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74F398 鈥?74F399 Quad 2-Port Register

April 1988

Revised August 1999

74F398 鈥?74F399

Quad 2-Port Register

General Description

The 74F398 and 74F399 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 74F399 is the

16-pin version of the 74F398, with only the Q outputs of the

flip-flops available.

Features

s

Select inputs from two data sources

s

Fully positive edge-triggered operation

s

Both true and complement outputs鈥?4F398

Ordering Code:

Order Number

74F398SC

74F398PC

74F399SC

74F399SJ

74F399PC

Package Number

M20B

N20A

M16A

M16D

N16E

Package Description

20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300鈥?Wide Body

20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300鈥?Wide

16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150鈥?Narrow Body

16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide

16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300鈥?Wide

Device also available in Tape and Reel. Specify by appending suffix letter 鈥淴鈥?to the ordering code.

Connection Diagrams

74F398

74F399

漏 1999 Fairchild Semiconductor Corporation

DS009533

www.fairchildsemi.com

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