AN874 Datasheet, PDF (1/6 Pages) Maxim Integrated Products – Using the MAX6950 and the MAX6951 LED Display Drivers with Multiplex Dual-Digit Displays

DISPLAY DRIVERS
Apr 01, 2002
Using the MAX6950 and the MAX6951 LED Display
Drivers with Multiplex Dual-Digit Displays
This application note discusses how to connect the MAX6950 (5 digit) and
MAX6951 (8 digit) 7-segment LED display drivers to multiplex dual digit LED
displays instead of regular single digit 7 segment displays.
This application note discusses how to connect the MAX6950 and MAX6951 7-segment LED display
drivers to multiplex type (internally communed) dual digit displays, instead of regular single digit
displays.
The MAX6950 and MAX6951 are five-digit and eight-digit common-cathode LED display drivers that
use an unusual multiplexing scheme. This multiplexing scheme minimizes the connections between the
driver and the LED display, but requires the segment connections to be different to each of the five
(MAX6950) or eight (MAX6951) digits (Table 1).
Table 1. Standard Driver Connections to Single-Digit Displays
DIG0/SEG0
Pin 6
DIG1/SEG1
Pin 5
DIG2/SEG2
Pin 4
DIG3/SEG3
Pin 3
DIG4/SEG4
Pin 14
DIG5/SEG5
Pin 13
DIG6/SEG6
Pin 12
DIG7/SEG7
Pin 11
SEG8
Pin
10
LED
Digit
0
CC 0
SEG dp SEG g
SEG f
SEG e
SEG d
SEG c
SEG b
SEG
a
LED
Digit SEG dp
1
CC1
SEG g
SEG f
SEG e
SEG d
SEG c
SEG b
SEG
a
LED
Digit SEG dp
2
SEG g
CC2
SEG f
SEG e
SEG d
SEG c
SEG b
SEG
a
LED
Digit SEG dp
3
SEG g
SEG f
CC3
SEG e
SEG d
SEG c
SEG b
SEG
a
LED
Digit SEG dp
4
SEG g
SEG f
SEG e
CC4
SEG d
SEG c
SEG b
SEG
a
LED
Digit SEG dp
5*
SEG g
SEG f
SEG e
SEG d
CC5
SEG c
SEG b
SEG
a