MAX4885ETJ+T Datasheet MAX4885ETJ+, MAX4885ETJ+T | P1-P3

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

EVALUATION KIT

AVAILABLE

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.

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim's website at www.maxim-ic.com.

MAX4885

Complete VGA 1:2 or 2:1 Multiplexer

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional

operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to

absolute maximum rating conditions for extended periods may affect device reliability.

(All voltages referenced to GND.)

, V

.....................................................................-0.3V to +6V

R_, G_, B_, DDCA_, DDCB_, SEL, M,

EN, QP (Note 1) ...........................................-0.3V to V+ + 0.3V

H_, V_ .......................................................................-0.3V to +6V

Continuous Current Through RGB Switches ....................±70mA

Continuous Current Through HV, DDC Switches…..........±50mA

Peak Current Through RGB Switches

(pulsed at 1ms, 10% duty cycle).................................±140mA

Peak Current Through HV, DDC Switches (pulsed at 1ms,

10% duty cycle)..............................................................±100mA

Continuous Power Dissipation (T

= +70°C)

32-Pin TQFN (derate 21.3mW/°C above +70°C) ........1702mW

Operating Temperature Range ...........................-40°C to +85°C

Storage Temperature Range .............................-65°C to +150°C

Junction Temperature......................................................+150°C

Lead Temperature (soldering, 10s) .................................+300°C

ELECTRICAL CHARACTERISTICS

(V+ = +5.0V ±10%, V

= +3.3V ±10%, T

= T

MIN

to T

MAX

, QP = GND, unless otherwise noted. Typical values are at V+ = +5.0V,

= +3.3V and T

= +25°C.)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Supply Voltage Range V+ 4.5 5.5 V

Clamp Voltage Range V

2.7 V+ V

QP = GND 0.3 0.5 mA

Quiescent Supply Current I

V+ = +5.5V

QP = V+ 1 µA

Quiescent Supply Current I

= V+ = +5.5V 1 µA

Shutdown Current I

+SHDN

V+ = +5.5V, all digital inputs to V+ or GND

5µA

Shutdown Current

CLSHDN

= V+ = +5.5V, all digital inputs to V+ or

GND

1µA

RGB ANALOG SWITCHES

QP = GND 5 7.5

On-Resistance R

0V < V

< +2.5V,

= -40mA

QP = V+ 6 10

On-Resistance Matching ΔR

0V < V

< +2.5V, I

= -40mA 0.5 1.5 Ω

On-Resistance Flatness

FLAT

(

)

0V < V

< +2.5V, I

= -40mA

0.02 0.75

Off-Leakage Current I

L(OFF)

R_, G_, B_ = 0V or +5.5V, EN = GND -1 +1 µA

On-Leakage Current I

L(ON)

R_, G_, B_ = 0V or +5.5V, EN = V+ -1 +1 µA

QP = GND 10

Charge Injection Q

R_, G_, B_ = 0V,

= 1000pF

QP = V+ 8

HV MULTIPLEXER

Input-Voltage Low V

ILHV

M = GND 0.8 V

Input-Voltage High V

IHHV

M = GND 2.0 V

High-Output Drive Current I

OHHV

OUT

= V

- 0.5V, M = GND -16 mA

Low-Output Drive Current I

OLHV

OUT

= +0.5V, M = GND

+16

On-Resistance R

ONHV

H_ = V_ = +2.5V, I

= -40mA, M = V+ 15 Ω

Charge Injection Q H_, V_ = 0V, M = V+, C

= 1000pF 21 pC

Note 1: Signals exceeding V+ or GND are clamped by internal diodes. Limit forward-diode current to maximum current rating.

MAX4885

Complete VGA 1:2 or 2:1 Multiplexer

_______________________________________________________________________________________ 3

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

DDC MULTIPLEXER

On-Resistance

(

DDC

)

< +0.4V, V

= +3.0V, I

= -20mA 20 Ω

DDC Leakage I

L(DDC)

- 0.4V < V

OUT

< V

, V

= V+ -1 +1 µA

Charge Injection Q DDCA_, DDCB_ = 0V, C

= 1000pF 10 pC

SWITCH LOGIC (SEL, M, EN, QP)

Input-Low Voltage V

V+ = +5.5V 0.8 V

Input-High Voltage V

V+ = +4.5V 2.0 V

Input Leakage Current I

LEAK

= V+ -1 +1 µA

ESD PROTECTION

Human Body Model, all pins ±2 kV

ESD Protection

Human Body Model, R_, G_, B_, H_, V_,

DDCA_, DDCB_

±8 kV

ELECTRICAL CHARACTERISTICS (continued)

(V+ = +5.0V ±10%, V

= +3.3V ±10%, T

= T

MIN

to T

MAX

, QP = GND, unless otherwise noted. Typical values are at V+ = +5.0V,

= +3.3V and T

= +25°C.)

PARAMETER

SYMBOL

CONDITIONS

MIN TYP MAX

UNITS

QP = GND

350

Bandwidth f

MAX

= R

= 50Ω

QP = V+

350

MHz

QP = GND

0.85

1.2

Insertion Loss I

LOS

1MHz < f < 50MHz,

= R

= 50Ω

QP = V+ 1 1.6

Crosstalk V

1MHz < f < 50MHz, V

= 0.7V

P-P

= R

= 50Ω

-40 dB

Off-Capacitance C

OFF

f = 1MHz,

QP = GND or V+

5pF

QP = GND 13

On-Capacitance C

f = 1 MHz

QP = V+ 17

Charge-Pump Noise V

NQP

= +1.0V, R

= R

= 50Ω 50

200

µV

AC ELECTRICAL CHARACTERISTICS

(V+ = +5.0V ±10%, V

= +3.3V ±10%, T

= T

MIN

to T

MAX

, QP = GND. Typical values are at V+ = +5.0V, V

= +3.3V and T

+25°C, unless otherwise noted.) (Note 2)

P1-P3 P4-P6 P7-P9 P10-P12 P13-P13

MAX4885ETJ+T

Mfr. #:

Buy MAX4885ETJ+T

Manufacturer:

Maxim Integrated

Description:

Video Switch ICs Complete VGA 1:2 or 2:1 MUX

Lifecycle:

New from this manufacturer.

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MAX4885ETJ+T

MAX4885ETJ+T

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