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max6922/max6932/max6933/max6934 27-, 28-, and 32-output, 76v, serial-interfaced vfd tube drivers ________________________________________________________________ maxim integrated products 1 for pricing delivery, and ordering information please contact maxim/dallas direct! at 1-888-629-4642, or visit maxim? website at www.maxim-ic.com. general description the max6922/max6932/max6933/max6934 multi-out- put, 76v, vacuum-fluorescent display (vfd) tube drivers that interface a vfd tube to a microcontroller or a vfd controller, such as the max6850?ax6853. the max6922/max6934 have 32 outputs, while the max6932 has 27 outputs, and the max6933 has 28 outputs. all devices are also suitable for driving telecom relays. data is input using standard 4-wire serial interface (clock, data, load, blank) compatible with other vfd drivers and controllers. for easy display control, the active-high blank input forces all driver outputs low, turning the display off, and automatically puts the ic into shutdown mode. display intensity may also be controlled by directly pulse-width modulating the blank input. the max6922/max6932/max6934 have a serial inter- face data output, dout, allowing any number of devices to be cascaded on the same serial interface. the max6932/max6933/max6934 have a negative supply voltage input, v ss , allowing the drivers?output swing to be made bipolar to simplify filament biasing in many applications. the max6922 is available in a 44-pin plcc package, the max6932 and max6933 are available in 36-pin ssop packages, and the max6934 is available in 44-pin plcc and tqfn packages. maxim also offers a 12-output vfd driver (max6920) and 20-output vfd drivers (max6921/max6931). applications white goods industrial weighing gaming machines security automotive telecom avionics vfd modules instrumentation industrial control features ? 5mhz industry-standard 4-wire serial interface ? 3v to 5.5v logic supply range ? 8v to 76v grid/anode supply range ? -11v to 0v filament bias supply (max6932/max6933/max6934 only) ? push-pull cmos high-voltage outputs ? outputs can source 40ma, sink 4ma continuously ? outputs can source 75ma repetitive pulses ? outputs can be paralleled for higher current drive ? any output can be used as a grid or an anode driver ? blank input simplifies pwm intensity control ? -40? to +125? temperature range as standard ordering information 19-3224; rev 2; 3/07 part temp range pin- package pkg code max6922 aqh -40? to +125? 44 plcc q44-1 max6932 aax -40? to +125? 36 ssop a36-2 max6933 aax -40? to +125? 36 ssop a36-2 max6934 aqh -40? to +125? 44 plcc q44-1 max6934ath -40? to +125? 44 tqfn-ep* t4477-3 max6934 din clk load blank vfdout vfclk vfload vfblank vfd tube 12 16 thin qfn gnd -7v 37 17 c 18 15 c1 100nf c3 100nf +5v 38 v cc v ss c2 100nf +60v 39 v bb out0?ut31 32 t ypical operating circuit pin configurations appear at end of data sheet. selector guide part no. of outputs bipolar output swing dout for cascading max6922 32 no yes max6932 27 yes yes max6933 28 yes no max6934 32 yes yes * ep = exposed paddle.
