DATA SHEET www.onsemi.com Quad 2:1 Multiplexer/ MARKING DIAGRAMS Demultiplexer Bus Switch 16 16 FST3257G 74FST3257 1 AWLYWW SOIC16 The onsemi 74FST3257 is a quad 2:1, high performance D SUFFIX 1 CASE 751B multiplexer/demultiplexer bus switch. The device is CMOS TTL compatible when operating between 4 and 5.5 Volts. The device 16 exhibits extremely low R and adds nearly zero propagation delay. ON 16 The device adds no noise or ground bounce to the system. FST 3257 Features 1 ALYW R 4 Typical TSSOP16 ON DT SUFFIX Less Than 0.25 nsMax Delay Through Switch CASE 948F Nearly Zero Standby Current 1 No Circuit Bounce Control Inputs are TTL/CMOS Compatible 1 3257 PinForPin Compatible With QS3257, FST3257, CBT3257 ALYW QFN16 All Popular Packages: SOIC16, TSSOP16, QFN16 MN SUFFIX CASE 485AW NLV Prefix for Automotive and Other Applications Requiring Unique Site and Control Change Requirements AECQ100 A = Assembly Location Qualified and PPAP Capable WL, L = Wafer Lot Y = Year These Devices are PbFree, Halogen Free/BFR Free and are RoHS WW, W = Work Week Compliant G or = PbFree Package (Note: Microdot may be in either location) S V CC PIN NAMES 1 16 SV 1 16 CC 1B OE 2 15 1 Pin Description 1B 2 15 OE 1 1B 4B 3 14 2 1 OE , OE Bus Switch Enables 1B 3 14 4B 1 2 2 1 GND 4B 1A 4 13 4B 1A 4 13 2 2 S , S Select Inputs 0 1 2B 1 5 12 4A 2B 4A 1 5 12 A Bus A 2B 6 11 3B 2 1 2B 6 11 3B 2 1 B , B , B , B Bus B 2A 7 10 3B 1 2 3 4 2 2A 3B 7 10 2 GND89 3A 89 GND 3A ORDERING INFORMATION See detailed ordering and shipping information in the package dimensions section on page 2 of this data sheet. Figure 1. 16Lead Pinout Diagrams Function S OE X H Disconnect L L A = B 1 H L A = B 2 Figure 2. Truth Table Semiconductor Components Industries, LLC, 2011 1 Publication Order Number: August, 2021 Rev. 9 74FST3257/D74FST3257 1A 1B 1B 2 2A 2B 1 2B 2 3A 3B 1 3B 2 4A 4B 1 4B 2 FLOW CONTROL OE S Figure 3. Logic Diagram ORDERING INFORMATION Device Order Number Package Shipping 74FST3257DR2G SOIC16 2500 Units / Tape & Reel (PbFree) NLV74FST3257DR2G* 74FST3257DTR2G TSSOP16 2500 Units / Tape & Reel (PbFree) 74FST3257MNTWG QFN16 3000 Units / Tape & Reel (PbFree) 74FST3257MN2TWG QFN16 3000 Units / Tape & Reel (PbFree) (4mm pitch carrier tape) For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifications Brochure, BRD8011/D. *NLV Prefix for Automotive and Other Applications Requiring Unique Site and Control Change Requirements AECQ100 Qualified and PPAP Capable. www.onsemi.com 2