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| CALIFORNIA MICRO DEVICES PACVGA201 Pin Diagram VGA PORT COMPANION CIRCUIT Features 7 channels of ESD protection for all VGA port connector pins meeting IEC-61000-4-2 Level-4 ESD requirements (8KV contact discharge) Very low loading capacitance from ESD protection diodes on VIDEO lines, 4pF typical TTL to CMOS level-translating buffers with power down mode for HSYNC and VSYNC lines Three power supplies for design flexibility Compact 16-pin QSOP package 16-PIN QSOP PACKAGE Product Description The PACVGA201 incorporates 7 channels of ESD protection for all signal lines commonly found in a VGA port. ESD protection is implemented with current steering diodes designed to safely handle the high surge currents encountered with IEC-61000-42 Level-4 ESD Protection (8KV contact discharge). When a channel is subjected to an electrostatic discharge, the ESD current pulse is diverted via the protection diodes into the positive supply rail or ground where it may be safely dissipated. Separate positive supply rails are provided for the VIDEO, DDC_OUT and SYNC channels to facilitate interfacing with low voltage video controller ICs and provide design flexibility in multiple-supply-voltage environments. An internal diode (D1, in schematic below) is provided such that VCC2 is derived from VCC3. (VCC2 does not require an external power supply input.) In applications where VCC3 may be powered down, diode D1 blocks any DC current path from the DDC_OUT pins back to the powered down VCC3 rail via the upper ESD protection diodes. Two non-inverting drivers provide buffering for the HSYNC and VSYNC signals from the Video Controller IC (SYNC1, SYNC2). These buffers accept TTL input levels and convert them to CMOS output levels that swing between Ground and VCC3. When the PWR_UP input is driven LOW the SYNC inputs can be floated without causing the SYNC buffers to draw any current from the VCC3 supply. When the PWR_UP input is LOW the SYNC outputs are driven LOW. Schematic Diagram (c) 2000 California Micro Devices Corp. All rights reserved. PAC VGA201 is a trademark of California Micro Devices Corp. 4/00 C0651299 215 Topaz Street, Milpitas, California 95035 Tel: (408) 263-3214 Fax: (408) 263-7846 www.calmicro.com 1 CALIFORNIA MICRO DEVICES ABSOLUTE MAXIMUM RATINGS Parameter VCC1, VCC3 supply voltage D C v o l ta g e a t i n p u ts : V I D E O_ 1 , V I D E O_ 2 , V I D E O_ 3 D D C _ OU T 1 , D D C _ OU T 2 S Y N C_ I N 1 , S Y N C_ I N 2 Temperature: Storage Operating Ambient Package power dissipation -40 to +150 0 to +70 0.75 oC oC PACVGA201 Unit V V V V V Rating GND -0.5, +6.0 GND -0.5, VCC1+0.5 GND -0.5, VCC2+0.5 GND -0.5, VCC3+0.5 W Symbol I CC1 ICC3 VCC2 V IH V IL V OH VOL Rb, Rp IN ELECTRICAL OPERATING CHARACTERISTICS (over operating conditions unless specified other wise) Parameter Conditions MIN V CC1 s u p p l y c u rre n t V CC1 = 5V VCC3 supply current VCC3 = 5V; SYNC inputs at GND or VCC3; PWR_UP pin at VCC3; SYNC outputs unloaded VCC3 = 5V; SYNC inputs at 3.0V; PWR_UP pin at VCC3; SYNC outputs unloaded VCC3 = 5V; PWR_UP input at GND ; SYNC outputs unloaded VCC2 pin open circuit voltage VCC2 voltage internally derived from VCC3 via d i o d e D 1 ; n o e x te rn a l c u rre n t d ra wn ; L o g i c H i g h i n p u t v o l ta g e 1 V CC3 = 5 .0 V 2.0 L o g i c L o w i n p u t v o l ta g e 1 V CC3 = 5 .0 V L o g i c H i g h o u tp u t v o l ta g e 2 IOH = -4mA, VCC3 = 5.0V 4.4 L o g i c L o w o u tp u t v o l ta g e 2 IOL = 4mA, VCC3 = 5.0V R e s i s to r v a l u e PWR_UP, VCC3 = 5.0V 0.5 Input current VID EO inputs HSYNC, VSYNC inputs VCC1 = 5V; VIN = VCC1 or GND VCC3 = 5V; VIN = VCC3 or GND TYP MAX UNIT 10 10 200 10 VCC3-0.8 uA uA uA uA V V V V V M A A pF 0.8 0.4 2 1 1 4.0 4.5 8 8 7 1 CIN Input capacitance 4 VID EO_1, VID EO_2, VID EO_3 tPLH tPHL tr, tf VESD Note 1: Note 2: Note 3: V CC1 = 5 .0 V ; V IN = 2 .5 V ; me a s u re d a t 1 M H z VCC1 = 2.5V; VIN = 1.25V; measured at 1MHz SYNC drivers L-H propagation delay CL = 5 0 p F; V CC3 = 5 V ; I n p u t tr a n d tf < 5 n s SYNC drivers H-L propagation delay CL = 5 0 p F; V CC3 = 5 V ; I n p u t tr a n d tf < 5 n s SYNC drivers output rise & fall times CL = 5 0 p F; V CC3 = 5 V ; I n p u t tr a n d tf < 5 n s ESD withstand voltage3, 4 VCC1 = VCC2 = VCC3 = 5V 12 12 8 ns ns ns kV These parameters apply only to SYNC_IN1, SYNC_IN2 and PWR_UP . These parameters apply only to SYNC_OUT1 and SYNC_OUT2. Per the IEC-61000-4-2 International ESD Standard, Level 4 contact discharge method. VCC1, VCC2 and VCC3 must be bypassed to GND via a low impedance ground plane with a 0.2uF or greater, low inductance, chip ceramic capacitor at each supply pin. ESD pulse is applied between the applicable pins and GND. ESD pulse can be positive or negative with respect to GND. Applicable pins are: VIDEO_1, VIDEO_2, VIDEO_3, SYNC_OUT1, SD1, SYNC_OUT2, SD2, DDC_OUT1 and DDC_OUT2. All other pins are ESD protected to the industry standard 2kV per the Human Body model (MIL-STD-883, Method 3015). This parameter is guaranteed by design and characterization. Note 4: (c)2000 California Micro Devices Corp. All rights reserved. 2 215 Topaz Street, Milpitas, California 95035 Tel: (408) 263-3214 Fax: (408) 263-7846 www.calmicro.com 4/00 CALIFORNIA MICRO DEVICES Typical Connection Diagram PACVGA201 A resistor may be necessary between the VCC2 pin and ground if protection against a stream of ESD pulses is required while the PACVGA201 is in the power-down state. The value of this resistor should be chosen such that the extra charge deposited into the VCC2 bypass capacitor by each ESD pulse will be discharged before the next ESD pulse occurs. The maximum ESD repetition rate specified by the IEC-61000-4-2 standard is one pulse per second. When the PACVGA201 is in the power-up state, an internal discharge resistor is connected to ground via a FET switch for this purpose. For the same reason, VCC1 and VCC3 may also require bypass capacitor discharging resistors to ground if there are no other components in the system to provide a discharge path to ground. Pins 16 STANDARD PART ORDE RING INFORMATION Package Ordering Part Number Style Part Marking QSOP PACVGA201Q When placing an order please specify desired shipping: Tubes or Tape & Reel. (c) 2000 California Micro Devices Corp. All rights reserved. 4/00 215 Topaz Street, Milpitas, California 95035 Tel: (408) 263-3214 Fax: (408) 263-7846 www.calmicro.com 3 |
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