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Package Cooled:DIP
Part Number: MC14489
Package Cooled: DIP
Description: The MC14489 is a flexible lightemittingdiode driver which directly interfaces to individual lamps, 7se...
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MC14489
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DataSheet
General Description
MC14489 General Description
The MC14489 is a flexible lightemittingdiode driver which directly interfaces to individual lamps, 7segment displays, or various combinations of both. LEDs wired with common cathodes are driven in a multiplexedby5 fashion. Communication with an MCU/MPU is established through a synchronous serial port. The MC14489 features data retention plus decode and scan circuitry, thus relieving processor overhead. A single, currentsetting resistor is the only ancillary component required.
A single device can drive any one of the following: a 5digit display plus decimals, a 41/2digit display plus decimals and sign, or 25 lamps. A special technique allows driving 5 1/2 digits; see Figure 16. A configuration register allows the drive capability to be partitioned off to suit many additional applications. The onchip decoder outputs 7segmentformat numerals 0 to 9, hexadecimal characters A to F, plus 15 letters and symbols.
The MC14489 is compatible with the Motorola SPI and National MICROWIRE E serial data ports. The chip's patented BitGrabberE registers augment the serial interface by allowing random access without steering or address bits. A 24bit transfer updates the display register. Changing the configuration register requires an 8bit transfer.
MC14489 Maximum Ratings
| CHARACTERISTIC |
SYMBOL |
Commercial |
UNIT |
| DC Supply Voltage |
VDD |
0.5 to + 6.0 |
V |
| DC Input Voltage |
Vin |
0.5 to VDD + 0.5 |
V |
| DC Output Voltage |
Vout |
0.5 to VDD + 0.5 |
V |
| DC Input Current - per Pin (Includes Pin 8) |
Iin |
± 15 |
mA |
| DC Output Current -Pins 1, 2, 4 7, 19, 20 Sourcing Sinking |
Iout |
40 10 |
mA |
| Pins 9, 13, 15, 16, 17 Sinking |
320 |
mA | |
| Pin 18 |
± 15 |
mA | |
| DC Supply Current, VDD and VSS Pins |
IDD, ISS |
500 |
mW |
| Lead Temperature (8Second Soldering) |
TL |
260 |
°C |
| Device Thermal Resistance, JunctiontoAmbient (see Thermal Considerations section) Plastic DIP SOG Package |
RqJA |
90 100 |
°C/W |
| Storage Temperature |
Tstg |
-65to150 |
|
| Lead Temperature, 1 mm from Case for 10 Seconds |
TL |
260 |
MC14489 Features
• Operating Voltage Range of Drive Circuitry: 4.5 to 6 V
• Operating Junction Temperature Range: 40° to 130°C
• Current Sources Controlled by Single Resistor Provide Anode Drive
• LowResistance FET Switches Provide Direct Common Cathode Interface
• LowPower Mode (Extinguishes the LEDs) and Brightness Controlled via Serial Port
• Special Circuitry Minimizes EMI when Display is Driven and Eliminates EMI in LowPower Mode
• PowerOn Reset (POR) Blanks the Display on PowerUp, Independent of Supply Ramp Up Time
• May Be Used with DoubleHeterojunction LEDs for Optimum Efficiency
• Chip Complexity: 4300 Elements (FETs, Resistors, Capacitors, etc.)
• See Application Note AN431, Temperature Measurement and Display Using the MC68HC05B4 and the MC14489 and Engineering Bulletin
• Operating Junction Temperature Range: 40° to 130°C
• Current Sources Controlled by Single Resistor Provide Anode Drive
• LowResistance FET Switches Provide Direct Common Cathode Interface
• LowPower Mode (Extinguishes the LEDs) and Brightness Controlled via Serial Port
• Special Circuitry Minimizes EMI when Display is Driven and Eliminates EMI in LowPower Mode
• PowerOn Reset (POR) Blanks the Display on PowerUp, Independent of Supply Ramp Up Time
• May Be Used with DoubleHeterojunction LEDs for Optimum Efficiency
• Chip Complexity: 4300 Elements (FETs, Resistors, Capacitors, etc.)
• See Application Note AN431, Temperature Measurement and Display Using the MC68HC05B4 and the MC14489 and Engineering Bulletin
MC14489 Connection Diagram
MC14489
PDF/DataSheet Download
- Datasheet: MC14489
- File Size: 758537 KB
- Manufacturer: Motorola
- Click here to Download
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