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SN74AC534 데이터시트(PDF) 1 Page - Texas Instruments |
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SN74AC534 데이터시트(HTML) 1 Page - Texas Instruments |
1 / 6 page SN54AC534, SN74AC534 OCTAL EDGE-TRIGGERED D-TYPE FLIP-FLOPS WITH 3-STATE OUTPUTS SCAS554A – NOVEMBER 1995 – REVISED MAY 1996 1 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 D 3-State Inverting Outputs Drive Bus Lines Directly D Full Parallel Access for Loading D EPIC ™ (Enhanced-Performance Implanted CMOS) 1- µm Process D Package Options Include Plastic Small-Outline (DW), Shrink Small-Outline (DB), Thin Shrink Small-Outline (PW), Ceramic Chip Carriers (FK) and Flatpacks (W), and Standard Plastic (N) and Ceramic (J) DIPs description These octal edge-triggered D-type flip-flops feature 3-state outputs designed specifically for driving highly capacitive or relatively low-imped- ance loads. The devices are particularly suitable for implementing buffer registers, I/O ports, bidirectional bus drivers, and working registers. On the positive transition of the clock (CLK) input, the Q outputs are set to the complements of 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 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. OE does not affect internal operations 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 SN54AC534 is characterized for operation over the full military temperature range of –55 °C to 125°C. The SN74AC534 is characterized for operation from –40 °C to 85°C. FUNCTION TABLE (each flip-flop) INPUTS OUTPUT OE CLK D Q L ↑ H L L ↑ LH L H or L X Q0 H X X Z 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. Copyright © 1996, Texas Instruments Incorporated EPIC is a trademark of 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. 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 SN54AC534 ...J OR W PACKAGE SN74AC534 . . . DB, DW, N, OR PW PACKAGE (TOP VIEW) 32 1 20 19 9 10 11 12 13 4 5 6 7 8 18 17 16 15 14 8D 7D 7Q 6Q 6D 2D 2Q 3Q 3D 4D SN54AC534 ...FK PACKAGE (TOP VIEW) |
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