switcher manages both audio and video signals in a single chip, providing reliable connectivity for demanding applications. It features 7 composite video inputs/2 outputs and 5 audio inputs/2 outputs, enhanced with selectable gains, Low Pass Filtering (LPF), MUTE functions, and built-in isolation circuitry. The manual details its comprehensive technical specifications, operational ranges, and I²C-BUS serial control capabilities. This component is essential for building reliable signal distribution systems in automotive environments, including car navigation units and DVD players.
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High-performance Video Signal Switchers
Video･Audio Signal Switchers for Car Navigation Car DVD Player
BH7649KS2 No.11066EAT05
●Description BH7649KS2 is built-in video switch, audio switch and isolation amplifier in a single chip.
●Features 1) Video inputs selector: 7-inputs composite, Video outputs: 2-outputs 75Ω video driver, 2-outputs AMP 2) Built in Video gain switch (-6d B / -3d B / 0d B / 3d B) 3) Built in Video LPF switch (6.75MHz / Through) 4) Built in sag compensation circuit 5) Enables two load drivers 6) Video driver: Able to be used without load 7) Video driver : Able to be used without output coupling capacitor(one load) 8) Audio inputs selector: 5-inputs(Lch, Rch), Audio outputs : 2-outputs(Lch, Rch) 9) Built in Audio gain switch (0d B / -6d B) 10) Built in Audio LPF switch (24k Hz / Through) 11) Built in MUTE function 12) Audio/Video all inputs: Built in isolator function 13) Selectable isolator function for different Audio/Video input channels 14) Serial control with I2C-BUS (I2C-BUS is compatible with fast mode of Version2.0) 15) Optional Slave address modifications (90H / 92H)
●Applications Car navigation, Car DVD
●Absolute maximum ratings (Ta=+25℃)
Parameter Symbol Ratings Unit
Supply voltage VVcc VVccmax 10 V Supply voltage AVcc AVccmax 10 V Power dissipation Pd 1900 *1 m W Input voltage range I2C-BUS input (SCL, SDA) VI2CIN -0.2 ～ 7.0 V Input voltage range Video selector, LOGIC
(VIN1, VRET1, VIN2, VRET2, VIN3, VRET3, VIN4, VRET4, VIN1 -0.2 ～ 5.1 V
VIN5, VRET5, VIN6, VRET6, VIN7, VRET7, ADR)
Input voltage range Video driver (VDIN1, VDIN2) VDIN1 -0.2 ～ VVcc+0.2 V Input voltage range Audio seletor
(LIN1, ARET1, RIN1, LIN2, ARET2, RIN2, LIN3, ARET3, RIN3, VAIN1 -0.2 ～ AVcc+0.2 V
LIN4, ARET4, RIN4, LIN5, ARET5, RIN5)
Storage temperature range Tstg -55～+125 ℃ *1 When mounting on a 70mm×70mm×1.6mm 4-layer glass epoxy board Reduced by 19m W/℃ at Ta = +25℃ or higher
●Operating conditions
Parameter Symbol Ratings Unit
Supply voltage VVcc VVcc +7.5 ～ +9.5 V Supply voltage AVcc AVcc +7.5 ～ +9.5 V Operating temperature range Topr -40 ～ +85 ℃
* This product is not designed for protection against radioactive rays.
www.rohm.com 2011.04 - Rev.A 1/12 © 2011 ROHM Co., Ltd. All rights reserved.
Page Summary Contents For ROHM BH7649KS2 Data Sheet
Manual Details
| Brand | ROHM |
|---|---|
| Pages | 13 |
| File Size | 661.14 KB |
| Published | July 12, 2026 |
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Frequently Asked Questions
What are the required operating voltage parameters?
Both VCC and AVCC must operate within the range of +7.5 V to +9.5 V.
Does the switcher include protection against signal interference?
Yes, it features a built-in isolator function for all Audio/Video inputs.
Can this device be used in life-critical equipment like medical or aerospace devices?
No. Rohm warns that it should not be used where failure could directly threaten human life.
What method is provided for serial control and setup?
It supports serial control using the I²C-BUS, which is compatible with fast mode of Version 2.0.