Datasheet.kr   

GS4900B 데이터시트 PDF




Gennum에서 제조한 전자 부품 GS4900B은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.


 

PDF 형식의 GS4900B 자료 제공

부품번호 GS4900B 기능
기능 SD Clock and Timing Generator
제조업체 Gennum
로고 Gennum 로고


GS4900B 데이터시트 를 다운로드하여 반도체의 전기적 특성과 매개변수에 대해 알아보세요.




전체 30 페이지수

미리보기를 사용할 수 없습니다

GS4900B 데이터시트, 핀배열, 회로
GS4901B/GS4900B SD Clock and Timing Generator with GENLOCK
Key Features
Video Clock Synthesis
• Pre-programmed for 4 video clock periods (14.32 MHz, 27
MHz, 36 MHz, and 54 MHz)
• Accuracy of free-running clock frequency limited only by
crystal reference
• One differential and two single-ended video clock outputs
• Each clock may be individually delayed for skew control
• Video output clock may be directly connected to Gennum’s
serializers for a SMPTE-compliant SDI output
Audio Clock Synthesis (GS4901B only)
• Three audio clock outputs
• Generates any audio clock up to 512*96kHz
• Pre-programmed for 7 audio clocks
Timing Generation
• Generates up to 8 timing signals at a time
• Choose from 9 pre-programmed timing signals: H and V sync
and blanking, F Sync, F Digital, AFS (GS4901B only), Display
Enable, 10FID, and up to 4 user-defined timing signals
• Pre-programmed to generate timing for 9 different video
formats
Genlock Capability
• Clocks may be free-running or genlocked to an input
reference with a variable offset step size of 100-200ps
(depending on exact clock frequency)
• Variable timing offset step size of 100-200ps up to one frame
• Output may be cross-locked to a different input reference
• Freeze operation on loss of reference
• Optional crash or drift lock on application of reference
• Automatic input format detection
General Features
• Reduces design complexity and saves board space - 9mm x
9mm package plus crystal reference replaces multiple
VCXOs, PLLs and timing generators
• Pb-free and RoHS Compliant
• Low power operation typically 300mW
• 1.8V core and 1.8V or 3.3V I/O power supplies
• 64-PIN QFN package
Applications
• Video cameras; Digital audio and/or video recording/play
back devices; Digital audio and/or video processing devices;
Computer/video displays; DVD/MPEG devices; Digital Set
top boxes; Video projectors; High definition video systems;
Multi-media PC applications
Description
The GS4901B is a highly flexible, digitally controlled clock
synthesis circuit and timing generator with genlock
capability. It can be used to generate video and audio
clocks and timing signals, and allows multiple devices to be
genlocked to an input reference.
The GS4900B includes all the features of the GS4901B, but
does not offer audio clocks or AFS pulse generation.
The GS4901B/GS4900B will recognize input reference
signals conforming to 36 different video standards, and will
genlock the output timing information to the incoming
reference. The GS4901B/GS4900B supports cross-locking,
allowing the output to be genlocked to an incoming
reference that is different from the output video standard
selected.
The user may select to output one of 4 different video
sample clock rates. The chosen clock frequency can be
further divided using internal dividers, and is available on
two video clock outputs and one LVDS video clock output
pair. The video clocks are frequency and phased-locked to
the horizontal timing reference, and can be individually
delayed with respect to the timing outputs for clock skew
control.
Eight user-selectable timing outputs are provided that can
automatically produce the following timing signals for 9
different video formats: HSync, Hblanking, VSync,
Vblanking, F sync, F digital, AFS (GS4901B only), DE, and
10FID. These timing outputs may be locked to the input
reference signal for genlock timing and may be phase
adjusted via internal registers.
In addition, the GS4901B provides three audio sample
clock outputs that can produce audio clocks up to 512fs
with fs ranging from 9.7kHz to 96kHz. Audio to video
phasing is accomplished by an external 10FID input
reference, a 10FID signal specified via internal registers, or
a user-programmed audio frame sequence.
The GS4901B/GS4900B is Pb-free, and the encapsulation
compound does not contain halogenated flame retardant
(RoHS Compliant).
GS4901B/GS4900B SD Clock and Timing Generator
with GENLOCK
Data Sheet
37703 - 4
December 2009
www.gennum.com
1 of 102




