TMS3471C

2/3 英寸 NTSC 定时器

The is a monolithic integrated circuit designed to supply timing signals for the Texas Instruments 11-mm diagonal TC241 monochrome CCD image sensor. The TMS3471C supplies both CCD drive signals and NTSC television synchronization signals at standard video rates. It requires a single 5-V supply voltage and a 14.318-MHz crystal oscillator input. The TMS3471C provides several options, including multiple antiblooming modes, clamp pulse selection, and delayed horizontal transfer.

The TMS3471C is used in conjunction with level-shifting devices such as the TMS3473B parallel driver and the TI TMS3472A serial driver.

It also supplies sample-and-hold signals for the TI TL1593 three-channel sample-and-hold and multiplex signals for the TI TL1051 video preprocessor. The TMS3471C NTSC synchronization signal outputs include composite sync, composite blank, clamp, subcarrier, subcarrier delayed by 90 degrees, and burst flag.

The TMS3471C is supplied in a 44-pin plastic flat package and is characterized for operation from -20°C

to 45°C.

This device contains circuits to protect its inputs and outputs against damage due to high static voltages or electrostatic fields. These circuits have been qualified to protect this device against electrostatic discharges ESD of up to 2 kV according to MIL-STD-883C, Method 3015; however, precautions should be taken to avoid application of any voltage higher than maximum-rated voltages to these high-impedance circuits. During storage or handling, the device leads should be shorted together or the device should be placed in conductive foam. In a circuit, unused inputs should always be connected to an appropriate logic voltage level, preferably either VCC or ground. Specific guidelines for handling devices of this type are contained in the publication Guidelines for Handling Electrostatic-Discharge-Sensitive ESDS Devices and Assemblies available from Texas Instruments.

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NTSC-Timing Operation

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Solid-State Reliability

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Monochrome Operation

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Eight Selectable Antiblooming Modes

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Surface-Mount Package

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Clamp Pulse-Select Option