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MC14489P bảng dữ liệu(PDF) 1 Page - Motorola, Inc

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Giải thích chi tiết về linh kiện  Multi-Character LED Display/Lamp Driver
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nhà sản xuất  MOTOROLA [Motorola, Inc]
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MC14489P bảng dữ liệu(HTML) 1 Page - Motorola, Inc

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MC14489
MOTOROLA
1
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
BitGrabber is a trademark of Motorola Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
Order this document
by MC14489/D
MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
PIN ASSIGNMENT
MC14489
P SUFFIX
PLASTIC DIP
CASE 738
DW SUFFIX
SOG PACKAGE
CASE 751D
ORDERING INFORMATION
MC14489P
Plastic DIP
MC14489DW
SOG Package
b
d
VDD
e
f
ENABLE
BANK 1
Rx
a
c
5
4
3
2
1
10
9
8
7
6
14
15
16
17
18
19
20
11
12
13
BANK 4
BANK 5
DATA OUT
h
g
CLOCK
DATA IN
BANK 2
VSS
BANK 3
20
1
20
1
© Motorola, Inc. 1995
REV 3
10/95


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