GS4900B pdf, 반도체, 판매, 대치품
Contents
Key Features........................................................................................................................................................1
Applications.........................................................................................................................................................1
Description ........................................................................................................................................................... 1
1. Pin Out...............................................................................................................................................................7
1.1 GS4901B Pin Assignment ...............................................................................................................7
1.2 GS4900B Pin Assignment ...............................................................................................................8
1.3 Pin Descriptions ................................................................................................................................9
1.4 Pre-Programmed Recognized Video Standards .................................................................. 19
1.5 Output Timing Signals ................................................................................................................. 23
2. Electrical Characteristics ......................................................................................................................... 27
2.1 Absolute Maximum Ratings ....................................................................................................... 27
2.2 DC Electrical Characteristics ..................................................................................................... 27
2.3 AC Electrical Characteristics ..................................................................................................... 31
2.4 Solder Reflow Profiles .................................................................................................................. 34
3. Detailed Description.................................................................................................................................. 35
3.1 Functional Overview .................................................................................................................... 35
3.2 Modes of Operation ...................................................................................................................... 35
3.2.1 Genlock Mode..................................................................................................................... 35
3.2.2 Free Run Mode ................................................................................................................... 39
3.3 Output Timing Format Selection .............................................................................................. 40
3.4 Input Reference Signals ............................................................................................................... 41
3.4.1 HSYNC, VSYNC, and FSYNC.......................................................................................... 41
3.4.2 10FID ..................................................................................................................................... 42
3.4.3 Automatic Polarity Recognition ................................................................................... 42
3.5 Reference Format Detector ........................................................................................................ 43
3.5.1 Horizontal and Vertical Timing Characteristic Measurements ......................... 43
3.5.2 Input Reference Validity................................................................................................. 44
3.5.3 Behaviour on Loss and Re-acquisition of the Reference Signal......................... 45
3.5.4 Allowable Frequency Drift on the Reference .......................................................... 47
3.6 Genlock ............................................................................................................................................. 47
3.6.1 Adjustable Locking Time................................................................................................. 49
3.6.2 Adjustable Loop Bandwidth .......................................................................................... 49
3.6.3 Locking to Digital Timing from a Deserializer ......................................................... 52
3.7 Clock Synthesis .............................................................................................................................. 52
3.7.1 Video Clock Synthesis...................................................................................................... 52
3.7.2 Audio Clock Synthesis (GS4901B only)...................................................................... 54
3.8 Video Timing Generator .............................................................................................................. 58
3.8.1 10 Field ID Pulse................................................................................................................. 58
3.8.2 Audio Frame Synchronizing Pulse (GS4901B only)............................................... 59
3.8.3 USER_1~4 ............................................................................................................................. 60
3.8.4 TIMING_OUT Pins ............................................................................................................. 62
3.9 Extended Audio Mode for HD Demux using the Gennum Audio Core ...................... 63
GS4901B/GS4900B SD Clock and Timing Generator
with GENLOCK
Data Sheet
37703 - 4
December 2009
4 of 102

4페이지










GS4900B 전자부품, 판매, 대치품
1. Pin Out
1.1 GS4901B Pin Assignment
LOCK_LOST
REF_LOST
VID_PLL_VDD
VID_PLL_GND
XTAL_VDD
X1
X2
XTAL_GND
CORE_GND
ANALOG_VDD
NC
ANALOG_GND
AUD_PLL_GND
AUD_PLL_VDD
10FID
HSYNC
64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49
1 48
2 47
3 46
4 45
5 44
6 43
7 GS4901B 42
8 64-pin QFN 41
9 (Top View) 40
10 39
11 38
12 37
13 36
14 35
15 34
16 33
17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
LVDS/PCLK3_GND
PCLK3
PCLK3
LVDS/PCLK3_VDD
CORE_VDD
TIMING_OUT_8
TIMING_OUT_7
TIMING_OUT_6
TIMING_OUT_5
TIMING_OUT_4
IO_VDD
TIMING_OUT_3
TIMING_OUT_2
TIMING_OUT_1
ASR_SEL0
ASR_SEL1
Ground Pad
(bottom of package)
GS4901B/GS4900B SD Clock and Timing Generator
with GENLOCK
Data Sheet
37703 - 4
December 2009
7 of 102

7페이지


구       성 총 30 페이지수
다운로드[ GS4900B.PDF 데이터시트 ]

당사 플랫폼은 키워드, 제품 이름 또는 부품 번호를 사용하여 검색할 수 있는

포괄적인 데이터시트를 제공합니다.


구매 문의
일반 IC 문의 : 샘플 및 소량 구매
-----------------------------------------------------------------------

IGBT, TR 모듈, SCR 및 다이오드 모듈을 포함한
광범위한 전력 반도체를 판매합니다.

전력 반도체 전문업체

상호 : 아이지 인터내셔날

사이트 방문 :     [ 홈페이지 ]     [ 블로그 1 ]     [ 블로그 2 ]



관련 데이터시트

부품번호상세설명 및 기능제조사
GS4900B

SD Clock and Timing Generator

Gennum
Gennum

DataSheet.kr       |      2020   |     연락처      |     링크모음      |      검색     |      사이트맵