mc14489 Freescale Semiconductor, Inc, mc14489 Datasheet - Page 15

• Manufacturer Part Number: mc14489
• Description: Multi-character Display/lamp Driver
• Manufacturer: Freescale Semiconductor, Inc

MOTOROLA
NOTE: A Universal Overflow pins out all anodes and cathodes.
USE TO DRIVE LAMP
NOTE: R1 limits the maximum current to avoid damaging the display and/or the MC14489
MCU/MPU
Figure 15. Common–Cathode LED Display with Dial–Adjusted Brightness
OR MINUS SIGN
CMOS
+ 5 V
due to overheating. See the Thermal Considerations section. An 1/8 watt resistor
may be used for R1. R2 is a 1 k or 5 k potentiometer ( 1/8 watt). R2 may be a
light–sensitive resistor.
UNIVERSAL OVERFLOW
(“1” OR “HALF–DIGIT”)
Figure 16. Driving 5 1/2 Digits
8
h
LED DISPLAY
MC14489
INPUT LINES
MC14489
5
1
V DD
V SS
3
Rx
BANK OUTPUTS
2
5–DIGIT DISPLAY
3
4
+ 5 V
5
R1
R2
a TO g
7
MC14489
15