MAXIM MAX14886 User Manual

19-5707; Rev 0; 12/10

EVALUATION KIT

AVAILABLE

Dual DisplayPort Graphics Multiplexer

General Description

The MAX14886 high-speed, low-skew, active redriver
multiplexer is ideal for switching between outputs of
dual-graphics systems and signal conditioning to meet
HDMIK v.1.4 compliance up to 2.25Gbps at an external
HDMI connector. It is used for switching between inte­grated (e.g., Intel or AMD) and discrete graphics (e.g.,
NVIDIA or ATI GPU). The device is VESA DisplayPortK
Interoperability Guideline v.1.1a-compliant (requires
external DDC logic) and integrates seamlessly with an
external HDMI connector on the motherboard.

The device accommodates differential inputs as low
as 200mV and drives transition minimized differential
signaling (TMDS®) outputs to 1000mV (typ). A precision
resistor on the output level adjust pin (ADJ) allows differ­entiated output back-termination resistors of 400I (typ)
to better meet HDMI mask jitter compliance, while main­taining full TMDS swing requirements. The device sup­ports AC-(DisplayPort) or DC-(HDMI) coupling directly
to the graphics IC and must be DC-coupled to the HDMI
connector. In addition, the device features current back­flow protection at the HDMI connector and a low-power,
active-high or active-low shutdown mode.

The device operates with a single +3.3V supply, is
specified over the 0NC to +70NC commercial temperature
range, and is available in a 5mm x 5mm, 40-pin TQFN
package.

with HDMI Level Shifter

Features

S Single +3.3V Supply

S Meets HDMI v.1.4 Eye Mask Up to 2.25Gbps

S Meets VESA DisplayPort Interoperability Guideline

v.1.1a (Requires External DDC Logic)

S Low-Power Shutdown Mode

Active High or Active Low

S Output Level Adjust (ADJ) for Output Back-

Termination Without Amplitude Loss

S Seamless Integration into Dual-Graphics Systems

with External HDMI Connector

DC-Coupled HDMI Outputs Mate Directly to

HDMI Connector

AC- or DC-Coupled TMDS-Formatted Inputs

Ordering Information

PART TEMP RANGE PIN-PACKAGE

MAX14886CTL+

+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad.

0NC to +70NC

Typical Operating Circuit

3.3V

40 TQFN-EP*

V

= 3.3V

AVCC

MAX14886

Applications

Dual Graphics Notebook Computers

Dual Mode DisplayPort to HDMI External
Switches or Adapters

HDMI is a trademark of HDMI Licensing, LLC.
DisplayPort is a trademark of Video Electronics Standards

Association (VESA).
TMDS is a registered trademark of Silicon Image, Inc.

_______________________________________________________________ Maxim Integrated Products 1

100nF

A

DisplayPort

100nF

B

DisplayPort

D0AP

D0AN

CKAP

CKAN

D0BP

D0BN

CKBP

CKBN

V

CC

MAX14886

GND

D0CP

D0CN

CKCP

CKCN

SEL

EN1

EN2

ADJ

3.3kΩ

50Ω

HDMI SINK

HDMI CONNECTORMCU

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.

Dual DisplayPort Graphics Multiplexer
with HDMI Level Shifter

ABSOLUTE MAXIMUM RATINGS

(Voltages referenced to GND.)

VCC .......................................................................-0.3V to +4.0V

EN1, EN2, SEL, ADJ ................................ -0.3V to (VCC + 0.3V)

D_CP, D_CN, CKCP, CKCN Short-Circuit

Output Current ............................................................. Q30mA

All Other Pins Short-Circuit Current .................................. Q5mA

Continuous Power Dissipation (TA = +70NC)

TQFN (derate 35.7mW/NC above +70NC) ..................2857mW

Operating Temperature Range ............................. 0NC to +70NC

Storage Temperature Range ............................ -65NC to +150NC

Maximum Junction Temperature .....................................+150NC

Lead Temperature (soldering, 10s) ................................+300NC

Soldering Temperature (reflow) ......................................+260NC

MAX14886

PACKAGE THERMAL CHARACTERISTICS (Note 1)

TQFN

Junction-to-Ambient Thermal Resistance (qJA) ..........45°C/W

Junction-to-Case Thermal Resistance (qJC) .................2°C/W

Note 1: Package thermal resistances were obtained using method described in JEDEC specification JESD51-7, using a four-layer

board. For detailed information on package thermal considerations, refer to www.maxim-ic.com/thermal-tutorial.

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.

ELECTRICAL CHARACTERISTICS

(VCC = +3.3V, TA = 0NC to +70NC, R

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

DC PERFORMANCE

Supply Voltage V
Supply Current I

Total Supply Current I

Shutdown Supply Current I

Single-Ended Input Termination
Resistance

Single-Ended Output Voltage
High

Single-Ended Output Voltage
Low

= 3.3kI, CCL = 100nF, typical values are at TA = +25NC.) (Note 2)

ADJ

CC

CC

GND

SHUT

R

IN

V

OH

V

OL

EN1 = high, EN2 = low

50I termination to AVCC, V
(Note 3)

EN1 = low or EN2 = high

DC 40 60

DC, V

DC, V

= +3.3V (Notes 3, 4)

AVCC

= +3.3V (Notes 3, 4)

AVCC

AVCC

= +3.3V

3 3.6 V

V

AVCC

- 0.01

V

AVCC

- 0.6

52.5 mA

105 mA

100

V

AVCC

+ 0.01

V

AVCC

- 0.45

FA

I

V

V

2

Dual DisplayPort Graphics Multiplexer

with HDMI Level Shifter

ELECTRICAL CHARACTERISTICS (continued)

(VCC = +3.3V, TA = 0NC to +70NC, R

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

AC PERFORMANCE

Differential Input Return Loss SDD11

Input Frequency Range f

Differential Input Range V
Differential Output Voltage V
Output Rise/Fall Time t
Deterministic Jitter t
Random Jitter t
Lane-to-Lane Skew t
Propagation Delay t

CONTROL LOGIC (EN1, EN2, SEL)

Input Logic-Low Voltage V
Input Logic-High Voltage V
Input Logic Hysteresis V
Input Pulldown/Pullup Resistor R
Shutdown Recovery Time t
TMDS Mux Switching Time t

ESD PROTECTION

All Pins Human Body Model ±8 kV

Note 2: All units are production tested at TA = +70NC. Specifications over temperature are guaranteed by design.
Note 3: AVCC is an external supply.
Note 4: Guaranteed by design; not production tested.

= 3.3kI, CCL = 100nF, typical values are at TA = +25NC.) (Note 2)

ADJ

150MHz P f P 1.25GHz

IN

IDIFF

ODIFF

R/F

DJ

RJ

SK

PD

HYST

IPULL

SHUT

MUX

Clock 25 225
Data 225 1125

200 1600 mV
50I single termination
20% to 80%, 2.25Gbps 80 ps
K28.5 pattern, up to 2.25Gbps (Note 4) 0.04 UI
D10.2 pattern, 2.25Gbps (Note 4) 1.1 ps

IL

IH

900 1250 mV

1.4 V

-8 dB

50 ps

250 ps

0.6 V

50 mV

400

20
50 ns

MAX14886

MHz

RMS

kI

Fs

3