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SN74HC594 Datasheet(PDF) 6 Page - Texas Instruments |
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SN74HC594 Datasheet(HTML) 6 Page - Texas Instruments |
6 / 9 page SN54HC594, SN74HC594 8-BIT SHIFT REGISTERS WITH OUTPUT REGISTERS SCLS040C – DECEMBER 1982 – REVISED FEBRUARY 1998 6 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 timing requirements over recommended operating free-air temperature range (unless otherwise noted) VCC TA = 25°C SN54HC594 SN74HC594 UNIT VCC MIN MAX MIN MAX MIN MAX UNIT 2 V 5 3.3 4 fclock Clock frequency 4.5 V 25 17 20 MHz 6 V 29 20 24 2 V 100 150 125 SRCLK or RCLK high or low 4.5 V 20 30 25 t Pulse duration 6 V 17 25 21 ns tw Pulse duration 2 V 100 150 125 ns SRCLR or RCLR low 4.5 V 20 30 25 6 V 17 25 21 ↑ 2 V 90 135 110 SER before SRCLK ↑ 4.5 V 18 27 22 6 V 15 23 19 ↑ ↑† 2 V 90 135 110 SRCLK ↑ before RCLK↑† 4.5 V 18 27 22 6 V 15 23 19 ↑ 2 V 50 75 63 tsu Setup time SRCLR low before RCLK ↑ 4.5 V 10 15 13 ns 6 V 9 13 11 ↑ 2 V 20 20 20 SRCLR high (inactive) before SRCLK ↑ 4.5 V 10 10 10 6 V 10 10 10 ↑ 2 V 5 5 5 RCLR high (inactive) before SRCLK ↑ 4.5 V 5 5 5 6 V 5 5 5 ↑ 2 V 5 5 5 th Hold time, SER after SRCLK ↑ 4.5 V 5 5 5 ns 6 V 5 5 5 † This setup time ensures the output register sees stable data from the shift-register outputs. The clocks may be tied together, in which case the output register is one clock pulse behind the shift register. 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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