74F399 Datasheet | National Semiconductor

54F 74F398 54F 74F399 Quad 2-Port Register .. May 1995 54F 74F398 54F 74F399 Quad 2-Port Register General Description The ’F398 and ’F399 are the logical equivalents of a quad 2-input multiplexer feeding into four edge-triggered flipflops A mon Select input determines which of the two 4-bit words is accepted The selected data enters the flipflops on the rising edge of the clock The ’F399 is the 16-pin version of the ’F398 with only the Q outputs of the flip-flops available Features Y Select inputs from two data sources Y Fully positive edge-triggered operation Y Both true and plement outputs ’F398 Y Guaranteed 4000V minimum ESD protection ’F399 mercial 74F398PC 74F398SC (Note 1) 74F399PC 74F399SC (Note 1) 74F399SJ (Note 1) Military 54F398DM (Note 2) 54F398FM (Note 2) 54F398LM (Note 2) 54F399DM (Note 2) 54F399FM (Note 2) 54F399LM (Note 2) Package Number N20A J20A M20B W20A E20A N20A J20A M20B M20D W20A E20A Package Description 20-Lead (0 300 Wide) Molded Dual-In-Line 20-Lead Ceramic Dual-In-Line 20-Lead (0 300 Wide) Molded Small Outline JEDEC 20-Lead Cerpack 20-Lead Ceramic Leadless Chip Carrier Type C 20-Lead (0 300 Wide) Molded Dual-In-Line 20-Lead Ceramic Dual-In-Line 20-Lead (0 300 Wide) Molded Small Outline JEDEC 20-Lead (0 300 Wide) Molded Small Outline EIAJ 20-Lead Cerpack 20-Lead Ceramic Leadless Chip Carrier Type C Note 1 Devices also available in 13 reel Use suffix e SCX and SJX Note 2 Military grade device with environmental and burn-in processing Use suffix e DMQB FMQB and LMQB Connection Diagrams Pin Assignment for LCC ’F398 Pin Assignment for DIP SOIC and Flatpak TL F 9533 - 5 TRI-STATE is a registered trademark of National Semiconductor Corporation C1995 National Semiconductor Corporation TL F 9533 TL F 9533 - 6 RRD-B30M75 Printed in U S A Connection Diagrams (Continued) ’F399 Logic...