Rainbow Electronics MAX4885E User Manual

19-4269; Rev 0; 10/08

EVALUATION KIT

AVAILABLE

Ultra-Low Capacitance 1:2 VGA

Switch with ±15kV ESD

General Description

The MAX4885E integrates high-bandwidth analog
switches and level-translating buffers to implement a
complete 1:2 multiplexer for VGA signals. The device
provides switching for RGB, display data channel (DDC).

Horizontal and vertical synchronization (HSYNC/VSYNC)
inputs feature level-shifting buffers to support low-volt­age CMOS or standard TTL-compatible graphics con­trollers, meeting the VESA requirement of ±8mA. DDC,
consisting of SDA_ and SCL_, is a bidirectional active­level translating switch that reduces capacitive load. The
MAX4885E features high ESD protection to ±15kV
Human Body Model (HBM) on all twelve externally rout­ed terminals. See the

Pin Description

section. All other

pins are protected to ±10kV Human Body Model (HBM).

The MAX4885E is specified over the extended -40°C to
+85°C temperature range, and is available in the
24-pin, 4mm x 4mm TQFN package.

Applications

Notebook Computers/Docking Stations

Digital Projectors

Computer Monitors

Servers/Storage

KVM Switches

Features

♦ ±15kV HBM ESD Protection on Externally Routed

Terminals

♦ 1GHz Bandwidth

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

♦ Low 6pF (typ) On-Capacitance (R, G, B Signals)

♦ Low R, G, B Skew -50ps (typ)

♦ Near Zero Power Consumption (< 2µA)

♦ Ultra-Small, 24-Pin (4mm x 4mm) TQFN Package

Ordering Information

PART TEMP RANGE PIN-PACKAGE

MAX4885EETG+ -40°C to +85°C 24 TQFN-EP*

*

EP = Exposed pad.

+

Denotes lead-free package/RoHS-compliant package.

MAX4885E

Pin Configuration

Typical Operating Circuit

TOP VIEW

G1

MAX4885E

R0

G2

B1

B2

12

V1

11

H1

10

GND

V

9

L

V

8

CC

V0

7

B0

G0

H0

+3.3V

0.1µF 0.1µF

3

GRAPHICS

CONTROLLER

DOCKING

STATION

2

2

+3.3V

V

L

R0, B0, G0

H0, V0

SDA0, SCL0

EN

SEL

+5.0V

V

MAX4885E

R1, G1, B1

SDA1, SCL1

R2, G2, B2

SDA2, SCL2

GND

CC

H1, V1

3

2

VGA

PORT

2

2

DOCKING

3

STATION

2

SCL2

SCL1

SDA2

SDA1

SEL

R1

R2

18 17 16 15 14 13

19

20

21

22

EN

23

*EP

24

+

12 3456

SCL0

SDA0

TQFN-EP

*EXPOSED PAD. CONNECTED TO GROUND OR LEAVE UNCONNECTED.

________________________________________________________________

Maxim Integrated Products

1

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.

MAX4885E

Ultra-Low Capacitance 1:2 VGA
Switch with ±15kV ESD

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

CC

, VL.....................................................................-0.3V to +6V

R_, G_, B_, SDA1, SCL1, SDA2, SCL2,

H1, V1, (Note 1) ........................................-0.3V to V

CC

+ 0.3V

H0, V0, SDA0, SCL0, EN, SEL.........................-0.3V to V

L

+ 0.3V

Continuous Current through RGB Switches .....................±30mA

Continuous Current through DDC Switches .....................±30mA

Peak Current through RGB Switches

(pulsed at 1ms, 10% duty cycle)...................................±90mA

Peak Current through DDC Switches (pulsed at 1ms,

10% duty cycle)............................................................±90mA

Continuous Power Dissipation (T

A

= +70°C)

24-Pin TQFN (derate 27.8mW/°C above +70°C) ........2222mW

Junction to Ambient Thermal Resistance (θ

JA

) (Note 2)

24-Pin TQFN..................................................................36°C/W

Junction to Ambient Thermal Resistance (θ

JC

) (Note 2)

24-Pin TQFN....................................................................3°C/W

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

(VCC= +5.0V ±10%, VL= +2V to +5.5V, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at VCC= +5.0V, VL= +3.3V and

T

A

= +25°C.) (Note 3)

