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PDF M5482 Data sheet ( Hoja de datos )
| Número de pieza | M5482 | |
| Descripción | LED DISPLAY DRIVER | |
| Fabricantes | ST Microelectronics | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de M5482 (archivo pdf) en la parte inferior de esta página. Total 6 Páginas | ||
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. 2 DIGIT LED DRIVER (15 segments)
. CURRENT GENERATOR OUTPUTS (no re-
sistor required)
. CONTINUOUS BRIGHTNESS CONTROL
. SERIAL DATA INPUT
. WIDE SUPPLY VOLTAGE OPERATION
. TTL COMPATIBILITY
....Application Examples
MICROPROCESSOR DISPLAYS
INDUSTRIAL CONTROL INDICATOR
RELAY DRIVER
INSTRUMENTATION READOUTS
DESCRIPTION
The M5482 is a monolithic MOS integrated circuit
produced with an N-channel silicon gate technol-
ogy. It utilizes the M5451 die packaged in a 20-pin
plastic package copper frame, making it ideal for a
2-digit display. A single pin controls the LED display
brightness by setting a reference current through a
variable resistor connected either to VDD or to a
separate supply of 13.2V maximum.
PIN CONNECTIONS
M5482
LED DISPLAY DRIVER
DIP20
(Plastic Package)
ORDER CODE : M5482B7
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
V DD
1
2
3
4
5
6
7
8
9
10
20 OUTPUT BIT 9
19 OUTPUT BIT 10
18 OUTPUT BIT 11
17 OUTPUT BIT 12
16 OUTPUT BIT 13
15 VSS
14 OUTPUT BIT 14
13 OUTPUT BIT 15
12 DATA IN
11 CLOCK
May 1993
1/6
1 page  
M5482
POWER DISSIPATION OF THE IC
The power dissipation of the IC can be limited using
different configurations.
a) +VC
b)
+V C
R
ID
VD
VOUT
In this application R must be chosen taking into
account the worst operating conditions.
R is determined by the maximum number of seg-
ments activated.
R
=
VC
−
VD MAX − VO
NMAX ⋅ ID
MIN
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
conjunction with groups of segments. In this case
the current variation in the single resistor is reduced
and Ptot limited.
In this configuration the drop on the serial con-
nected diodes is quite stable if the diodes are
properly chosen.
The total power dissipation of the IC is, in first
approximation, depending only on the number of
segments activated.
c) +VC
VOUT +VD
In this configuration VOUT + VDis constant. The total
power dissipation of the IC depends only on the
number of segments activated.
5/6
5 Page | ||
| Páginas | Total 6 Páginas | |
| PDF Descargar | [ Datasheet M5482.PDF ] | |
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