HV5812 20-Channel Serial-Input Vacuum-Fluorescent Display Driver for Anode/Grid Ordering Information Package Options Device 28 Pin Plastic DIP 28 Pin Plastic Chip Carrier SOW-28 Die HV5812 HV5812P HV5812PJ HV5812WG HV5812X Features General Description ❏ Operating voltage of to up to 80V 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. ❏ HVCMOS technology for high performance ❏ High speed source driver ❏ Up to 3.3MHz data input rate 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. ❏ 5.0V CMOS logic circuitry ❏ Excellent noise immunity ❏ Flexible high voltage supplies Absolute Maximum Ratings1 VDD logic power supply voltage -0.5V to +7.5V VPP positive high voltage supply -0.5V to +90V Logic input voltages -0.3V to VDD +0.3V Operating junction temperature range -40°C to +150°C Storage temperature -55°C to +150°C Power dissipation 28-pin PLCC SOW-28 28-pin DIP 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 = 25°C, unless otherwise noted) Symbol Parameter Min Typ Max Units Conditions -5.0 -15 µA VOUT = 0V, TA = +70°C IDSS Output leakage current HVOH Output voltage 78 78.5 V IOUT = -25mA, VPP = 80V TA = +25°C HVOH Output Voltage 77 78 V IOUT = -25mA, VPP = 80V TA = +125°C HVOL Output Voltage VDD = 5V V IOUT = 1.0mA, TA = +25°C HVOL Output Voltage VDD = 5V ISINK Output pull-down current VDD = 5V 2.0 VIH Logic input voltage VDD = 5V 3.5 VIL Logic input voltage 0.8 V IIH Logic input current VDD = 5V 0.05 0.5 µA VIN = VDD IIL Logic input current VDD = 5V -0.05 -0.5 µA VIN = 0.8V VOH Serial data out VDD = 5V V IOUT = -200µA VOL Serial data out VDD = 5V 200 250 mV IOUT = 200µA fCLK Maximum clock frequency IDDQ IPPQ 1.5 3.0 2.3 4.0 3.5 5.3 -0.3 Supply current 4.5 V mA 4.7 IOUT = 1.0mA, TA = +125°C VOUT = 5.0V to VPP V VDD = 5V 8.0 MHz TJ = +25°C VDD = 5V 5.0 MHz TJ = +125°C VDD = 5V 100 300 µA All outputs high VDD = 5V 100 300 µA All outputs low 10 100 µA Outputs high, no Load 10 100 µA Outputs low, no Load Supply current Recommended Operating Conditions Symbol Parameter Min Nom Max Units VDD Supply voltage 4.5 5.5 V VPP Supply voltage 20 80 V Operating junction temperature -40 +125 °C TJ 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 = 25°C, over operating conditions unless otherwise noted) Symbol Parameter Min Typ Max Units Conditions tPHL Blanking to output delay VDD = 5V 2000 ns CL = 30pF, 50% to 50% tPLH Blanking to output delay VDD = 5V 1000 ns CL = 30pF, 50% to 50% tf Output fall time VDD = 5V 1450 ns CL = 30pF, 90% to 10% tr Output rise time VDD = 5V 650 ns CL = 30pF, 10% to 90% tsu Data set-up time 75 ns See timing diagram th Data hold time 75 ns See timing diagram tpwd Minimum data pulse width 150 ns See timing diagram tpwclk Minimum clock pulse width 150 ns See timing diagram tcks Minimum time between clock activation and strobe 300 ns See timing diagram tpws Minimum strobe pulse width 100 ns See timing diagram tsto Typical time between strobe activation and output transition ns See timing diagram 500 Input and Output Equivalent Circuits VPP VDD VDD L/T Data Out Input GND GND Logic Inputs HVOUT GND Logic Data Output 3 High Voltage Outputs HV5812 Timing Diagram tpwclk CLK 50% 50% tsu Data In tpwd th tpws tcks Strobe Blanking 50% tPHL tsto HV OUT 90% 90% 50% 10% 10% tr tPLH tf Block Diagram Blanking Strobe VPP VDD HVOUT1 HVOUT2 Data In HVOUT3 Clock Data Out 20-bit Shift Register 20-bit Latch HVOUT20 GND Function Table Serial Data Input Clock Input H L to H Shift Register Contents IN Serial Data Output I1 I2 I3 ... IN-1 H R1 R2 ... RN-2 RN-1 RN-1 R1 Strobe Input Latch Content I1 I2 I3 ... IN-1 Blanking IN Output Content I1 I2 I3 ... IN-1 IN L L to H L R2 ... RN-2 RN-1 RN-1 X H to L R1 R2 R3 ... RN-1 RN RN X X ... X X L R1 R2 R3 ... RN-1 RN PN H P1 P2 P3 ... PN-1 PN L P1 P2 P3 ... PN-1 PN X X X ... X H L X P1 P2 Note: L = Low Logic Level X P3 ... PN-1 PN H = High Logic Level X = Irrelevant P= Present State 4 R = Previous State X L L ... L L HV5812 Package Outlines 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 25 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 24 23 22 21 20 26 18 27 17 28 16 1 15 2 14 3 13 4 12 5 6 7 8 9 10 top view 28-pin PLCC 1 28 2 27 3 26 4 25 5 24 6 23 7 22 8 21 9 20 10 19 11 18 12 17 13 16 14 15 top view 28-pin DIP and SOW-28 5 19 11 11/12/01 ©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