MAX6921 datasheet(2/14 Pages) MAXIM

2 / 14 page

20-Output, 76V, Serial-Interfaced

VFD Tube Drivers

_______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(Typical Operating Circuit, VBB = 8V to 76V, VCC = 3V to 5.5V, VSS = -11V to 0V, VBB - VSS

≤ 76V, TA = TMIN to TMAX, unless other-

wise noted.) (Note 1)

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.

Voltage (with respect to GND)

VBB .........................................................................-0.3V to +80V

VCC ...........................................................................-0.3V to +6V

VSS (MAX6931 only) ...............................................-12V to +0.3V

VBB - VSS (MAX6931 only) .....................................-0.3V to +80V

OUT_ (MAX6921 only) ..................(GND - -0.3V) to (VBB + 0.3V)

OUT_ (MAX6931 only) ....................(VSS - -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 .................................90mA

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 (TA = +70°C)

28-Pin TSSOP (derate 12.8mW/°C

over +70°C)................................................................1025mW

28-Pin Wide SO (derate 12.5mW/°C

over +70°C)................................................................1000mW

28-Pin PLCC (derate 10.5mW/°C

over +70°C)..................................................................842mW

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

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Logic Supply Voltage

VCC

5.5

Tube Supply Voltage

VBB

876

Bias Supply Voltage

(MAX6931 Only)

VSS

-11

Total Supply Voltage

(MAX6931 Only)

VBB - VSS

TA = +25°C

170

All outputs OUT_ low,

CLK = idle

TA = -40°C to +125°C

200

TA = +25°C

540

900

Logic Supply Operating Current

ICC

All outputs OUT_ high,

CLK = idle

TA = -40°C to +125°C

1000

µA

TA = +25°C

1.65

3.0

All outputs OUT_ low

TA = -40°C to +125°C

6.9

TA = +25°C

0.85

1.3

Tube Supply Operating Current

IBB

All outputs OUT_ high

TA = -40°C to +125°C

1.4

TA = +25°C

-0.8

-0.38

All outputs OUT_ low

TA = -40°C to +125°C

-1.9

TA = +25°C

-1.4

-0.87

Bias Supply Operating Current

(MAX6931 Only)

ISS

All outputs OUT_ high

TA = -40°C to +125°C

-1.5

TA = +25°CVBB - 1.1

TA = -40°C to +85°CVBB - 2

VBB

≥ 15V

IOUT = -25mA

TA = -40°C to +125°CVBB - 2.5

TA = -40°C to +85°CVBB - 3.5

VBB

≥ 15V

IOUT = -40mA

TA = -40°C to +125°CVBB - 4.0

TA = +25°CVBB - 1.2

TA = -40°C to +85°CVBB - 2.5

High-Voltage OUT_

8V < VBB < 15V

IOUT = -25mA

TA = -40°C to +125°CVBB - 3.0

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