74F398 Datasheet, PDF (1/9 Pages) Fairchild Semiconductor – Quad 2-Port Register

April 1988
Revised October 2000
74F398 • 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—74F398
Ordering Code:
Order Number Package Number
Package Description
74F398SC
M20B
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
74F398PC
N20A
20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
74F399SC
M16A
16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow
74F399SJ
M16D
16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
74F399PC
N16E
16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code.
Connection Diagrams
74F398
74F399
© 2000 Fairchild Semiconductor Corporation DS009533
www.fairchildsemi.com