74F158A Datasheet | Fairchild Semiconductor

Description The F158A is a high speed quad 2-input multiplexer. It selects four bits of data from two sources using the mon Select and Enable inputs. The four outputs present the selected data in the inverted form. The F158A can also generate any four of the 16 different functions of two variables. Ordering Code: Order Number 74F158ASC 74F158ASJ 74F158APC Package Number M16A M16D N16E Package Description 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow 16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code. Logic Symbols Connection Diagram IEEE/IEC © 1999 Fairchild Semiconductor Corporation DS009484 .fairchildsemi. Unit Loading/Fan Out U.L. Pin Names I0a- I0d I1a- I1d E S Za- Zd Description HIGH/LOW Source 0 Data Inputs Source 1 Data Inputs Enable Input (Active LOW) Select Input Inverted Outputs 1.0/1.0 1.0/1.0 1.0/1.0 1.0/1.0 50/33.3 Input IIH/IIL Output IOH/IOL 20 µA/- 0.6 m A 20 µA/- 0.6 m A 20 µA/- 0.6 m A 20 µA/- 0.6 m A - 1 m A/20 m A Truth Table Inputs E H L L L L S X L L H H I0 X L H X X I1 X X X L H Outputs Z H H L H L Functional Description The F158A quad 2-input multiplexer selects four bits of data from two sources under the control of a mon Select input (S) and presents the data in inverted form at the four outputs. The Enable input (E) is active LOW. When E is HIGH, all of the outputs (Z) are forced HIGH regardless of all other inputs. The F158A is the logic implementation of a 4-pole, 2-position switch where the position of the switch is determined by the logic levels supplied to the Select input. A mon use of the F158A is the moving of data from two groups of registers to four mon output busses. The particular register from which the data es is determined by the state of the Select input. A less obvious use is as a function generator. The...