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DM74LS283N

Part # DM74LS283N
Description IC ADDER BINARY 4BIT 16-DIP
Category IC
Availability In Stock
Qty 40
Qty Price
1 + $0.64532
Manufacturer Available Qty
National Semiconductor Corp
Date Code: 7719
  • Shipping Freelance Stock: 20
    Ships Immediately
National Semiconductor Corp
Date Code: 7719
  • Shipping Freelance Stock: 20
    Ships Immediately



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 DS006421 www.fairchildsemi.com
August 1986
Revised March 2000
DM74LS283 4-Bit Binary Adder with Fast Carry
DM74LS283
4-Bit Binary Adder with Fast Carry
General Description
These full adders perform the addition of two 4-bit binary
numbers. The sum () outputs are provided for each bit
and the resultant carry (C4) is obtained from the fourth bit.
These adders feature full internal look ahead across all four
bits. This provides the system designer with partial look-
ahead performance at the economy and reduced package
count of a ripple-carry implementation.
The adder logic, including the carry, is implemented in its
true form meaning that the end-around carry can be
accomplished without the need for logic or level inversion.
Features
Full-carry look-ahead across the four bits
Systems achieve partial look-ahead performance with
the economy of ripple carry
Typical add times
Two 8-bit words 25 ns
Two 16-bit words 45 ns
Typical power dissipation per 4-bit adder 95 mW
Ordering Code:
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Connection Diagram
Order Number Package Number Package Description
DM74LS283M M16A 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow
DM74LS283N N16E 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
www.fairchildsemi.com 2
DM74LS283
Function Table
H = HIGH Level, L = LOW Level
Input conditions at A1, B1, A2, B2, and C0 are used to determine outputs 1 and 2 and the value of the internal carry C2.
The values at C2, A3, B3, A4, and B4 are then used to determine outputs 3, 4, and C4.
Logic Diagram
3 www.fairchildsemi.com
DM74LS283
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: Not more than one output should be shorted at a time, and the duration should not exceed one second.
Note 4: I
CC1
is measured with all outputs OPEN, all B inputs LOW and all other inputs at 4.5V, or all inputs at 4.5V.
Note 5: I
CC2
is measured with all outputs OPEN and all inputs GROUNDED.
Supply Voltage 7V
Input Voltage 7V
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
I
OH
HIGH Level Output Current 0.4 mA
I
OL
LOW Level Output Current 8 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
= 18 mA 1.5 V
V
OH
HIGH Level V
CC
= Min, I
OH
= Max
2.7 3.4 V
Output Voltage V
IL
= Max, V
IH
= Min
V
OL
LOW Level V
CC
= Min, I
OL
= Max
0.35 0.5
Output Voltage V
IL
= Max, V
IH
= Min V
I
OL
= 4 mA, V
CC
= Min 0.25 0.4
I
I
Input Current @ Max V
CC
= Max A, B 0.2
mA
Input Voltage V
I
= 7V C0 0.1
I
IH
HIGH Level V
CC
= Max A, B 40
µA
Input Current V
I
= 2.7V C0 20
I
IL
LOW Level V
CC
= Max A, B 0.8
mA
Input Current V
I
= 0.4V C0 0.4
I
OS
Short Circuit Output Current V
CC
= Max 20 100 mA
I
CC1
Supply Current V
CC
= Max (Note 4) 19 34 mA
I
CC2
Supply Current V
CC
= Max (Note 5) 22 39 mA
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