Rainbow-electronics MAX4885 Bedienungsanleitung PDF herunterladen

General Description

The MAX4885 integrates high-bandwidth analog

switches and level-translating buffers to implement a

complete 1:2 or 2:1 multiplexer for VGA signals. The

device provides switching for RGB, display data chan-

nel (DDC), and horizontal and vertical synchronization

(HSYNC, VSYNC) signals. A low-noise charge pump

with internal capacitors provides a boosted gate-drive

voltage to improve performance of the RGB switches.

In the 1:2 multiplexer mode, HSYNC/VSYNC inputs fea-

ture level-shifting buffers to support low-voltage CMOS

or standard TTL-compatible graphics controllers. In the

2:1 multiplexer mode, the output buffers for the

HSYNC/VSYNC inputs are disabled, allowing bidirec-

tional signaling. In both modes, DDC signals are volt-

age-clamped to an external voltage to provide level

translation and protection. The MAX4885 features a

5µA shutdown mode and is ESD protected to ±8kV

Human Body Model (HBM) on externally routed pins.

The MAX4885 is specified over the extended (-40°C to

+85°C) temperature range, and is available in the 32-

pin, 5mm x 5mm TQFN package.

Applications

Notebook Computers

Digital Projectors

Computer Monitors

Servers

KVM Switches

Features

♦ +5V Single-Supply Operation

♦ Programmable Voltage Clamp for Open-Drain

DDC Signals

♦ Low 5Ω (typ) On-Resistance (R, G, B Signals)

♦ Low 13pF (typ) On-Capacitance (R, G, B Signals)

♦ Break-Before-Make Switching Protects Against

Circuit Shorts

♦ ±8kV HBM ESD Protection on Externally Routed

Pins

♦ Low 300µA Supply Current (Lower than 1µA with

Charge Pump Disabled)

♦ Space-Saving, Lead-Free, 32-Pin (5mm x 5mm)

TQFN Package

MAX4885

Complete VGA 1:2 or 2:1 Multiplexer

________________________________________________________________ Maxim Integrated Products 1

19-0554; Rev 0; 5/06

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.

MAX4885

TQFN

TOP VIEW

DDCA0

V+

GND

DDCA1

4567

2324 22 20 19 18

GND

V+

DDCB2

DDCA2

GND

V+

SEL

DDCB1

DDCB0

*EXPOSED PADDLE CONNECTED TO GND

*EP

Pin Configuration

Ordering Information

GRAPHICS

CONTROLLER

V+

GND

+3.3V

+5V

SEL

R0, B0, G0

H0, V0

DDCA0, DDCB0

0.1µF

VGA

PORT 1

VGA

PORT 2

R2, G2, B2

H2, V2

DDCA2, DDCB2

R1, G1, B1

H1, V1

DDCA1, DDCB1

DOCKING

STATION

MAX4885

Typical Operating Circuit

PART

TEMP RANGE

PIN-PACKAGE

PKG

CODE

MAX4885ETJ+

-40°C to +85°C

32 TQFN-EP*

T3255-4

*EP = Exposed pad.

+Denotes lead-free package.

1 2 3 4 5 6 ... 12 13

Inhaltsverzeichnis

Seite 1 - +Denotes lead-free package

General DescriptionThe MAX4885 integrates high-bandwidth analogswitches and level-translating buffers to implement acomplete 1:2 or 2:1 multiplexer fo

Seite 2 - ELECTRICAL CHARACTERISTICS

MAX4885Complete VGA 1:2 or 2:1 Multiplexer10 ______________________________________________________________________________________standard VGA signal

Seite 3 - AC ELECTRICAL CHARACTERISTICS

MAX4885Complete VGA 1:2 or 2:1 Multiplexer______________________________________________________________________________________ 112:1 MultiplexerIn 2

Seite 4 - TIMING CHARACTERISTICS

MAX4885Complete VGA 1:2 or 2:1 Multiplexer12 ______________________________________________________________________________________R1G1B1R2G2B2R0G0B0S

Seite 5 - = +3.3V and T

MAX4885Complete VGA 1:2 or 2:1 MultiplexerMaxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxi

Seite 6

MAX4885Complete VGA 1:2 or 2:1 Multiplexer2 _______________________________________________________________________________________ABSOLUTE MAXIMUM RA

Seite 7 - Figure 3. Charge Injection

MAX4885Complete VGA 1:2 or 2:1 Multiplexer_______________________________________________________________________________________ 3PARAMETERSYMBOLCOND

Seite 8 - Pin Description

MAX4885Complete VGA 1:2 or 2:1 Multiplexer4 _______________________________________________________________________________________PARAMETERSYMBOLCOND

Seite 9 - Pin Description (continued)

MAX4885Complete VGA 1:2 or 2:1 Multiplexer_______________________________________________________________________________________ 5RON vs. VDDAC0*(DDC

Seite 10 - Applications Information

MAX4885Complete VGA 1:2 or 2:1 Multiplexer6 _______________________________________________________________________________________Typical Operating C

Seite 11 - Chip Information

MAX4885Complete VGA 1:2 or 2:1 Multiplexer_______________________________________________________________________________________ 7tr < 5nstf <

Seite 12 - Functional Diagram

MAX4885Complete VGA 1:2 or 2:1 Multiplexer8 _______________________________________________________________________________________Timing Circuits/Tim

Seite 13 - Package Information

MAX4885Complete VGA 1:2 or 2:1 Multiplexer_______________________________________________________________________________________ 9Detailed Descriptio

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Rainbow-electronics MAX4885 Bedienungsanleitung

Stöbern Sie online oder laden Sie Bedienungsanleitung nach Sensoren Rainbow-electronics MAX4885 herunter. Rainbow Electronics MAX4885 User Manual Benutzerhandbuch

Inhaltsverzeichnis

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