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CD74HC595EE4 데이터시트(PDF) 7 Page - Texas Instruments |
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CD74HC595EE4 데이터시트(HTML) 7 Page - Texas Instruments |
7 / 22 page CD74HC595 8BIT SHIFT REGISTERS WITH 3STATE OUTPUT REGISTERS SCHS353 − JANUARY 2004 7 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 timing requirements over recommended operating free-air temperature range (unless otherwise noted) VCC TA = 25°C TA = -55°C TO 125 °C TA = -40°C TO 85 °C UNIT VCC MIN MAX MIN MAX MIN MAX UNIT 2 V 6 4.2 5 fclock Clock frequency 4.5 V 31 21 25 MHz fclock Clock frequency 6 V 36 25 29 MHz 2 V 80 120 100 SRCLK or RCLK high or low 4.5 V 16 24 20 tw Pulse duration SRCLK or RCLK high or low 6 V 14 20 17 ns tw Pulse duration 2 V 80 120 100 ns SRCLR low 4.5 V 16 24 20 SRCLR low 6 V 14 20 17 2 V 100 150 125 SER before SRCLK ↑ 4.5 V 20 30 25 SER before SRCLK ↑ 6 V 17 25 21 2 V 75 113 94 SRCLK ↑ before RCLK↑† 4.5 V 15 23 19 tsu Setup time SRCLK ↑ before RCLK↑† 6 V 13 19 16 ns tsu Setup time 2 V 50 75 65 ns SRCLR low before RCLK ↑ 4.5 V 10 15 13 SRCLR low before RCLK ↑ 6 V 9 13 11 2 V 50 75 60 SRCLR high (inactive) before SRCLK ↑ 4.5 V 10 15 12 SRCLR high (inactive) before SRCLK ↑ 6 V 9 13 11 2 V 0 0 0 th Hold time, SER after SRCLK ↑ 4.5 V 0 0 0 ns th Hold time, SER after SRCLK 6 V 0 0 0 ns † This setup time allows the storage register to receive stable data from the shift register. The clocks can be tied together, in which case the shift register is one clock pulse ahead of the storage register. |
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