ROHM BH7645KS2 Data Sheet
Summary
This wide bandwidth A/V switch IC is a critical component for manufacturers building advanced television and home entertainment systems. It provides centralized signal routing, supporting multiple video inputs—including component, Y/C, and composite—along with selectable audio inputs. The manual offers exhaustive technical documentation, detailing electrical specifications, I2C bus control mechanisms, built-in filtering options (LPF), and physical integration requirements. This product is designed for professional engineers developing complex consumer electronic devices that require reliable, high-fidelity video and audio signal switching.
Page 1 Text Content
Structure : Silicon Monolithic Integrated Circuit
Product name : Wide Bandwidth Audio-Video SW for TV
Type : BH7645KS2
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 7) I2C-BUS control 8) Optional Slave address modifications(90H/92H) 9) I2C-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 m W
VIDEO PART, LOGIC PART VIN1 0 ～ Vcc1+0.2 V
Input voltage range
AUDIO PART VIN2 0 ～ Vcc2+0.2 V
Storage temperature range Tstg -55 ～ +125 ℃ *1 When mounting on a 70mm×70mm×1.6mm PCB board
Reduced by 13m W/℃ 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.
REV. A
Page Summary Contents For ROHM BH7645KS2 Data Sheet
Manual Details
| Brand | ROHM |
|---|---|
| Pages | 5 |
| File Size | 130.00 KB |
| Published | July 10, 2026 |
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Frequently Asked Questions
How many video input types can this switch support?
It supports three main types: 2-inputs component, 2-inputs Y/C, and 2-inputs composite.
What communication modes are supported via the I²C-BUS?
The I²C-BUS is compatible with the fast mode of Version 2.0 but is not compatible with Hi-Speed (Hs) mode.
What are the required operating temperature ranges?
The product operates within a temperature range of -40°C to +85°C.
Is this product reliable enough for critical applications like medical or aerospace equipment?
No. It is not designed for use in systems requiring an extremely high level of reliability, such as medical instruments or aerospace machinery.