MAX4885E Maxim, MAX4885E Datasheet

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MAX4885E

Manufacturer Part Number
MAX4885E
Description
The MAX4885E integrates high-bandwidth analog switches and level-translating buffers to implement a complete 1:2 multiplexer for VGA signals
Manufacturer
Maxim
Datasheet

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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-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 ±15kV
Human Body Model (HBM) on all twelve externally rout-
ed 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.
19-4269; Rev 0; 10/08
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.
*EXPOSED PAD. CONNECTED TO GROUND OR LEAVE UNCONNECTED.
TOP VIEW
Notebook Computers/Docking Stations
Digital Projectors
Computer Monitors
Servers/Storage
KVM Switches
SDA2
SDA1
SCL2
SCL1
SEL
EN
19
20
21
22
23
24
+
________________________________________________________________ Maxim Integrated Products
18
1
*EP
17
2
General Description
TQFN-EP
MAX4885E
16
3
Pin Configuration
15
4
14
5
Applications
13
6
Ultra-Low Capacitance 1:2 VGA
12
11
10
9
8
7
V1
H1
GND
V
V
V0
L
CC
Switch with ±15kV ESD
♦ ±15kV HBM ESD Protection on Externally Routed
♦ 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
* EP = Exposed pad.
+ Denotes lead-free package/RoHS-compliant package.
MAX4885EETG+
Terminals
CONTROLLER
GRAPHICS
+3.3V
DOCKING
STATION
PART
+3.3V
0.1µF
3
2
2
Typical Operating Circuit
R0, B0, G0
H0, V0
SDA0, SCL0
EN
SEL
-40°C to +85°C
Ordering Information
TEMP RANGE
V
L
MAX4885E
GND
SDA2, SCL2
SDA1, SCL1
R2, G2, B2
+5.0V
R1, G1, B1
V
CC
H1, V1
PIN-PACKAGE
Features
3
2
2
2
3
2
24 TQFN-EP*
0.1µF
DOCKING
STATION
PORT
VGA
1

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MAX4885E Summary of contents

Page 1

... Human Body Model (HBM) on all twelve externally rout- ed 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. ...

Page 2

... 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 ...

Page 3

ELECTRICAL CHARACTERISTICS (continued +5.0V ±10 +2V to +5.5V +25°C.) (Note 3) A PARAMETER SYMBOL SDA_, SCL_ Supply Voltage On-Resistance On-Capacitance High-Impedance Input Leakage Current Off-Input Leakage Current I CONTROL LOGIC (SEL, ...

Page 4

Ultra-Low Capacitance 1:2 VGA Switch with ±15kV ESD TIMING CHARACTERISTICS (V = +5.0V ±10 +2V to +5.5V +25°C.) (Note 3) A PARAMETER SYMBOL RGB ANALOG SWITCHES Output Skew Between Ports t HV BUFFER ...

Page 5

V = +3.3V and T = +25°C, unless otherwise noted BUFFER OUTPUT VOLTAGE LOW vs. TEMPERATURE 1.0 0.8 0.6 0.4 0.2 0.0 -40 - TEMPERATURE (°C) ON-RESPONSE vs. FREQUENCY 0 -1 ...

Page 6

... SEL CC R0, G0, B0 MAX4885E R1, G1, B1 R2, G2, B2 50Ω GND MEASUREMENTS ARE STANDARDIZED AGAINST SHORTS AT IC TERMINALS. INSERTION-LOSS IS MEASURED BETWEEN R0 AND EACH SWITCH. CROSSTALK IS MEASURED FROM ONE CHANNEL TO THE OTHER CHANNEL. SIGNAL DIRECTION THROUGH SWITCH IS REVERSED; WORST VALUES ARE RECORDED. ...

Page 7

... V because low-voltage clamping is not required, as spec- ified by the VESA standard. Drive EN logic-low to shut down the MAX4885E. In shut- down mode, all switches are high impedance, providing high-signal rejection. The RGB, HSYNC, VSYNC, SDA_, and SCL_ outputs are ESD protected to ±15kV by the Human Body Model ...

Page 8

... ESD performance depends on a variety of conditions. Please contact Maxim for a reliability report document- ing test setup, methodology, and results. The MAX4885E provides the level shifting necessary to drive two standard VGA ports from a graphics con- troller as low as +2.2V. Internal buffers drive the HSYNC and VSYNC signals to VGA standard TTL lev- els ...

Page 9

... H0 V0 _______________________________________________________________________________________ Ultra-Low Capacitance 1:2 VGA Switch with ±15kV ESD I 100% P 90% AMPERES DEVICE 36.8% UNDER TEST 10 Figure 4. HBM Discharge Current Waveform MAX4885E BIDIRECTIONAL LEVEL SHIFTER PEAK-TO-PEAK RINGING I R (NOT DRAWN TO SCALE) TIME CURRENT WAVEFORM Functional Diagram ...

Page 10

... PACKAGE TYPE 24 TQFN-EP Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 10 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © ...

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