MC14489BDW Freescale Semiconductor, MC14489BDW Datasheet - Page 16

• Manufacturer Part Number: MC14489BDW
• Description: IC DRIVER LED/LAMP 5CH 20-SOIC
• Manufacturer: Freescale Semiconductor

Specifications of MC14489BDW

• Display Type: LED
• Configuration: 7 Segment
• Interface: Serial
• Current - Supply: 5.5mA
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: -40°C ~ 130°C
• Mounting Type: Surface Mount
• Package / Case: 20-SOIC (7.5mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Digits Or Characters: -

* N = number of devices that are cascaded. For example, to drive 10 digits, 2 devices are cascaded; therefore, N = 2. To drive 35 digits, seven
MC14489B
16
If 3N is a Multiple of 4
If 3N – 1 is a Multiple of 4
If 3N – 2 is a Multiple of 4
If 3N – 3 is a Multiple of 4
devices are cascaded; therefore N = 7.
C i
Criteria*
i *
NOTE: R1 limits the maximum current to avoid damaging the display and/or the MC14489B
MCU/MPU
Figure 15. Common–Cathode LED Display with Dial–Adjusted Brightness
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.
Table 2. Register Access for Two or More Cascaded Devices
Total Number of Bytes
3N – 1
3N – 2
3N – 2
Configuration Register Access
3N
8
LED DISPLAY
MC14489B
Number of Leading
“Don’t Care” Bytes
2
1
0
0
5
V DD
V SS
Rx
Total Number of Bytes
3N + 2
3N + 1
+ 5 V
3N
3N
Display Register Access
R1
R2
Number of Leading
“Don’t Care” Bytes
MOTOROLA
2
1
0
0