74F399 Datasheet Quad 2-port Register

Manufacturer: National Semiconductor (now Texas Instruments)

Overview: 54F 74F398 54F 74F399 Quad 2-Port Register www.DataSheet4U.

This datasheet includes multiple variants, all published together in a single manufacturer document.

Datasheet Details

Part number	74F399
Manufacturer	National Semiconductor (now Texas Instruments)
File Size	Direct Link
Description	Quad 2-Port Register
Datasheet	74F399 74F399PC Datasheet (PDF)

General Description

The ’F398 and ’F399 are the logical equivalents of a quad 2-input multiplexer feeding into four edge-triggered flipflops A common 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

Key Features

Y Select inputs from two data sources Y Fully positive edge-triggered operation Y Both true and complement outputs ’F398 Y Guaranteed 4000V minimum ESD protection ’F399 Commercial 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.

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