MAX4998ETI+ Maxim Integrated Products, MAX4998ETI+ Datasheet - Page 9

• Manufacturer Part Number: MAX4998ETI+
• Description: IC DISPLAY PORT MUX 2CH 28-TQFN
• Manufacturer: Maxim Integrated Products
• Series: DisplayPort™r

Specifications of MAX4998ETI+

• Function: Switch
• Circuit: 3 x DPDT, 1 x SPDT
• On-state Resistance: 7 Ohm
• Voltage Supply Source: Single Supply
• Voltage - Supply, Single/dual (±): 3.3V
• Current - Supply: 500µA
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 28-TQFN Exposed Pad
• Number Of Switches: Triple
• Switch Configuration: DPDT
• On Resistance (max): 7 Ohms
• On Time (max): 120 ns
• Off Time (max): 50 ns
• Off Isolation (typ): - 28 dB
• Bandwidth: 5 GHz
• Supply Voltage (max): 3.6 V
• Supply Voltage (min): 3 V
• Supply Current: 850 uA
• Maximum Power Dissipation: 2285 mW
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Insertion Loss: - 0.95 dB
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

NOTE: THE APPLICATION SHOWN IS A TWO-LANE SWITCH BETWEEN THE DOCKING STATION AND DisplayPort CONNECTOR ON A LAPTOP. SEL2 NEEDS TO BE CHANGED FIRST
WHEN SWITCHING SO THAT THE AUX/HPD SIGNAL CAN ESTABLISH CONTACT AND SET PARAMETERS THROUGH DDC. THE HPD SIGNALS FROM THE DOCKING STATION AND DP
CONNECTOR NEED TO BE INPUT THROUGH A LEVEL TRANSLATOR, SUCH AS A 7WZ07 OR 742G07 NONINVERTING TO THE MAX4998. EACH OUTPUT IS PULLED UP TO MATCH THE
LOGIC LEVEL OF THE GMCH. THE COM SIDE OF THE MAX4998 NEEDS TO BE CONNECTED DIRECTLY TO THE GMCH, RUNNING AT LOW VOLTAGE (APPROXIMATELY 1.1V). THIS
ESTABLISHES THE COMMON-MODE VOLTAGE FOR THE SWITCH AND KEEPS THE SWITCH WITHIN ITS OPTIMAL RANGE. IF A FOUR-LANE DisplayPort SWITCH IS DESIRED, THE
MAX14998 SHOULD BE USED. THE CIRCUIT IS THE SAME EXCEPT THAT DP0 TO DP3 IS USED WITH AUX, AND THE HPD CIRCUITRY IS THE SAME.
Two-Lane and Four-Lane DisplayPort Passive
Switches with Separate AUX/HPD Control
GRAPHICS AND MEMORY
_______________________________________________________________________________________
CONTROLLER HUB
V
CC
CHANNEL SELECT
CHANNEL SELECT
= +1.1V
AUX
HPD
DP0
DP1
COM0+
COM0-
COM1+
COM1-
COM2+
COM2-
COM3+
SEL1
SEL2
V
MAX4998
DD
= +3.3V
NO0+
NO1+
NO2+
NO3+
NC0+
NC1+
NC2+
NC3+
NO0-
NO1-
NO2-
NC0-
NC1-
NC2-
7WZ07 DUAL-GATE LOTIC OPERATES FROM +3.3V V
+1.1V
+1.1V
1
2
1
2
10k Ω
OF THE 7WZ07
10k Ω
OF THE 7WZ07
Typical Operating Circuit
AUX1
HPD1
AUX2
HPD2
DP01
DP11
DP02
DP12
DOCKING STATION
CONNECTOR
DisplayPort
CC
9