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SN74LVC574 Datasheet(PDF) 1 Page - Texas Instruments |
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SN74LVC574 Datasheet(HTML) 1 Page - Texas Instruments |
1 / 5 page SN74LVC574 OCTAL EDGE-TRIGGERED D-TYPE FLIP-FLOP WITH 3-STATE OUTPUTS SCAS301 – JANUARY 1993 – REVISED MARCH 1994 Copyright © 1994, Texas Instruments Incorporated 7–1 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 • EPIC ™ (Enhanced-Performance Implanted CMOS) Submicron Process • Typical V OLP (Output Ground Bounce) < 0.8 V at VCC = 3.3 V, TA = 25°C • Typical V OHV (Output VOH Undershoot) > 2 V at VCC = 3.3 V, TA = 25°C • Package Options Include Plastic Small-Outline (DW), Shrink Small-Outline (DB), and Thin Shrink Small-Outline (PW) Packages description This octal edge-triggered D-type flip-flop is designed for 2.7-V to 3.6-V VCC operation. The SN74LVC574 features 3-state outputs designed specifically for driving highly capacitive or relatively low-impedance loads. It is 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 logic levels that were 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. The output-enable (OE) input does not affect the 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 SN74LVC574 is characterized for operation from – 40 °C to 85°C. FUNCTION TABLE (each flip-flop) INPUTS OUTPUT OE CLK D Q L ↑ H H L ↑ LL L LX Q0 H X X Z DB, DW, OR PW PACKAGE (TOP VIEW) 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 OE 1D 2D 3D 4D 5D 6D 7D 8D GND VCC 1Q 2Q 3Q 4Q 5Q 6Q 7Q 8Q CLK EPIC is a trademark of Texas Instruments Incorporated. PRODUCT PREVIEW information concerns products in the formative or design phase of development. Characteristic data and other specifications are design goals. Texas Instruments reserves the right to change or discontinue these products without notice. |
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