max6922/max6932/max6933/max6934 27-, 28-, and 32-output, 76v, serial-interfaced vfd tube drivers 2 _______________________________________________________________________________________ absolute maximum ratings electrical characteristics (typical operating circuit, v bb = 8v to 76v, v cc = 3v to 5.5v, v ss = -11v to 0v, v bb - v ss 76v, t a = t min to t max , unless other- wise noted.) (note 1) stresses beyond those listed under ?bsolute maximum ratings?may cause permanent damage to the device. these are stress rating s only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specificatio ns is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability. (voltage with respect to gnd.) v bb .........................................................................-0.3v to +80v v cc ...........................................................................-0.3v to +6v v ss (max6932/max6933/max6934 only)..............-12v to +0.3v v bb - v ss (max6932/max6933/max6934 only) ....-0.3v to +80v out_ (max6922 only) ..................(gnd - -0.3v) to (v bb + 0.3v) out_ (max6932/max6933/max6934 only) ........................................................(v ss - -0.3v) to (v bb + 0.3v) all other pins..............................................-0.3v to (v cc + 0.3v) out_ continuous source current ....................................-45ma out_ pulsed (1ms max, 1/4 max duty) source current ...-80ma total out_ continuous source current .........................-840ma total out_ continuous sink current ...............................140ma total out_ pulsed (1ms max, 1/4 max duty) source current ...........................................................-960ma out_ sink current .............................................................15ma clk, din, load, blank, dout current .......................?0ma continuous power dissipation (t a = +70?) 36-pin ssop (derate 11.8mw/? over +70?)..................................................................941mw 44-pin thin qfn (derate 27mw/? over +70?)................................................................2165mw 44-pin plcc (derate 13.3mw/? over +70?)................................................................1067mw operating temperature range (t min to t max ) ...............................................-40? to +125? junction temperature ......................................................+150? storage temperature range .............................-65? to +150? lead temperature (soldering, 10s) .................................+300? parameter symbol conditions min typ max units logic supply voltage v cc 3 5.5 v tube supply voltage v bb 876v bias supply voltage (max6932/ max6933/max6934 only) v ss -11 0 v total s up p l y v ol tag e ( m ax 6932/ m ax 6933/m ax 6934 o nl y) v bb - v ss 76 v t a = +25? 81 105 all outputs out_ low, clk = idle t a = -40? to +125? 125 t a = +25? 813 950 logic supply operating current i cc all outputs out_ high, clk = idle t a = -40? to +125? 1000 ? t a = +25? 2.0 2.5 all outputs out_ low t a = -40? to +125? 3 t a = +25? 1.3 1.75 tube supply operating current i bb all outputs out_ high t a = -40? to +125? 2.0 ma t a = +25? -1 -0.65 all outputs out_ low t a = -40? to +125? -1.2 t a = +25? -1.7 -1.5 bias supply operating current ( m ax 6932/m ax 6933/m ax 6934 o nl y) i ss all outputs out_ high t a = -40? to +125? -1.8 ma t a = +25? v bb - 1.1 t a = -40? to +85? v bb - 2 v bb 15v, i out = -25ma t a = -40? to +125? v bb - 2.5 t a = -40? to +85? v bb - 3.5 v bb 15v, i out = -40ma t a = -40? to +125? v bb - 4.0 t a = +25? v bb - 1.2 t a = -40? to +85? v bb - 2.5 high-voltage out_ v h 8v < v bb < 15v, i out = -25ma t a = -40? to +125? v bb - 3.0 v
max6922/max6932/max6933/max6934 27-, 28-, and 32-output, 76v, serial-interfaced vfd tube drivers _______________________________________________________________________________________ 3 electrical characteristics (continued) (typical operating circuit, v bb = 8v to 76v, v cc = 3v to 5.5v, v ss = -11v to 0v, v bb - v ss 76v, t a = t min to t max , unless other- wise noted.) (note 1) parameter symbol conditions min typ max units t a = +25? 0.75 1.2 t a = -40? to +85? 1.5 v bb 15v, i out = 1ma t a = -40? to +125? 2.1 t a = +25? 0.8 1.3 t a = -40? to +85? 1.7 low-voltage out_ ( m ax 6932 o nl y) v l 8v < v bb < 15v, i out = 1ma t a = -40? to +125? 