S e ria lly In t e rfa c e d , 8 -Dig it LED Dis p la y Drive rs
AND2307SLC
ANODE DP
AND2307SLC
ANODE DP
5
7
9
5
7
9
ANODE A
ANODE F
ANODE B
ANODE G
ANODE A
ANODE F
ANODE B
ANODE G
6
6
10
10
4
2
3
4
2
3
ANODE C
ANODE E
ANODE D
ANODE C
ANODE E
ANODE D
1N5524B
5.6V ±5%
CATHODE
8
CATHODE
8
9/MAX721
23
SEG D
SEG E
21
20
SEG C
SEG G
17
16
5V
SEG B
SEG F
MAX7219
MAX7221
19
18
15
14
22
V+
4.7k
4.7k
SEG A
30k
SEG DP
16
4
9
GND
GND
I
SFT
4
7
NC1
NC2
3
*
2
*
COM1
IRF540
1
10
2
1
12
13
DIG 0
DIG 1
DATA IN
DIN
IN1
IN2
NO1
MAX394
11
8
LOAD (CS)
LOAD (CS)
CLK
COM2
CLOCK
9
NO2
5
IRF540
*4.7kΩ PULL-UP REQUIRED FOR MAX7221
( ) MAX7221 ONLY
-5V
Figure 2. MAX7219/MAX7221 Driving 2.3-Inch Displays
12 ______________________________________________________________________________________
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
