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MAX6931AUI+

P1-P3P4-P6P7-P9P10-P12P13-P13
Typical Operating Characteristics
(V
CC
= 5.0V, V
BB
= 76V, and T
A
= +25°C, unless otherwise noted.)
MAX6921/MAX6931
20-Output, 76V, Serial-Interfaced
VFD Tube Drivers
4 _______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
(
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)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
3V to 4.5V 60 100
Rise and Fall Time DOUT
C
DOUT
= 10pF
(Note 2)
4.5V to 5.5V 30 80
ns
CLK Clock Period t
CP
200 ns
CLK Pulse-Width High t
CH
90 ns
CLK Pulse-Width Low t
CL
90 ns
CLK Rise to LOAD Rise Hold t
CSH
(Note 2) 100 ns
DIN Setup Time t
DS
5ns
3.0V to 4.5V 20
DIN Hold Time t
DH
4.5V to 5.5V 15
ns
3.0V to 4.5V 25 120 240
DOUT Propagation Delay t
DO
C
DOUT
= 10pF
4.5V to 5.5V 20 75 150
ns
LOAD Pulse High t
CSW
55 ns
Note 1: All parameters are tested at T
A
= +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 (I
BB
)
vs. TEMPERATURE (OUTPUTS LOW)
MAX6921/31 toc01
TEMPERATURE (°C)
SUPPLY CURRENT (mA)
1008040 60020-20
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
0
-40 120
V
BB
= 76V
V
BB
= 40V
V
BB
= 8V
TUBE SUPPLY CURRENT (I
BB
)
vs. TEMPERATURE (OUTPUTS HIGH)
MAX6921/31 toc02
TEMPERATURE (°C)
SUPPLY CURRENT (mA)
1008040 60020-20
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
0
-40 120
V
BB
= 76V
V
BB
= 40V
V
BB
= 8V
LOGIC SUPPLY CURRENT (I
CC
)
vs. TEMPERATURE (OUTPUTS LOW)
MAX6921/31 toc03
TEMPERATURE (°C)
SUPPLY CURRENT (µA)
1008040 60020-20
50
100
150
200
250
300
350
400
0
-40 120
V
CC
= 5V, CLK = 5MHz
V
CC
= 3.3V, CLK = 5MHz
V
CC
= 5V, CLK = IDLE
V
CC
= 3.3V, CLK = IDLE
MAX6921/MAX6931
20-Output, 76V, Serial-Interfaced
VFD Tube Drivers
_______________________________________________________________________________________
5
OUTPUT RISE AND FALL WAVEFORM
MAX6921/31 toc07
1µs/div
BLANK
2V/div
OUT_
20V/div
Typical Operating Characteristics (continued)
(V
CC
= 5.0V, V
BB
= 76V, and T
A
= +25°C, unless otherwise noted.)
LOGIC SUPPLY CURRENT (I
CC
)
vs. TEMPERATURE (OUTPUTS HIGH)
MAX6921/31 toc04
TEMPERATURE (°C)
SUPPLY CURRENT (µA)
1008040 60020-20
450
500
550
600
650
700
750
800
400
-40 120
V
CC
= 5V, CLK = 5MHz
V
CC
= 3.3V, CLK = 5MHz
V
CC
= 5V, CLK = IDLE
V
CC
= 3.3V, CLK = IDLE
OUTPUT VOLTAGE (V
BB
- V
H
)
vs. TEMPERATURE (OUTPUT HIGH)
MAX6921/31 toc05
TEMPERATURE (°C)
OUTPUT VOLTAGE (V)
1008040 60020-20
0.5
1.0
1.5
2.0
2.5
3.0
3.5
0
-40 120
V
BB
= 76V
V
BB
= 40V
V
BB
= 8V
I
OUT
= -40mA
OUTPUT VOLTAGE
vs. TEMPERATURE (OUTPUT LOW)
MAX6921/31 toc06
TEMPERATURE (°C)
OUTPUT VOLTAGE (V)
1008040 60020-20
2
4
6
8
10
12
14
0
-40 120
V
BB
= 40V
V
BB
= 8V
V
BB
= 76V
I
OUT
= 4mA
PIN
TSSOP
WIDE
SO/PLCC
MAX6921 MAX6931 MAX6921
NAME FUNCTION
1–5 1–5 —
OUT4 to
OUT0
VFD Anode and Grid Drivers. OUT4 to OUT0 are push-pull outputs swinging from
V
BB
to GND (MAX6921 only), and from V
BB
to V
SS
(MAX6931 only).
6 6 27 DIN Serial-Data Input. Data is loaded into the internal shift register on CLK’s rising edge.
7 7 28 V
CC
Logic Supply Voltage. Bypass to GND with 100nF capacitor.
881V
BB
VFD Tube Supply Voltage. Bypass to GND with 100nF capacitor.
9—2DOUT
Serial-Clock Output. Data is clocked out of the internal shift register to DOUT on
CLK’s rising edge.
Pin Description
MAX6921/MAX6931
20-Output, 76V, Serial-Interfaced
VFD Tube Drivers
6 _______________________________________________________________________________________
PIN
TSSOP
WIDE
SO/PLCC
MAX6921 MAX6931 MAX6921
NAME FUNCTION
—9—V
SS
Filament Bias Supply Voltage. Bypass to GND with a 100nF capacitor.
10–19 10–19 —
OUT19 to
OUT10
VFD Anode and Grid Drivers. OUT19 to OUT10 are push-pull outputs swinging from
V
BB
to GND (MAX6921 only), and from V
BB
to V
SS
(MAX6931 only).
— — 3-12
OUT19 to
OUT10
VFD Anode and Grid Drivers. OUT19 to OUT10 are push-pull outputs swinging from
V
BB
to GND.
20 20 13 BLANK
Blanking Input. High forces outputs OUT0 to OUT19 low, without altering the
contents of the output latches. Low enables outputs OUT0 to OUT19 to follow the
state of the output latches.
21 21 14 GND Ground
22 22 15 CLK S er i al - C l ock Inp ut. D ata i s l oad ed i nto the i nter nal shi ft r eg i ster on C LK’ s r i si ng ed g e.
23 23 16 LOAD
Load Input. Data is loaded transparently from the internal shift register to the output
latch while LOAD is high. Data is latched into the output latch on LOAD’s rising
edge, and retained while LOAD is low.
24–28 24–28 —
OUT9 to
OUT5
VFD Anode and Grid Drivers. OUT9 to OUT5 are push-pull outputs swinging from
V
BB
to GND (MAX6921 only), and from V
BB
to V
SS
(MAX6931 only).
— — 17-26
OUT9 to
OUT0
VFD Anode and Grid Drivers. OUT9 to OUT0 are push-pull outputs swinging from
V
BB
to GND.
Pin Description (continued)
SERIAL-TO-PARALLEL SHIFT REGISTER
LATCHES
CLK
DIN
LOAD
BLANK
OUT0 OUT1 OUT2
OUT19
DOUT
MAX6921 ONLY
MAX6921
MAX6931
Figure 1. MAX6921/MAX6931 Functional Diagram
P1-P3P4-P6P7-P9P10-P12P13-P13

MAX6931AUI+

Mfr. #:
Buy MAX6931AUI+
Manufacturer:
Maxim Integrated
Description:
VFD Drivers 20-Output 76V Serial VFD Tube Drive
Lifecycle:
New from this manufacturer.
Delivery:
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