
CXA2161R
I
2
C 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 I
2
C 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 75
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 (600
loads possible)
Switchable audio limiter function
Switchable Mono output for RF modulators
Audio output disable
I
2
C and Logic
Fast mode compatible I
2
C 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
Storage temperature
Allowable power dissipation
V
CC
Tstg
14
V
–65 to +150
°C
P
D
1.1
W
(when mounted on the board)
Operating Conditions
Single supply
12 ± 0.6
5 ± 0.25
–5 ± 0.25
5 ± 0.25
12 ± 0.6
–20 to +75
V
V
V
V
V
Dual supply
Operating temperature
Topr
°C
– 1 –
E00202-PS
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.
56 pin LQFP (Plastic)