MAX6920AWP+ Fast Delivery |IC PHOENIX CO.,LIMITED

MAX6920AWP+ ,12-Output, 76V, Serial-Interfaced VFD Tube DriverApplications Ordering Information● White Goods ● Industrial WeighingPART TEMP RANGE PIN-PACKAGE● Ga ..
MAX6921AUI+ ,20-Output, 76V, Serial-Interfaced VFD Tube DriversFeaturesThe MAX6921/MAX6931 are 20-output, 76V, vacuum- ♦ 5MHz Industry-Standard 4-Wire Serial Inte ..
MAX692A ,Microprocessor Supervisory CircuitsElectrical Characteristics(V = 4.75V to 5.5V for MAX690A/MAX802L/MAX805L, V = 4.5V to 5.5V for MAX6 ..
MAX692ACPA ,Microprocessor Supervisory CircuitsApplicationsOrdering Information continued on last page.* Dice are specified at T = +25°CBattery-Po ..
MAX692ACPA ,Microprocessor Supervisory CircuitsApplicationsOrdering Information continued on last page.* Dice are specified at T = +25°CBattery-Po ..
MAX692ACPA ,Microprocessor Supervisory CircuitsELECTRICAL CHARACTERISTICS(V = 4.75V to 5.5V for MAX690A/MAX802L/MAX805L, V = 4.5V to 5.5V for MAX6 ..
MB3871PFV-G-BND ,Mobile Pentium II DC/DC Converter ICApplications®Mobile Pentium II DC/DC Converter ICMB3871n DESCRIPTIONThe FUJITSU MB3871 is a pulse w ..
MB3875 ,DC/DC Converter IC for ChargingApplications (Lithium ion battery charger)DC/DC Converter IC for ChargingMB3875/MB3877nnnn DESCRIP ..
MB3875PFV ,DC/DC converter IC for chargingApplications (Lithium ion battery charger)DC/DC Converter IC for ChargingMB3875/MB3877nnnn DESCRIP ..
MB3877 ,DC/DC Converter IC for ChargingFUJITSU SEMICONDUCTORDS04-27703-2EDATA SHEETASSP For Power Supply
MB3878 ,DC/DC Converter IC for ChargingApplications (Secondary battery)DC/DC Converter IC for ChargingMB3878nnnn DESCRIPTIONThe MB3878 is ..
MB3878PFV ,DC/DC Converter IC for ChargingApplications (Secondary battery)DC/DC Converter IC for ChargingMB3878nnnn DESCRIPTIONThe MB3878 is ..

MAX6920AWP+
12-Output, 76V, Serial-Interfaced VFD Tube Driver
●White Goods●Gaming Machines●Avionics●Industrial Weighing●Security●TelecomGeneral Description
The MAX6920 is a 12-output, 76V, vacuum fluo-
rescent display (VFD) tube driver that interfaces a
multiplexed VFD tube to a VFD controller such as the
MAX6850–MAX6853 or to a microcontroller. The
MAX6920 is also ideal for driving either static VFD tubes
or telecom relays.
Data is inputted using an industry-standard 4-wire serial
interface (CLOCK, DATA, LOAD, BLANK) for compatibil-
ity with both industry-standard drivers and Maxim’s VFD
controllers.
For easy display control, the active-high BLANK input
forces all driver outputs low, turning the display off, and
automatically puts the MAX6920 into shutdown mode.
Display intensity may also be controlled by pulse-width
modulating the BLANK input.
The MAX6920 has a serial interface data output pin,
DOUT, allowing any number of devices to be cascaded
on the same serial interface.
The MAX6920 is available in a 20-pin SO pack-
age. Maxim also offers VFD drivers with either 20
(MAX6921/MAX6931) or 32 outputs (MAX6922 and
MAX6932).
