Datasheet > MAX7457

MAX7457

更新时间： 2024-11-24 04:41:43

品牌	Logo	应用领域
美信 - MAXIM		开关连接器
页数	文件大小	规格书
3页	62K
描述
Video Switch for Dual SCART Connectors

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MAX7457 数据手册

Preliminary Data

Video Switch for Dual SCART Connectors

General Description

Features

♦ 4-Channel Video Filter/Buffer for RGB and CVBS

The MAX7457 4-channel video switch is ideal for anti-

aliasing and DAC-smoothing video applications or wher-

ever analog video is reconstructed from a digital data

stream such as cable/satellite/terrestrial set-top boxes

(STBs), DVD players, hard disk recorders (HDRs), and

personal video recorders (PVRs). The MAX7457 filters

and buffers CVBS and RGB video signals, making it

ideal for dual SCART (peritelevision) STBs with an auxil-

lary CVBS input. The MAX7457 operates from a single

+5V supply and has a flat passband out to 5MHz with a

stopband attenuation of 43dB at 27MHz, making it ideal

for NTSC, PAL, and standard-definition digital TV (SDTV)

video systems.

Signals with Auxiliary Input

♦ Allows Auxiliary Input for CVBS Video Loop-

Through Applications

♦ Filter Response Ideal for NTSC, PAL, and

Interlaced SDTV Video Signals

♦ 43dB (typ) Stopband Attenuation at 27MHz

♦ ±0.75dB (max) Passband Ripple Out to 5MHz

♦ Blanking Level Voltage on Cable <1V

♦ Each Channel Drives Two 150Ω Video Loads

♦ +5V Single-Supply Operation

The MAX7457 output buffers have a fixed gain of +6dB

and are capable of driving two standard 150Ω video

loads. The channel for CVBS video has high-frequency

boost circuitry that enhances picture sharpness with up

to +1.2dB of gain boost without degradation in the

stopband. The video output drivers can be disabled by

an external control input.

♦ Available in 5mm x 5mm x 0.8mm, 16-Pin TQFN

Ordering Information

PKG

CODE

The MAX7457 is available in a 16-pin, 5mm x 5mm x

0.8mm TQFN package, and is specified over the

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

PART

TEMP RANGE

PIN-PACKAGE

MAX7457ETE -40°C to +85°C

16 TQFN-EP*

T1655-2

*EP = Exposed pad.

Applications

DVD Players

STBs/HDRs

Pin Configuration appears at end of data sheet.

Game Consoles

Desktop Video Editors

Digital VCRs

Typical Operating Circuit

AUXILIARY VIDEO SOURCE

(VCR, DVD, ETC.)

SELA

0.1µF

75Ω

INA2

INA1

ENCODER

OUTA

OUTB

OUTC

OUTD

2-TO-1

MUX

LOWPASS

FILTER

SYNC

DETECTOR

+6dB

0.1µF

CVBS D/A

INB

INC

IND

LOWPASS

FILTER

D/A

0.1µF

LOWPASS

FILTER

LOWPASS

FILTER

MAX7457

*OPTIONAL CAPACITORS

GND

DISABLE

________________________________________________________________ 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

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与MAX7457相关器件

型号	品牌	获取价格	描述	数据表
MAX7457ETE	MAXIM	获取价格	Video Switch for Dual SCART Connectors
MAX7457ETE+T	MAXIM	获取价格	Audio/Video Switch
MAX745C/D	MAXIM	获取价格	Switch-Mode Lithium-Ion Battery-Charger
MAX745EAP	MAXIM	获取价格	Switch-Mode Lithium-Ion Battery-Charger
MAX745EAP+	MAXIM	获取价格	Power Supply Management Circuit, 1 Channel, PDSO20, SSOP-20
MAX745EAP+T	MAXIM	获取价格	暂无描述
MAX745EAP-T	MAXIM	获取价格	Power Supply Management Circuit, 1 Channel, PDSO20, SSOP-20
MAX745EVKIT	MAXIM	获取价格	Evaluation Kit for the MAX745
MAX746	MAXIM	获取价格	High-Efficiency, PWM, Step-Down, N-Channel DC-DC Controller
MAX7461	MAXIM	获取价格	Loss-of-Sync Alarm

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