2.2 v t a = +25? v ss + 0.75 v ss + 1.2 t a = -40? to +85? v ss + 1.5 v bb 15v, i out = 1ma t a = -40? to +125? v ss + 2.1 t a = +25? v ss + 0.8 v ss + 1.3 t a = -40? to +85? v ss + 1.7 low-voltage out_ ( m ax 6932/m ax 6933/m ax 6934 o nl y) v l 8v < v bb < 15v, i out = 1ma t a = -40? to +125? v ss + 2.2 v rise time out_ (20% to 80%) t r v bb = 60v, c l = 50pf, r l =2.3k ? 0.9 2.5 ? fall time out_ (80% to 20%) t f v bb = 60v, c l = 50pf, r l =2.3k ? 0.6 1.5 ? serial interface timing characteristics load rising to out_ falling delay (notes 2, 3) 0.9 3 s load rising to out_ rising delay (notes 2, 3) 1.2 3 s blank rising to out_ falling delay (notes 2, 3) 0.9 3 s blank falling to out_ rising delay (notes 2, 3) 1.3 3 s input leakage current clk, din, load, blank i ih , i il 0.05 10 ? logic-high input voltage clk, din, load, blank v ih 0.8 x v cc v logic-low input voltage clk, din, load, blank v il 0.3 x v cc v hysteresis voltage din, clk, load, blank ? v i 0.6 v high-voltage dout v oh i source = -1.0ma v cc - 0.5 v low-voltage dout v ol i sink = 1.0ma 0.5 v
t ypical operating characteristics (v cc = 5.0v, v bb = 76v, and t a = +25?, unless otherwise noted.) max6922/max6932/max6933/max6934 27-, 28-, and 32-output, 76v, serial-interfaced vfd tube drivers 4 _______________________________________________________________________________________ electrical characteristics (continued) (typical operating circuit, v bb = 8v to 76v, v cc = 3v to 5.5v, v ss = -11v to 0v, v bb - v ss 76v, t a = t min to t max , unless other- wise noted.) (note 1) parameter symbol conditions min typ max units 3v to 4.5v 80 130 rise and fall time dout c dout = 10pf (note 2) 4.5v to 5.5v 50 80 ns clk clock period t cp 200 ns clk pulse-width high t ch 90 ns clk pulse-width low t cl 90 ns clk rise to load rise hold t csh (note 2) 100 ns din setup time t ds 5ns 3.0v to 4.5v 20 din hold time t dh 4.5v to 5.5v 15 ns 3.0v to 4.5v 25 120 240 dout propagation delay t do c dout = 10pf 4.5v to 5.5v 20 75 150 ns load pulse high t csw 60 ns note 1: all parameters are tested at t a = +25?. specifications over temperature are guaranteed by design. note 2: guaranteed by design. note 3: delay measured from control edge to when output out_ changes by 1v. tube supply current (i bb ) vs. temperature (outputs low) max6922 toc01 temperature ( c) supply current (ma) 100 80 40 60 020 -20 0 1.2 0.8 0.4 1.6 2.0 2.4 2.8 -40 120 v bb = 8v v bb = 40v v bb = 76v max6922 toc02 temperature ( c) supply current (ma) 100 80 40 60 020 -20 0 0.8 0.6 0.4 0.2 1.0 1.2 1.4 1.6 2.0 1.8 -40 120 v bb = 8v v bb = 40v v bb = 76v tube supply current (i bb ) vs. temperature (outputs high) max6922 toc03 temperature ( c) supply current (ma) 100 80 40 60 020 -20 0 0.4 0.3 0.2 0.1 0.5 0.6 0.7 0.8 1.0 0.9 -40 120 logic supply current (i cc ) vs. temperature (outputs low) v cc = 5v, clk = 5mhz v cc = 3.3v, clk = 5mhz v cc = 5v, clk = idle v cc = 3.3v, clk = idle
max6922/max6932/max6933/max6934 27-, 28-, and 32-output, 76v, serial-interfaced vfd tube drivers _______________________________________________________________________________________ 5 t ypical operating characteristics (continued) (v cc = 5.0v, v bb = 76v, and t a = +25?, unless otherwise noted.) max6922 toc04 temperature ( c) supply current (ma) 100 80 40 60 020 -20 0.6 0.8 0.7 0.9 1.0 1.2 1.1 -40 120 logic supply current (i cc ) vs. temperature (outputs high) v cc = 5v, clk = 5mhz v cc = 3.3v, clk = 5mhz v cc = 5v, clk = idle v cc = 3.3v, clk = idle max6922 toc05 temperature ( c) output voltage (v) 100 80 40 60 020 -20 0 16 14 12 10 8 6 4 2 -40 120 v bb = 8v v bb = 40v v bb = 76v output voltage vs. temperature (outputs low) i out = 4ma max6922 toc06 temperature ( c) output voltage (v) 100 80 40 60 020 -20 0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 -40 120 v bb = 8v v bb = 76v v bb = 40v i out = -40ma output voltage (v bb - v t ) vs. temperature (outputs high) output fall and rise time max6922 toc07 1 s/div blank 2v/div out 20v/div
