The TW2964 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 1. 0V for digital supply voltage and 3. 3V for I/O and analog power. A single 27MHz crystal is all that needed to decode all analog video standards. The video decoder decodes the base-band analog CVBS into digital 8-bit 4:2:2 YCbCr for output. It consists of analog front-end with input source selection, variable gain amplifier and analog-to-digital converters, Y/C separation circuit, multi-standard color decoder (PAL BGHI, PAL M, PAL N, combination PAL N, NTSC M, NTSC 4. 43) and synchronization circuitry. The Y/C separation is done with high quality adaptive 4H (5-line) comb filter for reduced cross color and cross luminance. The advanced synchronization processing circuitry can produce stable pictures for non-standard signal as well as weak signal.


  • WD1 (960H) and D1 compatible video decoding operation and it is programmable each channel
  • NTSC (M, 4.43) and PAL (B, D, G, H, I, M, N, N combination), PAL (60) support with automatic format detection
  • Software selectable analog inputs allows any of 2 CVBS per one video ADC
  • Built-in analog anti-alias filter
  • Four 10-bit ADCs and analog clamping circuit for CVBS input
  • Fully programmable static gain or automatic gain control for the Y channel
  • Programmable white peak control for CVBS channel
  • 4-H adaptive comb filter Y/C separation
  • PAL delay line for color phase error correction
  • Refer to the datasheet for the full list of features.




Type Title Date
Datasheet PDF 3.73 MB
Price Increase Notice PDF 208 KB
Product Change Notice PDF 74 KB
Product Advisory PDF 363 KB
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Design & Development