CD4066B

• 15-V Digital or ±7.5-V Peak-to-Peak Switching
• 125-Ω Typical On-State Resistance for
  15-V Operation
• Switch On-State Resistance Matched to Within
  5 Ω Over 15-V Signal-Input Range
• On-State Resistance Flat Over Full
  Peak-to-Peak Signal Range
• High On or Off Output-Voltage Ratio:
  80 dB Typical at f_is = 10 kHz, R_L = 1 kΩ
• High Degree of Linearity: <0.5% Distortion Typical at f_is = 1 kHz, V_is = 5-V_p-p
  V_DD – V_SS ≥ 10-V, R_L = 10 kΩ
• Extremely Low Off-State Switch Leakage, Resulting in Very Low Offset Current and High Effective Off-State Resistance: 10 pA Typical at V_DD – V_SS = 10-V, T_A = 25°C
• Extremely High Control Input Impedance
  (Control Circuit Isolated From Signal Circuit):
  10¹² Ω Typical
• Low Crosstalk Between Switches: –50 dB Typical at f_is = 8 MHz, R_L = 1 kΩ
• Matched Control-Input to Signal-Output Capacitance: Reduces Output Signal Transients
• Frequency Response,
  Switch On = 40 MHz Typical
• 100% Tested for Quiescent Current at 20-V
• 5-V, 10-V, and 15-V Parametric Ratings

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The CD4066B device is a quad bilateral switch intended for the transmission or multiplexing of analog or digital signals. It is pin-for-pin compatible with the CD4016B device, but exhibits a much lower on-state resistance. In addition, the on-state resistance is relatively constant over the full signal-input range.

The CD4066B device consists of four bilateral switches, each with independent controls. Both the p and the n devices in a given switch are biased on or off simultaneously by the control signal. As shown in Figure 17, the well of the n-channel device on each switch is tied to either the input (when the switch is on) or to V_SS (when the switch is off). This configuration eliminates the variation of the switch-transistor threshold voltage with input signal and, thus, keeps the on-state resistance low over the full operating-signal range.

The advantages over single-channel switches include peak input-signal voltage swings equal to the full supply voltage and more constant on-state impedance over the input-signal range. However, for sample-and-hold applications, the CD4016B device is recommended.