The 74FCT157T is a high-speed quad 2-input multiplexer. Common applications of the 74FCT157T are to move data from two different groups of registers to a common bus to use as a function generator. The 74FCT157T can generate any four of the 16 different functions of two variables with one variable common. The 74FCT157T operates at -40C to +85C


  • A, C, and D speeds
  • Low input and output leakage ?1 uA (max.)
  • CMOS power levels
  • True TTL input and output compatibility: VOH = 3.3V (typ.), VOL = 0.3V (typ.)
  • High Drive outputs (-15mA IOH, 48mA IOL)
  • Meets or exceeds JEDEC standard 18 specifications
  • Power off disable outputs permit "live insertion"
  • Available in 16 pin QSOP package


Title language Type Format File Size Date
Datasheets & Errata
star 74FCT157T Datasheet Datasheet PDF 168 KB
Application Notes & White Papers
AN-230 I/O Interface Standards Application Note PDF 160 KB
AN-147: The Myth of Ground Bounce Measurements Application Note PDF 130 KB
AN-152: FCT-T Octal Logic Characteristics... Application Note PDF 143 KB
AN-154: Estimating Power Dissipation in CMOS Application Note PDF 80 KB
PDN# : CQ-15-01 (R1) Quarter PDN for Declined Market Product Discontinuation Notice PDF 550 KB
PDN# : CQ-15-01 Quarter PDN for Declined Market Product Discontinuation Notice PDF 547 KB
PCN#: A-0410-02, Change IDT marking logo with new IDT gridless w Product Change Notice PDF 24 KB
PDN# : L-08-02 PRODUCT DISCONTINUANCE NOTICE Product Discontinuation Notice PDF 71 KB
PCN# A-0607-06 MMT Thailand as Alternate Assembly Facility for PLCC, SOIC 150mil/300mil Product Change Notice PDF 223 KB
PCN# A-0508-02: OSET Alternate Assembly Location for Green Product Change Notice PDF 18 KB
PCN#A-0504-02R1: Assembly Transfer IDT-Manila to OSE-Ph Product Change Notice PDF 16 KB
PCN#: TB-0504-01, Transfer Test & Backend from IDT-Manila to IDT Product Change Notice PDF 35 KB
PCN#: A-0412-04 - To comply with Pb-free labels - Green Products Product Change Notice PDF 80 KB
PCN # L0203-09R2 Addendum Fab Transfer from Fab 2 to Fab 4 Product Change Notice PDF 101 KB
PCN#:A-0401-01, new m/c G600 & 8290 d/a material Product Change Notice PDF 196 KB
PCN#:A-0312-01, new mold compound material - G600 Product Change Notice PDF 109 KB
PCN#:A-0312-02, new die attach material - 8290 Product Change Notice PDF 116 KB
PCN#: A-0310-01, Green Products Product Change Notice PDF 26 KB
PCN# L0203-09R1 Tech Upgrade & Fab Transfer Product Change Notice PDF 98 KB
PCN# G-0203-05 Mold Compound Product Change Notice PDF 40 KB
PCN# G0106-01, Moisture Sensitive Label Change Product Change Notice PDF 274 KB
PDN# Logic-00-07: Obsolete Selective Speed Grades Product Discontinuation Notice PDF 14 KB
PDN# Logic-00-09: Obsolete PDIP Package Product Discontinuation Notice PDF 73 KB
PCN# G0005-01, Laser Top Mark Product Change Notice PDF 24 KB


Title language Type Format File Size Date
74FCT157T IBIS Model Model - IBIS ZIP 9 KB