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MAX6921AWI+

更新时间： 2024-01-05 14:24:15
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美信 - MAXIM 驱动器
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19-3020; Rev 0; 10/03  
20-Output, 76V, Serial-Interfaced  
VFD Tube Drivers  
General Description  
Features  
ꢀ 5MHz Industry-Standard 4-Wire Serial Interface  
ꢀ 3V to 5.5V Logic Supply Range  
The MAX6921/MAX6931 are 20-output, 76V, vacuum-  
fluorescent display (VFD) tube drivers that interface a  
multiplexed VFD tube to a VFD controller, such as the  
MAX6850–MAX6853, or to a microcontroller. The  
MAX6921/MAX6931 are also ideal for driving static VFD  
tubes or telecom relays.  
ꢀ 8V to 76V Grid/Anode Supply Range  
ꢀ -11V to 0V Filament Bias Supply (MAX6931 Only)  
ꢀ Push-Pull CMOS High-Voltage Outputs  
Data is input using an industry standard 4-wire serial  
interface (CLOCK, DATA, LOAD, BLANK), compatibile  
with either Maxim’s or industry-standard VFD driver and  
controller.  
ꢀ Outputs can Source 40mA, Sink 4mA  
Continuously  
ꢀ Outputs can Source 75mA Repetitive Pulses  
ꢀ Outputs can be Paralleled for Higher Current Drive  
For easy display control, the active-high BLANK input  
forces all driver outputs low, turning the display off, and  
automatically puts the MAX6921/MAX6931 into shut-  
down mode. Display intensity may also be controlled by  
directly pulse-width modulating the BLANK input.  
ꢀ Any Output can be Used as a Grid or an Anode  
Driver  
ꢀ Blank Input Simplifies PWM Intensity Control  
ꢀ Small 28-Pin TSSOP Package  
The MAX6921 has a serial interface data output, DOUT,  
allowing any number of devices to be cascaded on the  
same serial interface.  
ꢀ -40°C to +125°C Temperature Range  
The MAX6931 has a negative supply voltage input, V  
allowing the drivers’ output swing to be made bipolar to  
simplify filament biasing in many applications.  
,
SS  
Ordering Information  
PART  
MAX6921AUI  
MAX6921AWI  
MAX6921AQI  
MAX6931AUI  
TEMP RANGE  
-40°C to +125°C  
-40°C to +125°C  
-40°C to +125°C  
-40°C to +125°C  
PIN-PACKAGE  
28 TSSOP  
The MAX6921 is available in 28-pin TSSOP, SO, and  
PLCC packages. The MAX6931 is available in a 28-pin  
TSSOP package.  
28 Wide SO  
28 PLCC  
Maxim also offers 12-output VFD drivers (MAX6920) and  
32-output VFD drivers (MAX6922/MAX6932).  
28 TSSOP  
Typical Operating Circuit  
Applications  
White Goods  
Gaming Machines  
Automotive  
Industrial Weighing  
Security  
+5V  
+60V  
C2  
100nF  
C1  
100nF  
Telecom  
Avionics  
VFD Modules  
Industrial Control  
7
V
8
V
Instrumentation  
CC  
BB  
µC  
MAX6931  
6
22  
23  
20  
20  
VFDOUT  
VFCLK  
DIN  
OUT0–OUT19  
CLK  
VFLOAD  
LOAD  
BLANK  
VFBLANK  
V
GND  
21  
SS  
9
-7V  
C3  
100nF  
Pin Configurations appear at end of data sheet.  
________________________________________________________________ Maxim Integrated Products  
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at  
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.  
1234567...14

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MAX6921AWI+ 替代型号

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