TLF9533

May 1995

54F74F398

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 flip-

flops A common Select input determines which of the two

4-bit words is accepted The selected data enters the flip-

flops 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 complement outputs’F398

Y

Guaranteed 4000V minimum ESD protection’F399

Commercial

Military

Package

Package Description

Number

74F398PC

N20A

20-Lead (0300 Wide) Molded Dual-In-Line

54F398DM (Note 2)

J20A

20-Lead Ceramic Dual-In-Line

74F398SC (Note 1)

M20B

20-Lead (0300 Wide) Molded Small Outline JEDEC

54F398FM (Note 2)

W20A

20-Lead Cerpack

54F398LM (Note 2)

E20A

20-Lead Ceramic Leadless Chip Carrier Type C

74F399PC

N20A

20-Lead (0300 Wide) Molded Dual-In-Line

54F399DM (Note 2)

J20A

20-Lead Ceramic Dual-In-Line

74F399SC (Note 1)

M20B

20-Lead (0300 Wide) Molded Small Outline JEDEC

74F399SJ (Note 1)

M20D

20-Lead (0300 Wide) Molded Small Outline EIAJ

54F399FM (Note 2)

W20A

20-Lead Cerpack

54F399LM (Note 2)

E20A

20-Lead Ceramic Leadless Chip Carrier Type C

Note 1

Devices also available in 13

Note 2

Connection Diagrams

’F398

Pin Assignment

for LCC

TLF9533 – 5

Pin Assignment

for DIP SOIC and Flatpak

TLF9533 – 6

TRI-STATE

is a registered trademark of National Semiconductor Corporation

C1995 National Semiconductor Corporation

RRD-B30M75Printed in U S A