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STMAV340-STMAV340TTR
Low on resistance quad, SPDT, wide-bandwidth video switch
September 2005 1/21
Rev. 1
STMAV340Low ON Resistance Quad, SPDT, Wide-Bandwidth Video Switch
Features Bi-directional operation 4 input/output channels analog video switch Wide bandwidth 300MHz Low 4Ω switch resistance between two ports Excellent RON matching between channels Minimal propagation delay through the switch Low quiescent current consumption VCC Operating Range: 4.0V to 5.5V Zero bounce in flow-through mode Control inputs compatible with TTL level All input/output pins are on the same side
facilitates PCB routing Data and control inputs provide the
undershoot clamp diode Guaranteed break-before-make timing High ESD rating: > 2kV HBM –40°C to 85°C operating temperature range Suitable for both RGB and Composite-Video
Switching Available in a small TSSOP16 package
Applications Advanced TVs Front projectors LCD Monitors Notebook PCs DVD Players
Order Codes
DescriptionThe STMAV340 is a bidirectional quad (4
channel), high speed single pole/double throw
(SPDT), low power CMOS TTL-compatible analog
video switch designed for advanced video
applications which demand superior image
quality. The low ON Resistance (RON ) of the
switch allows inputs to be connected to outputs
without adding propagation delay or generating
additional ground bounce noise.
STMAV340 is designed for very low cross-talk,
low bit-to-bit skew, high channel-to-channel noise
isolation, and low I/O capacitance. The switch
offers very little or practically no attenuation of the
high speed signals at the outputs, thus preserving
the signal integrity enough to pass stringent
requirements.
The STMAV340 is able to simplify the PCB routing
on inputs and outputs as well as reduce the
overall BOM costs by eliminating the need for
more costly input-output controllers.
STMAV3402/21
Contents Summary Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31.1 Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Pin Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Application Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53.1 Power Supply Sequencing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Test Circuit and Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Package Mechanical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
STMAV340 1 Summary Description
3/21
1 Summary Description
1.1 Functional Description
The STMAV340 is a high bandwidth, analog video switch. It is low ON-resistance and low I/O
capacitance result in a very small propagation delay.
When OE_N is set to LOW, the select (S) pin connects port A to the selected port B or port C
output. When OE_N is set to HIGH, the switch is OPEN and a high-impedance state exists
between the A port and B/C ports.
Low differential gain and phase make this switch ideal for component and RGB video
applications. This device has high bandwith and low crosstalk, making it ideal for high
frequency applications as well.
Figure 1. Functional Diagram
2 Pin Configuration STMAV340
4/21
2 Pin Configuration
Table 1. Pin Description
Note:1 Tie to VCC through a pull-up resistor. The minimum value of the resistor is determined by the
current-sinking capability of the driver.
Table 2. Truth Table
Figure 2. Pin Configuration (Top View )
STMAV340 3 Application Diagrams
5/21
3 Application Diagrams
3.1 Power Supply Sequencing
Proper power-supply sequencing is advised for all CMOS devices. Applying VCC before
sending any signals to the input/output or control pins is recommended.
Figure 3. STMAV340 2-to-1 Analog Video Switch Used in an LCD TV
Figure 4. STMAV340 1-to-2 Analog Video Switch Used in a PC