Features● 5MHz Industry-Standard 4-Wire Serial Interface● 3V to 5.5V Logic Supply Range● 8V to 76V Grid/Anode Supply Range● 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● Small 20-Pin SO Package● -40°C to +125°C Temperature Range
Applications
PARTTEMP RANGEPIN-PACKAGE
MAX6920AWP-40°C to +125°C20 Wide SO
MAX6920
DIN
CLK
LOAD
OUT0 – OUT11
VFD TUBE
VFDOUT
VFLOAD
VFCLK
BLANKVFBLANK20
VCC
GND
VBB
+60V+5V
100nF
100nF
TOP VIEW
VCC
DIN
OUT0
OUT1
OUT2
OUT3
OUT4
OUT5
LOAD
CLKGND
BLANK
OUT6
OUT7
OUT8
OUT9
OUT10
OUT11
DOUT
VBB
MAX6920AWP
Typical Operating Circuit
Ordering Information
Pin Coniguration
MAX692012-Output, 76V, Serial-Interfaced VFD Tube Driver
Voltage (with respect to GND)
VBB ....................................................................-0.3V to +80V
VCC ......................................................................-0.3V to +6V
OUT_ .....................................................-0.3V to (VBB + 0.3V)
All Other Pins .......................................-0.3V to (VCC + 0.3V)
OUT_ Continuous Source Current ...................................-45mA
OUT_ Pulsed (1ms max, 1/4 max duty) Source Current ....-80mA
Total OUT_ Continuous Source Current ........................-540mA
Total OUT_ Continuous Sink Current ................................60mA
Total OUT_ Pulsed (1ms max, 1/4 max duty)Source Current ...........................................................-960mA
OUT_ Sink Current .............................................................15mA
CLK, DIN, LOAD, BLANK, DOUT Current ......................±10mA
Continuous Power Dissipation
20-Pin Wide SO (derate 10mW/°C over TA = +70°C) ....800mW
Operating Temperature Range (TMIN to TMAX) -40°C to +125°C
Junction Temperature ......................................................+150°C
Storage Temperature Range ............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
(Typical Operating Circuit, VBB = 8V to 76V, VCC = 3V to 5.5V, TA = TMIN to TMAX, unless otherwise noted.) (Note 1)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
Logic Supply VoltageVCC35.5V
Tube Supply VoltageVBB876V
Logic Supply Operating CurrentICC
All outputs OUT_
low, CLK = idle
TA = +25°C72170TA = -40°C to +125°C200
All outputs OUT_
high, CLK = idle
TA = +25°C350650
TA = -40°C to +125°C700
Tube Supply Operating CurrentIBB
All outputs OUT_ low
TA = +25°C12
TA = -40°C to +125°C4.2
All outputs OUT_
high
TA = +25°C0.530.85
TA = -40°C to +125°C0.9
High-Voltage OUT_VH
VBB ≥ 15V,
IOUT = -25mA
TA = +25°CVBB - 1.1
TA = -40°C to +85°CVBB - 2
TA = -40°C to +125°CVBB - 2.5
VBB ≥ 15V,
IOUT = -40mA
TA = -40°C to +85°CVBB - 3.5
TA = -40°C to +125°CVBB - 4.0
8V < VBB < 15V,
IOUT = -25mA
TA = +25°CVBB - 1.2
TA = -40°C to +85°CVBB - 2.5
TA = -40°C to +125°CVBB - 3.0
Low-Voltage OUT_VL
VBB ≥ 15V,
IOUT = 1mA
TA = +25°C0.751
TA = -40°C to +85°C1.5
TA = -40°C to +125°C1.9
8V < VBB < 15V,
IOUT = 1mA
TA = +25°C0.81.1
TA = -40°C to +85°C1.6
Electrical Characteristics
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.
Absolute Maximum Ratings
MAX692012-Output, 76V, Serial-Interfaced VFD Tube Driver
Note 1: All parameters are tested at TA = +25°C. 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.
