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DM74145N

Part # DM74145N
Description IC DECODER/DRVR BCD-DEC 16-DIP
Category IC
Availability In Stock
Qty 2
Qty Price
1 + $0.59090
Manufacturer Available Qty
National Semiconductor Corp
Date Code: 9042
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Technical Document


DISCLAIMER: The information provided herein is solely for informational purposes. Customers must be aware of the suitability of this product for their application, and consider that variable factors such as Manufacturer, Product Category, Date Codes, Pictures and Descriptions may differ from available inventory.

© 2000 Fairchild Semiconductor Corporation DS006544 www.fairchildsemi.com
September 1986
Revised February 2000
DM74145 BCD to Decimal Decoders/Drivers
DM74145
BCD to Decimal Decoders/Drivers
General Description
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 com-
patible for interfacing with most MOS integrated circuits.
Features
Full decoding of input logic
80 mA sink-current capability
All outputs are OFF for invalid BCD input conditions
Ordering Code:
Connection Diagram Function Table
H = HIGH Level (OFF)
L = LOW Level (ON)
Order Number Package Number Package Description
DM74145N N16E 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
No. Inputs Outputs
DCBA0123456789
0 LLLLLHHHHHHHHH
1 LLLHHLHHHHHHHH
2 LLHLHHLHHHHHHH
3 LLHHHHHLHHHHHH
4 LHLLHHHHLHHHHH
5 LHLHHHHHHLHHHH
6 LHHLHHHHHHLHHH
7 LHHHHHHHHHHLHH
8 HLLLHHHHHHHHLH
9 HLLHHHHHHHHHHL
I HLHLHHHHHHHHHH
N HLHHHHHHHHHHHH
V HHL LHHHHHHHHHH
A HHLHHHHHHHHHHH
L HHHLHHHHHHHHHH
I HHHHHHHHHHHHHH
D
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DM74145
Logic Diagram
3 www.fairchildsemi.com
DM74145
Absolute Maximum Ratings(Note 1)
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.
Recommended Operating Conditions
Electrical Characteristics
over recommended operating free air temperature range (unless otherwise noted)
Note 2: All typicals are at V
CC
= 5V, T
A
= 25°C.
Note 3: I
CC
is measured with all outputs open and all inputs grounded.
Switching Characteristics
at V
CC
= 5V and T
A
= 25°C
Supply Voltage 7V
Input Voltage 5.5V
Operating Free Air Temperature Range 0°C to +70°C
Storage Temperature Range 65°C to +150°C
Symbol Parameter Min Nom Max Units
V
CC
Supply Voltage 4.75 5 5.25 V
V
IH
HIGH Level Input Voltage 2 V
V
IL
LOW Level Input Voltage 0.8 V
V
OH
HIGH Level Output Voltage 15 V
I
OL
LOW Level Output Current 20 mA
T
A
Free Air Operating Temperature 0 70 °C
Symbol Parameter Conditions Min
Typ
Max Units
(Note 2)
V
I
Input Clamp Voltage V
CC
= Min, I
I
= 12 mA 1.5 V
I
CEX
HIGH Level V
CC
= Min, V
OH
= Max
250 µA
Output Current V
IL
= Max, V
IH
= Min
V
OL
LOW Level V
CC
= Min, I
OL
= Max
0.4
Output Voltage V
IH
= Min, V
IL
= Max
V
I
OL
= 80 mA
0.5 0.9
V
CC
= Min
I
I
Input Current @ Max Input Voltage V
CC
= Max, V
I
= 5.5V 1 mA
I
IH
HIGH Level Input Current V
CC
= Max, V
I
= 2.4V 40 µA
I
IL
LOW Level Input Current V
CC
= Max, V
I
= 0.4V 1.6 mA
I
CC
Supply Current V
CC
= Max (Note 3) 43 70 mA
Symbol Parameter Conditions Min Max Units
t
PLH
Propagation Delay Time C
L
= 15 pF
30 ns
LOW-to-HIGH Level Output R
L
= 100
t
PHL
Propagation Delay Time
30 ns
HIGH-to-LOW Level Output
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