TL/F/9461
54F/74F14
Hex
Inverter
Schmitt
Trigger
December 1994
54F/74F14
Hex Inverter Schmitt Trigger
General Description
The ’F14 contains six logic inverters which accept standard
TTL input signals and provide standard TTL output levels.
They are capable of transforming slowly changing input sig-
nals into sharply defined, jitter-free output signals. In addi-
tion, they have a greater noise margin than conventional
inverters.
Each circuit contains a Schmitt trigger followed by a Darling-
ton level shifter and a phase splitter driving a TTL totem-
pole output. The Schmitt trigger uses positive feed back to
effectively speed-up slow input transition, and provide differ-
ent input threshold voltages for positive and negative-going
transitions. This hysteresis between the positive-going and
negative-going input thresholds (typically 800 mV) is deter-
mined internally by resistor ratios and is essentially insensi-
tive to temperature and supply voltage variations.
Features
Y
Guaranteed 4000V minimum ESD protection
Y
Standard Military Drawing
— 5962-88752
Commercial Military
Package
Package Description
Number
74F14PC N14A 14-Lead (0.300 Wide) Molded Dual-In-Line
54F14DM (Note 2) J14A 14-Lead Ceramic Dual-In-Line
74F14SC (Note 1) M14A 14-Lead (0.150 Wide) Molded Small Outline, JEDEC
74F14SJ (Note 1) M14D 14-Lead (0.300 Wide) Molded Small Outline, EIAJ
54F14FM (Note 2) W14B 14-Lead Cerpack
54F14LM (Note 2) E20A 20-Lead Ceramic Leadless Chip Carrier, Type C
Note 1: Devices also available in 13 reel. Use Suffix e SCX and SJX.
Note 2: Military grade device with environmental and burn-in processing. Use suffix e DMQB, FMQB and LMQB.
Logic Symbol
IEEE/IEC
TL/F/9461–3
Connection Diagrams
Pin Assignment
DIP, SOIC and Flatpak
TL/F/9461–1
Pin Assignment
for LCC
TL/F/9461–2
TRI-STATE is a registered trademark of National Semiconductor Corporation.
C
1995 National Semiconductor Corporation RRD-B30M75/Printed in U. S. A.