Techwell’s TW9903 is a high quality NTSC, PAL, and
SECAM video decoder plus high quality down scaler
designed for multimedia applications.
TW9903 uses the mixed-signal 3.3V CMOS
technology to provide a low-cost and low-power
integrated solution. Minimum external components
are required due to its integrated analog front-end
containing AGC, clamping, and three 8-bit high speed
ADCs. For composite inputs, an adaptive comb filter
and luma/chroma processing produce exceptionally
high quality pictures using proprietary techniques. A
high quality internal scaling engine offers arbitrarily
filtered down scaling of the output picture. A built-in
Closed-Caption decoder and VBI data pass-through
support data applications such Closed-Captioning and
IntercastÔ.
- NTSC (M, 4.34) and PAL (B, D, G, H, I, M, N, N
combination), PAL (60), SECAM with automatic format
detection
- Advanced synchronization processing for VCR fast
forward, backward, and pause mode
- Software selectable analog inputs allows any of the
following combinations:
- Up to four composite video inputs
- Three composite and one S-video inputs
- Two 8-bit ADCs and analog clamping circuit.
- Fully programmable static gain or automatic gain control
for the Y or CVBS channel
- Programmable white peak control for the Y or CVBS
channel
- Video processing
- Switchable Notch or 2H comb filter Y/C separation
- PAL delay line for color phase error correction
- Image enhancement with programmable peaking.
- Digital sub-carrier PLL for accurate color decoding
- Digital Horizontal PLL and advanced synchronization
processing for non-standard video signals
- Programmable hue, brightness, saturation, and contrast.
- Automatic color control and color killer
- High quality horizontal and vertical filtered scaling with
arbitrary scale down ratio
- Detection of level of copy protection according to
Macrovision standard
Video Output
- Programmable output cropping
- VMI 1.4 compatible 8-bit or 16-bit pixel interface
- ITU-R 601 or ITU-R 656 compatible output YCbCr(4:2:2)
output format
- Clos ed caption decoding
- VBI data pass through, raw ADC data for Intercast™
Miscellaneous
- Two wire MPU serial bus interface
- Power-down mode
- Typical power consumption 0.4W
- Single 27MHz crystal for all standards
- Supports 24.54MHz and 29.5MHz crystal for high
resolution square pixel format
- 5V tolerant I/O
- 3.3 V power supply
- 100-pin PQFP package
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深圳斯普仑科技有限公司
Shenzhen Spring Technology Co.,Ltd
地址：深圳市福田区振华路122号海外装饰大厦A座211室
Shenzhen futian district zhenhua road 122 overseas decoration building, room 211, block A, 518031
成先生 13662688167
电话（Tel）：(+86-755) 8352 1389/ 8350 5153
传真（Fax）：(+86-755) 8350 2530
邮箱: szspl5@szspl-ic.com
网址：www.szspl-ic.com/ www.splkj.com/
