DataSheet26.com

SDA9254-2 PDF даташит

Спецификация SDA9254-2 изготовлена ​​​​«Siemens» и имеет функцию, называемую «2.6 MBit Dynamic Sequential Access Memory for Television Applications (TV-SAM) with On-chip Noise Reduction Filter».

Детали детали

Номер произв SDA9254-2
Описание 2.6 MBit Dynamic Sequential Access Memory for Television Applications (TV-SAM) with On-chip Noise Reduction Filter
Производители Siemens
логотип Siemens логотип 

30 Pages
scroll

No Preview Available !

SDA9254-2 Даташит, Описание, Даташиты
2.6 MBit Dynamic Sequential Access Memory
for Television Applications (TV-SAM) with
On-chip Noise Reduction Filter
SDA 9254-2
Preliminary Data
CMOS IC
Features
q Stores a complete video field (4:1:1)
q On chip adaptive recursive noise reduction filter (4:1:1)
q 4 noise reduction classes selectable
q Special noise reduction mode for 4:2:2 applications
q 212 × 64 × 16 × 12-bit organization
q Triple port architecture
q One 16 × 12-bit input shift register
q Two 16 × 12-bit output shift registers
q Shift registers independently and simultaneously
accessible (one output shift register is used internally for
noise reduction filtering)
q Continuous data flow even at maximum speed
q 40-MHz shift rate - 0.96-Gbit/s total data rate
q All inputs and outputs TTL-compatible
q Tristate outputs
q Random access of groups of 16 × 12 bits for a wide range
of applications
q Refresh-free operation possible
q 5 V ± 10 % power supply
q 0 … 70 °C operating temperature range
q Low power dissipation: 700 mW active, 28 mW standby
q Suitable for all common TV standards
q Allows flicker and noise reduction simultaneously
with only one field memory
q Applications: TV, VCR, image processing,
video printers, data compressors, delay lines,
time base correctors, HDTV
P-MQFP-64-1
Type
SDA 9254-2
Ordering Code
on request
Semiconductor Group
1
Package
P-MQFP-64-1
1998-01-16









No Preview Available !

SDA9254-2 Даташит, Описание, Даташиты
SDA 9254-2
Functional Description
General
The SDA 9254-2 is a combination of the TV-SAM SDA 9253 and an adaptive recursive filter to
achieve a reduction of noise for video signals. To get a closed loop one of the two output ports of
the triple port memory is connected internally to the noise reduction filter. External access to this
port is not possible. The characteristic of the noise reduction filter is adjustable via three pins
(CLASS2, CLASS1, CLASS0).
SDC0 ... 11
BLN
NR422
CLASS
12
3
Noise
Reduction
Filter
Port C
12
Field
Memory
Port B Port A
12
SQA0 ... 11
12 UEB10379
Figure 1
Block Diagram
The memory capacity of the SDA 9254-2 enables a field based filtering of 4:1:1 video signals (pin
NR422 = ‘0’). 4:2:2 applications are supported by a special noise reduction mode (pin NR422 = ‘1’).
In this mode filtering is applied only to the luminance signal, the chrominance signals are delayed
by an internal delay line but remain unfiltered. For the storage of 4 bit planes of the chrominance
signal a SDA 9251-2X is requested additionally.
Semiconductor Group
2
1998-01-16









No Preview Available !

SDA9254-2 Даташит, Описание, Даташиты
SDA 9254-2
CLASS
Y
UV
3
8
SDC4...11
4
8 SDC0...3
4
DLI0...3
V DD
NR422
SDA 9254-2
SQA4...11
SQA0...3
DLO0...3
4
4
8
Y
8
UV
SDC0...3
SDA 9251-2X
4
SQA0...3
UEB10380
Figure 2
Noise Reduction with 4:2:2 Signals
Adaptive Field Based Noise Reduction
The reduction of noise is performed by recursive filtering. The filter has the following transfer
function:
H(z) = 1-------------1-------K---K--------×----z------1--
z = ejωTFLD,
TFLD = fielddelay
For K = 1 the transfer function is H(z) = 1, that means no filtering is performed and the input data
remains unchanged. For K < 1 noise reduction filtering is activated. The input data and the delayed
data from the memory are combined according H(z).
Semiconductor Group
3
1998-01-16










Скачать PDF:

[ SDA9254-2.PDF Даташит ]

Номер в каталогеОписаниеПроизводители
SDA9254-22.6 MBit Dynamic Sequential Access Memory for Television Applications (TV-SAM) with On-chip Noise Reduction FilterSiemens
Siemens

Номер в каталоге Описание Производители
TL431

100 мА, регулируемый прецизионный шунтирующий регулятор

Unisonic Technologies
Unisonic Technologies
IRF840

8 А, 500 В, N-канальный МОП-транзистор

Vishay
Vishay
LM317

Линейный стабилизатор напряжения, 1,5 А

STMicroelectronics
STMicroelectronics

DataSheet26.com    |    2020    |

  Контакты    |    Поиск