CXA2161R 查看數據表（PDF） - Sony Semiconductor

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CXA2161R

I2C Bus Compatible Audio Video (AV) Switch & Electronic Volume Control

Sony Semiconductor 

CXA2161R

I2C Bus Compatible Audio Video (AV) Switch & Electronic Volume Control

Description

The Sony CXA2161R is an Audio/Video switch

designed primarily for application in Digital Set Top

Boxes. It provides video and audio routing from the

digital encoder source to the TV and VCR scart (peri-

television) connectors. In addition, the TV audio

output has a programmable volume control. The chip

is programmed by means of an I2C interface and can

operate from a single or dual power supply.

Target specifications: Canal+, BSkyB, TPS, NorDig,

and ECCA Euro-Box

Features

Supply

• Single: 0V, +5V, +12V

• Dual: 0V, –5V, +5V and +12V

(Low number of external parts required)

Video

• 2 scart switching (VCR, TV)

• VCR input supports RGB mode

• Integrated 75Ω drivers for direct video connection

• Y/C mixer with trap for RF modulators

• Switchable clamps on inputs

• Adjustable gain on RGB outputs

• Video output shutdown for low power modes

• Fast blanking switch

• Slow blanking switch for TV and VCR output

• SVHS switch on VCR output

• Y/C auxiliary input

Audio

• Four stereo audio inputs

• Volume control (–56dB to +6dB in 2dB steps)

• Additional switchable gain on audio DAC inputs

• Audio overlay facility

• Volume bypass for TV and Phono outputs

• Mono switching on TV, VCR outputs

• High drive capability (600Ω loads possible)

• Switchable audio limiter function

• Switchable Mono output for RF modulators

• Audio output disable

56 pin LQFP (Plastic)

I2C and Logic

• Fast mode compatible I2C bus

• Function monitor with loop through

• Interrupt output for function monitor

• Logic output pin

• Sync detector for Y/CVBS inputs

Applications

• Digital Set Top Box

• Integrated digital television

Structure

Bipolar silicon monolithic IC

Absolute Maximum Ratings (Ta = 25°C)

unless stated

• Supply voltage

VCC

14

V

• Storage temperature Tstg –65 to +150 °C

• Allowable power dissipation

PD

1.1

W

(when mounted on the board)

Operating Conditions

• Single supply

12 ± 0.6

V

5 ± 0.25

V

• Dual supply

–5 ± 0.25

V

5 ± 0.25

V

12 ± 0.6

V

• Operating temperature Topr –20 to +75 °C

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–

E00202-PS

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