max6922/max6932/max6933/max6934 27-, 28-, and 32-output, 76v, serial-interfaced vfd tube drivers 6 _______________________________________________________________________________________ pin max6922/ max6934 plcc max6932/ max6933 ssop max6934 tqfn name function 1139 v bb vfd supply voltage 2240 dout (max6932) serial-data output. data is clocked out of the internal shift register to dout on clk? falling edge. for the max6933 only?fd anode and grid driver. 2 (out27) (max6933) (out27 is a push-pull output swinging from v bb to v ss .) 3, 4, 5, 7 17, 19, 20, 25, 26, 27, 30?2 1?1, 13, 14, 19, 20, 21, 24?6, 41, 42, 43 out0 to out31 vfd anode and grid drivers. out_ are push-pull outputs swinging from v bb to gnd for the max6922 and from v bb to v ss for the max6934. 3 ?3, 15, 16, 21?4 out0 to out26 vfd anode and grid drivers. out_ are push-pull outputs swinging from v bb to v ss . 6, 28, 29 22, 23, 44 n.c. no connection. not internally connected. 18 n.c. (v ss ) for the max6922?o connection. not internally connected. for the max6934?ias supply voltage. ?412v ss bias supply voltage 21 17 15 blank blanking input. high forces outputs out_ low without altering the contents of the output latches. low enables outputs out_ to follow the state of the output latches. 22 18 16 gnd ground 23 19 17 clk serial-clock input. data is loaded into the internal shift register on clk? rising edge. on clk? falling edge, data is clocked out of dout. 24 20 18 load load input. data is loaded transparently from the internal shift register to the output latch while load is high. data is latched into the output latch on load's rising edge, and retained while load is low. 43 35 37 din serial-data input. data is loaded into the internal shift register on clk? rising edge. 44 36 38 v cc logic supply voltage ep ep exposed paddle. connect to a large ground plane to maximize thermal performance. pin description
max6922/max6932/max6933/max6934 27-, 28-, and 32-output, 76v, serial-interfaced vfd tube drivers _______________________________________________________________________________________ 7 detailed description the max6922/max6932/max6933/max6934 are vfd tube drivers comprising a 4-wire serial interface driving high-voltage rail-to-rail ? output ports. the driver is suit- able for both static and multiplexed displays. the output ports feature high current-sourcing capabili- ty to drive current into grids and anodes of static or multiplex vfds. the ports also have active current sink- ing for fast discharge of capacitive display electrodes in multiplexing applications. the 4-wire serial interface comprises a shift register and transparent latch with 32 bits for the max6922/ max6934, 28 bits for the max6933, and 27 bits for the max6932. the shift register is written through a clock input clk and a data input din. for the max6922/ max6932/max6934, the data propagates to a data out- put dout. the data output allows multiple drivers to be cascaded and operated together. the output latch is transparent to the shift register outputs when load is high, and latches the current state on the falling edge of load. rail-to-rail is a registered trademark of nippon motorola, ltd. serial-to-parallel shift register latches clk din load blank out0 out1 out2 outn where n = 27 for max6932 28 for max6933 32 for max6922/max6934 dout max6922/max6932/ max6934 only max6922 max6932 max6933 max6934 figure 1. max6922/max6932/max6933/max6934 functional diagram slew-rate control v bb out_ 40 ? typical 750 ? typical slew-rate control v bb v ss out_ 40 ? typical 750 ? typical figure 2. max6922 cmos output driver structure figure 3. max6932/max6933/max6934 cmos output driver structure
max6922/max6932/max6933/max6934 27-, 28-, and 32-output, 76v, serial-interfaced vfd tube drivers 8 _______________________________________________________________________________________ each driver output is a slew-rate controlled cmos push-pull switch driving between v bb and gnd (max6922) or v bb and v ss (max6932/max6933/ max6934). the output rise time is always slower than the output fall time to avoid shoot-through currents dur- ing output transitions. the output slew rates are slow enough to minimize emi, yet are fast enough so as not to impact the typical 100? digit multiplex period and affect the display intensity. initial power-up and operation an internal reset circuit clears the internal registers on power-up. all outputs and the interface output dout (max6922/max6932/max6934 only) initialize low regardless of the initial logic levels of the clk, din, blank, and load inputs. 