NOT RECOMMENDED FOR NEW DESIGNS
RECOMMENDED REPLACEMENT PART
TW2837
To request the full datasheet, please visit
www.intersil.com/products/TW2824
4-Channel Video QUAD/MUX Controller for
Security Applications
TW2824
The TW2824 has four high quality NTSC/PAL video
decoders, dual color display controllers and dual
video encoders. The TW2824 contains four 10-bit
analog-to-digital converters, proprietary digital
gain/clamp controller, high quality Y/C separator to
reduce cross-noise and high performance dual
scaler to provide various pictures. Four built-in
motion and blind detectors can increase the feature
of the security system. The TW2824 has a flexible
video display controller including QUAD and MUX
basic functions. The TW2824 also has an excellent
graphic overlay function which displays
character/bitmap, box and mouse pointer. The
TW2824 contains two video encoders with four 10-
bit digital-to-analog converters for providing 2
composite or S-video.
Auto sequence switch with 64 queues and/or
manual switch by interrupt
Various channel attribute control
Image enhancement for still image
High performance 2x zoom for horizontal and
vertical direction
Supports save and recall function
Last image capture when video-loss
Extendable to 8-/12-/16-channel video controller
using cascade connection
Path-to-path cascade
Character/bitmap overlay for OSD
16 programmable single boxes
4 2D arrayed boxes for motion result display
Mouse pointer overlay
Features
Four Video Decoders
Accepts all NTSC/PAL standard formats with
auto detection
Integrated four anti-aliasing filters and 10-bit
CMOS ADCs
High performance adaptive comb filters for all
NTSC/PAL standards
IF compensation filter for improvement of color
demodulation
PAL delay lines for correcting PAL phase errors
Programmable hue, saturation, contrast,
brightness and sharpness
Dual high performance horizontal and vertical
scaler for each channel.
Four built-in motion detectors with 16x12 cells
and blind detectors
Dual Video Encoders
2 path digital outputs with ITU-R BT.656
standards
2 path analog outputs with all analog NTSC/PAL
standards
Supports CVBS or S-video for each path
Programmable bandwidth for luminance and
chrominance path
Four 10-bit video CMOS DACs
Applications
Analog QUAD/MUX system
4-/8-/16-channel DVR system
Car rear vision system
Hair shop system
Dual Video Controllers
Additional 1-channel digital input for playback or
cascade operation
Full live/strobe/switch function
February 2, 2011
1
FN7738.0
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Copyright Intersil Americas LLC. 2011. All Rights Reserved
Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.
All other trademarks mentioned are the property of their respective owners.
TW2824
Block Diagram
ADDRX/BA1X/BA0X/RASBX/CASBX/WENBX/DQMX/DATAX
PBCLK
PBIN
PBVALID
MUX
ITU-R BT656 Decoder
H/V Scaler
ADC
Memory Interface
OSD
Box
Mouse
Overlay
DAC
H/V Scaler
Motion Detect
5x4
Matrix
VIN0A
VIN0B
Color
Decoder
VOUTYX
VOUTCX
VDOUTX
HSENC
VSENC
FLDENC
Write
Control
Read
Control
Video
Encoder
DAC
MUX
VIN1A
VIN1B
H/V Scaler
ADC
ITU-R BT656 Encoder
Color
Decoder
H/V Scaler
Motion Detect
Encoder Timing Interface
MUX
VIN2A
VIN2B
H/V Scaler
ADC
Color
Decoder
H/V Scaler
Motion Detect
Write
Control
Read
Control
ITU-R BT656 Encoder
VDOUTY
VOUTYY
VOUTCY
MUX
VIN3A
VIN3B
HSPB
HCSB0
HCSB1
HALE
HRDB
HWRB
HDAT
H/V Scaler
ADC
Color
Decoder
H/V Scaler
Motion Detect
Memory Interface
OSD
Box
Mouse
Overlay
5x4
Matrix
DAC
Video
Encoder
DAC
HOST Interface
IRQ Interface
Clock Generator
CLK27ENCX
CLK27ENCY
IRQ
ADDRY/BA0Y/RASBY/CASBY/WENBY/DQMY/DATAY
CLK54I
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reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by
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