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PDF M5481 Data sheet ( Hoja de datos )
| Número de pieza | M5481 | |
| Descripción | LED DISPLAY DRIVER | |
| Fabricantes | ST Microelectronics | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de M5481 (archivo pdf) en la parte inferior de esta página. Total 8 Páginas | ||
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M5481
LED DISPLAY DRIVER
FEATURES
s 2 DIGIT LED DRIVER (14 segments)
s CURRENT GENERATOR OUTPUTS
registor required)
s CONTINUOU BRIGHTNESS CONTROL
s SERIAL DATA INPUT
s DATA ENABLE
s WIDE SUPPLY VOLTAGE OPERATION
s TLL COMPATIBILITY
s APPLICATION EXAMPLES
s MICROPROCESSOR DISPLAYS
s INDUSTRIAL CONTROL INDICATOR
s RELAY DRIVER
s INSTRUMENTATION READOUTS
(no
DESCRIPTION
The M5481 is a monolithic MOS integrated circuit
produced with a N-channel silicon gate technolo-
gy. It uses the M5450 die packaged in a 20-pin
plastic package copper frame, making it ideal for a
1-digit display. A single pin controls the LED dis-
play brightness by setting a reference current
through a variable resistor connected either to VDD
or to a separate supply of 13.2V maximum.
The M5481 is a pin-to-pin replacement of the NS
MM 5481.
PIN CONNECTIONS
Output Bit 8
Output Bit 7
Output Bit 6
Output Bit 5
Output Bit 4
Output Bit 3
Output Bit 2
Output Bit 1
Brightness Control
VDD
1
2
3
4
5
6
7
8
9
10
April 2000
DIP20
(Plastic package)
ORDER CODE: M5481 B7
20 Output Bit 9
19 Output Bit 9
18 Output Bit 9
17 Output Bit 9
16 Output Bit 9
15 VSS
14 Output Bit 9
13 Data Enable
12 Data In
11 Clock
Version 4.1
1/8
1
1 page  
5 - TYPICAL APPLICATION
BASIC electronically tuned TV system.
LED DISPLAY
M5481
14 SEGMENTS
M5481
DISPLAY DRIVER
KEYBOARD
PROCESSOR
PLL
SYNTHESIZER
6 - POWER DISSIPATION OF THE IC
The power dissipation of the IC can be limited us-
ing different configurations.
+V C
R
ID
VD
VOUT
In this application R must be chosen by taking into
account the worst operating conditions.
R is determined by the maximum number of seg-
ments activated.
R= -V----C-----–-----V----ND----M-M-----A-A---X-X---x--–--I--D-V----O-----M------I--N---
The worst case condition for the device is when
roughly half of the maximum number of segments
are activated.
It must be checked that the total power dissipation
does not exceed the absolute maximum ratings of
the device.
In critical cases more resistors can be used in con-
junction with groups of segments. In this case the
current variation in the single resistor is reduced
and Ptot limited.
5/8
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet M5481.PDF ] | |
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