NXP HEF4093BT 与非门, HEF4000系列, 施密特触发, 4门, 2输入, 2.4 mA, 4.5V至15.5V, SOIC-14
The is a quad two input NAND gate. Each input has a Schmitt trigger circuit. The gate switches at different points for positive going and negative going signals. The difference between the positive voltage VT+ and the negative voltage VT- is defined as hysteresis voltage VH.