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SN54HC163 Datasheet(PDF) 13 Page - Texas Instruments |
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SN54HC163 Datasheet(HTML) 13 Page - Texas Instruments |
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13 / 24 page  SN54HC163, SN74HC163 4BIT SYNCHRONOUS BINARY COUNTERS SCLS298D − JANUARY 1996 − REVISED − OCTOBER 2003 13 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 APPLICATION INFORMATION n-bit synchronous counters (continued) timing requirements over recommended operating free-air temperature range (unless otherwise noted) VCC TA = 25°C SN54HC163 SN74HC163 UNIT VCC MIN MAX MIN MAX MIN MAX UNIT 2 V 3.6 2.5 2.9 fclock Clock frequency 4.5 V 18 12 14 MHz fclock Clock frequency 6 V 21 14 17 MHz 2 V 140 200 170 tw Pulse duration, CLK high or low 4.5 V 28 40 36 ns tw Pulse duration, CLK high or low 6 V 24 36 30 ns switching characteristics over recommended operating free-air temperature range, CL = 50 pF (unless otherwise noted) (see Note 4) PARAMETER FROM TO VCC TA = 25°C SN54HC163 SN74HC163 UNIT PARAMETER FROM (INPUT) TO (OUTPUT) VCC MIN MAX MIN MAX MIN MAX UNIT 2 V 3.6 2.5 2.9 fmax 4.5 V 18 12 14 MHz fmax 6 V 21 14 17 MHz NOTE 4: These limits apply only to applications that use more than two ’HC163 devices cascaded together. If the ’HC163 devices are used as a single unit, or only two cascaded together, then the maximum clock frequency that the devices can use is not limited because of the glitch. In these situations, the devices can be operated at the maximum specifications. A glitch can appear on RCO of a single ’HC163 device, depending on the relationship of ENT to CLK. Any application that uses RCO to drive any input, except an ENT of another cascaded ’HC163 device, must take this into consideration. |
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