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TS3004ITD1033TP データシート(PDF) 9 Page - Touchstone Semiconductor Inc |
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TS3004ITD1033TP データシート(HTML) 9 Page - Touchstone Semiconductor Inc |
9 / 11 page TS3004 TS3004DS r1p0 Page 9 RTFDS or example, if the instrument’s input probe capacitance is 15pF and the desired effective load capacitance at either or both FOUT and PWMOUT terminals is to be ≤5p , then the value of C EXT should be ≤7.5p . TS3004 Start-up Time As the TS3004 is powered up, its FOUT terminal (and PWMOUT terminal, if enabled) is active once the applied VDD is higher than 1.55V. Once the applied VDD is higher than 1.55V, the master oscillator achieves steady-state operation within 8ms. 2 Weeks and 2 Days Counter Circuit with TS3004 The TS3004 can be configured into a 2 Weeks and 2 Days counter as shown in Figure 2. The circuit is composed of a TS3004 timer and three dual 74VHC393 4-bit counters. The TS3004 divider inputs are set to FDIV2:0 = 111. With a n RS T of 4.32MΩ, the FOUT period is approximately 1.4 minutes. The complete circuit consumes approximately 11µA and is powered with a single 3V CR2032 lithium button cell battery. If a longer period is desired, a sixth counter is available in the third 74VHC393. Divide the PWMOUT Output Frequency by Two with the TS3004 Using a single resistor and capacitor, the TS3004 can be configured to a divide by two circuit as shown in Figure 3. To achieve a divide by two function with the TS3004, the pulse width of the PWMOUT output must be at least a factor of 2 greater than the period set at FOUT by resistor RSET. The CPWM capacitor selected must meet this pulse width requirement and can be calculated using Equation 2. In Figure 3, a value of 4.32MΩ for RS T sets the O T output period to 40µs. A CPWM capacitor of 265pF was chosen, which sets the pulse width of PWMOUT to Figure 3: Configuring the TS3004 into a Divide by Two Frequency Divider Figure 2: 2 Weeks and 2 Days Counter Circuit |
同様の部品番号 - TS3004ITD1033TP |
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同様の説明 - TS3004ITD1033TP |
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