4-wire serial interface these driver ics use a 4-wire serial interface with three inputs (din, clk, load) and a data output (dout, max6922/max6932/max6934 only). this interface is used to write data to the ics (figure 4) (table 1). the serial interface data word length is 32 bits for the max6922/max6934, 27 bits for the max6932, and 28 bits for the max6933. the functions of the four serial interface pins are: clk input is the interface clock, which shifts data into the shift register on its rising edge. load input passes data from the shift register to the output latch when load is high (transparent latch), and latches the data on load? falling edge. din is the interface data input, and must be stable when it is sampled on the rising edge of clk. dout is the interface data output, which shifts data out from the shift register on the rising edge of clk. data at din is propagated through the shift register and appears at dout (n clk cycles + t do ) later, where n is the number of drivers in the ic. a fifth input, blank, can be taken high to force the out- puts low, without altering the contents of the output latch- es. when the blank input is low, the outputs follow the state of the output latches. a common use of the blank input is pwm intensity control. the blank input? function is independent of the oper- ation of the serial interface. data can be shifted into the serial interface shift register and latched regardless of the state of blank. writing device registers using the 4-wire serial interface the max6922/max6932/max6933/max6934 are nor- mally written using the following sequence: 1) take clk low. 2) clock n bits of data in order d n-1 first to d0 last into din, observing the data setup and hold times. 3) load the n output latches with a falling edge on load, where n is 27 for the max6932, 28 for the max6933, and 32 for the max6922 and max6934. load may be high or low during a transmission. if load is high, then the data shifted into the shift regis- ter at din appears at the out0 to out n-1 outputs. clk and din may be used to transmit data to other peripherals. activity on clk always shifts data into the shift register. however, the output latches only update on the rising edge of load, and the last n bits of data load t csw t cp t csh t ch t dh t do t ds dn-1 dn-2 d1 d0 dn-1 t cl clk din dout figure 4. 4-wire serial interface timing diagram
max6922/max6932/max6933/max6934 27-, 28-, and 32-output, 76v, serial-interfaced vfd tube drivers _______________________________________________________________________________________ 9 clocked in are loaded. therefore, multiple devices can share clk and din, as long as they have unique load controls. determining driver output voltage drop the outputs are cmos drivers, and have a resistive characteristic. the typical and maximum sink and source output resistances can be calculated from the v h and v l electrical characteristics. use this calculated resistance to determine the output voltage drop at dif- ferent output currents. output current ratings the continuous current-source capability is 40ma per output. outputs may drive up to 75ma as a repetitive peak current, subject to the on-time (output high) being no longer than 1ms, and the duty cycle being such that the output power dissipation is no more than the dissipa- tion for the continuous case. the repetitive peak rating allows outputs to drive a higher current in multiplex grid driver applications, where only one grid is on at a time, and the multiplex time per grid is no more than 1ms. since dissipation is proportional to current squared, the maximum current that can be delivered for a given mul- tiplex ratio is given by: i peak = (grids x 1600) 1/2 ma where grids is the number of grids in a multiplexed display. this means that a duplex application (two grids) can use a repetitive peak current of 56.5ma, a triplex (three grids) application can use a repetitive peak current of 69.2ma, and higher multiplex ratios are limited to 75ma. paralleling outputs any number of outputs within the same package may be paralleled in order to raise the current drive or reduce the output resistance. only parallel outputs directly (by shorting outputs together) if the interface control can be guaranteed to set the outputs to the same level. although the sink output is relatively weak (typically 750 ? ), that resistance is low enough to dissi- pate 530mw when shorted to an opposite level output at a v bb voltage of only 20v. a safe way to parallel out- puts is to use diodes to prevent the outputs from sink- ing current (figure 5). because the diodes also stop the outputs from sinking current from the vfd tube, an external discharge resistor, r, is required. for static tubes, r can be a large value such as 100k ? . for multi- plexed tubes, the value of the resistor can be deter- mined by the load capacitance and timing max6922 max6932 max6933 max6934 out0 out1 d1 d2 r output figure 5. paralleling outputs l = low logic level. h = high logic level. x = don? care. p = present state (shift register). r = previous state (latched). clock input shift register contents load input latch contents blanking input output contents serial data input din clk d0 d1 d2 dn-2 dn-1 load d0 d1 d2 dn-2 dn-1 blank d0 d1 d2 dn-2 dn-1 h hr 0r 1 rn-2 rn-1 l lr 0r 1 rn-2 rn-1 x r0 r1 r2 rn-1 rn xxxx xl r0 r1 r2 rn-1 rn p0 p1 p2 pn-1 pn h p0 p1 p2 pn-1 pn l p0 p1 p2 pn-1 pn xxxx x h llll l table 1. 4-wire serial interface truth table
