MAX6922/MAX6932/ 27-, 28-, and 32-Output, 76V, MAX6933/MAX6934 Serial-Interfaced VFD Tube Drivers General Description Features The MAX6922/MAX6932/MAX6933/MAX6934 multi-out- 5MHz Industry-Standard 4-Wire Serial Interface put, 76V, vacuum-fluorescent display (VFD) tube driv- 3V to 5.5V Logic Supply Range ers that interface a VFD tube to a microcontroller or a 8V to 76V Grid/Anode Supply Range VFD controller, such as the MAX6850MAX6853. The -1 1V to 0V Filament Bias Supply MAX6922/MAX6934 have 32 outputs, while the MAX6932 (MAX6932/MAX6933/MAX6934 Only) has 27 outputs, and the MAX6933 has 28 outputs. All devices are also suitable for driving telecom relays. Push-Pull CMOS High-V oltage Outputs Data is input using standard 4-wire serial interface Outputs can Source 40mA, Sink 4mA Continuously (CLOCK, DATA, LOAD, BLANK) compatible with other Outputs can Source 75mA Repetitive Pulses VFD drivers and controllers. Outputs can Be Paralleled for Higher Current Drive For easy display control, the active-high BLANK input Any Output can Be Used as a Grid or an Anode forces all driver outputs low, turning the display off, and Driver automatically puts the IC into shutdown mode. Display intensity may also be controlled by directly pulse-width BLANK Input Simplifies PWM Intensity Control modulating the BLANK input. -40C to +125C Temperature Range as Standard The MAX6922/MAX6932/MAX6934 have a serial inter- face data output, DOUT, allowing any number of devices Ordering Information to be cascaded on the same serial interface. PART TEMP RANGE PIN-PACKAGE The MAX6932/MAX6933/MAX6934 have a negative sup- ply voltage input, V , allowing the drivers output swing SS MAX6922AQH -40C to +125C 44 PLCC to be made bipolar to simplify filament biasing in many MAX6932AAX -40C to +125C 36 SSOP applications. MAX6933AAX -40C to +125C 36 SSOP The MAX6922 is available in a 44-pin PLCC package, the MAX6934AQH -40C to +125C 44 PLCC MAX6932 and MAX6933 are available in 36-pin SSOP packages, and the MAX6934 is available in 44-pin PLCC MAX6934ATH -40C to +125C 44 TQFN-EP* and TQFN packages. *EP = Exposed pad. Maxim also offers a 12-output VFD driver (MAX6920) and 20-output VFD drivers (MAX6921/MAX6931). Typical Operating Circuit Applications +5V +60V White Goods Security C2 C1 100nF 100nF Gaming Machines Telecom 38 39 Avionics VFD Modules V V CC BB Instrumentation Industrial Control C Industrial Weighing MAX6934 37 32 VFDOUT DIN Selector Guide OUT0OUT31 17 VFCLK CLK BIPOLAR 18 NO. OF DOUT FOR VFLOAD LOAD PART OUTPUT OUTPUTS CASCADING 15 SWING VFBLANK BLANK V GND SS MAX6922 32 No Yes 12 16 -7V MAX6932 27 Yes Yes C3 MAX6933 28 Yes No THIN QFN 100nF MAX6934 32 Yes Yes Pin Configurations appear at end of data sheet. 19-3224 Rev 3 7/14 VFD TUBEMAX6922/MAX6932/ 27-, 28-, and 32-Output, 76V, MAX6933/MAX6934 Serial-Interfaced VFD Tube Drivers Absolute Maximum Ratings (Voltage with respect to GND.) OUT Sink Current ............................................................15mA V ........................................................................-0.3V to +80V CLK, DIN, LOAD, BLANK, DOUT Current ......................10mA BB V ..........................................................................-0.3V to +6V Continuous Power Dissipation (T = +70C) CC A V (MAX6932/MAX6933/MAX6934 only) ...........-12V to +0.3V 36-Pin SSOP (derate 11.8mW/C SS V - V (MAX6932/MAX6933/MAX6934 only) ...-0.3V to +80V over +70C) .................................................................941mW BB SS OUT (MAX6922 only) ................(GND - -0.3V) to (V + 0.3V) 44-Pin Thin QFN (derate 27mW/C BB OUT (MAX6932/MAX6933/MAX6934 only) over +70C) ...............................................................2165mW ...................................................... (V - -0.3V) to (V + 0.3V) 44-Pin PLCC (derate 13.3mW/C SS BB All Other Pins ........................................... -0.3V to (V + 0.3V) over +70C) ...............................................................1067mW CC OUT Continuous Source Current ...................................-45mA Operating Temperature Range OUT Pulsed (1ms max, 1/4 max duty) Source Current ....-80mA (T to T ) ............................................. -40C to +125C MIN MAX Total OUT Continuous Source Current ........................-840mA Junction Temperature ......................................................+150C Total OUT Continuous Sink Current ..............................140mA Storage Temperature Range ............................ -65C to +150C Total OUT Pulsed (1ms max, 1/4 max duty) Lead Temperature (soldering, 10s) .................................+300C Source Current ...........................................................-960mA Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation 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 (Typical Operating Circuit, V = 8V to 76V, V = 3V to 5.5V, V = -11V to 0V, V - V 76V, T = T to T , unless other- BB CC SS BB SS A MIN MAX wise noted.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Logic Supply Voltage V 3 5.5 V CC Tube Supply Voltage V 8 76 V BB Bias Supply Voltage (MAX6932/ V -11 0 V SS MAX6933/MAX6934 Only) Total Supply Voltage (MAX6932/ V - V 76 V BB SS MAX6933/MAX6934 Only) T = +25C 81 105 All outputs OUT low, A CLK = idle T = -40C to +125C 125 A Logic Supply Operating Current I A CC T = +25C 813 950 All outputs OUT high, A CLK = idle T = -40C to +125C 1000 A T = +25C 2.0 2.5 A All outputs OUT low T = -40C to +125C 3 A Tube Supply Operating Current I mA BB T = +25C 1.3 1.75 A All outputs OUT high T = -40C to +125C 2.0 A T = +25C -1 -0.65 A All outputs OUT low Bias Supply Operating Current T = -40C to +125C -1.2 A (MAX6932/MAX6933/MAX6934 I mA SS T = +25C -1.7 -1.5 Only) A All outputs OUT high T = -40C to +125C -1.8 A T = +25C V - 1.1 A BB V 15V, BB T = -40C to +85C V - 2 A BB I = -25mA OUT T = -40C to +125C V - 2.5 A BB T = -40C to +85C V - 3.5 V 15V, A BB BB High-Voltage OUT V V H I = -40mA OUT T = -40C to +125C V - 4.0 A BB T = +25C V - 1.2 A BB 8V < V < 15V, BB T = -40C to +85C V - 2.5 A BB I = -25mA OUT T = -40C to +125C V - 3.0 A BB Maxim Integrated 2 www.maximintegrated.com