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SN54HCT273 Datasheet(PDF) 1 Page - Texas Instruments |
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SN54HCT273 Datasheet(HTML) 1 Page - Texas Instruments |
1 / 6 page SN54HCT273, SN74HCT273 OCTAL D-TYPE FLIP-FLOPS WITH CLEAR SCLS068C – NOVEMBER 1988 – REVISED MAY 1997 1 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 D Inputs Are TTL-Voltage Compatible D Contain Eight D-Type Flip-Flops D Direct Clear Input D Applications Include: – Buffer/Storage Registers – Shift Registers – Pattern Generators D Package Options Include Plastic Small-Outline (DW) and Ceramic Flat (W) Packages, Ceramic Chip Carriers (FK), and Standard Plastic (N) and Ceramic (J) 300-mil DIPs description These devices are positive-edge-triggered D-type flip-flops with a common enable input. The ’HCT273 are similar to the ’HCT377, but feature a common clear enable (CLR) input instead of a latched clock. Information at the data (D) inputs meeting the setup time requirements is transferred to the Q outputs on the positive-going edge of the clock (CLK) pulse. Clock triggering occurs at a particular voltage level and is not directly related to the positive-going pulse. When CLK is at either the high or low level, the D input has no effect at the output. The circuits are designed to prevent false clocking by transitions at CLR. The SN54HCT273 is characterized for operation over the full military temperature range of –55 °C to 125°C. The SN74HCT273 is characterized for operation from –40 °C to 85°C. FUNCTION TABLE (each flip-flop) INPUTS OUTPUT CLR CLK D Q L X X L H ↑ HH H ↑ LL H L X Q0 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 CLR 1Q 1D 2D 2Q 3Q 3D 4D 4Q GND VCC 8Q 8D 7D 7Q 6Q 6D 5D 5Q CLK SN54HCT273 ...J OR W PACKAGE SN74HCT273 ...DW, N, OR PW PACKAGE (TOP VIEW) 3 2120 19 910 11 12 13 4 5 6 7 8 18 17 16 15 14 8D 7D 7Q 6Q 6D 2D 2Q 3Q 3D 4D SN54HCT273 . . . FK PACKAGE (TOP VIEW) Copyright © 1997, Texas Instruments Incorporated 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. UNLESS OTHERWISE NOTED this document contains PRODUCTION DATA information 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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