max6922/max6932/max6933/max6934 27-, 28-, and 32-output, 76v, serial-interfaced vfd tube drivers 10 ______________________________________________________________________________________ characteristics required. resistor r discharges tube capacitance c to 10% of the initial voltage in 2.3 x rc seconds. so, for example, a 15k ? value for r dis- charges 100pf tube grid or anode from 40v to 4v in 3.5?, but draws an additional 2.7ma from the driver when either output is high. power dissipation take care to ensure that the maximum package dissi- pation ratings for the chosen package are not exceed- ed. over-dissipation is unlikely to be an issue when driving static tubes, but the peak currents are usually higher for multiplexed tubes. when using multiple driver devices, try to share the average dissipation evenly between the drivers. determine the power dissipation (p d ) for the max6922/ max6932/max6933/max6934 for static tube drivers with the following equation: p d = (v cc x i cc ) + (v bb x i bb ) + ((v bb - v h ) x i anode x a)) where: a = number of anodes driven (maximum of 32 with the max6922/max6934). i anode = maximum anode current. (v bb - v h ) is the output voltage drop at the given maxi- mum anode current i out . a static tube dissipation example follows: v cc = 5v ?%, v bb = 10v to 18v, a = 32, i out = 2ma p d = (5.25v x 1.5ma)+ (18v x 2.2ma) + ((2.5v x 2ma/25ma) x 2ma x 32) = 60mw determine the power dissipation (p d ) for the max6922/ max6932/max6933/max6934 for multiplex tube drivers with the following equation: p d = (v cc x i cc ) + (v bb x i bb ) + ((v bb - v h ) x i anode x a) + ((v bb - v h ) x i grid )) where: a = number of anodes driven. g = number of grids driven. i anode = maximum anode current. i grid = maximum grid current. the calculation presumes all anodes are on, but only one grid is on. the calculated p d is the worst case, pre- suming one digit is always being driven with all its anodes lit. actual p d can be estimated by multiplying this p d figure by the actual tube drive duty cycle, taking into account interdigit blanking and any pwm intensity control. a multiplexed tube dissipation example follows: v cc = 5v ?%, v bb = 36v to 42v, a = 20, g = 12, i anode = 0.4ma, i grid = 24ma p d = (5.25v x 1.5ma)+ (42v x 2.2ma) + ((2.5v x 0.4ma/25ma) x 0.4ma x 20) + ((2.5v x 24ma/25ma) x 24ma) = 158mw thus, for a 44-pin plcc package (t ja = 1 / 0.0133 = 75.188?/w from absolute maximum ratings ), the maxi- mum allowed ambient temperature t a is given by: t j(max) = t a + (p d x t ja ) = +150? = t a + (0.158 x 75.188c/w) so t a = + 138c. this means that the driver can be operated in this application with a plcc package up to the +125? maximum operating temperature. power-supply considerations the max6922/max6932/max6933/max6934 operate with multiple power-supply voltages. bypass the v cc , v bb , and v ss (max6932/max6933/max6934 only) power-supply pins to gnd with 0.1? capacitors close to the device. the max6932/max6933/max6934 may be operated with v ss tied to gnd if a negative bias supply is not required. for multiplex applications, it may be necessary to add an additional bulk electrolytic capacitor of 1? or greater to the v bb supply. power-supply sequencing the order of the power-supply sequencing is not impor- tant. these ics are damaged if any combination of v cc , v bb , and v ss is grounded while the other supply or supplies are maintained up to their maximum ratings. however, as with any cmos device, do not drive the logic inputs if the logic supply v cc is not operational because the input protection diodes clamp the signals. cascading drivers (max6922/max6932/max6934 only) multiple driver ics may be cascaded, as shown in the typical application circuit , by connecting each driver? dout to din of the next drivers. devices may be cas- caded at the full 5mhz clk speed when v cc 4.5v. when v cc <4.5v, the longer propagation delay (t do ) limits the maximum cascaded clk to 4mhz.
