HEF40106B is a six-way inverting Schmitt trigger produced by Philips Semiconductors. This device can trigger at different points for the positive and negative-going input signals. The difference between the positive-going voltage (VP) and the negative-going voltage (VN) is defined as hysteresis voltage (VH). This device may be used for enhanced noise immunity or to “square up” slowly changing waveforms.
The HEF40106B is a hex inverting Schmitt‑trigger gate designed for enhanced noise immunity and waveform shaping. Each circuit functions as an inverter with Schmitt‑trigger action, switching at different voltage thresholds for positive and negative input signals.
The datasheet lists DC and AC electrical characteristics, including typical hysteresis voltage of 0.5 V, typical propagation delays around 90 ns, and output transition times of about 60 ns. It also gives application examples such as wave and pulse shapers, astable multivibrators, and monostable multivibrators.
| Hysteresis voltage (typical) | 0.5 V |
|---|---|
| Positive‑going input threshold (typical) | 5.8 V |
| Input low voltage (typical) | 4.9 V |
| Propagation delay (typical) | 90 ns |
| Output transition time (typical) | 60 ns |
It is a hex inverting Schmitt‑trigger gate.
The typical hysteresis voltage is 0.5 V.
Typical propagation delays are about 90 ns for both low‑to‑high and high‑to‑low transitions.
Typical applications include wave and pulse shapers, astable multivibrators, and monostable multivibrators.