CA3161.PDF

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CA3161
Semiconductor
CA3161
August 1997
BCD to Seven Segment Decoder/Driver
Features
Description
• TTL Compatible Input Logic Levels
The CA3161E is a monolithic integrated circuit that performs
the BCD to seven segment decoding function and features
constant current segment drivers. When used with the
CA3162E A/D Converter the CA3161E provides a complete
digital readout system with a minimum number of external
parts.
• 25mA (Typ) Constant Current Segment Outputs
• Eliminates Need for Output Current Limiting Resistors
• Pin Compatible with Other Industry Standard
Decoders
• Low Standby Power Dissipation . . . . . . . . 18mW (Typ)
Ordering Information
PART NUMBER
TEMP.
RANGE ( o C)
PACKAGE
PKG.
NO.
CA3161E
0 to 70
16 Ld PDIP
E16.3
Pinout
Functional Block Diagram
CA3161
(PDIP)
TOP VIEW
2 3
2 2
2 1
2 0
6
2
1
7
13
12
11
10
9
15
14
a
b
c
d
e
f
g
INPUT
BCD TO
7 SEGMENT
DECODER
CONSTANT
BUFFERS
CURRENT
SEGMENT
DRIVERS
2 1
2 2
NC
NC
NC
2 3
2 0
GND
1
2
3
4
5
16
V +
f
g
a
b
c
d
e
BIAS
15
CIRCUITRY
14
13
12
11
10
8
GND
16
6
V+
7
8
9
SEGMENT
a - g
a
f
b
g
e
c
d
SEGMENT DRIVER
SEGMENT
IDENTIFICATION
CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.
Copyright © Harris Corporation 1997
File Number 1079.3
9-5
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CA3161
Absolute Maximum Ratings
Thermal Information
DC V SUPPLY (Between Terminals 1 and 10) . . . . . . . . . . . . . . +7.0V
Input Voltage (Terminals 1, 2, 6, 7). . . . . . . . . . . . . . . . . . . . . . +5.5V
Output Voltage
Output “Off”. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +7V
Output “On” (Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +10V
q JA ( o C/W)
PDIP Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
Maximum Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . 150 o C
Maximum Storage Temperature Range . . . . . . . . . .-65 o C to 150 o C
Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . . 300 o C
Operating Conditions
Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . .0 o C to 75 o C
CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation
of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
NOTES:
1. This is the maximum output voltage for any single output. The output voltage must be consistent with the maximum dissipation and
derating curve for worst case conditions. Example: All segments “ON”, 100% duty cycle.
2.
q JA is measured with the component mounted on an evaluation PC board in free air.
Electrical Specifications T A = 25 o C
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNITS
V SUPPLY Operating Range, V +
4.5
5
5.5
V
Supply Current, l + (All Inputs High)
-
3.5
8
mA
Output Current Low (V O = 2V)
18
25
32
mA
Output Current High (V O = 5.5V)
-
-
250
m A
Input Voltage High (Logic “1” Level)
2
-
-
V
Input Voltage Low (Logic “0” Level)
-
-
0.8
V
Input Current High (Logic “1”)
2V
-30
-
-
m A
Input Current Low (Logic “0”)
0V
-40
-
-
m A
Propagation Delay Time,
t PHL
-
2.6
-
m s
t PLH
-
1.4
-
m s
9-6
Thermal Resistance (Typical, Note 2)
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CA3161
TRUTH TABLE
BINARY
STATE
INPUTS
OUTPUTS
2 3
2 2
2 1
2 0
a
b
c
d
e
f
g
DISPLAY
0
L
L
L
L
L
L
L
L
L
L
H
1
L
L
L
H
H
L
L
H
H
H
H
2
L
L
H
L
L
L
H
L
L
H
L
3
L
L
H
H
L
L
L
L
H
H
L
4
L
H
L
L
H
L
L
H
H
L
L
5
L
H
L
H
L
H
L
L
H
L
L
6
L
H
H
L
L
H
L
L
L
L
L
7
L
H
H
H
L
L
L
H
H
H
H
8
H
L
L
L
L
L
L
L
L
L
L
9
H
L
L
H
L
L
L
L
H
L
L
10
H
L
H
L
H
H
H
H
H
H
L
11
H
L
H
H
L
H
H
L
L
L
L
12
H
H
L
L
H
L
L
H
L
L
L
13
H
H
L
H
H
H
H
L
L
L
H
14
H
H
H
L
L
L
H
H
L
L
L
15
H
H
H
H
H
H
H
H
H
H
H
BLANK
9-7
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