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SN74BCT29826DWR Arkusz danych(PDF) 1 Page - Texas Instruments |
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SN74BCT29826DWR Arkusz danych(HTML) 1 Page - Texas Instruments |
1 / 7 page SN54BCT29826, SN74BCT29826 8BIT BUSINTERFACE FLIPFLOPS WITH 3STATE OUTPUTS SCBS076A − NOVEMBER 1991 − REVISED NOVEMBER 1993 Copyright 1993, Texas Instruments Incorporated 2−1 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443 • State-of-the-Art BiCMOS Design Significantly Reduces ICCZ • ESD Protection Exceeds 2000 V Per MIL-STD-883C, Method 3015; Exceeds 200 V Using Machine Model (C = 200 pF, R = 0) • 3-State Inverting Buffer-Type Outputs Drive Bus Lines Directly • Package Options Include Plastic Small-Outline (DW) Packages, Ceramic Chip Carriers (FK) and Flatpacks (W), and Standard Plastic and Ceramic 300-mil DIPs (JT, NT) description These 8-bit bus-interface flip-flops feature 3-state outputs designed specifically for driving highly capacitive or relatively low-impedance loads. They are particularly suitable for implementing wider buffer registers, I/O ports, bidirectional bus drivers with parity, and working registers. The eight flip-flops are edge-triggered D-type flip-flops. With the clock-enable (CLKEN) input low, the device enters data on the low-to-high transition of the clock. Taking CLKEN high disables the clock buffer, thus latching the outputs. Taking the clear (CLR) input low causes the eight Q outputs to go low independently of the clock. Buffered output-enable (OE1, OE2, or OE3) inputs can be used to place the eight outputs in either a normal logic state (high or low) or a high-impedance state. In the high-impedance state, the outputs neither load nor drive the bus lines significantly. The high-impedance state and increased drive provide the capability to drive bus lines without need for interface or pullup components. The output-enable inputs do not affect the internal operation of the flip-flops. Old data can be retained or new data can be entered while the outputs are in the high-impedance state. The SN54BCT29826 is characterized for opera- tion over the full military temperature range of −55 °C to 125°C. The SN74BCT29826 is characterized for operation from 0 °C to 70°C. 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 OE1 OE2 1D 2D 3D 4D 5D 6D 7D 8D CLR GND VCC OE3 1Q 2Q 3Q 4Q 5Q 6Q 7Q 8Q CLKEN CLK SN54BCT29826 . . . JT OR W PACKAGE SN74BCT29826 . . . DW OR NT PACKAGE (TOP VIEW) 3 2 28 27 12 13 5 6 7 8 9 10 11 25 24 23 22 21 20 19 2Q 3Q 4Q NC 5Q 6Q 7Q 2D 3D 4D NC 5D 6D 7D 426 14 15 16 17 18 SN54BCT29826 . . . FK PACKAGE (TOP VIEW) NC − No internal connection 1 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. |
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