MAX6921 datasheet(4/14 Pages) MAXIM

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Typical Operating Characteristics

(VCC = 5.0V, VBB = 76V, and TA = +25°C, unless otherwise noted.)

20-Output, 76V, Serial-Interfaced

VFD Tube Drivers

_______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS (continued)

(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)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

3V to 4.5V

100

Rise and Fall Time DOUT

CDOUT = 10pF

(Note 2)

4.5V to 5.5V

CLK Clock Period

tCP

200

CLK Pulse-Width High

tCH

CLK Pulse-Width Low

tCL

CLK Rise to LOAD Rise Hold

tCSH

(Note 2)

100

DIN Setup Time

tDS

5ns

3.0V to 4.5V

DIN Hold Time

tDH

4.5V to 5.5V

3.0V to 4.5V

120

240

DOUT Propagation Delay

tDO

CDOUT = 10pF

4.5V to 5.5V

150

LOAD Pulse High

tCSW

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.

TUBE SUPPLY CURRENT (IBB)

vs. TEMPERATURE (OUTPUTS LOW)

TEMPERATURE (

°C)

100

020

-20

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

2.0

-40

120

VBB = 76V

VBB = 40V

VBB = 8V

TUBE SUPPLY CURRENT (IBB)

vs. TEMPERATURE (OUTPUTS HIGH)

TEMPERATURE (

°C)

100

020

-20

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

2.0

-40

120

VBB = 76V

VBB = 40V

VBB = 8V

LOGIC SUPPLY CURRENT (ICC)

vs. TEMPERATURE (OUTPUTS LOW)

TEMPERATURE (

°C)

100

020

-20

100

150

200

250

300

350

400

-40

120

VCC = 5V, CLK = 5MHz

VCC = 3.3V, CLK = 5MHz

VCC = 5V, CLK = IDLE

VCC = 3.3V, CLK = IDLE

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