national semiconductor MM54C914/MM74C914 Hex Schmitt Trigger with Extended Input Voltage handbook

Update: 28 September, 2023

The MM54C914-MM74C914 is a monolithic CMOS Hex Schmitt trigger with a special input protection scheme. This scheme allows the input voltage levels to exceed VCC or ground by at least 10V (VCC ≤ 25V to GND ≥ 25V), which is valuable for applications involving voltage level shifting or mismatched power supplies. The positive and negative-going threshold voltages, VTa and VTb, show low variation with respect to temperature (typ 0.0005V/°C at VCC = 10V), and the hysteresis, VTa - VTb ≥ 0.2 VCC, is guaranteed.

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Publication date: 07 August, 2012

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PDF Link: national semiconductor MM54C914/MM74C914 Hex Schmitt Trigger with Extended Input Voltage handbook PDF