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| HV5812 20-Channel Serial-Input Vacuum-Fluorescent Display Driver for Anode/Grid Ordering Information Package Options Device HV5812 28 Pin Plastic DIP HV5812P 28 Pin Plastic Chip Carrier HV5812PJ SOW-28 HV5812WG Die HV5812X Features Operating voltage of to up to 80V HVCMOS technology for high performance High speed source driver Up to 3.3MHz data input rate 5.0V CMOS logic circuitry Excellent noise immunity Flexible high voltage supplies General Description The Supertex HV5812 is a 20-channel serial input vacuum fluorescent display driver. It combines a 20-bit CMOS shift register, data latches, and control circuitry with high voltage MOSFET outputs. The HV5812 is primarily designed for vacuum-fluorescent displays. The CMOS shift register and latches allow direct interfacing with microprocessor-based systems. Data input rates are typically over 5.0MHz with 5V logic supply. Especially useful for inter-digit blanking, the BLANKING input disables the output source drives and turns on the sink drivers. Use with TTL may require external pull-up resistors to ensure an input logic high. Absolute Maximum Ratings1 VDD logic power supply voltage VPP positive high voltage supply Logic input voltages Operating junction temperature range Storage temperature Power dissipation 28-pin PLCC SOW-28 28-pin DIP -0.5V to +7.5V -0.5V to +90V -0.3V to VDD +0.3V -40C to +150C -55C to +150C 1.9 Watt 1.7 Watt 2.0 Watt Notes: 1. All voltages are referenced to ground. Absolute maximum ratings are those values at which damage to the device may occur. Functional operation under these conditions is not implied. Continuous operation of the device at the absolute rating level may affect device reliability. 11/12/01 Supertex Inc. does not recommend the use of its products in life support applications and will not knowingly sell its products for use in such applications unless it receives an adequate "products liability indemnification insurance agreement." Supertex does not assume responsibility for use of devices described and limits its liability to the replacement of devices determined to be defective due to workmanship. No responsibility is assumed for possible omissions or inaccuracies. Circuitry and specifications are subject to change without notice. For the latest product specifications, refer to the Supertex website: http://www.supertex.com. For complete liability information on all Supertex products, refer to the most current databook or to the Legal/Disclaimer page on the Supertex website. 1 HV5812 Electrical Characteristics DC Characteristics (Over recommended operating conditions, TA = 25C, unless otherwise noted) Symbol IDSS HVOH HVOH HVOL HVOL ISINK VIH VIL IIH IIL VOH VOL fCLK Parameter Output leakage current Output voltage Output Voltage Output Voltage Output Voltage Output pull-down current Logic input voltage Logic input voltage Logic input current Logic input current Serial data out Serial data out Maximum clock frequency VDD = 5V VDD = 5V VDD = 5V VDD = 5V VDD = 5V VDD = 5V IDDQ IPPQ Supply current VDD = 5V VDD = 5V Supply current 4.5 VDD = 5V VDD = 5V VDD = 5V VDD = 5V 2.0 3.5 -0.3 0.05 -0.05 4.7 200 8.0 5.0 100 100 10 10 300 300 100 100 250 78 77 Min Typ -5.0 78.5 78 1.5 2.3 3.5 5.3 0.8 0.5 -0.5 3.0 4.0 Max -15 Units A V V V V mA V V A A V mV