max6922/max6932/max6933/max6934 27-, 28-, and 32-output, 76v, serial-interfaced vfd tube drivers ______________________________________________________________________________________ 11 max6922 din clk load blank max685x vfdout vfclk vfload vfblank dout vfd tube max6922 din clk load blank dout max6922 din clk load blank dout t ypical application circuit chip information transistor count: 3850 process: bicmos
max6922/max6932/max6933/max6934 27-, 28-, and 32-output, 76v, serial-interfaced vfd tube drivers 12 ______________________________________________________________________________________ pin configurations top view 44 1 2 3 440 41 42 43 5 21 24 26 25 27 28 22 23 19 20 8 9 10 11 12 13 14 15 16 17 29 30 31 32 33 34 35 36 37 38 out18 out16 out29 plcc out30 out31 dout v bb v cc din out0 out1 out2 out17 gnd blank load clk out14 out15 n.c. out13 out4 out5 out6 out7 out8 out9 out10 out11 out12 n.c. out19 out20 out21 out22 out23 out24 out25 out26 out27 7 39 out3 out28 6 18 n.c. n.c. max6922 44 1 2 3 440 41 42 43 5 21 24 26 25 27 28 22 23 19 20 8 9 10 11 12 13 14 15 16 17 29 30 31 32 33 34 35 36 37 38 out18 out16 out29 plcc out30 out31 dout v bb v cc din out0 out1 out2 out17 gnd blank load clk out14 out15 n.c. out13 out4 out5 out6 out7 out8 out9 out10 out11 out12 n.c. out19 out20 out21 out22 out23 out24 out25 out26 out27 7 39 out3 out28 6 18 n.c. v ss max6934 44 43 42 41 40 39 38 12 13 14 15 16 17 18 27 28 29 30 31 32 33 7 6 5 4 3 2 1 max6934 thin qfn out27 out28 out26 out25 out24 out23 out22 n.c. out29 out30 out31 dout v bb v cc out3 out4 out5 out6 out7 out8 out9 23 24 25 26 11 10 9 8 out21 out20 out19 out18 out10 out11 out12 n.c. ep load clk gnd blank 37 36 35 34 19 20 21 22 din out0 out1 out2 n.c. out13 out14 out15 out16 out17 v ss 36 v cc din out0 out1 out2 out3 out4 out5 out6 out7 out8 out9 out10 out11 out12 out13 load clk ( ) is for the max6933 ep = exposed paddle 35 34 33 32 31 30 29 28 27 1 2 3 4 5 6 7 8 9 10 v bb dout(out27) out26 out25 out24 out23 out22 out21 out20 out19 out18 out17 out16 v ss out15 out14 blank gnd max6932 max6933 26 25 24 23 22 21 20 19 11 12 13 14 15 16 17 18 ssop
max6922/max6932/max6933/max6934 27-, 28-, and 32-output, 76v, serial-interfaced vfd tube drivers ______________________________________________________________________________________ 13 package information (the package drawing(s) in this data sheet may not reflect the most current specifications. for the latest package outline info rmation, go to www.maxim-ic.com/packages .) plcc.eps family package outline: 20l, 28l, 44l, 52l, 68l plcc 1 1 21-0049 d rev. document control no. approval proprietary information title: d1 d c a2 b1 b a1 a a3 d2 e d3 d1 d d3 n 22.61 20.32 0.800 d3 d2 0.890 0.930 ref ref 23.62 4.20 2.29 3.69 0.51 0.33 0.66 0.23 9.78 8.89 7.37 5.08 12.32 11.43 9.91 7.62 17.40 16.51 14.99 12.70 min min 24.13 25.02 0.120 0.090 a1 ref d3 0.200 0.485 0.300 0.685 0.500 0.985 d d1 d2 d3 d1 d 0.650 0.590 0.950 d d1 d2 d3 0.450 0.390 0.695 0.656 0.630 0.958 0.995 ref 0.495 0.456 0.430 ref 0.050 0.385 inches d d1 d2 0.350 0.290 min a2 a3 b b1 c e 0.145 0.020 0.013 0.026 0.009 0.395 0.356 0.330 max 0.156 0.021 0.032 --- 0.011 inches a 0.165 min 0.180 max 3.04 ref 28 44 68 17.65 16.66 16.00 ref 24.33 25.27 12.57 11.58 10.92 ref ac ae ab 10.03 9.04 8.38 max n 20 3.96 --- 0.53 0.81 0.28 1.27 aa 4.57 max notes: 1. d1 does not include mold flash. 2. mold flash or protrusions not to exceed .20mm (.008") per side. 3. leads to be coplanar within .10mm. 4. controlling dimension: millimeter 5. meets jedec mo047-xx as shown in table. 6. n = number of pins. ref ref d3 0.600 15.24 17.53 19.05 19.94 d1 d2 d 0.750 0.690 0.785 0.756 0.795 0.730 52 19.20 20.19 18.54 ad millimeters millimeters
