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