MC14489BDWER2 Freescale, MC14489BDWER2 Datasheet - Page 16

• Manufacturer Part Number: MC14489BDWER2
• Manufacturer: Freescale

Specifications of MC14489BDWER2

• Operating Supply Voltage (typ): 5V
• Number Of Digits: 5
• Number Of Segments: 40
• Operating Temperature (min): -40C
• Operating Temperature (max): 130C
• Operating Temperature Classification: Automotive
• Package Type: SOIC W
• Pin Count: 20
• Mounting: Surface Mount
• Operating Supply Voltage (min): 4.5V
• Operating Supply Voltage (max): 5.5V
• Lead Free Status / RoHS Status: Compliant

* 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