NTE2024
Integrated Circuit
2Digit BCDto7Segment Decoder/Driver
Features:
D
Separate BCD inputs and segment outputs for each digit
D
Input loading less than 15
A
D
I
2
L logic with buffered inputs and outputs
D
Internal input overrange protection circuit
D
5V supply operation
D
Internal biasing circuits
D
Output drive capability of 25mA per segment
D
Open collector outputs drive indicators directly
Description:
The NTE2024 is a monolithic integrated circuit intended for 2digit display such as "numbers" for tV
and "CB" channel selection, and other 099 numerical or counting for consumer or industrial indicator
applications. It consists of two independent BCDto7 segment decoder/drivers. Two sets of BCD
inputs are buffered with pnp differential amplifier stages internally referenced to 1.7V. Each of the
eight input terminals draws less than 15
A and is provided with an internal protection circuit.
Decoding is accomplished with I
2
L ROM's. The fourteen output terminals are buffered with Darlington
pairs driving commonemitter output transistors. Each output is capable of sinking 25mA for an LED
commonanode display device. The supplyvoltage range (V
CC
) is intended to be 4.5V to 6V. The
output voltage (V
O
) must not exceed 12V, which provides for a wide range of commonanode voltage
sources.
Absolute Maximum Ratings:
Supply Voltage, V
CC
6V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
InputVoltage (Min/Max)
0.3V
CC
V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input Current (Protection Circuit)
10mA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output Voltage, V
O
12V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output Segment Current, I
Display
25mA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Dissipation (T
A
+70
C), P
D
400mW
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Derate Linearly Above +70
C 8.7mW/
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Ambient temperature Range, T
opr
0
to 70
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
StorageTemperature range, T
stg
55
to +150
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lead Temperature (During Soldering, 1/16"
1/32" from case, 10sec max), T
L
+265
C
. . . . . . . . . .
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