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PDF M5480B7 Data sheet ( Hoja de datos )

Número de pieza M5480B7
Descripción LED DISPLAY DRIVER
Fabricantes ST Microelectronics 
Logotipo ST Microelectronics Logotipo



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No Preview Available ! M5480B7 Hoja de datos, Descripción, Manual

. 3 1/2 DIGIT LED DRIVER (23 segments)
. CURRENT GENERATOR OUTPUTS (no re-
sistors required)
. CONTINUOUS BRIGHTNESS CONTROL
. SERIAL DATA INPUT
. NO LOAD SIGNAL REQUIRED
. WIDE SUPPLY VOLTAGE OPERATION
. TTL COMPATIBILITY
....Applications examples
MICROPROCESSOR DISPLAYS
INDUSTRIAL CONTROL INDICATION
RELAY DRIVER
INSTRUMENTATION READOUTS
DESCRIPTION
The M5480 is a monolithic MOS integrated circuit
produced with a N-channel silicon gate technology.
It utilizes the M5451 die packaged in a 28-pin
plas-tic package making it ideal for a 3 1/2 digit
dispaly. Asingle pin controls the LED dispaly bright-
ness by setting a reference current through a vari-
able resistor connected either to VDD or to a
separate supply of 13.2V maximum.
The M5480 is a pin-to-pin replacement of the NS
MM 5480.
PIN CONNECTIONS
VSS
OUTPUT BIT 11
OUTPUT BIT 10
OUTPUT BIT 9
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
11
12
13
14
May 1993
M5480
LED DISPLAY DRIVER
DIP-28
(Plastic Package)
ORDER CODE : M5480B7
28 OUTPUT BIT 12
27 OUTPUT BIT 13
26 OUTPUT BIT 14
25 OUTPUT BIT 15
24 OUTPUT BIT 16
23 OUTPUT BIT 17
22 OUTPUT BIT 18
21 OUTPUT BIT 19
20 OUTPUT BIT 20
19 OUTPUT BIT 21
18 OUTPUT BIT 22
17 OUTPUT BIT 23
16 DATA IN
15 CLOCK IN
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M5480B7 pdf
M5480
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.
b) +V C
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 depends, in a
first approximation, only on the number of seg-
ments 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

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