MC74AC257

Quad 2-Input Multiplexer with 3-State Outputs MC74AC257, MC74ACT257 The MC74AC257/74ACT257 is a quad 2−input multiplexer with 3−state outputs. Four bits of data from two sources can be selected using a Common 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 common Output Enable (OE) input, allowing the outputs to interface directly with bus−oriented systems. Multiplexer Expansion by Tying Outputs Together Noninverting 3−State Outputs Outputs Source/Sink 24 mA ′ACT257 Has TTL Compatible Inputs These are Pb−Free Devices VCC OE I0c I1c Zc I0d I1d Zd 16 15 14 13 12 11 10 9 DATA SHEET www.onsemi.com 16 1 16 1 MARKING DIAGRAMS 16 SOIC−16 D SUFFIX CASE 751B 1 XXXXXXG AWLYWW TSSOP−16 DT SUFFIX CASE 948F 16 XXX XXX ALYWG G 1 XXX A WL, L Y WW, W G or G = Specific Device Code = Assembly Location = Wafer Lot = Year = Work Week = Pb−Free Package (Note: Microdot may be in either location) ORDERING INFORMATION See detailed ordering and shipping information in the package dimensions section on page 7 of this data sheet. 12345678 S I0a I1a Za I0b I1b Zb GND Figure 1. Pinout: 16−Lead Packages Conductors (Top View) © Semiconductor Components Industries, LLC, 2015 1 February, 2024 − Rev. 9 Publication Order Number: MC74AC257/D MC74AC257, MC74ACT257 PIN NAME PIN S OE I0a−I0d I1a−I1d Za−Zd FUNCTION Common Data Select Input 3−State Output Enable ...