February 1, 2011

1

FN7739.0

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

1-888-INTERSIL or 1-888-468-3774 | Copyright Intersil Americas Inc. 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.

4-Channel Video QUAD/MUX Controller for

Security Applications

TW2834

The TW2834 has four high quality NTSC/PAL video

decoders, dual color display controllers and dual

video encoders. The TW2834 contains four built-in

analog anti-aliasing filters, four 10-bit

analog-to-digital converters, proprietary digital

gain/clamp controller, high quality Y/C separator to

reduce cross-noise and high performance free

scaler. Four built-in motion and blind detectors can

increase the feature of the security system. The

TW2834 has a flexible video display controller

including basic QUAD and MUX functions. The

TW2834 also has an excellent graphic overlay

function that displays character/bitmap for OSD,

single box, 2D array box and mouse pointer. The

built-in channel ID CODEC allows auto decoding and

displaying during playback and the additional scaler

on the playback supports multicropping function of

the same field or frame image. The TW2834

contains two video encoders with four 10-bit

digital-to-analog converters for providing 2

composite or S-video. The TW2834 also can be

extended up to 8-/16-channel video controller using

chip-to-chip cascade connection.

Applications

 Analog QUAD/MUX system

 4-/8-/16-channel DVR system

 Car rear vision system

 Hair shop system

 Dental care system

Features

Four Video Decoders

 Accepts all NTSC/PAL standard formats with

auto detection

 Integrated four analog anti-aliasing filters and

four 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

 High performance horizontal and vertical scaler

for each path including playback input

 Fast video locking system for non-realtime

applications

 Four built-in motion detectors with 16x12 cells

and blind detectors

 Additional digital input for playback with ITU-R

BT.656 standard

 Auto cropping/strobe for playback input with

Channel ID decoder

 Supports 4-channel full D1 record and playback

mode

Dual Video Controllers

 Full live/strobe/switch function

 Various channel attribute control

 Supports pseudo 8-channel or dual page mode

 Horizontal/vertical mirroring for each channel

 Last image capture when video-loss detected

 Auto sequence switch with 128 queues and/or

manual switch by interrupt for record path

 Channel skip in auto sequence switch for record

path when video-loss detected

 Image enhancement for zoomed or still image in

display path

NOT RECOMMENDED FOR NEW DESIGNS

RECOMMENDED REPLACEMENT PART

TW2837

To request the full datasheet, please visit www.intersil.com/products/TW2834