| HEF4066B | Philips Semiconductors | Quadruple bilateral switches |
| HEC4066BT | Philips Semiconductors | HEF4066B gates; Quadruple bilateral switches |
| HEF4066BP | Philips Semiconductors | HEF4066B gates; Quadruple bilateral switches |
| HEF4066BT | Philips Semiconductors | HEF4066B gates; Quadruple bilateral switches |
| HEF4066BU | Philips Semiconductors | HEF4066B gates; Quadruple bilateral switches |