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SN74HC590AD 数据表(PDF) 6 Page - Texas Instruments |
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SN74HC590AD 数据表(HTML) 6 Page - Texas Instruments |
6 / 22 page SN54HC590A, SN74HC590A 8BIT BINARY COUNTERS WITH 3STATE OUTPUT REGISTERS SCLS039F − DECEMBER 1982 − REVISED SEPTEMBER 2003 6 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 timing requirements over recommended operating free-air temperature range (unless otherwise noted) VCC TA = 25°C SN54HC590A SN74HC590A UNIT VCC MIN MAX MIN MAX MIN MAX UNIT 2 V 4 2.5 3.2 fclock Clock frequency 4.5 V 20 13 16 MHz fclock Clock frequency 6 V 24 16 19 MHz 2 V 125 200 155 CCLK or RCLK high or low 4.5 V 25 38 31 tw Pulse duration CCLK or RCLK high or low 6 V 21 32 26 ns tw Pulse duration 2 V 100 150 125 ns CCLR low 4.5 V 20 30 25 CCLR low 6 V 17 26 21 2 V 100 150 125 CCKEN low before CCLK ↑ 4.5 V 20 30 25 CCKEN low before CCLK ↑ 6 V 17 26 21 2 V 100 150 125 tsu Setup time CCLR high (inactive) before CCLK ↑ 4.5 V 20 30 25 ns tsu Setup time CCLR high (inactive) before CCLK ↑ 6 V 17 26 21 ns 2 V 100 150 125 CCLK ↑ before RCLK↑† 4.5 V 20 30 25 CCLK ↑ before RCLK↑† 6 V 17 26 21 2 V 50 75 60 th Hold time CCKEN low after CCLK ↑ 4.5 V 10 15 12 ns th Hold time CCKEN low after CCLK 6 V 9 13 11 ns † This setup time ensures that the register gets stable data from the counter outputs. The clocks may be tied together, in which case the register is one clock pulse behind the counter. |
类似零件编号 - SN74HC590AD |
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类似说明 - SN74HC590AD |
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