(Typical Operating Circuit, VBB = 8V to 76V, VCC = 3V to 5.5V, TA = TMIN to TMAX, unless otherwise noted.) (Note 1)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
Rise Time OUT_ (20% to 80%)tRVBB = 60V, CL = 50pF, RL = 2.3kW0.92µs
Fall Time OUT_ (80% to 20%)tFVBB = 60V, CL = 50pF, RL = 2.3kW0.61.5µs
SERIAL INTERFACE TIMING CHARACTERISTICS
LOAD Rising to OUT_ Falling
Delay(Notes 2, 3)0.91.8µs
LOAD Rising to OUT_ Rising Delay(Notes 2, 3)1.22.4µs
BLANK Rising to OUT_ Falling
Delay(Notes 2, 3)0.91.8µs
BLANK Falling to OUT_ Rising
Delay(Notes 2, 3)1.32.5µs
Input Leakage Current
CLK, DIN, LOAD, BLANKIIH, IIL0.0510µA
Logic-High Input Voltage
CLK, DIN, LOAD, BLANKVIH0.8 x
VCCV
Logic-Low Input Voltage
CLK, DIN, LOAD, BLANKVIL0.3 x
VCCV
Hysteresis Voltage
DIN, CLK, LOAD, BLANKDVI0.6V
High-Voltage DOUTVOHISOURCE = -1.0mAVCC –
0.5V
Low-Voltage DOUTVOLISINK = 1.0mA0.5V
Rise and Fall Time DOUTCDOUT = 10pF
(Note 2)
3V to 4.5V60100ns4.5V to 5.5V3080
CLK Clock PeriodtCP200ns
CLK Pulse-Width HightCH90ns
CLK Pulse-Width LowtCL90ns
CLK Rise to LOAD Rise Hold TimetCSH(Note 2)100ns
DIN Setup TimetDS5ns
DIN Hold TimetDH3V to 4.5V20ns4.5V to 5.5V15
DOUT Propagation DelaytDOCDOUT = 10pF
3.0V to 4.5V251202404.5V to 5.5V2075150
LOAD Pulse HightCSW55ns
Electrical Characteristics (continued)
MAX692012-Output, 76V, Serial-Interfaced VFD Tube Driver
(VCC = 5.0V, VBB = 76V, and TA = +25°C, unless otherwise noted.)
OUTPUT RISE AND
FALL WAVEFORM
MAX6920 toc11
1µs/div
BLANK
2V/div
OUT_
20V/div
OUTPUT VOLTAGE
vs. TEMPERATURE (OUTPUT LOW)
MAX6920 toc06
OUTPUT VOLTAGE (V)
VBB = 40V
VBB = 8V
VBB = 76V
IOUT = 4mA
OUTPUT VOLTAGE (VBB - VH)
vs. TEMPERATURE (OUTPUT HIGH)
MAX6920 toc05
TEMPERATURE (°C)
OUTPUT VOLTAGE (V)
VBB = 76V
VBB = 40V
VBB = 8V
IOUT = -40mA
SUPPLY CURRENT (ICC)
vs. TEMPERATURE (OUTPUTS HIGH)
MAX6920 toc04
TEMPERATURE (°C)
SUPPLY CURRENT (A)10
VCC = 5V, CLK = 5MHz
VCC = 3.3V, CLK = 5MHz
VCC = 5V, CLK = IDLE
VCC = 3.3V, CLK = IDLE
LOGIC SUPPLY CURRENT (ICC)
vs. TEMPERATURE (OUTPUTS LOW)
MAX6920 toc03
TEMPERATURE (°C)
SUPPLY CURRENT (
VCC = 5V, CLK = 5MHz
VCC = 3.3V, CLK = 5MHz
VCC = 5V, CLK = IDLE
VCC = 3.3V, CLK = IDLE
TUBE SUPPLY CURRENT (IBB)
vs. TEMPERATURE (OUTPUTS HIGH)
MAX6920 toc02
TEMPERATURE (°C)
SUPPLY CURRENT (mA)
VBB = 76V
VBB = 40VVBB = 8V
TUBE SUPPLY CURRENT (IBB)
vs. TEMPERATURE (OUTPUTS LOW)
MAX6920 toc01
TEMPERATURE (°C)
SUPPLY CURRENT (mA)
VBB = 76V
VBB = 40VVBB = 8V
Typical Operating Characteristics
MAX692012-Output, 76V, Serial-Interfaced VFD Tube Driver
Figure 1. MAX6920 Functional Diagram
PIN NAMEFUNCTIONVBBVFD Tube Supply VoltageDOUTSerial-Clock Output. Data is clocked out of the internal shift register to DOUT on CLK’s rising edge.
