74VHC14 — Hex Schmitt Inverter
February 2008
74VHC14
Hex Schmitt Inverter
Features
■
High Speed: t
PD
=
5.5ns (typ.) at V
CC
=
5V
■
Low power dissipation: I
CC
=
2µA (max.) at T
A
=
25°C
■
High noise immunity: V
NIH
=
V
NIL
=
28% V
CC
(min.)
■
Power down protection is provided on all inputs
■
Low noise: V
OLP
=
0.8V (max.)
■
Pin and function compatible with 74HC14
General Description
The VHC14 is an advanced high speed CMOS Hex
Schmitt Inverter fabricated with silicon gate CMOS tech-
nology. It achieves the high speed operation similar to
equivalent Bipolar Schottky TTL while maintaining the
CMOS low power dissipation. Pin configuration and
function are the same as the VHC04 but the inputs have
hysteresis between the positive-going and negative-
going input thresholds, which are capable of transform-
ing slowly changing input signals into sharply defined,
jitter-free output signals, thus providing greater noise
margin than conventional inverters.
An input protection circuit ensures that 0V to 7V can be
applied to the input pins without regard to the supply
voltage. This device can be used to interface 5V to 3V
systems and two supply systems such as battery back
up. This circuit prevents device destruction due to mis-
matched supply and input voltages.
Ordering Information
Order Number
74VHC14M
74VHC14SJ
74VHC14MTC
74VHC140N
Package
Number
M14A
M14D
MTC14
N14A
Package Description
14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150"
Narrow
14-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
14-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153,
4.4mm Wide
14-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300" Wide
Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering number.
All packages are lead free per JEDEC: J-STD-020B standard.
©1993 Fairchild Semiconductor Corporation
74VHC14 Rev. 1.3.0
www.fairchildsemi.com
74VHC14 — Hex Schmitt Inverter
Absolute Maximum Ratings
Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be
operable above the recommended operating conditions and stressing the parts to these levels is not recommended.
In addition, extended exposure to stresses above the recommended operating conditions may affect device reliability.
The absolute maximum ratings are stress ratings only.
Symbol
V
CC
V
IN
V
OUT
I
IK
I
OK
I
OUT
I
CC
T
STG
T
L
Supply Voltage
DC Input Voltage
DC Output Voltage
Input Diode Current
Output Diode Current
DC Output Current
DC V
CC
/ GND Current
Storage Temperature
Parameter
Rating
–0.5V to +7.0V
–0.5V to +7.0V
–0.5V to V
CC
+ 0.5V
–20mA
±20mA
±25mA
±50mA
–65°C to +150°C
260°C
Lead Temperature (Soldering, 10 seconds)
Recommended Operating Conditions
(1)
The Recommended Operating Conditions table defines the conditions for actual device operation. Recommended
operating conditions are specified to ensure optimal performance to the datasheet specifications. Fairchild does not
recommend exceeding them or designing to absolute maximum ratings.
Symbol
V
CC
V
IN
V
OUT
T
OPR
Supply Voltage
Input Voltage
Output Voltage
Operating Temperature
Parameter
Rating
2.0V to +5.5V
0V to +5.5V
0V to V
CC
–40°C to +85°C
Note:
1. Unused inputs must be held HIGH or LOW. They may not float.
©1993 Fairchild Semiconductor Corporation
74VHC14 Rev. 1.3.0
www.fairchildsemi.com
3
74VHC14 — Hex Schmitt Inverter
DC Electrical Characteristics
T
A
=
25°C
Symbol
V
P
T
A
=
–40°C
to +85°C
Min.
Max
2.20
3.15
3.85
0.90
1.35
1.65
1.20
1.40
1.60
0.30
0.40
0.50
1.9
2.9
4.4
2.48
3.80
1.20
1.40
1.60
V
V
V
Parameter
Positive Threshold
Voltage
V
CC
3.0
4.5
5.5
3.0
4.5
5.5
3.0
4.5
5.5
Conditions
Min.
Typ.
Max.
2.20
3.15
3.85
Units
V
V
N
Negative Threshold
Voltage
0.90
1.35
1.65
0.30
0.40
0.50
V
IN
=
V
IL
I
OH
=
–50µA
1.9
2.9
4.4
I
OH
=
–4mA
I
OH
=
–8mA
V
IN
=
V
IH
I
OL
=
50µA
2.58
3.94
0.0
0.0
0.0
I
OL
=
4mA
I
OL
=
8mA
0.1
0.1
0.1
0.36
0.36
±0.1
2.0
2.0
3.0
4.5
V
H
Hysteresis Voltage
V
OH
HIGH Level Output
Voltage
2.0
3.0
4.5
3.0
4.5
V
OL
LOW Level Output
Voltage
2.0
3.0
4.5
3.0
4.5
0.1
0.1
0.1
0.44
0.44
±1.0
20.0
V
I
IN
I
CC
Input Leakage
Current
Quiescent Supply
Current
0–5.5 V
IN
=
5.5V or GND
5.5
V
IN
=
V
CC
or GND
µA
µA
Noise Characteristics
T
A
=
25°C
Symbol
V
OLP(2)
V
OLV
(2)
Parameter
Quiet Output Maximum Dynamic V
OL
Quiet Output Minimum Dynamic V
OL
Minimum HIGH Level Dynamic Input
Voltage
Maximum LOW Level Dynamic Input
Voltage
V
CC
5.0
5.0
5.0
5.0
Conditions
C
L
=
50 pF
C
L
=
50 pF
C
L
=
50 pF
C
L
=
50 pF
Typ.
0.4
–0.4
Limits
0.8
–0.8
3.5
1.5
Units
V
V
V
V
V
IHD(2)
V
ILD(2)
Note:
2. Parameter guaranteed by design.
©1993 Fairchild Semiconductor Corporation
74VHC14 Rev. 1.3.0
www.fairchildsemi.com
4
74VHC14 — Hex Schmitt Inverter
AC Electrical Characteristics
T
A
=
25°C
Symbol
t
PLH
, t
PHL
T
A
=
–40°C
to +85°C
Min.
1.0
1.0
1.0
1.0
Parameter
Propagation Delay
V
CC
(V)
3.3 ± 0.3
5.0 ± 0.5
Conditions
C
L
=
15pF
C
L
=
50pF
C
L
=
15pF
C
L
=
50pF
V
CC
=
Open
(3)
Min.
Typ.
8.3
10.8
5.5
7.0
4
21
Max.
12.8
16.3
8.6
10.6
10
Max.
15.0
18.5
10.0
12.0
10
Units
ns
ns
pF
pF
C
IN
C
PD
Input Capacitance
Power Dissipation
Capacitance
Note:
3. C
PD
is defined as the value of the internal equivalent capacitance which is calculated from the operating
current consumption without load. Average operating current can be obtained by the equation:
I
CC
(opr.)
=
C
PD
• V
CC
• f
IN
+ I
CC
/ 6 (per gate).
©1993 Fairchild Semiconductor Corporation
74VHC14 Rev. 1.3.0
www.fairchildsemi.com
5
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