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SN74AC374DW Fiches technique(PDF) 1 Page - Texas Instruments |
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SN74AC374DW Fiches technique(HTML) 1 Page - Texas Instruments |
1 / 6 page SN54AC374, SN74AC374 OCTAL DTYPE EDGETRIGGERED FLIPFLOPS WITH 3STATE OUTPUTS SCAS543E − OCTOBER 1995 - REVISED OCTOBER 2003 1 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 D 2-V to 6-V VCC Operation D Inputs Accept Voltages to 6 V D Max tpd of 9.5 ns at 5 V D 3-State Noninverting Outputs Drive Bus Lines Directly D Full Parallel Access for Loading description/ordering information These 8-bit flip-flops feature 3-state outputs designed specifically for driving highly capacitive or relatively low-impedance loads. The devices are particularly suitable for implementing buffer registers, I/O ports, bidirectional bus drivers, and working registers. The eight flip-flops of the ’AC374 devices are D-type edge-triggered flip-flops. On the positive transition of the clock (CLK) input, the Q outputs are set to the logic levels set up at the data (D) inputs. A buffered output-enable (OE) input can be used to place the eight outputs in either a normal logic state (high or low logic levels) or the high-impedance state. In the high-impedance state, the outputs neither load nor drive the bus lines significantly. The high-impedance state and the increased drive provide the capability to drive bus lines in bus-organized systems without need for interface or pullup components. OE does not affect internal operations of the flip-flop. Old data can be retained or new data can be entered while the outputs are in the high-impedance state. ORDERING INFORMATION TA PACKAGE† ORDERABLE PART NUMBER TOP-SIDE MARKING PDIP − N Tube SN74AC374N SN74AC374N SOIC − DW Tube SN74AC374DW AC374 SOIC − DW Tape and reel SN74AC374DWR AC374 −40 °C to 85°C SOP − NS Tape and reel SN74AC374NSR AC374 −40 C to 85 C SSOP − DB Tape and reel SN74AC374DBR AC374 TSSOP − PW Tube SN74AC374PW AC374 TSSOP − PW Tape and reel SN74AC374PWR AC374 CDIP − J Tube SNJ54AC374J SNJ54AC374J −55 °C to 125°C CFP − W Tube SNJ54AC374W SNJ54AC374W −55 C to 125 C LCCC − FK Tube SNJ54AC374FK SNJ54AC374FK † Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at www.ti.com/sc/package. Copyright 2003, Texas Instruments Incorporated PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 OE 1Q 1D 2D 2Q 3Q 3D 4D 4Q GND VCC 8Q 8D 7D 7Q 6Q 6D 5D 5Q CLK SN54AC374 ...J OR W PACKAGE SN74AC374 . . . DB, DW, N, NS, OR PW PACKAGE (TOP VIEW) 3 2 1 20 19 9 10 11 12 13 4 5 6 7 8 18 17 16 15 14 2D 2Q 3Q 3D 4D SN54AC374...FK PACKAGE (TOP VIEW) 8D 7D 7Q 6Q 6D On products compliant to MILPRF38535, all parameters are tested unless otherwise noted. On all other products, production processing does not necessarily include testing of all parameters. |
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