M5481B7 STMicroelectronics, M5481B7 Datasheet - Page 5

• Manufacturer Part Number: M5481B7
• Description: IC LED DISPLAY DRIVER 20-PDIP
• Manufacturer: STMicroelectronics

Specifications of M5481B7

• Display Type: LED
• Configuration: 7 Segment
• Interface: Serial
• Digits Or Characters: 2 Digits
• Current - Supply: 7mA
• Voltage - Supply: 4.5 V ~ 13.2 V
• Operating Temperature: -25°C ~ 85°C
• Mounting Type: Through Hole
• Package / Case: 20-DIP (0.300", 7.62mm)
• Number Of Digits: 2
• Number Of Segments: 14
• Operating Supply Voltage: 4.5 V to 13.2 V
• Maximum Supply Current: 7 mA
• Maximum Power Dissipation: 1.5 W
• Maximum Operating Temperature: + 85 C
• Mounting Style: Through Hole
• Minimum Operating Temperature: - 25 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

TYPICAL APPLICATION
Figure 6. BASIC electronically tuned TV system
POWER DISSIPATION OF THE IC
The power dissipation of the IC can be limited us-
ing different configurations.
Figure 7.
V
OUT
V
D
R
+V
C
I
D
KEYBOARD
DISPLAY DRIVER
LED DISPLAY
14 SEGMENTS
PROCESSOR
M5481
In this application R must be chosen taking into ac-
count the worst operating conditions.
R is determined by the maximum number of seg-
ments activated.
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 P
tot
limited.
R
=
SYNTHESIZER
V
----------------------------------------------------------------
C
–
PLL
V
DMAX
N
MAX
L
–
D
V
OMIN
M5481
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