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74F399PC 数据表(PDF) 1 Page - Fairchild Semiconductor |
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74F399PC 数据表(HTML) 1 Page - Fairchild Semiconductor |
1 / 7 page © 2004 Fairchild Semiconductor Corporation DS009533 www.fairchildsemi.com April 1988 Revised January 2004 74F399 Quad 2-Port Register General Description The 74F399 is the logical equivalent of a quad 2-input mul- tiplexer feeding into four edge-triggered flip-flops. A com- mon Select input determines which of the two 4-bit words is accepted. The selected data enters the flip-flops on the ris- ing edge of the clock. Features s Select inputs from two data sources s Fully positive edge-triggered operation Ordering Code: Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code. Logic Symbols Connection Diagram Unit Loading/Fan Out Order Number Package Number Package Description 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 Pin Names Description U.L. Input IIH/IIL HIGH/LOW Output IOH/IOL S Common Select Input 1.0/1.0 20 µA/−0.6 mA CP Clock Pulse Input (Active Rising Edge) 1.0/1.0 20 µA/−0.6 mA I0a–I0d Data Inputs from Source 0 1.0/1.0 20 µA/−0.6 mA I1a–I1d Data Inputs from Source 1 1.0/1.0 20 µA/−0.6 mA Qa–Qd Register True Outputs 50/33.3 −1 mA/20 mA |
类似零件编号 - 74F399PC |
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类似说明 - 74F399PC |
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