December 1998
Revised March 1999
7
4
VH
CT1
4
A
Hex Schm
i
t
t

I
nver
ter
© 1999 Fairchild Semiconductor Corporation DS500147.prf www.fairchildsemi.com
74VHCT14A
Hex Schmitt Inverter
General Description
The VHCT14A is an advanced high speed CMOS Hex
Schmitt Inverter fabricated with silicon gate CMOS technol-
ogy. The VHCT14A contains six independent inverters
which are capable of transforming slowly changing input
signals into sharply defined, jitter-free output signals.
Protection circuits ensure that 0V to 7V can be applied to
the input pins without regard to the supply voltage and to
the output pins with V
CC
= 0V. These circuits prevent
device destruction due to mismatched supply and input/
output voltages. This device can be used to interface 3V to
5V systems and two supply systems such as battery
backup.
Features
a73 High speed: t
PD
= 5.0 ns (typ) at T
A
= 25°C
a73 High noise immunity: V
IH
= 2.0V, V
IL
= 0.8V
a73 Power down protection is provided on all inputs and out-
puts
a73 Low noise: V
OLP
= 1.0V (max)
a73 Low power dissipation:
I
CC
= 2 µA (max) @ T
A
= 25°C
a73 Pin and function compatible with 74HCT14

Ordering Code:
Surface mount packages are also available on Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Logic Symbol
Pin Descriptions
Connection Diagram
Truth Table
Order Number Package Number Package Description
74VHCT14AM M14A 14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-120, 0.150” Narrow
74VHCT14ASJ M14D 14-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
74VHCT14AMTC MTC14 14-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
74VHCT14AN N14A 14-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300” Wide
Pin Names Description
A
n
Inputs
O
n
Outputs
AO
LH
HL