DS1669-010 DALLAS [Dallas Semiconductor], DS1669-010 Datasheet
DS1669-010
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DS1669-010 Summary of contents
Page 1
... CPU. Wiper position is maintained in the absence of power through the use of a EEPROM memory cell array. The EEPROM cell array will withstand more than 50,000 writes. The DS1669 is offered in two standard IC packages which include an 8-pin 300-mil DIP and an 8-pin 208-mil SOIC. The DS1669 can be configured to operate using a single pushbutton, dual pushbutton or digital source input by varying power-on conditions ...
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... Repetitive pulsed inputs can be used to step through each resistive position of the device in a relatively fast manner (see Figure 5b). The requirement for repetitive pulsed inputs is that pulses must be separated by a minimum time of 1 ms. If the input is not allowed to be inactive (high) for at least 1 ms, the DS1669 will interpret repetitive pulses as a single pulse. ...
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Dual pushbutton mode of operation is entered when the DC input is floated on power-up. If interfacing contact closure control inputs to digital logic, the DC input must be interfaced to an open drain drive which is high impedance during ...
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... DS1669 SINGLE PUSHBUTTON CONFIGURATION (TYPICAL EXAMPLE) Figure 1 DS1669 DUAL PUSHBUTTON CONFIGURATION (TYPICAL APPLICATION) Figure ...
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... DS1669 DUAL PUSHBUTTON CONFIGURATION (TYPICAL APPLICATION) Figure 2B The DS1669 is provided with two supply inputs -V and +V. The maximum voltage difference between the two supply inputs is +8.0 volts. The minimum voltage difference is +4.5 volts. All input levels are referenced to the negative supply input, -V. The voltage applied to any Dallastat terminal must not exceed the negative supply voltage (- ...
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FLOWCHART: ONE-BUTTON OPERATION AND ELECTRICAL CONTROL Figure 3 CONTACT OPEN AND CONTACT CLOSURE TIMING ...
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FLOWCHART: TWO-BUTTON OPERATION Figure 4 CONTACT OPEN AND CONTACT CLOSURE TIMING IS 1sec. 15 ...
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ABSOLUTE MAXIMUM RATINGS* Voltage on Any Pin Relative to -V Operating Temperature Storage Temperature Soldering Temperature * This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the ...
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ANALOG RESISTOR CHARACTERISTICS PARAMETER SYMBOL End-to-End Resistor Tolerance Absolute Linearity Relative Linearity -3 dB Cutoff Frequency Noise fcutoff Figure Temperature Coefficient CAPACITANCE PARAMETER SYMBOL Input Capacitance C Output Capacitance C OUT TIMING DIAGRAMS Figure 5 MIN TYP -20 -0.75 -0.3 ...
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... Absolute linearity is used to determine wiper voltage versus expected voltage as determined by wiper position. 12. Relative linearity is used to determine the change in voltage between successive tap positions. 13 cutoff frequency characteristics for the DS1669 depend on potentiometer total resistance: DS1669-010; 1 MHz, DS1669-050; 200 kHz, DS1669-100; 100 kHz. 14. Valid only ...