74AC257 Datasheet | Fairchild Semiconductor

Description The AC/ACT257 is a quad 2-input multiplexer with 3STATE outputs. Four bits of data from two sources can be selected using a mon Data Select input. The four outputs present the selected data in true (noninverted) form. The outputs may be switched to a high impedance state by placing a logic HIGH on the mon Output Enable (OE) input, allowing the outputs to interface directly with bus-oriented systems. Features s ICC and IOZ reduced by 50% s Multiplexer expansion by tying outputs together s Noninverting 3-STATE outputs s Outputs source/sink 24 m A s ACT257 has TTL-patible inputs Ordering Code: Order Number 74AC257SC 74AC257SJ 74AC257MTC 74AC257PC 74ACT257SC 74ACT257SJ 74ACT257MTC 74ACT257PC Package Number M16A M16D MTC16 N16E M16A M16D MTC16 N16E Package Description 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150” Narrow Body 16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide 16-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300” Wide 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150” Narrow Body 16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide .. 16-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300” Wide Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code. Logic Symbols Connection Diagram IEEE/IEC Pin Descriptions Pin Names S OE I0a- I0d I1a- I1d Za- Zd Description mon Data Select Input 3-STATE Output Enable Input Data Inputs from Source 0 Data Inputs from Source 1 3-STATE Multiplexer Outputs FACT is a trademark of Fairchild Semiconductor Corporation. © 1999 Fairchild Semiconductor Corporation DS009949 .fairchildsemi. - 74ACT257 Functional Description The AC/ACT257 is quad 2-input multiplexer with 3-STATE outputs. It selects four bits of data from two...