DS1666S 查看數據表（PDF） - Dallas Semiconductor -> Maxim Integrated

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DS1666S

Audio Digital Resistor

Dallas Semiconductor -> Maxim Integrated 

DS1666

PIN DESCRIPTIONS

VCC - Power Supply. The DS1666 will support supply voltages ranging from +4.5 to +5.5 volts.

GND - Ground Terminal.

VB - Negative Bias. The DS1666 will support a negative bias ranging from 0 to -5 volts.

H - High-Terminal of Potentiometer. It is not required that this terminal be connected to a potential

greater than the VL terminal. Voltage applied to the VH terminal can not exceed the power-supply

voltage, (VCC), or go below the negative bias, (VB).

VL - Low-Terminal of Potentiometer. It is not required that this terminal be connected to a potential less

than the VH terminal. Voltage applied to the VL terminal cannot exceed the power-supply voltage, (VCC),

or go below the negative bias (VB).

VW - Wiper of the Potentiometer. Its position on the resistor array is controlled by the 3-terminal control

port. Voltage applied to the wiper cannot exceed the power-supply voltage, VCC, or go below the

negative bias (VB).

CS - Chip Select. The CS input is used to activate the control port of the DS1666. This input is active

low. When in a high-state, activity on the INC and U/ D port pins will not affect or change wiper

position.

INC - Wiper Movement Control. This input provides for wiper position changes when the CS pin is low.

Wiper position changes will occur one position per high-to-low transition of this input signal. Position

changes will not occur if the CS pin is in a high-state.

U/ D - Up/Down Control. This input sets the direction of wiper movement. When in a high-state and CS

is low, any high-to-low transition on INC will cause a one position movement of the wiper towards the

VH terminal. When in a low-state and CS is low, any high-to-low transitions on INC will cause the

position of the wiper to move towards the VL terminal.

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