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ADV477 데이터시트 PDF




Analog Devices에서 제조한 전자 부품 ADV477은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.


 

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부품번호 ADV477 기능
기능 Power-Down Color Palette RAM-DAC
제조업체 Analog Devices
로고 Analog Devices 로고


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ADV477 데이터시트, 핀배열, 회로
,. ANALOG
LIllIDEVICES
CMOS8,0 MHzMonolithi2c56Word
Power-DowCnolorPaletteRAM-DACs
I ADV4111ADV41I 5
FEATURES
FUNCTIONAL BLOCK DIAGRAM
Persona' System/Z- and VGA- Compatible
80, 88, 50 and 35 MHz PipelinedOp8rltion
ADV4781ADV.71(ADV8)Pin end Functional
Compatible
Power.oown Mode
On-808rdVoltage Reference
AntIlPlrldl Circuit
Anllog Output Comp8mors
ADV4T7:
OTriple 8-8it D/A Converters
211 )C 24 ColorPalette RAM
B15 )( 24Ovlriay Regllt8r8
ADV476:
STriple I-Bit D/A Convlrtlra
O2S8 )( 18 Color p.l8tte RAM
15 )C18 OvertlY Registers
LRS-M3AIRS-170 Compatible Outputs
Sync on In Th Channel.
EProgrammlble Pedl8t8l
T+5 V CMOSMonolithic ConltrUction
E44-Pin PLCCPeckage
ClOCK
1'0
",
'yll(;
iWiic
OLD
au
OPA
COfIIt
I0Il
100
108
OND
DD Of iiD iii NO 1111RIZ
IIOTE: - NAMEII II PAJlENTMiSES DElIO,. ADV477
APPUCA TlONS
High Rl8Olution Color Grephics
CAE/CAD/CAMAppIicationa
Image Pwoc8s8ing
Instrument81lon
LaptOp Comput8f8
De8ktop Publishing
AVAILABLEa.OCK RAtiS
80 MHz
88 MHz
50 MHz
3SMHz
The ADV477 has a 256 x 24 color lookup table with triple I-bit
video D/A converters. The ADV475 bas a 256 x 18 color
lookup table with triple 6-bit video D/A converters. New fca-
tUres on the ADV4771ADV47S include an on-board 1.2 V volt-
IF reference, ana1oBoutput comparators for self diaposUcs and
debugiDg as well as a power-down or sleep mode.
The power-down mode allows the ADV477/ADV475 to be put
into a sleep mode with sipificant reduction in power consump-
tion. This is ideal for laptop computers that may occasionally
require the optional ability to drive an analog RGB monitor,
but whose design is dictated by a desire to minimize power
consumption.
G£NDAL DESCIUPTION
The ADV477 and ADV47S are pin-, functional-, and software-
compatible RAM-DACa desiped specifically for Penonal Sys-
tem/2 (PS/2) compatible color paphics. They are I cIircct pluS-
in uppade for the ADV478 and ADV471. Both suppon the
existiq 6-bit color VGA standard while also allowing for an
upgrade path to I-bit color resolution.
mv II. tndeGuIIof AuJos Dmce.. 18c.
*r-at SJll8ml2,PSf2,VGAIUIIXI GA8ft!tndaaub of IBtemadoaal
a.u- MKUitsCorp.
Options on both parts include a programmable pedestal (0 or
7.S IRE) and use of an external voltagc or tunent reference.
15 overlay registers provide for overlaying cursors, grids,
menus, EGA emulation, etco, at the hardware level. Also sup-
ported is a pixd read mask register and the ability to encode
sync information on all three chanDels.
Thc ADV477/ADV475 generates RS343A compatiblc vidco sig-
nals into a doubly terminated 7S {} load, and RS-170 compatible
video signals into a singly terminated 75 {} load, without requir-
ing extemal buffering.
This information applies to I product under development. Its characteristics and specifications are subject to change without notice.
Analog Devices assumes no obligation regarding future manufac:ture unleN otherwise agreed to in writing.
REV. 0
Information fvrnilhed by Analog Delli", il beliel/ed to be ,"urate and
reliable. Ho_ef. no relponsibility is assumed by Analog Del/ices for its
UN. nor for any infringements of pltents or oth.r rights of third plni..
which mlY resuh from its use. No licens. is granted by implicltion or
otherwise under any patent or patent rights of Analog Del/ices.
OM T8OII1IOIotv Way. P.O. 80.8101. Norwood. MA 020IZ-"0I. U.S.A.
Tel: 1111329-4700 F..: 117/321-8703 Twx: 7'0/""77
Telex:12448'
Cable:ANALOGNOIllWOOOMAU





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CMOS 80 MHz Monolithic 256 x 24(18) Color Palette RAM-DACs

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CMOS 135 MHz True-Color Graphics Triple 8-Bit Video RAM-DAC

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