October 1987
Revised January 1999
MM74C14 He
x Sc
hm
i
t
t

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r
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© 1999 Fairchild Semiconductor Corporation DS005879.prf www.fairchildsemi.com
MM74C14
Hex Schmitt Trigger
General Description
The MM74C14 Hex Schmitt Trigger is a monolithic comple-
mentary MOS (CMOS) integrated circuit constructed with
N- and P-channel enhancement transistors. The positive
and negative going threshold voltages V
T+
and V
T−
, show
low variation with respect to temperature (typ. 0.0005V/°C
at V
CC
= 10V), and hysteresis, V
T+
− V
T−
≥ 0.2 V
CC
is guar-
anteed.
All inputs are protected from damage due to static dis-
charge by diode clamps to V
CC
and GND.
Features
a73 Wide supply voltage range: 3.0V to 15V
a73 High noise immunity: 0.70 V
CC
(typ.)
a73 Low power: TTL compatibility:
0.4 V
CC
(typ.) 0.2 V
CC
guaranteed
a73 Hysteresis: 0.4 V
CC
(typ.): 0.2 V
CC
guaranteed

Ordering Code:
Devices also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code.
Connection Diagram
Pin Assignments for DIP and SOIC
Top View
Order Number Package Number Package Description
MM74C14M M14A 14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-120, 0.150” Narrow
MM74C14N N14A 14-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300” Wide