19-6229 Rev 0 3/12 EVALUATION KIT AVAILABLE MAX14984 Enhanced VGA Port Protector with Monitor Detection and Dual USB Power Switches General Description Benefits and Features The MAX14984 is a complete VGA port protector with dual S Design Flexibility USB power switches. The device features all the circuitry Graphics Controller Port Is Protected when required to detect the insertion and removal of a monitor V = 0V CC and automatically connect the graphics controller when a External Pullup Resistors Match DDC Channel monitor is detected. A switched 5V output provides up to to Graphics Controller Supply 55mA to the VGA port in addition to normal VGA signals. Up to Two USB Ports Supported The MAX14984 features a single active-low enable S High Level of Integration for Performance input to control two 5V USB switches. Each switch sup- S5V Provides +5V at 55mA to VGA Port plies 500mA of current with less than 250mV drop from Internal Pullup Resistors on DDC Outputs to S5V V , and is protected against short-circuit faults. Two Low 6pF (typ) RGB Capacitance CC active-low fault outputs indicate when a fault condition is 2.1ns (typ) t /t with 10pF, 2.2kI Load on R F detected on either output. Monitor-Side SYNC Signals Source and Sink 8mA While Meeting Speed High-bandwidth analog switches exceed VESA rise/fall Requirements time requirements for the RGB channels. The horizontal High-ESD Protection on VGA and USB Outputs and vertical synchronization (H/V) buffers shift logic lev- Q8kV Human Body Model (HBM) els to support +2.5V to +5.0V CMOS or TTL-compatible graphics controllers while meeting the VESA drive capa- S Saves Space on Board bility requirement of Q8mA. An internal 2.5V regulator Internal USB Switches and pullup resistors on the monitor side translate the Pass +5V at 500mA with 250mV (max) DDC voltage levels to be compatible with low-voltage IR Drop graphics controllers. Current Limited/Thermal Protection The MAX14984 features high-ESD protection of Q8kV 4mm x 4mm, 24-Pin TQFN Package Human Body Model (HBM) on all VGA and USB out- puts. The device is available in a 24-pin (4mm x 4mm) Typical Operating Circuit TQFN package and is specified over the -40NC to +85NC extended temperature range. +3.3V +5V Applications 1F Servers Workstations 3 3 V CC Desktop PCs R0, G0, B0 R1, G1, B1 2 2 HSYNC0, HSYNC1, VSYNC0 VSYNC1 VGA GRAPHICS 2 2 PORT SCL0, SDA0 SCL1, SDA1 CONTROLLER 2 Ordering Information appears at end of data sheet. S5V F1, F2 1F ENU +3.3V MAX14984 For related parts and recommended products to use with this part, USB refer to www.maxim-ic.com/MAX14984.related. USB1 DEVICE 1F MD USB USB2 DEVICE 1F ENV GND Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com.MAX14984 Enhanced VGA Port Protector with Monitor Detection and Dual USB Power Switches ABSOLUTE MAXIMUM RATINGS (All voltages referenced to GND.) Continuous Power Dissipation (T = +70C) A V , S5V, H0, V0, SDA0, SCL0, ENU, ENV, SDA1, TQFN (derate 27.8mW/NC above +70C) ................2222.2mW CC SCL1, USB1, USB2, MD, F1, F2 (Note 1) ...........-0.3V to +6V Operating Temperature Range .......................... -40NC to +85NC R0, G0, B0, R1, G1, B1, H1, V1 ..................-0.3V to V + 0.3V Junction Temperature .....................................................+150NC CC Continuous Current Out of USB1, USB2 ..........................500mA Storage Temperature Range ............................ -65NC to +150NC Continuous Current Out of S5V ..........................................60mA Lead Temperature (soldering, 10s) ................................+300NC Continuous Current Through all I/O Pins ........................Q50mA Soldering Temperature (reflow) ......................................+260NC Peak Current Through RGB, DDC Switches (1ms Pulse, 10% Duty Cycle) ....................................Q100mA PACKAGE THERMAL CHARACTERISTICS (Note 2) TQFN Junction-to-Ambient Thermal Resistance (q ) ..........36C/W Junction-to-Case Resistance (q ) ...................................3C/W JA JA Note 1: When F1 and F2 are connected to a voltage higher than V , some current will be sinked (see the Detailed Description). CC Note 2: Package thermal resistances were obtained using the 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 opera- tion 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 (V = 5.0V Q 5%, T = -40NC to +85NC, unless otherwise noted. Typical values are at V = 5.0V and T = +25NC.) (Note 3) CC A CC A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNIT POWER SUPPLY Supply Voltage V 4.75 5.25 V CC V = +5.25V, V = V = 0V, SCL0 and CC ENV ENU 2.3 5 SDA0 not connected Supply Current I mA CC V = +5.25V, V = V = 0V, CC ENV ENU 6.6 10 V = V = 0V SCL0 SDA0 Shutdown Supply Current I V = +5.25V, V = V = V 29 100 FA SHDN CC ENV ENU CC 5-VOLT SWITCH (S5V) Voltage Drop V I = 55mA 135 300 mV S5V OUT Reverse Leakage Current I V = +5.25V, V = 0V, V = 0V 10 FA L S5V CC ENV Current Limit I 55 305 500 mA LIM USB SWITCHES (USB1, USB2) Voltage Drop V I = 500mA 250 mV USB OUT Continuous Load Current I 500 mA LOAD Current-Limit Threshold I 0.5 1.0 A LIM Current-Limit Blanking t (Note 4) 7.5 50 ms BLANK Period Output Rise Time t R = 10I, C = 1FF, 10%90%, Figure 1 11.6 Fs R L L Output Fall Time t R = 10I, C = 1FF, 90%10%, Figure 1 25.2 Fs F L L Turn-On Delay t R = 10I, C = 1FF, to 10% of V , Figure 1 100 Fs ON L L OUT Turn-Off Delay t R = 10I, C = 1FF, to 90% of V , Figure 1 100 Fs OFF L L OUT Reverse Leakage Current I 10 V = 5.25V, V = 0V, V = 0V FA LUSB USB CC ENU Pulldown Resistance 1200 I Maxim Integrated Products 2