3–8, 13–18OUT0 to
OUT11VFD Anode and Grid Drivers. OUT0 to OUT11 are push-pull outputs swinging from VBB to GND.BLANKBlanking Input. High forces outputs OUT0 to OUT11 low, without altering the contents of the output
latches. Low enables outputs OUT0 to OUT11 to follow the state of the output latches. GNDGroundCLKSerial-Clock Input. Data is loaded into the internal shift register on CLK’s rising edge. LOADLoad 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.DINSerial-Data Input. Data is loaded into the internal shift register on CLK’s rising edge.VCCLogic Supply Voltage
SERIAL-TO-PARALLEL SHIFT REGISTER
LATCHES
CLK
DIN
LOAD
BLANK
OUT0OUT1OUT2OUT11
DOUT
MAX6920
Pin Description
MAX692012-Output, 76V, Serial-Interfaced VFD Tube Driver
Detailed Description
The MAX6920 is a VFD tube driver comprising a
4-wire serial interface driving 12 high-voltage rail-to-rail
output ports. The driver is suitable 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 12-bit shift reg-
ister and a 12-bit transparent latch. The shift register is
written through a clock input CLK and a data input DIN
and the data propagates to a data output 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.
Each driver output is a slew-rated controlled CMOS push-
pull switch driving between VBB and GND. The output rise
time is always slower than the output fall time to avoid
shoot-through currents during output transitions. The
output slew rates are slow enough to minimize EMI, yet
are fast enough so as not to impact the typical 100µs digit
multiplex period and affect the display intensity.
Initial Power-Up and Operation
An internal reset circuit clears the internal registers of
the MAX6920 on power-up. All outputs OUT0 to OUT11
and the interface output DOUT initialize low regardless
of the initial logic levels of the CLK, DIN, BLANK, and
LOAD inputs.
4-Wire Serial Interface
The MAX6920 uses a 4-wire serial interface with three
inputs (DIN, CLK, LOAD) and a data output (DOUT).
This interface is used to write output data to the
MAX6920 (Figure 3) (Table 1). The serial interface data
word length is 12 bits, D0–D11.
The functions of the four serial interface pins are:● CLK input is the interface clock, which shifts data into
the MAX6920’s 12-bit shift register on its rising edge.● LOAD input passes data from the MAX6920’s 12-bit
shift register to the 12-bit output latch when LOAD
is high (transparent latch), and latches the data on
LOAD’s falling edge.
Figure 3. 4-Wire Serial Interface Timing Diagram
Figure 2. MAX6920 CMOS Output Driver Structure
LOAD
tCSW
tCP
tCSHtCH
tDH
tDO
tDS
D11D10D1D0
D11
tCL
CLK
DIN
DOUT
SLEW- RATE
CONTROL
VBB
OUT_
40Ω
TYPICAL
750Ω
TYPICAL
MAX692012-Output, 76V, Serial-Interfaced VFD Tube Driver

Partno	Mfg	Dc	Qty	Available	Descript
MAX6920AWP+ \|MAX6920AWP	MAXIM	N/a	39	avai	12-Output, 76V, Serial-Interfaced VFD Tube Driver