THS7353 datasheet(10/51 Pages) TI

No de pièce	THS7353

Description	3-Channel Low Power Video Buffer with I2C Control, Selectable Filters, External Gain Control, 2:1 Input MUX, and Selectable Input Modes

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Fabricant	TI [Texas Instruments]

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PIN CONFIGURATION

CH. 1 - GAIN ADJ.

CH. 2 - INPUT A

CH. 1 - OUTPUT

CH. 1 - INPUT A

NC

CH. 2 - OUTPUT

CH. 3 - INPUT A

CH. 3 - OUTPUT

CH. 2 - INPUT B

CH. 2 - GAIN ADJ.

CH. 1 - INPUT B

CH. 3 - GAIN ADJ.

CH. 3 - INPUT B

I2C-SCL

I2C-A1

I2C-SDA

I2C-A0

V

S+

GND

THS7353

SLOS484 – NOVEMBER 2005

THS7353PW

TSSOP (20-Pin)

(Top View)

A.

NC indicates there is no internal connection to these pins. It is recommended, but not required, to connect these pins

to GND.

TERMINAL FUNCTIONS

TERMINAL

DESCRIPTION

NAME

NO.

N/C

1, 20

No Internal Connection. It is recommended, but not required, to connect these pins to GND

CH. 1 – INPUT A

2

Video Input Channel 1. Input A

CH. 2 – INPUT A

3

Video Input Channel 2. Input A

CH. 3 – INPUT A

4

Video Input Channel 3. Input A

CH. 1 – INPUT B

5

Video Input Channel 1. Input B

CH. 2 – INPUT B

6

Video Input Channel 2. Input B

CH. 3 – INPUT B

7

Video Input Channel 3. Input B

I2C-A1

8

I2C Slave Address Control Bit A1. Connect to Vs+ for a logic 1 preset value or GND for a logic 0 preset value.

I2C-A0

9

I2C Slave Address Control Bit A0. Connect to Vs+ for a logic 1 preset value or GND for a logic 0 preset value.

GND

10

Ground reference pin for all internal circuitry

Vs+

11

Positive Power Supply Input Pin. Connect to 2.7 V to 5 V

Serial data line of the I2C bus. Pull-up resistor should have a minimum value = 2-k

Ω and a maximum value =

SDA

12

19-k

Ω. Pull up to Vs+

I2C bus clock line. Pull-up resistor should have a minimum value = 2-k

Ω and a maximum value = 19-kΩ. Pull

SCL

13

up to Vs+

Channel 3 gain adjustment pin. Short to CH. 3 - OUTPUT pin for 0-dB gain. Or add external resistors and/or

CH. 3 - GAIN ADJ.

14

capacitors to analog ground for signal gain.

CH. 3 – OUTPUT

15

Video output channel 3 from either CH. 3 – INPUT A or CH. 3 – INPUT B

Channel 2 gain adjustment pin. Short to CH. 2 - OUTPUT pin for 0-dB gain. Or add external resistors and/or

CH. 2 - GAIN ADJ.

16

capacitors to analog ground for signal gain.

CH. 2 – OUTPUT

17

Video output channel 2 from either CH. 2 – INPUT A or CH. 2 – INPUT B

Channel 1 gain adjustment pin. Short to CH. 1 - OUTPUT pin for 0-dB gain. Or add external resistors and/or

CH. 1 - GAIN ADJ.

18

capacitors to analog ground for signal gain.

CH. 1 – OUTPUT

19

Video output channel 1 from either CH. 1 – INPUT A or CH. 1 – INPUT B

10

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