The HEF4067B is a single-pole 16-throw analog switch (SP16T) suitable for use in analog or digital 16:1 multiplexer/demultiplexer applications. The switch features four digital select inputs A0, A1, A2 and A3), sixteen independent inputs/outputs (Yn), a common input/output (Z) and a digital enable input (E). When E is HIGH, the switches are turned off. Inputs include clamp diodes. This enables the use of current limiting resistors to interface inputs to voltages in excess of VDD.

The HEF4082B is a dual 4-input AND gate. The outputs are fully buffered for highest noise immunity and pattern insensitivity to output impedance variations. It operates over a recommended VDD power supply range of 3 V to 15 V referenced to VS Fully static operation ? 5 V, 10 V, and 15 V parametric ratings ? Standardized symmetrical output characteristics ? Inputs and outputs are protected against electrostatic effects ? Specified from ?40 ?C to 85 ?C and ?40 ?C to 125 ?C ? Complies with JEDEC standard JESD 13-B

The HEF4518B is a dual 4-bit internally synchronous BCD counter. The counter has two clock inputs (CP0 and CP1 ), buffered outputs from all four bit positions (O0 to O3) and an asynchronous master reset input (MR). The counter advances on either the LOW to HIGH transition of the CP0 input if CP1 is HIGH or the HIGH to LOW transition of the CP1 input if CP0 is LOW. Either CP0 or CP1 may be used as the clock input to the counter and the other clock input may be used as a clock enable input. A HIGH on MR resets the counter (O0 to O3 = LOW) independent of CP0 and CP1. Schmitt-trigger action in the clock inputs makes the circuit highly tolerant to slower clock rise and fall times. Inputs include clamp diodes. This enables the use of current limiting resistors to interface inputs to voltages in excess of VDD