ST STMAV340 User Manual

STMAV340

Low ON Resistance Quad, SPDT, Wide-Bandwidth Video Switch

Features

■ Bi-directional operation

■ 4 input/output channels analog video switch

■ Wide bandwidth 300MHz

■ Low 4Ω swit ch resistance betw een two ports

■ Excellent R

■ Minimal propagation delay through the switch

■ Low quiescent current consumption

■ V

■ Zero bounce in flow-through mode

■ Control inputs compatible with TTL level

■ All input/output pins are on the same side

Operating Range: 4.0V to 5.5V

CC

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

matching between channels

ON

TSSOP16

Description

The 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 (R
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 practi cally 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.

ON

) of the

Order Codes

Part Number Temperature Range Package Comments

STMAV340 –40°C to +85°C TSSOP16 STMAV340TTR

Rev . 1

September 2005 1/21

www.st.com

21

STMAV340

Contents

1 Summary Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

1.1 Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2 Pin Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

3 Application Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

3.1 Power Supply Sequencing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

4 Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

5 Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

6 Test Circuit and Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

7 Package Mechanical D ata . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

8 Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

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STMAV340 1 Summary Description

1

2

3

4

N

1

2

3

4

N

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, th e 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 Diagr am

1B

A

A

1B

1C

1C

2B

A

A

A

A

A

A

Flow Control

Flow Control

2B

2C

2C

3B

3B

3C

3C

4B

4B

4C

4C

OE_

OE_
S

S

3/21

2 Pin Configuration STMAV340

1
1

2
2
3
3
4
4

N

1
1

2
2
3
3
4
4

N

2 Pin Configuration

Figure 2. Pin Config uration (Top View )

1

B

B
C

C
B

B
C

C
B

B
C

C
B

B
C

C

1
2

2
3

3
4

4
5

5
6

6
7

7
8

8

16

16
15

15
14

14
13

13
12

12
11

11
10

10

9

9

Table 1. Pin Description

Symbol Type Name and Functions

OE_N IN Bus Switch Enable Note: 1

S IN Select Input
1A ,2A ,3A ,4A IN/OUT Port A; Analog Video I/Os
1B ,2B ,3B ,4B IN/OUT Bus B; Analog Video I/Os

1C, 2C, 3C, 4C IN/OUT Bus C; Analog Vide o I/Os

V

V

CC

CC

OE_

OE_
S

S
1A

1A
2A

2A
3A

3A
4A

4A
GND

GND

V

CC

GND Ground

Note: 1 Tie to V

through a pull-up resistor. The minimum value of the resistor is determined by the

CC

Power supply

current-sinking capability of the driver.

Table 2. Truth Table

OE_N S ON Switch

0 0 1B,2B,3B,4B
0 1 1C,2C,3C,4C
1 X Disabled

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STMAV340 3 Application Diagrams

3 Application Diagrams

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

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.

5/21

4 Maximum Ratings STMAV340

4 Maximum Ratings

Stressing the device above the rating listed in the “A bsolu te Max imum Ratings” table may
cause permanent damage to the device. These are stress ratings only and operation of the
device at these or any other conditions above those indicated in the Operating sections of this
specification is not implied. Exposure to Absolute Maximum Rating conditions for extended
periods may affect device reliability. Refer also to the STMicroelectronics SURE Program and
other relevant quality documents.

Table 3. Absolute Maximum Ratings

T

= 25°C, GND= 0V

A

Symbol Parameter Value Unit

V

I

ICC/I

T

CC

V

S

V

IN

I

IK

OUT

STG

GND

Supply Voltage to Ground -0.5 to + 7.0 V
DC Switch Vo lt age -0.5 to + 7.0 V
DC Input Voltage -0.5 to + 7.0 V
DC Input Diode Current -50 mA
DC Output Sink Current 128 mA
DC VCC/GND Current
St orage Temper ature Range -65 to 150 °C

±100 mA

Note: Absolute maximum ratings are those values above which damage to the device may occur.

Functional operation under these conditions is not implied. All voltages are referenced to GND.

6/21

STMAV340 5 Electrical Char acteristics

5 Electrical Characteristics

Table 4. Recommended Operating Conditions

= -20 to +70°C

T

A

Symbol Parameter (Note: 1) T est Conditions M in. T yp. Max. Unit

V

V

V

t

Power Supply Vol tage

CC

Input Voltage

IN

Output Voltage

OUT

Input Rise and Fall Ti m e Switch Control Inpu t 0 5 ns/V

r, tf

4.0 5.5 V

05.5V

05.5V

Switch I/O 0 DC ns/V

Free Air Operating Temperature

V

T

A

ESD-Human Body Model (HMB) Note: 1

ESD

-40 +85 °C

-2 +2 kV

Note: 1 Unused control inputs must be held HIGH or LOW. They should not float.

2 In accordance with IEC61000-4-2, level 4

Table 5. DC Electrical Characteristics

= -40°C to +85°C

T

A

V

Symbol Parameter Test Conditions

Analog Signal Range 5 0 2.0 V

V
V

V

I

OFF

Clamp Diode Voltage IIN = -18mA 4.5 -1.2 V

IK

HIGH Level Input Voltage 4.0-5.5 2.0 V

IH

LOW Level Input Voltage 4.0-5.5 0.8 V

IL

Input Leakage Curr ent 0 ≤ V

I

I

OFF-STATE Leakage

≤ 5.5V 5.5 ±10 μA

IN

0 ≤ A, B ≤ VCC, C ≤ V

CC

Current

VIN = 1.0V, ION = 13mA 4.5 3 7 Ω

= 2.0V, ION = 26mA 4.5 7 10 Ω

V

IN
IN = VCC

Other inputs at V

or GND, I

CC

OUT

or GN D

ΔI

R

ON

Switch ON resist ance (1)

I

Quiescent Supply Current V

CC

CC

Increase in I

CC

per Input One input at 3.4V

= 0 5.5 3 μA

(V)

CC

Min. Typ. Max. Unit

5.5 ±10 μA

5.5 2.5 mA

Note: 1 Measured by the voltage drop between pin A and B/C pins at the indicated current through the

switch. ON Resistance is determined by the lower of the voltages on the two (A or B/ C) pins.

7/21