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PDF TW2868 Data sheet ( Hoja de datos )
| Número de pieza | TW2868 | |
| Descripción | 8-Channel Video Decoders and Audio Codecs and Video Encoder | |
| Fabricantes | Intersil | |
| Logotipo |  |
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8-Channel Video Decoders and Audio Codecs and
Video Encoder for Security Applications
TW2868
The TW2868 includes eight high quality
NTSC/PAL/SECAM video decoders that convert
analog composite video signal to digital
component YCbCr data for security applications.
Each channel contains 10-bit ADC and proprietary
clamp and gain controllers and utilizes 4H comb
filter for separating luminance and chrominance
to reduce cross noise artifacts. The TW2868
adopts image enhancement techniques, such as
IF compensation filter, CTI and programmable
peaking. TW2868 also includes one NTSC/PAL
video encoder with two 10-bit DAC‟s to support
CVBS and YC output. The TW2868 also includes
audio CODEC, which has ten audio Analog-to-
Digital converter processing and one Digital-to-
Analog converter. A built-in audio controller can
generate digital outputs for recording/mixing and
it also accepts digital input for playback.
Features
Accepts all NTSC(M/4.43) /
PAL(B/D/G/H/I/K/L/M/N/60)/SECAM
standards with auto detection
Integrated eight video analog anti-aliasing
filters and 10 bit CMOS ADCs
High performance adaptive 4H comb filters for
all NTSC/PAL standards
IF compensation filter for improvement of color
demodulation
Color Transient Improvement (CTI)
Automatic white peak control
Programmable hue, saturation, contrast,
brightness and sharpness
Proprietary fast video locking system
Supports ITU-R BT.656 type time multiplexed
output with 54/108MHz
Provides simultaneous 2x four channel Full D1
with 108MHz and 2x CIF with 54MHz by time-
multiplexed output format
Integrated ten audio ADC processing and one
audio DAC
Provides multi-channel audio mixed analog
output
Supports I2S/DSP Master/Slave interface for
record output and playback input
PCM 8/16-bit and µ-Law/A-Law 8-bit for audio
word length
Programmable audio sample rate, which covers
popular frequencies of 8/16/32/44.1/48kHz
Supports two-wire serial host interface
Integrated one video encoder and two10-bit
video CMOS DACs
Integrated clock PLL for 108MHz clock output
Ultra low power consumption (Typical
867.36mW)
128 pin LQFP package
May 22, 2013
FN7796.3
1
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 2011-2013. 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.
1 page  
Audio
AIN1
AIN2
AIN3
AIN4
AIN51
AIN5
AIN6
AIN7
AIN8
AIN52
AOUT
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AADDCC
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AADDCC
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DAC Interpolation Filter
ACLKR
ASYNR
ADATR
ADATM
ACLKP
ASYNP
ADATP
ALINKO
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5
5 Page 
Functional Description
Video Input Formats
The TW2868 has build-in automatic standard discrimination circuitry. The circuit uses burst-phase, burst-
frequency and frame rate to identify NTSC, PAL or SECAM color signals. The standards that can be identified
are NTSC (M), NTSC (4.43), PAL (B, D, G, H, I), PAL (M), PAL (N), PAL (60) and SECAM (M). Each standard can
be included or excluded in the standard recognition process by software control. The exceptions are the base
standard NTSC and PAL, which are always enabled. The identified standard is indicated by the Standard
Selection (SDT) register. Automatic standard detection can be overridden by software controlled standard
selection.
TW2868 supports all common video formats as shown in Table 1.
FORMAT
NTSC-M
NTSC-Japan (1)
PAL-B, G, N
PAL-D
PAL-H
PAL-I
PAL-M
PAL-CN
SECAM
PAL-60
NTSC (4.43)
TABLE 1. VIDEO INPUT FORMATS SUPPORTED BY THE TW2868
LINES
FIELDS
FSC
COUNTRY
525
60 3.579545 MHz
U.S., many others
525
60 3.579545 MHz
Japan
625
50 4.433619 MHz
Many
625
50 4.433619 MHz
China
625
50 4.433619 MHz
Belgium
625
50 4.433619 MHz
Great Britain, others
525
60 3.575612 MHz
Brazil
625
50 3.582056 MHz
Argentina
625 50 4.406MHz 4.250MHz France, Eastern Europe, Middle
East, Russia
525
60 4.433619 MHz
China
525
60 4.433619 MHz
Transcoding
Notes: (1). NTSC-Japan has 0 IRE setup.
11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet TW2868.PDF ] | |
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