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MM54C914J
Hex Schmitt Trigger with Extended Input Voltage
TL/F/5917
MM54C914/MM74C914
Hex
Schmitt
Trigger
with
Extended
Input
Voltage
February 1988
MM54C914/MM74C914 Hex Schmitt
Trigger with Extended Input Voltage
General Description
The MM54C914/MM74C914isa monolithic CMOS Hex
Schmitt trigger with special input protection scheme. This
scheme allowsthe input voltage levelsto exceed VCCor
groundbyat least 10V (VCCb25Vto GNDa 25V),andis
valuablefor applications involving voltage level shiftingor
mismatched power supplies.
The positive and negative-going threshold voltages, VTa
and VTb, showlow variation with respectto temperature
(typ 0.0005V/§CatVCCe 10V). Andthe hysteresis,
VTab VTbt0.2 VCCis guaranteed.
Features Hysteresis 0.45 VCC (typ.)
0.2 VCC guaranteed Special input protection Extended Input
Voltage Range Wide supply voltage range 3Vto 15V High noise immunity 0.7 VCC (typ.) Low power TTL Fanoutof2
compatibility driving74L
Connection Diagram
Dual-In-Line Package
TL/F/5917–1
Top View
Order NumberMM54C914or MM74C914
SpecialInputProtection&25V
forthe diodes.
TL/F/5917–2
C1995National SemiconductorCorporation RRD-B30M105/PrintedinU.S.A.
