MC14489P Freescale Semiconductor, Inc, MC14489P Datasheet

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MC14489P

Manufacturer Part Number
MC14489P
Description
Manufacturer
Freescale Semiconductor, Inc
Datasheet

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MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
Multi-Character
LED Display/Lamp Driver
CMOS
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.
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.
WIRE
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.
BitGrabber is a trademark of Motorola Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
REV 3
10/95
MOTOROLA
The MC14489 is a flexible light–emitting–diode driver which directly
A single device can drive any one of the following: a 5–digit display plus
The MC14489 is compatible with the Motorola SPI and National MICRO-
Motorola, Inc. 1995
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 N
serial data ports. The chip’s patented BitGrabber
EURON
registers augment
C
HIP
20
ENABLE
BANK 1
1
ORDERING INFORMATION
MC14489P
MC14489DW
20
V DD
MC14489
Rx
PIN ASSIGNMENT
e
d
c
b
a
f
1
1
2
3
4
5
6
7
8
9
10
Plastic DIP
SOG Package
Order this document
20
19
18
17
16
15
14
13
12
11
SOG PACKAGE
PLASTIC DIP
DW SUFFIX
CASE 751D
CASE 738
P SUFFIX
by MC14489/D
g
h
DATA OUT
BANK 5
BANK 4
BANK 3
V SS
BANK 2
DATA IN
CLOCK
MC14489
1

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MC14489P Summary of contents

Page 1

... Using the MC68HC05B4 and the MC14489 and Engineering Bulletin EB153, Driving a Seven–Segment Display with the N BitGrabber is a trademark of Motorola Inc. MICROWIRE is a trademark of National Semiconductor Corp. REV 3 10/95 MOTOROLA Motorola, Inc. 1995 MC14489 ORDERING INFORMATION MC14489P MC14489DW PIN ASSIGNMENT registers augment BANK 1 ...

Page 2

DATA IN 11 CLOCK 10 ENABLE BitGrabber CONFIGURATION REGISTER 8 BITS OSCILLATOR AND POR CONTROL LOGIC 5 BANK SWITCHES (FETs BANK 1 BANK 2 BANK 3 BANK 4 BANK 5 MAXIMUM RATINGS* (Voltages Referenced ...

Page 3

ELECTRICAL CHARACTERISTICS (Voltages Referenced – 130 C* unless otherwise indicated) Symbol Parameter V DD Power Supply Voltage Range of LED Drive Circuitry V DD (stby) Minimum Standby Voltage V IL Maximum ...

Page 4

AC ELECTRICAL CHARACTERISTICS Symbol f clk Serial Data Clock Frequency, Single Device or Cascaded Devices NOTE: Refer to Clock t w below (Figure 1) t PLH , Maximum Propagation Delay, Clock to Data Out t PHL (Figures 1 and 5) ...

Page 5

CLOCK 50% 10 1/f clk t PLH t PHL 90% DATA OUT 50% 10% t TLH t THL Figure 1. VALID 50% DATA 50% CLOCK Figure ...

Page 6

PIN DESCRIPTIONS DIGITAL INTERFACE Data In (Pin 12) Serial Data Input. The bit stream begins with the MSB and is shifted in on the low–to–high transition of Clock. When the device is not cascaded, the bit pattern is either 1 ...

Page 7

Anode–Driver Current Sources. These outputs are close- ly–matched current sources which directly tie to the anodes of external discrete LEDs (lamps) or display segment LEDs. Each output is capable ...

Page 8

Ç Ç Ç Ç Ç Ç Ç Ç Ç Ç Ç Ç Ç Ç Ç Ç Ç Ç Ç Ç Ç Ç Ç Ç Ç Ç Ç Ç Ç Ç Ç Ç Ç Ç Ç Ç Ç Ç Ç Ç ...

Page 9

Table 1. Triple–Mode Segment Decoder Function Table Bank Nibble Value Binary MSB Hexadecimal $ ...

Page 10

1ST BYTE SHIFTED IN CONFIGURATION REGISTER OF DEVICE 2 IN FIGURE 11 D23 D22 D21 D20 D19 D18 D17 D16 D15 D14 D13 D12 D11 1ST BYTE SHIFTED IN h BITS BANK AND 5 DIMMER NIBBLE BIT ...

Page 11

OPTIONAL DATA OUT CMOS DATA IN MCU/MPU CLOCK ENABLE Figure 10. Non–Cascaded Application Example: 5 Character Common Cathode LED Display with Two Intensities as Controlled via Serial Port ...

Page 12

Figure 12. Bit Stream Formats for Three Devices Cascaded MC14489 12 MOTOROLA ...

Page 13

Figure 13. Bit Stream Formats for Four Devices Cascaded MOTOROLA MC14489 13 ...

Page 14

Figure 14. Bit Stream Formats for Five Devices Cascaded MC14489 14 MOTOROLA ...

Page 15

V CMOS MCU/MPU NOTE: R1 limits the maximum current to avoid damaging the display and/or the MC14489 due to overheating. See the Thermal Considerations section. An 1/8 watt resistor may be used for R1 ...

Page 16

MC14489 BANK 1 BANK 2 BANK 3 BANK 4 BANK 5 3 CMOS MCU/MPU * If required, this group of lamps can be independently controlled. To accomplish independent control, ...

Page 17

Figure 18. 4–Digit Display Plus Decimals with Four Annunciators Figure 19. Compact Display System with Three Components MOTOROLA BANK 1 BANK 5 TO BANK ...

Page 18

The MC14489 is designed to operate with a chip–junction temperature ( ranging from – 130 C, as indicated in the electrical characteristics tables. The ambient operating temperature range ( dependent ...

Page 19

Table 2. LED Lamp and Common–Cathode QT Optoelectronics Hewlett–Packard (HP), Components Group Industrial Electronic Engineers (IEE), Component Products Div. Purdy Electronics Corp., AND Product Line NOTE: Motorola cannot recommend one supplier over another - -T- SEATING PLANE E ...

Page 20

D 20X 0.010 (0.25 18X K Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee ...

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