PARAMETER

CONDITIONS

EN = V

L

VCC Quiescent Supply Current I

CC

VCC = +5.0V

EN = GND

1µA

EN = V

L

VL Quiescent Supply Current I

VL

VL = +3.3V

EN = GND

1µA

RGB ANALOG SWITCHES

On-Resistance R

ON

VCC = +5.0V, IIN = -10mA, VIN = +0.7V
(Note 4)

6 Ω

On-Resistance Matching ΔR

ON

0 ≤ VIN ≤ 0.7V, IIN = -10mA 0.5 Ω

On-Resistance Flatness

)

0 ≤ VIN ≤ 0.7V, IIN = -10mA 0.5 Ω

Off-Leakage Current I

L(OFF)

VCC = +5.5V, VIN = +0.3V or +5.5V,
V

EN

= 0 or V

L

-1 +1 µA

On-Leakage Current I

L(ON)

VCC = +5.5V, VIN = +0.3V or +5.5V,
V

EN

= V

L

-1 +1 µA

HV BUFFER

Input Voltage Low V

ILHV

0.33 x
V

L

V

Input Voltage High V

IHHV

0.66 x
V

L

V

Input Logic Hysteresis V

HYST

75 mV

Input Leakage Current I

INHV

VCC = +5.5V, VL = +5.5V, V

IN

= 0 or V

L

-1 +1 µA

High-Output Drive Current I

OHHV

V

OHHV

≥ 3.0V 8.0 mA

Low-Output Drive Current I

OLHV

V

OLHV

≤ 0.6V 8.0 mA

Note 1: Signals exceeding VCCor GND are clamped by internal diodes. Limit forward-diode current to maximum current rating.
Note 2: Package thermal resistances were obtained using the method described in JEDEC specifications. For detailed information

on package thermal considerations, refer to www.maxim-ic.com/thermal-tutorial

.

SYMBOL

MIN TYP MAX UNITS

R

FLAT(ON

MAX4885E

Ultra-Low Capacitance 1:2 VGA

Switch with ±15kV ESD

_______________________________________________________________________________________ 3

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

SDA_, SCL_

Supply Voltage V

L

2.0 5.5 V

On-Resistance R

ON

VIN = +0.4V, IIN = ±2mA, VL = +2.0V 10 Ω

On-Capacitance C

ON

f = 100kHz 15 pF

High-Impedance Input Leakage
Current

I

INHIZ

EN = GND, V

CC

= +5.5V, VL = +3.6V,
SCL0, SDA0, SCL1, SCL2, SDA1, SDA2
= GND or V

VL

(Note 5)

-1 +1 µA

Off-Input Leakage Current I

INOFF

EN = VL, VL = +3.6V, V

IN

= VL - 0.2V -1 +1 µA

CONTROL LOGIC (SEL, EN)

Input Voltage Low V

ILLOG

0.33 x
V

L

V

Input Voltage High

0.66 x
V

L

V

Input Logic Hysteresis V

HYST

75 mV

Input Leakage Current I

INLEK

VCC = +5.5V, VL = +3.6V, V

IN

= 0 or V

L

-1 +1 µA

ESD PROTECTION

Human Body Model; R1, G1, B1, R2, G2,
B2, SDA1, SCL1, SDA2, SCL2, H1, V1

ESD Protection

Human Body Model; all other pins

kV

ELECTRICAL CHARACTERISTICS (continued)

(VCC= +5.0V ±10%, VL= +2V to +5.5V, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at VCC= +5.0V, VL= +3.3V and

T

A

= +25°C.) (Note 3)

PARAMETER

CONDITIONS

Bandwidth f

MAX

RS = RL = 50Ω 1GHz

Insertion Loss I

LOS

f = 1MHz, RS = RL = 50Ω, Figure 1 0.6 dB

Crosstalk V

CT

f = 50MHz, RS = RL = 50Ω, Figure 1 -40 dB

Off-Capacitance C

OFF

f = 250MHz 4.5 pF

On-Capacitance C

ON

f = 250MHz 6.4 pF

AC ELECTRICAL CHARACTERISTICS

(VCC= +5.0V ±10%, VL= +2V to +5.5V, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at VCC= +5.0V, VL= +3.3V and

T

A

= +25°C.) (Note 3)

V

IHLOG

±15

±10

SYMBOL

MIN TYP MAX UNITS