CXA2161R Datasheet, PDF (1/43 Pages) Sony Corporation – I2C Bus Compatible Audio Video (AV) Switch & Electronic Volume Control

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.
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E00202-PS