MAX6920AWP+T Maxim Integrated Products, MAX6920AWP+T Datasheet

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MAX6920AWP+T

Manufacturer Part Number
MAX6920AWP+T
Description
IC DRVR VFD TUBE SRL 20-SOIC
Manufacturer
Maxim Integrated Products
Datasheet

Specifications of MAX6920AWP+T

Display Type
Vacuum Fluorescent (VF)
Interface
4-Wire Serial
Current - Supply
1mA
Voltage - Supply
8 V ~ 76 V
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
20-SOIC (7.5mm Width)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Configuration
-
Digits Or Characters
-
Lead Free Status / Rohs Status
 Details
The MAX6920 is a 12-output, 76V, vacuum fluorescent
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 compatibili-
ty 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 package.
Maxim also offers VFD drivers with either 20
(MAX6921/MAX6931) or 32 outputs (MAX6922 and
MAX6932).
19-3061; Rev 0; 10/03
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.
TOP VIEW
White Goods
Gaming Machines
Automotive
Avionics
OUT11
OUT10
BLANK
DOUT
OUT9
OUT8
OUT7
OUT6
GND
V
BB
________________________________________________________________ Maxim Integrated Products
10
1
2
3
4
5
6
7
8
9
MAX6920AWP
General Description
Pin Configuration
Industrial Weighing
Security
Telecom
Applications
20
19
18
17
16
15
14
13
12
11
12-Output, 76V, Serial-Interfaced
V
DIN
OUT0
OUT1
OUT2
OUT3
OUT4
OUT5
LOAD
CLK
CC
o 5MHz Industry-Standard 4-Wire Serial Interface
o 3V to 5.5V Logic Supply Range
o 8V to 76V Grid/Anode Supply Range
o Push-Pull CMOS High-Voltage Outputs
o Outputs can Source 40mA, Sink 4mA
o Outputs can Source 75mA Repetitive Pulses
o Outputs can be Paralleled for Higher Current
o Any Output can be Used as a Grid or an Anode
o Blank Input Simplifies PWM Intensity Control
o Small 20-Pin SO Package
o -40°C to +125°C Temperature Range
MAX6920AWP
Continuously
Drive
Driver
PART
µC
VFBLANK
VFDOUT
VFLOAD
VFCLK
Typical Operating Circuit
VFD Tube Driver
19
11
12
-40°C to +125°C
9
+5V
C1
100nF
Ordering Information
TEMP RANGE
DIN
CLK
LOAD
BLANK
20
V
CC
MAX6920
10
OUT0 – OUT11
GND
1
V
BB
+60V
12
PIN-PACKAGE
20 Wide SO
Features
C2
100nF
1

Related parts for MAX6920AWP+T

MAX6920AWP+T Summary of contents

Page 1

... OUT6 8 BLANK 9 GND 10 ________________________________________________________________ Maxim Integrated Products 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. 12-Output, 76V, Serial-Interfaced o 5MHz Industry-Standard 4-Wire Serial Interface 5.5V Logic Supply Range 76V Grid/Anode Supply Range o Push-Pull CMOS High-Voltage Outputs ...

Page 2

Serial-Interfaced VFD Tube Driver ABSOLUTE MAXIMUM RATINGS Voltage (with respect to GND ................................................................................. V .......................................................................-0.3V to +6V CC OUT_.......................................................-0. All Other Pins..........................................-0. OUT_ Continuous Source Current ....................................-45mA OUT_ Pulsed (1ms max, 1/4 ...

Page 3

ELECTRICAL CHARACTERISTICS (continued) (Typical Operating Circuit 76V PARAMETER SYMBOL Rise Time OUT_ (20% to 80%) Fall Time OUT_ (80% to 20%) SERIAL INTERFACE TIMING CHARACTERISTICS LOAD Rising to OUT_ Falling Delay LOAD Rising to ...

Page 4

Serial-Interfaced VFD Tube Driver (V = 5.0V 76V, and T = +25°C, unless otherwise noted TUBE SUPPLY CURRENT ( vs. TEMPERATURE (OUTPUTS LOW) 2.0 1.8 1.6 1 76V 1.2 ...

Page 5

PIN NAME 1 V VFD Tube Supply Voltage BB 2 DOUT Serial-Clock Output. Data is clocked out of the internal shift register to DOUT on CLK’s rising edge. OUT0 to 3–8, 13–18 VFD Anode and Grid Drivers. OUT0 to OUT11 ...

Page 6

Serial-Interfaced VFD Tube Driver V BB 40Ω TYPICAL SLEW- RATE CONTROL 750Ω TYPICAL Figure 2. MAX6920 CMOS Output Driver Structure Detailed Description The MAX6920 is a VFD tube driver comprising a 4-wire serial interface driving 12 high-voltage Rail-to-Rail® ...

Page 7

Table 1. 4-Wire Serial Interface Truth Table CLOCK SERIAL SHIFT REGISTER CONTENTS INPUT DATA INPUT CLK … Dn-1 DIN … Rn-2 Rn … Rn-2 Rn ...

Page 8

Serial-Interfaced VFD Tube Driver Since dissipation is proportional to current squared, the maximum current that can be delivered for a given mul- tiplex ratio is given by (grids x 1600) PEAK where grids is the number ...

Page 9

This means that the driver can be operated in this application up to the MAX6920’s +125°C maximum operating temperature. Power-Supply Considerations The MAX6920 operates with multiple power-supply volt- ages. Bypass the V and GND with a 0.1µF ...

Page 10

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 10 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2003 Maxim Integrated Products ...

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