MAX4455

更新时间： 2024-09-30 22:55:23

品牌	Logo	应用领域
美信 - MAXIM		/
页数	文件大小	规格书
30页	661K
描述
Arbitrary Graphics On-Screen Display Video Generator

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数据手册

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MAX4455 数据手册

19-2463; Rev 2; 3/03

Arbitrary Graphics On-Screen Display

Video Generator

General Description

Features

The MAX4455 is an eight-channel arbitrary graphics

on-screen display (OSD) video generator that inserts

arbitrary gray-scale bit-mapped graphics into eight

asynchronous composite video sources. Ideal for secu-

rity camera surveillance systems, the MAX4455 sup-

ports the insertion of graphics and text on up to eight

video output channels in 15 levels of brightness. It easi-

ly displays information such as company logo, camera

location, time, and date with arbitrary fonts and sizes.

Arbitrary graphics capability enables the display of

unique languages and fonts, allowing manufacturers to

tailor their system for any geographic market. The

MAX4455 is designed to work with Maxim’s video

crosspoint switches, such as the MAX4356 and

MAX4358, which include circuitry that simplifies the

insertion of the OSD information. The MAX4455 can

also be used with discrete fast mux switches.

ꢀ Generates Arbitrary Graphics Images

ꢀ 15-Level Gray Scale

ꢀ 8 Channels of Bit-Mapped OSD

ꢀ Loss-of-Signal Detector for All Channels

ꢀ Graphics Updatable Within the Vertical Interval

ꢀ Update Time Stamp on All Eight Channels

Simultaneously

ꢀ 3V and 5V Single-Supply Operation

ꢀ Works with MAX4356/MAX4358 Video Crosspoint

Devices and Fast Mux Switches

ꢀ Small 100-Pin TQFP Package (200mm²)

The MAX4455 operates from a 3V to 3.6V digital sup-

ply, and a 2.7V to 5.5V analog supply. Independent

interface supplies enable the MAX4455 to communi-

cate with microprocessors and OSD crosspoint switch

logic with logic levels ranging from 2.7V to 5.5V. The

MAX4455 uses an external 16Mb SDRAM for graphical

image storage for all eight video channels. The

MAX4455 manages all memory interface functions,

allowing a simple host µP interface. The MAX4455’s

multiple-channel memory sharing and multiple-location

write function allow fast memory updates of shared

graphics information necessary for rapidly changing

OSD information, such as a time stamp.

Ordering Information

PART

TEMP RANGE

PIN-PACKAGE

MAX4455ECQ

-40°C to +85°C

100 TQFP

Functional Diagram

DGND

AGND

MAX4455

VIDEO TIMING

EXTRACTION

DIGITAL LINE

BUFFERS

The MAX4455 is available in a thin 100-pin TQFP pack-

age (200mm²area), and is fully specified over the

extended temperature range (-40°C to +85°C). The

MAX4455EVSYS is available to evaluate the MAX4455

along with the MAX4358 (32 × 16 video crosspoint

switch with OSD).

VIDIN0

VIDIN1

VIDIN2

4-BIT D/A

OSDFILL0

OSDFILL1

OSDFILL2

VIDEO TIMING

EXTRACTION

DIGITAL LINE

BUFFERS

VIDEO TIMING

EXTRACTION

DIGITAL LINE

BUFFERS

DAC

CURRENT

REF

Applications

RSET

Security Systems

Video Routing

VIDEO TIMING

EXTRACTION

OSDFILL7

DIGITAL LINE

BUFFERS

4 BIT D/A

VIDIN7

RDY/BSY

OSDKEY0

OSDKEY1

OSDKEY2

AD7–AD0

ADDR/DATA

Industrial Applications

OSD

CONTROL

AND TIMING

CPU

INTERFACE

MEMORY

INTERFACE

OSDKEY7

DQ RAS CAS WE BA CK

XTAL2 XTAL1/SYNC

MEMORY MEMORY

ADDRESS DATA

BUS

Pin Configuration appears at end of data sheet.

________________________________________________________________ Maxim Integrated Products

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

12 3 4 5 6 7...30

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与MAX4455相关器件

型号	品牌	获取价格	描述	数据表
MAX4455ECQ	MAXIM	获取价格	Arbitrary Graphics On-Screen Display Video Generator
MAX4455ECQ+D	MAXIM	获取价格	On-Screen Display IC, CMOS, PQFP100, 14 X 14 MM, 1 MM HEIGHT, TQFP-100
MAX4455ECQ+TD	MAXIM	获取价格	On-Screen Display IC, CMOS, PQFP100, 14 X 14 MM, 1 MM HEIGHT, ROHS COMPLIANT, TQFP-100
MAX4455EVKIT	MAXIM	获取价格	Evaluation Kit/Evaluation System for the MAX4455
MAX4455EVSYS	MAXIM	获取价格	Evaluation Kit/Evaluation System for the MAX4455
MAX4456	MAXIM	获取价格	Low-Cost 4x4, 8x4, 8x8 Video Crosspoint Switches
MAX4456CPL	MAXIM	获取价格	Low-Cost 4x4, 8x4, 8x8 Video Crosspoint Switches
MAX4456CPL+	MAXIM	获取价格	暂无描述
MAX4456CQH	MAXIM	获取价格	Low-Cost 4x4, 8x4, 8x8 Video Crosspoint Switches
MAX4456CQH-D	MAXIM	获取价格	Cross Point Switch, 1 Func, 8 Channel, CMOS, PQCC44, PLASTIC, MO-047AC, LCC-44

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