max6922/max6932/max6933/max6934 27-, 28-, and 32-output, 76v, serial-interfaced vfd tube drivers 14 ______________________________________________________________________________________ package information (continued) (the package drawing(s) in this data sheet may not reflect the most current specifications. for the latest package outline info rmation, go to www.maxim-ic.com/packages .) ssop.eps package outline, 36l ssop, 0.80 mm pitch 1 1 21-0040 e rev. document control no. approval proprietary information title: front view max 0.011 0.104 0.017 0.299 0.013 inches 0.291 0.009 e c dim 0.012 0.004 b a1 min 0.096 a 0.23 7.40 7.60 0.32 millimeters 0.10 0.30 2.44 min 0.44 0.29 max 2.65 0.040 0.020 l 0.51 1.02 h 0.414 0.398 10.11 10.51 e 0.0315 bsc 0.80 bsc d 0.612 0.598 15.20 15.55 h e a1 a d e b 0 -8 l c top view side view 1 36
max6922/max6932/max6933/max6934 27-, 28-, and 32-output, 76v, serial-interfaced vfd tube drivers ______________________________________________________________________________________ 15 package information (continued) (the package drawing(s) in this data sheet may not reflect the most current specifications. for the latest package outline info rmation, go to www.maxim-ic.com/packages .) 32, 44, 48l qfn .eps e l e l a1 a a2 e/ 2 e d/2 d detail a d2/2 d2 b l k e2/2 e2 (ne-1) x e (nd-1) x e e c l c l c l c l k detail b e l l1 package outline 21-0144 2 1 e 32, 44, 48, 56l thin qfn, 7x7x0.8m m
package information (continued) (the package drawing(s) in this data sheet may not reflect the most current specifications. for the latest package outline info rmation, go to www.maxim-ic.com/packages .) max6922/max6932/max6933/max6934 27-, 28-, and 32-output, 76v, serial-interfaced vfd tube drivers maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a maxim product. no circu it patent licenses are implied. maxim reserves the right to change the circuitry and specifications without notice at any time. 16 ____________________maxim integrated products, 120 san gabriel drive, sunnyvale, ca 94086 408-737-7600 2007 maxim integrated products is a registered trademark of maxim integrated products, inc. package outline 21-0144 2 2 e 32, 44, 48, 56l thin qfn, 7x7x0.8m m revision history pages changed at rev 2: 1, 2, 3, 16
e nglish ? ???? ? ??? ? ??? what's ne w p roducts solutions de sign ap p note s sup p ort buy comp any me mbe rs max6934 part number table notes: see the max6934 quickview data sheet for further information on this product family or download the max6934 full data sheet (pdf, 656kb). 1. other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales . 2. didn't find what you need? ask our applications engineers. expert assistance in finding parts, usually within one business day. 3. part number suffixes: t or t&r = tape and reel; + = rohs/lead-free; # = rohs/lead-exempt. more: see full data sheet or part naming c onventions . 4. * some packages have variations, listed on the drawing. "pkgc ode/variation" tells which variation the product uses. 5. part number free sample buy direct package: type pins size drawing code/var * temp rohs/lead-free? materials analysis max6934aqh+d plc c ;44 pin;.653" sq dwg: 21-0049d (pdf) use pkgcode/variation: q44+1 * -40c to +85c rohs/lead-free: yes materials analysis max6934aqh+td plc c ;44 pin;.653" sq dwg: 21-0049d (pdf) use pkgcode/variation: q44+1 * -40c to +85c rohs/lead-free: yes materials analysis max6934aqh-d plc c ;44 pin;.653" sq. dwg: 21-0049d (pdf) use pkgcode/variation: q44-1 * -40c to +85c rohs/lead-free: no materials analysis max6934aqh-td plc c ;44 pin;.653" sq. dwg: 21-0049d (pdf) use pkgcode/variation: q44-1 * -40c to +85c rohs/lead-free: no materials analysis max6934ath thin qfn;44 pin;7x7x0.8mm dwg: 21-0144f (pdf) use pkgcode/variation: t4477-3 * -40c to +125c rohs/lead-free: no materials analysis max6934ath-t -40c to +125c rohs/lead-free: no didn't find what you need?
c ontac t us: send us an email c opyright 2 0 0 7 by m axim i ntegrated p roduc ts , dallas semic onduc tor ? legal n otic es ? p rivac y p olic y

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