74F253 Datasheet | Fairchild Semiconductor

74F253 Dual 4-Input Multiplexer with 3-STATE Outputs April 1988 Revised August 1999 74F253 Dual 4-Input Multiplexer with 3-STATE Outputs General Description The 74F253 is a dual 4-input multiplexer with 3-STATE outputs. It can select two bits of data from four sources using mon select inputs. The output may be individually switched to a high impedance state with a HIGH on the respective Output Enable (OE) inputs, allowing the outputs to interface directly with bus oriented systems. Features s Multifunction capability s Non-inverting 3-STATE outputs Ordering Code: Order Number 74F253SC 74F253SJ 74F253PC 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 DS009505 .fairchildsemi. Unit Loading/Fan Out Pin Names I0a- I3a I0b- I3b S0- S1 OEa OEb Z a, Zb Description Side A Data Inputs Side B Data Inputs mon Select Inputs Side A Output Enable Input (Active LOW) Side B Output Enable Input (Active LOW) 3-STATE Outputs U.L. HIGH/LOW 1.0/1.0 1.0/1.0 1.0/1.0 1.0/1.0 1.0/1.0 150/40(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 20 µA/- 0.6 m A - 3 m A/24 m A (20 m A) Functional Description This device contains two identical 4-input multiplexers with 3-STATE outputs. They select two bits from four sources selected by mon Select inputs (S0, S1). The 4-input multiplexers have individual Output Enable (OEa, OEb) inputs which, when HIGH, force the outputs to a high impedance (High Z) state. This device is the logic implementation of a 2-pole, 4-position switch, where the position of the switch is determined by the logic...