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PDF MC14489P Data sheet ( Hoja de datos )
| Número de pieza | MC14489P | |
| Descripción | Multi-Character LED Display/Lamp Driver | |
| Fabricantes | Motorola Semiconductors | |
| Logotipo |  |
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MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
Multi-Character
LED Display/Lamp Driver
CMOS
The 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
Order this document
by MC14489/D
MC14489
P SUFFIX
PLASTIC DIP
CASE 738
20
1
20
1
DW SUFFIX
SOG PACKAGE
CASE 751D
ORDERING INFORMATION
MC14489P Plastic DIP
MC14489DW SOG Package
PIN ASSIGNMENT
f
e
VDD
d
c
b
a
Rx
BANK 1
ENABLE
1
2
3
4
5
6
7
8
9
10
20 g
19 h
18 DATA OUT
17 BANK 5
16 BANK 4
15 BANK 3
14 VSS
13 BANK 2
12 DATA IN
11 CLOCK
BitGrabber is a trademark of Motorola Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
REV 3
10/95
©MOMoTtoOroRla,OInLc.A1995
MC14489
1
1 page  
tf
90%
CLOCK 50%
10%
tw
1/fclk
DATA OUT
90%
50%
10%
tPLH
tTLH
tr
tw
tPHL
tTHL
Figure 1.
VDD
VSS
BANK
OUTPUT
50%
1/fR
Figure 2.
DATA IN
CLOCK
VALID
50%
tsu th
50%
Figure 3.
tw(L)
ENABLE 50%
VDD
VSS tsu
th
VDD CLOCK
VSS
50%
FIRST
CLOCK
LAST
CLOCK
Figure 4.
tw(H)
trec
VDD
VSS
VDD
VSS
TEST POINT
DEVICE
UNDER
TEST
CL*
*Includes all probe and fixture capacitance.
Figure 5.
DEVICE
UNDER
TEST
VDD
TEST POINT
56 Ω
CL*
*Includes all probe and fixture capacitance.
Figure 6.
MOTOROLA
MC14489
5
5 Page 
+5V
CMOS
MCU/MPU
APPLICATIONS INFORMATION
+5V
MC14489
VDD
VSS
OPTIONAL
Rx
DATA OUT
Rx
a
b
c
d
e
f
g
h
DATA IN
CLOCK
ENABLE
BANK 5
BANK 4
BANK 3
BANK 2
BANK 1
8
8
•
#5
8
#4
8
#3
88
#2
a
fb
e gc
d
#1
Figure 10. Non–Cascaded Application Example: 5 Character Common Cathode
LED Display with Two Intensities as Controlled via Serial Port
CMOS
MCU/MPU
a TO h
BANK 1
TO
BANK 5
MC14489 #1
DATA
IN
CLOCK
DATA
ENABLE OUT
a TO h
BANK 1
TO
BANK 5
MC14489 #2
DATA
IN
CLOCK
DATA
ENABLE OUT
OPTIONAL
Figure 11. Cascading Two Devices
MOTOROLA
MC14489
11
11 Page | ||
| Páginas | Total 20 Páginas | |
| PDF Descargar | [ Datasheet MC14489P.PDF ] | |
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