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PDF MAX14984 Data sheet ( Hoja de datos )
| Número de pieza | MAX14984 | |
| Descripción | Enhanced VGA Port Protector | |
| Fabricantes | Maxim Integrated Products | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de MAX14984 (archivo pdf) en la parte inferior de esta página. Total 12 Páginas | ||
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19-6229; Rev 0; 3/12
EVALUATION KIT AVAILABLE
MAX14984
Enhanced VGA Port Protector with Monitor
Detection and Dual USB Power Switches
General Description
The MAX14984 is a complete VGA port protector with dual
USB power switches. The device features all the circuitry
required to detect the insertion and removal of a monitor
and automatically connect the graphics controller when a
monitor is detected. A switched 5V output provides up to
55mA to the VGA port in addition to normal VGA signals.
The MAX14984 features a single active-low enable
input to control two 5V USB switches. Each switch sup-
plies 500mA of current with less than 250mV drop from
VCC, and is protected against short-circuit faults. Two
active-low fault outputs indicate when a fault condition is
detected on either output.
High-bandwidth analog switches exceed VESA rise/fall
time requirements for the RGB channels. The horizontal
and vertical synchronization (H/V) buffers shift logic lev-
els to support +2.5V to +5.0V CMOS or TTL-compatible
graphics controllers while meeting the VESA drive capa-
bility requirement of Q8mA. An internal 2.5V regulator
and pullup resistors on the monitor side translate the
DDC voltage levels to be compatible with low-voltage
graphics controllers.
The MAX14984 features high-ESD protection of Q8kV
Human Body Model (HBM) on all VGA and USB out-
puts. The device is available in a 24-pin (4mm x 4mm)
TQFN package and is specified over the -40NC to +85NC
extended temperature range.
Applications
Servers
Workstations
Desktop PCs
Ordering Information appears at end of data sheet.
For related parts and recommended products to use with this part,
refer to www.maxim-ic.com/MAX14984.related.
Benefits and Features
S Design Flexibility
Graphics Controller Port Is Protected when
VCC = 0V
External Pullup Resistors Match DDC Channel
to Graphics Controller Supply
Up to Two USB Ports Supported
S High Level of Integration for Performance
S5V Provides +5V at 55mA to VGA Port
Internal Pullup Resistors on DDC Outputs to S5V
Low 6pF (typ) RGB Capacitance
2.1ns (typ) tR/tF with 10pF, 2.2kI Load on
Monitor-Side SYNC Signals
Source and Sink 8mA While Meeting Speed
Requirements
High-ESD Protection on VGA and USB Outputs
Q8kV Human Body Model (HBM)
S Saves Space on Board
Internal USB Switches
Pass +5V at 500mA with 250mV (max)
www.DataSheet.co.kr
IR Drop
Current Limited/Thermal Protection
4mm x 4mm, 24-Pin TQFN Package
Typical Operating Circuit
+3.3V
GRAPHICS
CONTROLLER
+5V
1µF
3
2
2
2
+3.3V
R0, G0, B0 VCC R1, G1, B1
HSYNC0,
VSYNC0
HSYNC1,
VSYNC1
SCL0, SDA0 SCL1, SDA1
F1, F2
ENU
S5V
MAX14984
USB1
MD
USB2
ENV GND
3
2
VGA
2 PORT
1µF
USB
1µF DEVICE
USB
1µF DEVICE
����������������������������������������������������������������� 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.
Datasheet pdf - http://www.DataSheet4U.net/
1 page  
MAX14984
Enhanced VGA Port Protector with Monitor
Detection and Dual USB Power Switches
(VCC = +5.0V, TA = +25NC, unless otherwise noted)
DDC ON-RESISTANCE
vs. ANALOG SIGNAL VOLTAGE
50
ISDA0 = 10mA
40
Typical Operating Characteristics
RGB ON-RESISTANCE
vs. ANALOG SIGNAL VOLTAGE
50
IR0 = 10mA
40
30 30
20
TA = +85°C TA = +25°C
10
0
0 0.5 1.0
VSDA0 (V)
TA = -40°C
1.5
2.0
FREQUENCY RESPONSE
0
-1
-2
-3
-4
-5
-6
-7
-8
-9 GO TO G1
-10
1
10 100
FREQUENCY (MHz)
1k
20
TA = +85°C TA = +25°C
10
TA = -40°C
0
012345
VR0 (V)
HSYNC/VSYNC OUTPUT VOLTAGE
vs. TEMPERATURE
5
www.DataSheet.co.kr
ISOURCE/ISINK = 8mA
4
VOH
3
2
1 VOL
0
-40 -15
10
35
60
85
TA (°C)
����������������������������������������������������������������� Maxim Integrated Products 5
Datasheet pdf - http://www.DataSheet4U.net/
5 Page 
MAX14984
Enhanced VGA Port Protector with Monitor
Detection and Dual USB Power Switches
Ordering Information
PART
MAX14984ETG+
TEMP RANGE
-40NC to +85NC
PIN-PACKAGE
24 TQFN-EP*
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed paddle.
Chip Information
PROCESS: BiCMOS
Package Information
For the latest package outline information and land patterns
(footprints), go to www.maxim-ic.com/packages. Note that a
“+”, “#”, or “-” in the package code indicates RoHS status only.
Package drawings may show a different suffix character, but
the drawing pertains to the package regardless of RoHS status.
PACKAGE
TYPE
24 TQFN-EP
PACKAGE
CODE
T2444+3
OUTLINE
NO.
21-0139
LAND
PATTERN NO.
90-0021
www.DataSheet.co.kr
���������������������������������������������������������������� Maxim Integrated Products 11
Datasheet pdf - http://www.DataSheet4U.net/
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet MAX14984.PDF ] | |
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