Quad 2-Port Register
74AC399 • 74ACT399 Quad 2-Port Register
June 1988 Revised October 2000
74AC399 • 74ACT399 Quad 2-Port Register
Genera...
Description
74AC399 74ACT399 Quad 2-Port Register
June 1988 Revised October 2000
74AC399 74ACT399 Quad 2-Port Register
General Description
The AC/ACT399 is the logical equivalent 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-flop on the rising edge of the clock.
Features
s ICC reduced by 50% s Select inputs from two data sources s Fully positive edge-triggered operation s Outputs source/sink 24 mA s AC/ACT399 has TTL-compatible inputs
Ordering Code:
Order Number Package Number
Package Description
74AC399SC
M16A
16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow
74AC399PC
N16E
16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
74ACT399SC
M16A
16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow
74ACT399SJ
M16D
16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide...
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