TW2968-LA1-CR

TW2968-LA1-CR is an 8-channel WD1 (960H)/D1 compatible video decoder and audio codec. The TW2968 is a low-power NTSC/PAL video decoder chip that is designed for video surveillance applications. It consumes very low power in a typical composite input application. The available power-down mode further reduces the power consumption. It uses the 1V for digital supply voltage and 3.3V for I/O and analogue power. A single 27MHz crystal is all that needed to decode all analogue video standards. The analogue front-end prepares and digitizes the AC coupled analogue signal for further processing. Each channel has built-in anti-aliasing filter and 10-bit over-sampling ADCs. The sync processor of TW2968 detects horizontal synchronization and vertical synchronization signals in the composite video or in the Y signal of an S-video or component signal. The colour demodulation of NTSC and PAL signal is done by first quadrature down mixing and then lowpass filtering.

• NTSC (M, 4.43) and PAL (B, D, G, H, I, M, N, N), PAL (60) support with automatic format detection
• Built-in analogue anti-alias filter and programmable white peak control for CVBS channel
• Eight 10-bit ADCs and analogue clamping circuit for CVBS input
• Fully programmable static gain or automatic gain control for the Y channel
• 4-H adaptive comb filter Y/C separation and PAL delay line for colour phase error correction
• Image enhancement with peaking and CTI and digital sub-carrier PLL for accurate colour decoding
• Digital horizontal PLL for synchronization processing and pixel sampling
• Ten integrated audio ADCs processing and 1 audio DAC and provides multi-ch audio mixed analogue O/P
• Two-wire MPU serial bus interface, low power consumption, power save and power down mode
• 128 lead LQFP package

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