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74AC399PC Datasheet(PDF) 1 Page - Fairchild Semiconductor |
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74AC399PC Datasheet(HTML) 1 Page - Fairchild Semiconductor |
1 / 8 page © 1999 Fairchild Semiconductor Corporation DS009789 www.fairchildsemi.com June 1988 Revised November 1999 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: Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code. Logic Symbols IEEE/IEC Connection Diagram Pin Descriptions FACT is a trademark of Fairchild Semiconductor Corporation. Order Number Package Number Package Description 74AC399SC M16A 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150” Narrow Body 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 Body 74ACT399SJ M16D 16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide 74ACT399PC N16E 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300” Wide Pin Names Description S Common Select Input CP Clock Pulse Input I0a–I0d Data Inputs from Source 0 I1a–I1d Data Inputs from Source 1 Qa–Qd Register True Outputs |
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