Philips 74F283
The 74F283 adds two 4-bit binary words (An plus Bn) plus the incoming carry. The binary sum appears on the sum outputs (Σ0–Σ3) and the outgoing carry (COUT) according to the equation: CIN+20(A0+B0)+21(A1+B1)+22(A2+B2)+23(A3+B3) =Σ0+2Σ1+4Σ2+8Σ3+16COUT where (+)=plus Due to the symmetry of the binary add function, the 74F283 can be used with either all active-High operands (positive logic) or with all active-Low operands (negative logic). With active-High inputs, CIN cannot be left open; it must be held Low when no “carry in” is intended.| Part No. | 74F283 |
|---|---|
| Datasheet | 74F283 Download |
| Manufacturer |  Philips |
| Description | 4-bit binary full adder |
| Buy | Stock & Price |
FEATURES
● High speed 4-bit addition● Cascadable in 4-bit increments
● Fast Internal carry look-ahead
DESCRIPTION
See Function Table. In case of all active-Low operands (negative logic) the results Σ1–Σ4 and COUT should be interpreted also as active-Low. Interchanging inputs of equal weight does not affect the operation, thus A0, B0, CIN can arbitrarily be assigned to pins 5, 6, 7, etc. Due to pin limitations, the intermediate carries of the 74F283 are not brought out for use as inputs or outputs. However, other means can be used to effectively insert a carry into, or bring a carry out from, an intermediate stage. PIN CONFIGURATION Σ1 B1 A1 Σ0 A0 B0 CIN GND 1 2 3 4 5 6 7 8 16 VCC 15 B2 14 A2 13 Σ2 12 A3 11 B3 10 Σ3 9 COUT SF00852 TYPE 74F283 TYPICAL PROPAGATION DELAY 6.5ns TYPICAL SUPPLY CURRENT (TOTAL) 40mA ORDERING INFORMATIONDESCRIPTION
16-pin plastic DIP 16-pin plastic SO COMMERCIAL RANGE VCC = 5V ±10%, Tamb = 0°C to +70°C N74F283N N74F283D PKG DWG # SOT38-4 SOT109-1 INPUT AND OU...
