NXP Semiconductors HEF4008B
The HEF4008B is a 4-bit binary full adder with two 4-bit data inputs (A0 to A3, B0 to B3), a carry input (CIN), four sum outputs (S0 to S3), and a carry output (COUT). The IC uses full look-ahead across 4-bits to generate COUT. This minimizes the necessity for extensive look-ahead and carry-cascading circuits.| Part No. | HEF4008B |
|---|---|
| Datasheet | HEF4008B Download |
| Manufacturer |  NXP Semiconductors |
| Description | 4-bit binary full adder |
| Buy | Stock & Price |
DESCRIPTION
HEF4008B MSI Fig.2 Pinning diagram. PINNING A0 to A3 B0 to B3 S0 to S3 CIN COUT data inputs data inputs sum outputs carry input carry output TRUTH TABLE (one adder) CIN L L L L H Fig.1 Functional diagram. H H H HEF4008BP(N): HEF4008BD(F): HEF4008BT(D): 16-lead DIL; plastic (SOT38-1) 16-lead DIL; ceramic (cerdip) (SOT74) 16-lead SO; plastic (SOT109-1) ( ): Package Designator North America FAMILY DATA, IDD LIMITS category MSI See Family Specifications A L L H H L L H H B L H L H L H L H COUT L L L H L H H H S L H H L H L L H January 1995 2 Philips Semiconductors Product specification 4-bit binary full adder HEF4008B MSI Fig.3 Logic diagram. January 1995 3 Philips Semiconductors Product specification 4-bit binary full adder AC CHARACTERISTICS VSS = 0 V; Tamb = 25 °C; CL = 50 pF; input transition times ≤ 20 ns VDD V Propagation delays sum in → sum out HIGH to LOW 5 10 15 5 LOW to HIGH sum in → COUT HIGH to LOW 10 15 5 10 15 5 LOW to HIGH CIN → sum out HIGH to LOW 10 15 5 10 15 5...
