Datasheet

MAX6921/MAX6931
20-Output, 76V, Serial-Interfaced
VFD Tube Drivers
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
( Typical Operating Circuit , V
BB
= 8V to 76V, V
CC
= 3V to 5.5V, V
SS
= -11V to 0V, V
BB
- V
SS
≤ 76V, T
A
= T
MIN
to T
MAX
, 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)
V
BB
.........................................................................-0.3V to +80V
V
CC
...........................................................................-0.3V to +6V
V
SS
(MAX6931 only) ...............................................-12V to +0.3V
V
BB
- V
SS
(MAX6931 only) .....................................-0.3V to +80V
OUT_ (MAX6921 only) ..................(GND - -0.3V) to (V
BB
+ 0.3V)
OUT_ (MAX6931 only) ....................(V
SS
- -0.3V) to (V
BB
+ 0.3V)
All Other Pins..............................................-0.3V to (V
CC
+ 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 (T
A
= +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
(T
MIN
to T
MAX
) ...............................................-40°C to +125°C
Junction Temperature......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Soldering Temperature (reflow)
Wide SO, TSSOP lead(Pb)-free ...................................+260°C
PLCC lead(Pb)-free......................................................+245°C
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Logic Supply Voltage V
CC
3 5.5 V
Tube Supply Voltage V
BB
876V
Bias Supply Voltage
(MAX6931 Only)
V
SS
-11 0 V
Total Supply Voltage
(MAX6931 Only)
V
BB
- V
SS
76 V
T
A
= +25°C 78 170
All outputs OUT_ low,
CLK = idle
T
A
= -40°C to +125°C 200
T
A
= +25°C 540 900
Logic Supply Operating Current I
CC
All outputs OUT_ high,
CLK = idle
T
A
= -40°C to +125°C 1000
µA
T
A
= +25°C 1.65 3.0
All outputs OUT_ low
T
A
= -40°C to +125°C 6.9
T
A
= +25°C 0.85 1.3
Tube Supply Operating Current I
BB
All outputs OUT_ high
T
A
= -40°C to +125°C 1.4
mA
T
A
= +25°C -0.8 -0.38
All outputs OUT_ low
T
A
= -40°C to +125°C -1.9
T
A
= +25°C -1.4 -0.87
Bias Supply Operating Current
(MAX6931 Only)
I
SS
All outputs OUT_ high
T
A
= -40°C to +125°C -1.5
mA