19-4269; Rev ꢁ; 1ꢁ/ꢁ8
Ultra-Low Capacitance 1:2 VGA
Switch with 15ꢀV ESD
MAX485E
General Description
Features
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).
♦ ±±15kV HBVꢀESVꢁProteoꢂrꢃVrꢃVꢀꢄotPꢃnaalVꢅrꢆotꢇ
TtPmꢂꢃnas
♦ ±G zVHnꢃꢇwꢂꢇoh
♦ LrwV1Ω (olp)VOꢃ-ꢅtsꢂsonꢃetV(ꢅ,VG,VHVEꢂgꢃnas)
♦ LrwV6pFV(olp)VOꢃ-CnpneꢂonꢃetV(ꢅ,VG,VHVEꢂgꢃnas)
♦ LrwVꢅ,VG,VHVE5twV-10psV(olp)
Horizontal and vertical synchronization (HSYNC/VSYNC)
inputs feature level-shifting buffers to support low-volt-
age CMOS or standard TTL-compatible graphics con-
trollers, meeting the VESA requirement of 8mA. DDC,
consisting of SDA_ and SCL_, is a bidirectional active-
level translating switch that reduces capacitive load. The
MAX4885E features high ESD protection to 15ꢀV
Human Body Model (HBM) on all twelve externally rout-
ed terminals. See the Pin Description section. All other
pins are protected to 1ꢁꢀV Human Body Model (HBM).
♦ NtnPVZtPrVꢁrwtPVCrꢃsꢆmpoꢂrꢃV(<V2µA)
♦ UaoPn-Emnaa,V24-ꢁꢂꢃV(4mmVꢄV4mm)VTQFNVꢁne5ngt
The MAX4885E is specified over the extended -4ꢁ°C to
+85°C temperature range, and is available in the
24-pin, 4mm x 4mm TQFN pacꢀage.
Ordering Information
ꢁAꢅT
TꢀBꢁVꢅANGꢀ
ꢁIN-ꢁACKAGꢀ
Applications
MAX4885EETG+
-4ꢁ°C to +85°C
24 TQFN-EP*
Notebooꢀ Computers/Docꢀing Stations
*EP = Exposed pad.
Digital Projectors
+Denotes lead-free pacꢀage/RoHS-compliant pacꢀage.
Computer Monitors
Servers/Storage
KVM Switches
Pin Configuration
Typical Operating Circuit
TOP VIEW
+3.3V
+5.0V
18 17 16 15 14 13
0.1µF
0.1µF
19
12
SCL2
V1
V
L
V
CC
SCL1 20
11 H1
MAX4885E
21
22
23
24
10
9
3
2
2
3
2
2
SDA2
SDA1
GND
R0, B0, G0
H0, V0
R1, G1, B1
SDA1, SCL1
H1, V1
GRAPHICS
CONTROLLER
VGA
PORT
MAX4885E
V
L
SDA0, SCL0
EN
V
8
CC
2
3
2
*EP
SEL
V0
7
DOCKING
STATION
+3.3V
EN
R2, G2, B2
+
1
2
3
4
5
6
DOCKING
STATION
SDA2, SCL2
SEL
GND
TQFN-ꢀꢁ
*EXPOSED PAD. CONNECTED TO GROUND OR LEAVE UNCONNECTED.
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