MHz MHz A A A A VIN = VDD VIN = 0.8V IOUT = -200A IOUT = 200A TJ = +25C TJ = +125C All outputs high All outputs low Outputs high, no Load Outputs low, no Load Conditions VOUT = 0V, TA = +70C IOUT = -25mA, VPP = 80V TA = +25C IOUT = -25mA, VPP = 80V TA = +125C IOUT = 1.0mA, TA = +25C IOUT = 1.0mA, TA = +125C VOUT = 5.0V to VPP Recommended Operating Conditions Symbol VDD VPP TJ Supply voltage Supply voltage Operating junction temperature Parameter Min 4.5 20 -40 Nom Max 5.5 80 +125 Units V V C Power-up sequence should be the following: 1. Connect ground. 2. Apply VDD. 3. Set all inputs (Data, CLK, etc.) to a known state. 4. Apply VPP. 5. The VPP should not drop below VDD or float during operation. Power-down sequence should be the reverse of the above. 2 HV5812 AC Characteristics (TA = 25C, over operating conditions unless otherwise noted) Symbol tPHL tPLH tf tr tsu th tpwd tpwclk tcks tpws tsto Parameter Blanking to output delay Blanking to output delay Output fall time Output rise time Data set-up time Data hold time Minimum data pulse width Minimum clock pulse width Minimum time between clock activation and strobe Minimum strobe pulse width Typical time between strobe activation and output transition VDD = 5V VDD = 5V VDD = 5V VDD = 5V 75 75 150 150 300 100 500 Min Typ 2000 1000 1450 650 Max Units ns ns ns ns ns ns ns ns ns ns ns Conditions CL = 30pF, 50% to 50% CL = 30pF, 50% to 50% CL = 30pF, 90% to 10% CL = 30pF, 10% to 90% See timing diagram See timing diagram See timing diagram See timing diagram See timing diagram See timing diagram See timing diagram Input and Output Equivalent Circuits VDD VPP VDD L/T Input Data Out HVOUT GND Logic Inputs GND Logic Data Output GND High Voltage Outputs 3 HV5812 Timing Diagram tpwclk CLK tsu Data In tpwd th tcks tpws 50% 50% Strobe Blanking 50% tPHL tPLH HV OUT tsto 10% tr 90% 90% 50% 10% tf Block Diagram Blanking Strobe VDD VPP HVOUT1 HVOUT2 Data In Clock Data Out 20-bit Shift Register HVOUT3 20-bit Latch HVOUT20 GND Function Table Serial Data Input H L X Clock Input L to H L to H H to L Shift Register Contents I1 H L X I2 R1 R1 X I3 ... IN-1 IN Serial Data Output RN-1 RN-1 RN X PN L H R1 R2 R3 ... RN-1 RN P1 X Note: L = Low Logic Level H = High Logic Level X = Irrelevant P= Present State Strobe Input I1 Latch Content I2 I3 ... IN-1 IN Blanking I1 Output Content I2 I3 ... IN-1 IN R2 ... RN-2 RN-1 R2 ... RN-2 RN-1 R3 ... RN-1 RN X ... X X P3 ... PN-1 PN R1 R2 P1 P2 P2 X P3 ... PN-1 PN X ... X X L H P1 P2 P3 ... PN-1 PN L L L ... L L R = Previous State 4 HV5812 Pin Configuration HV5812 28-pin PLCC, 28-pin DIP, and SOW-28 Pad 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 Function VPP Data Out HVOUT20 HVOUT19 HVOUT18 HVOUT17 HVOUT16 HVOUT15 HVOUT14 HVOUT13 HVOUT12 HVOUT11 Blank GND Clock Strobe HVOUT10 HVOUT9 HVOUT8 HVOUT7 HVOUT6 HVOUT5 HVOUT4 HVOUT3 HVOUT2 HVOUT1 Data In VDD Package Outlines 25 26 27 24 23 22 21 20 19 18 17 16 15 14 13 12 28 1 2 3 4 5 6 7 8 9 10 11 top view 28-pin PLCC 1 2 3 4 5 6 7 8 9 10 11 12 13 14 28 27 26 25 24 23 22 21 20 19 18 17 16 15 top view 28-pin DIP and SOW-28 5 11/12/01 (c)2001 Supertex Inc. All rights reserved. Unauthorized use or reproduction prohibited. 6 1235 Bordeaux Drive, Sunnyvale, CA 94089 TEL: (408) 744-0100 * FAX: (408) 222-4895 www.supertex.com |
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