FAIRCHILD DM7445

Revised February 2000
DM7445
BCD to Decimal Decoders/Drivers
General Description
Features
These BCD-to-decimal decoders/drivers consist of eight
inverters and ten, four-input NAND gates. The inverters are
connected in pairs to make BCD input data available for
decoding by the NAND gates. Full decoding of BCD input
logic ensures that all outputs remain OFF for all invalid
(10–15) binary input conditions. These decoders feature
high-performance, NPN output transistors designed for use
as indicator/relay drivers, or as open-collector logic-circuit
drivers. The high-breakdown output transistors are compatible for interfacing with most MOS integrated circuits.
■ Full decoding of input logic
■ 80 mA sink-current capability
■ All outputs are off for invalid BCD input conditions
Ordering Code:
Order Number
DM7445
Package Number
N16E
Package Description
16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Connection Diagram
© 2000 Fairchild Semiconductor Corporation
DS006517
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DM7445 BCD to Decimal Decoders/Drivers
September 1986
DM7445
Function Table
No.
Inputs
Outputs
D
C
B
A
0
1
2
3
4
5
6
7
8
9
0
L
L
L
L
L
H
H
H
H
H
H
H
H
H
1
L
L
L
H
H
L
H
H
H
H
H
H
H
H
2
L
L
H
L
H
H
L
H
H
H
H
H
H
H
3
L
L
H
H
H
H
H
L
H
H
H
H
H
H
4
L
H
L
L
H
H
H
H
L
H
H
H
H
H
5
L
H
L
H
H
H
H
H
H
L
H
H
H
H
6
L
H
H
L
H
H
H
H
H
H
L
H
H
H
7
L
H
H
H
H
H
H
H
H
H
H
L
H
H
8
H
L
L
L
H
H
H
H
H
H
H
H
L
H
9
H
L
L
H
H
H
H
H
H
H
H
H
H
L
I
H
L
H
L
H
H
H
H
H
H
H
H
H
H
N
H
L
H
H
H
H
H
H
H
H
H
H
H
H
V
H
H
L
L
H
H
H
H
H
H
H
H
H
H
A
H
H
L
H
H
H
H
H
H
H
H
H
H
H
L
H
H
H
L
H
H
H
H
H
H
H
H
H
H
I
H
H
H
H
H
H
H
H
H
H
H
H
H
H
D
H = HIGH Level (OFF)
L = LOW Level (ON)
Logic Diagram
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2
Supply Voltage
Note 1: The “Absolute Maximum Ratings” are those values beyond which
the safety of the device cannot be guaranteed. The device should not be
operated at these limits. The parametric values defined in the Electrical
Characteristics tables are not guaranteed at the absolute maximum ratings.
The “Recommended Operating Conditions” table will define the conditions
for actual device operation.
7V
Input Voltage
5.5V
Output Voltage
30V
0°C to +70°C
Operating Free Air Temperature Range
−65°C to +150°C
Storage Temperature Range
Recommended Operating Conditions
Symbol
Parameter
Min
Nom
Max
4.75
5
5.25
Units
VCC
Supply Voltage
VIH
HIGH Level Input Voltage
V
VIL
LOW Level Input Voltage
0.8
VOH
HIGH Level Output Voltage
30
V
IOL
LOW Level Output Current
20
mA
TA
Free Air Operating Temperature
70
°C
2
V
0
V
Electrical Characteristics
over recommended operating free air temperature range (unless otherwise noted)
Symbol
Parameter
Conditions
VI
Input Clamp Voltage
VCC = Min, II = −12 mA
ICEX
HIGH Level
VCC = Min, VO = 30V
Output Current
VIL = Max, VIH = Min
LOW Level
VCC = Min, IOL = Max
Output Voltage
VIH = Min, VIL = Max
VOL
Min
Typ
(Note 2)
Max
Units
−1.5
V
250
µA
0.2
0.4
0.5
0.9
V
IOL = 80 mA
VCC = Min
II
Input Current @ Max Input Voltage
VCC = Max, VI = 5.5V
1
IIH
HIGH Level Input Current
VCC = Max, VI = 2.4V
40
µA
IIL
LOW Level Input Current
VCC = Max, VI = 0.4V
−1.6
mA
ICC
Supply Current
VCC = Max (Note 3)
70
mA
43
mA
Note 2: All typicals are at VCC = 5V, TA = 25°C.
Note 3: ICC is measured with all inputs grounded and all outputs OPEN.
Switching Characteristics
at VCC = 5V and TA = 25°C
Symbol
tPLH
tPHL
Parameter
Conditions
Propagation Delay Time
CL = 15 pF
LOW-to-HIGH Level Output
RL = 100Ω
Propagation Delay Time
HIGH-to-LOW Level Output
3
Min
Max
Units
49.5
ns
49.5
ns
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DM7445
Absolute Maximum Ratings(Note 1)
DM7445 BCD to Decimal Decoders/Drivers
Physical Dimensions inches (millimeters) unless otherwise noted
16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Package Number N16E
Fairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and
Fairchild reserves the right at any time without notice to change said circuitry and specifications.
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FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT
DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD
SEMICONDUCTOR CORPORATION. As used herein:
2. A critical component in any component of a life support
device or system whose failure to perform can be reasonably expected to cause the failure of the life support
device or system, or to affect its safety or effectiveness.
1. Life support devices or systems are devices or systems
which, (a) are intended for surgical implant into the
body, or (b) support or sustain life, and (c) whose failure
to perform when properly used in accordance with
instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the
user.
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