18
58. XTAL IN
Crystal oscillator input
1.57V
59. XTAL OUT
Crystal oscillator output
1.76V
60. RESET
Reset
0V
61. VddP
Digital supply to periphrery 3.3V
62. AV1
AV input from video
switching IC (+3.3 V)
0.06V
63. AV2
AV input from video
switching IC (+3.3 V) input
0.6V
64. IRIN
IR Input
4.8V
11B. IC-BU4052:- 16 Pin IC. This IC is used for video switching
The HEF 4052B is a dual
four channel analog Multiplexer / De- Multiplexer with common channel; select Logic. Each
Multiplexer / De-Multiplexer has four independents inputs / out puts. (Yo to Y
3
) and a
common input / out put (Z) . The Common Channel Select Logic includes two address inputs
(A0 and A1) and an active low enable input INH. Both Multiplexer / De Multiplexer has four bi
directional analog switches, each with one side connected to an independent input / out put. .
( Yo to Y
3
) and the other side connected to common input / out put ( Z).
For operation as a
digital multiplexer / demultiplexer VEE is connected to VSS (typically ground).
Application Information :
•
Analog Multiplexing and De-Multiplexing.
•
Digital Multiplexing and demultiplexing.
•
Signal
Gating
PINNING: HEF 4052BP
Pin no. Pin Description
Voltage in Volts
( 1 Khz Colour Pattern)
1. Y0B
(independent inputs/ Out
puts)
0.50V
2. Y2B Y2/ out B (independent inputs
/ out puts)
0.50V
