74LS83

SN54LS83A MOTOROLA | Alldatasheet

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Technical content

The SN54 /74LS83A is a high-speed 4-Bit binary Full Adder with internal carry lookahead. It accepts two 4-bit binary words (A1–A 4, B1–B 4) and a Carry Input (C0). It generates the binary Sum outputs ∑ 1–∑ 4) and the Carry Output (C4) from the most significant bit. The LS83A operates with either active HIGH or active LOW operands (positive or negative logic). The SN54/74LS283 is recommended for new designs since it is identical in function with this device and features standard corner power pins. 14 13 12 11 10 9 1 2 3 4 5 6 16 15 Σ4 C 4 C 0 GND B 1 A1 Σ1 A4 Σ3 A3 Σ2 B2 A2 CONNECTION DIAGRAM DIP (TOP VIEW) B3 VCC NOTE: The Flatpak version has the same pinouts (Connection Diagram) as the Dual In-Line Package. PIN NAMES LOADING (Note a) HIGH LOW A1–A 4 B1–B 4 C 0 Σ1–Σ4 C 4 Operand A Inputs Operand B Inputs Carry Input Sum Outputs (Note b) Carry Output (Note b) 1.0 U.L. 1.0 U.L. 0.5 U.L. 10 U.L. 10 U.L. 0.5 U.L. 0.5 U.L. 0.25 U.L. 5 (2.5) U.L. 5 (2.5) U.L. NOTES: a) 1 TTL Unit Load (U.L.) = 40 µA HIGH/1.6 mA LOW. Temperature Ranges. SN54/74LS83A 4-BIT BINARY FULL ADDER WITH FAST CARRY LOW POWER SCHOTTKY J SUFFIX CERAMIC CASE 620-09 N SUFFIX PLASTIC CASE 648-08

ORDERING INFORMATION

∑ 1∑ 2 ∑ 3∑ 4 C 4 LOGIC DIAGRAM VCC = PIN 5 GND = PIN 12 = PIN NUMBERS C 1 C 2 C 3 C 0 A1 B1 A2 B2 A3 B3 A4 B4 C 4∑ 1 ∑ 2 ∑ 3 ∑ 4 3 410 11 161 13 8

The LS83A adds two 4-bit binary words (A plus B) plus the incoming carry. The binary sum appears on the sum outputs (∑ 1–∑ 4) and outgoing carry (C4) outputs. Where: (+) = plus Due to the symmetry of the binary add function the LS83A can be used with either all inputs and outputs active HIGH (positive logic) or with all inputs and outputs active LOW (negative logic). Note that with active HIGH Inputs, Carry Input can not be left open, but must be held LOW when no carry in is intended. Example: C 0 A1 A2 A3 A4 B1 B2 B3 B4 ∑ 1 ∑ 2 ∑ 3 ∑ 4 C 4 Logic Levels L L H L H H L L H H H L L H Active HIGH 0 0 1 0 1 1 0 0 1 1 1 0 0 1 (10+9 = 19) Active LOW 1 1 0 1 0 0 1 1 0 0 0 1 1 0 (carry+5+6 = 12) Interchanging inputs of equal weight does not affect the operation, thus C0, A1, B1, can be arbitrarily assigned to pins 10, 11, 13, etc. FUNCTIONAL TRUTH TABLE C (n–1) An Bn ∑ n C n L L L L L L L H H L L H L H L L H H L H H L L H L H L H L H H H L L H H H H H H C 1 — C3 are generated internally C 0 — is an external input C 4 — is an output generated internally GUARANTEED OPERATING RANGES Symbol Parameter Min Typ Max Unit VCC Supply Voltage 54 4.5 4.75 5.0 5.0 5.5 5.25 V TA Operating Ambient T emperature Range 54 –55 125 IOH Output Current — High 54, 74 –0.4 mA IOL Output Current — Low 54 4.0 8.0 mA

DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified) Symbol Parameter Limits Unit Test ConditionsSymbol Parameter Min Typ Max Unit Test Conditions VIH Input HIGH Voltage 2.0 V Guaranteed Input HIGH Voltage for All Inputs VIL Input LOW Voltage 54 0.7 V Guaranteed Input LOW Voltage for All InputsVIL Input LOW Voltage 74 0.8 V Guaranteed Input LOW Voltage for All Inputs VIK Input Clamp Diode Voltage –0.65 –1.5 V VCC = MIN, IIN = –18 mA VOH Output HIGH Voltage 54 2.5 3.5 V VCC = MIN, IOH = MAX, VIN = VIH per Truth TableVOH Output HIGH Voltage 54 2.5 3.5 V VCC = MIN, IOH = MAX, VIN = VIH per Truth TableVOH Output HIGH Voltage 74 2.7 3.5 V VCC = MIN, IOH = MAX, VIN = VIH per Truth Table VOL Output LOW Voltage 54, 74 0.25 0.4 V IOL = 4.0 mA VCC = VCC MIN, VIN = VIL or VIH per Truth Table VOL Output LOW Voltage 74 0.35 0.5 V IOL = 8.0 mA VIN = VIL or VIH per Truth Table IIH Input HIGH Current C 0 A or B µA VCC = MAX, VIN = 2.7 V IIH C 0 A or B 0.1 0.2 mA VCC = MAX, VIN = 7.0 V IIL Input LOW Current C 0 A or B –0.4 –0.8 mA VCC = MAX, VIN = 0.4 V IOS Output Short Circuit Current (Note 1)–20 –100 mA VCC = MAX ICC Power Supply Current All Inputs Grounded All Inputs at 4.5 V, Except B All Inputs at 4.5 V mA VCC = MAX Note 1: Not more than one output should be shorted at a time, nor for more than 1 second. AC CHARACTERISTICS (TA = 25°C) Symbol Parameter Limits Unit Test ConditionsSymbol Parameter Min Typ Max Unit Test Conditions tPLH tPHL Propagation Delay, C0 Input to any Σ Output ns VCC = 5.0 V C L = 15 pF Figures 1 and 2 tPLH tPHL Propagation Delay, Any A or B Input to Σ Outputs ns VCC = 5.0 V C L = 15 pF Figures 1 and 2tPLH tPHL Propagation Delay, C0 Input to C4 Output ns C L = 15 pF Figures 1 and 2 tPLH tPHL Propagation Delay, Any A or B Input to C4 Output ns Figure 1 Figure 2 AC WAVEFORMS VIN VOUT 1.3 V tPHL 1.3 V 1.3 V 1.3 V tPLH VIN VOUT 1.3 V tPLH 1.3 V 1.3 V 1.3 V tPHL