DM74S283N

DM74S283N Datasheet

DM74S283 4-Bit Binary Adder with Fast Carry

Part	Datasheet
DM74S283N	DM74S283N (pdf)

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DM74S283 4-Bit Binary Adder with Fast Carry DM74S283 4-Bit Binary Adder with Fast Carry 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 lookahead 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. s Full-carry look-ahead across the four bits s Systems achieve partial look-ahead performance with the economy of ripple carry s Typical add times Two 8-bit words 15 ns Two 16-bit words 30 ns s Typical power dissipation 510 mW Ordering Code: Order Number Package Number Package Description DM74S283N N16E 16-Lead Plastic Dual-In-Line Package PDIP , JEDEC MS-001, Wide Connection Diagram 2000 Fairchild Semiconductor Corporation DS006484 DM74S283 Function Table H = HIGH Level, L = LOW Level Note Input conditions at A1, B1, A2, B2, and C0 are used to determine outputs and the value of the internal carry C2. The values at C2, A3, B3, A4, and B4 are then used to determine outputs and C4. Logic Diagram DM74S283 Absolute Maximum Ratings Note 1 Supply Voltage Input Voltage 5.5V Operating Free Air Temperature Range 0°C to +70°C Storage Temperature Range −65°C to +150°C 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 Symbol VCC VIH VIL IOH Parameter Supply Voltage HIGH Level Input Voltage LOW Level Input Voltage HIGH Level Output Current Output C4 HIGH Level Output Current Other Outputs LOW Level Output Current Output C4 LOW Level Output Current Other Outputs Free Air Operating Temperature Nom 5 Electrical Characteristics over recommended operating free air temperature unless otherwise noted Parameter Conditions Input Clamp Voltage VCC = Min, II = −18 mA HIGH Level VCC = Min, IOH = Max Output Voltage VIL = Max, VIH = Min LOW Level VCC = Min, IOL = Max Output Voltage VIH = Min, VIL = Max Input Current Max Input Voltage VCC = Max, VI = 5.5V HIGH Level Input Current

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DM74S283 4-Bit Binary Adder with Fast Carry

DM74S283 4-Bit Binary Adder with Fast Carry

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 lookahead 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.
s Full-carry look-ahead across the four bits s Systems achieve partial look-ahead performance with
the economy of ripple carry s Typical add times

Two 8-bit words 15 ns Two 16-bit words 30 ns s Typical power dissipation 510 mW
Ordering Code:

Order Number Package Number

Package Description

DM74S283N

N16E
16-Lead Plastic Dual-In-Line Package PDIP , JEDEC MS-001, Wide

Connection Diagram
2000 Fairchild Semiconductor Corporation DS006484

DM74S283

Function Table

H = HIGH Level, L = LOW Level Note Input conditions at A1, B1, A2, B2, and C0 are used to determine outputs and the value of the internal carry C2. The values at C2, A3, B3, A4, and B4 are then used to determine outputs and C4.

Logic Diagram

DM74S283

Absolute Maximum Ratings Note 1

Supply Voltage

Input Voltage
5.5V

Operating Free Air Temperature Range 0°C to +70°C

Storage Temperature Range
−65°C to +150°C

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

Symbol VCC VIH VIL IOH

Parameter Supply Voltage HIGH Level Input Voltage LOW Level Input Voltage HIGH Level Output Current Output C4 HIGH Level Output Current Other Outputs LOW Level Output Current Output C4 LOW Level Output Current Other Outputs Free Air Operating Temperature

Nom 5

Electrical Characteristics
over recommended operating free air temperature unless otherwise noted

Parameter

Conditions

Input Clamp Voltage

VCC = Min, II = −18 mA

HIGH Level

VCC = Min, IOH = Max

Output Voltage

VIL = Max, VIH = Min

LOW Level

VCC = Min, IOL = Max

Output Voltage

VIH = Min, VIL = Max

Input Current Max Input Voltage VCC = Max, VI = 5.5V

HIGH Level Input Current

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Datasheet ID: DM74S283N 513842