MAX7219CNG+ Maxim, MAX7219CNG+ Datasheet - Page 8

• Manufacturer Part Number: MAX7219CNG+
• Description: Display Driver, 8-Digit LED, Serial Interface, 0 to 70 C, Narrow PDIP24
• Manufacturer: Maxim

Specifications of MAX7219CNG+

• Lead Free Status / Rohs Status: RoHS Compliant part Electrostatic Device

Serially Interfaced, 8-Digit LED Display Drivers
Table 5. Code B Font
*The decimal point is set by bit D7 = 1
Table 6. No-Decode Mode Data Bits and
Corresponding Segment Lines
8
CHARACTER
7-SEGMENT
Corresponding
Segment Line
_______________________________________________________________________________________
blank
—
E
H
P
0
1
2
3
4
5
6
7
8
9
L
E
F
D
G
A
D7*
DP
D7
C
B
DP
D6
D6–D4
A
STANDARD 7-SEGMENT LED
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
D5
B
REGISTER DATA
REGISTER DATA
D4
D3
C
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
D3
D
D2
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
D2
E
D1
D1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
F
D0
G
D0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
DP*
The MAX7219/MAX7221 allow display brightness to be
controlled with an external resistor (R
between V+ and ISET. The peak current sourced from
the segment drivers is nominally 100 times the current
entering ISET. This resistor can either be fixed or vari-
able to allow brightness adjustment from the front
panel. Its minimum value should be 9.53kΩ, which typi-
cally sets the segment current at 40mA. Display bright-
ness can also be controlled digitally by using the
intensity register.
Digital control of display brightness is provided by an
internal pulse-width modulator, which is controlled by
the lower nibble of the intensity register. The modulator
scales the average segment current in 16 steps from a
maximum of 31/32 down to 1/32 of the peak current set
by R
intensity register format. The minimum interdigit blank-
ing time is set to 1/32 of a cycle.
SET
A
1
0
1
1
0
1
1
1
1
1
0
1
0
0
1
0
(15/16 to 1/16 on MAX7221). Table 7 lists the
B
1
1
1
1
1
0
0
1
1
1
0
0
1
0
1
0
ON SEGMENTS = 1
C
1
1
0
1
1
1
1
1
1
1
0
0
1
0
0
0
and Interdigit Blanking
D
1
0
1
1
0
1
1
0
1
1
0
1
0
1
0
0
Intensity Control
E
1
0
1
0
0
0
1
0
1
0
0
1
1
1
1
0
SET
) connected
F
1
0
0
0
1
1
1
0
1
1
0
1
1
1
1
0
G
0
0
1
1
1
1
1
0
1
1
1
1
1
0
1
0