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DS4301 데이터시트(PDF) 3 Page - Dallas Semiconductor |
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DS4301 데이터시트(HTML) 3 Page - Dallas Semiconductor |
3 / 7 page Nonvolatile, 32-Position Digital Potentiometer _____________________________________________________________________ 3 Note 1: All voltages are referenced to ground. Note 2: STBY specified for VCC equal to 3.0V and 5.0V while control port logic pins are driven to VCC or GND. Note 3: Absolute linearity is used to determine wiper voltage versus expected voltage as determined by wiper position. Note 4: Relative linearity is used to determine the change of wiper voltage between two adjacent wiper positions. Note 5: The INC low to CS inactive time is the transition time that allows the three control pins to become inactive without writing the wiper position to the EEPROM. Note 6: Wiper storage time is the time required for the wiper position to be written to the EEPROM. During this time, the three-ter- minal interface is inactive. Note 7: Wiper load time is specified as the time required to load the wiper position stored in EEPROM once VCC has reached a stable operating voltage greater than or equal to VCC MIN. Note 8: Power-up time is specified as the time required before the three control pins become active once a stable power supply level of at least VCC MIN has been reached. Note 9: The maximum number of EEPROM write cycles is guaranteed by design and is not tested in production. AC ELECTRICAL CHARACTERISTICCS (VCC = VCC MIN to VCC MAX; TA = -40°C to +85°C. See Figure 2 for timing diagram.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS CS to INC Setup tCI 50 ns U/D to INC Setup tDI 100 ns INC Low Period tIL 50 ns INC High Period tIH 100 ns INC Inactive to CS Inactive tIC 500 ns CS Deselect Time tCPH 100 ns Wiper Change to INC Low tIW 200 ns INC Rise and Fall Times tR, tF 5µs INC Low to CS Inactive tIK (Note 5) 50 ns Wiper Storage Time tWST (Note 6) 10 ms CS Low Pulse tCLP 100 ns Wiper Load Time tWLT (Note 7) 500 µs Power-Up Time tPU (Note 8) 2 ms NONVOLATILE MEMORY CHARACTERISTICS (VCC = VCC MIN to VCC MAX) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS EEPROM Write Cycles +70°C (Note 9) 50,000 |
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