MC14489DW ,Multi-Character LED Display/Lamp DriverMAXIMUM RATINGS* (Voltages Referenced to V )SSÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ..
MC14489P ,Multi-Character LED Display/Lamp DriverMAXIMUM RATINGS* (Voltages Referenced to V )SSÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ..
MC14490 ,Hex Bounce EliminatorMC14490Hex Contact BounceEliminatorThe MC14490 is constructed with complementary MOSenhancement mod ..
MC14490DW ,Hex Bounce Eliminatorcontacts. The digital contact bounce eliminator circuit takes an inputsignal from a bouncing contac ..
MC14490DWR2 ,Hex Bounce EliminatorBLOCK DIAGRAM+VDDDATA15 Aout1/2-BITA 1 4-BIT STATIC SHIFT REGISTERinDELAYSHIFT LOADV = PIN 16OSCI ..
MC14490DWR2G , Hex Contact Bounce Eliminator
MC68HC705B5FN ,8-bit single chip microcomputer, 6K bytes EPROM, self-check replaced by bootstrap firmware, no EEPROMELECTRICAL SPECIFICATIONS11MECHANICAL DATA12ORDERING INFORMATION13APPENDICES14HIGH SPEED OPERATION1 ..
MC68HC705C4A ,MC68HC705C4A, MC68HSC705C4A HCMOS Microcontroller Unit Technical Data
MC68HC705C4ACFB ,Microcontrollers
MC68HC705C4ACFB ,Microcontrollers
MC68HC705C4ACFN ,Microcontrollers
MC68HC705C4ACFN ,Microcontrollers
MC14489DW-MC14489P
Multi-Character LED Display/Lamp Driver
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CMOSThe MC14489 is a flexible light–emitting–diode driver which directly
interfaces to individual lamps, 7–segment displays, or various combinations of
both. LEDs wired with common cathodes are driven in a multiplexed–by–5
fashion. Communication with an MCU/MPU is established through a synchro-
nous serial port. The MC14489 features data retention plus decode and scan
circuitry, thus relieving processor overhead. A single, current–setting resistor is
the only ancillary component required.
A single device can drive any one of the following: a 5–digit display plus
decimals, a 4–1/2–digit 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 on–chip decoder outputs 7–segment–format numerals 0 to 9,
hexadecimal characters A to F, plus 15 letters and symbols.
The MC14489 is compatible with the Motorola SPI and National MICRO-
WIRE serial data ports. The chip’s patented BitGrabber registers augment
the serial interface by allowing random access without steering or address bits.
A 24–bit transfer updates the display register. Changing the configuration
register requires an 8–bit transfer. 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 Low–Resistance FET Switches Provide Direct Common Cathode Interface Low–Power Mode (Extinguishes the LEDs) and Brightness Controlled via
Serial Port Special Circuitry Minimizes EMI when Display is Driven and Eliminates
EMI in Low–Power Mode Power–On Reset (POR) Blanks the Display on Power–Up, Independent of
Supply Ramp Up Time May Be Used with Double–Heterojunction 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
EB153, Driving a Seven–Segment Display with the NEURON CHIP
BitGrabber is a trademark of Motorola Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
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by MC14489/D-
SEMICONDUCTOR TECHNICAL DATA
