ST 74VHC14 User Manual
Features
■ High speed
–t
= 5.5 ns (typ.) at VCC = 5 V
PD
■ Low power dissipation
–I
= 2 μA (max.) at TA = 25 °C
CC
■ Typical hysteresis: V
■ Power-down protection on inputs
= 1 V at VCC = 4.5 V
h
– Symmetrical output impedance
|I
| = IOL = 8 mA (min.)
OH
■ Balanced propagation delay
–t
■ Operating voltage range
–V
■ Pin and function compatible with 74 series 14
■ Improved latch-up immunity
■ Low noise
–V
≅ t
PLH
CC
OLP
PHL
(opr) = 2 V to 5.5 V
= 0.8 V (max.)
Applications
■ Automotive
■ Industrial
■ Computer
■ Consumer
74VHC14
Hex Schmitt inverter
Datasheet − production data
SO-14TSSOP14
Description
The 74VHC14 is an advanced high-speed CMOS
hex Schmitt inverter manufactured with submicron silicon gate and double-layer metal wiring
2
C
MOS technology.
The internal circuit is composed of 3 stages
including a buffer output, which provides high
noise immunity and stable output.
Power-down protection is provided on all inputs
and 0 to 7 V can be accepted on inputs
regardless of the supply voltage. This device can
be used to interface 5 V to 3 V.
Pin configuration and function are the same as
those of the 74VHC04 but the 74VHC14 has
hysteresis.
This along with its Schmitt trigger function allows
the device to be used on line receivers with slow
rise/fall input signals.
All inputs and outputs are equipped with
protection circuits against static discharge, giving
them 2 kV ESD immunity and transient excess
voltage.
Table 1. Device summary
Part number Temperature range Package Packaging
74VHC14TTR -55/+125 °C TSSOP14 Tape and reel
74VHC14YTTR
74VHC14MTR -55/+125 °C SO-14 Tape and reel
1. Qualification and characterization (according to AEC Q100 and Q003 or equivalent) and advanced screening (according to
AEC Q001 and Q002 or equivalent) are ongoing.
June 2012 Doc ID 5741 Rev 8 1/16
This is information on a product in full production.
(1)
-40/+125 °C TSSOP14 (automotive grade) Tape and reel
www.st.com
16
Contents 74VHC14
Contents
1 Logic symbols and I/O equivalent circuit . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Pin settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.1 Pin connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.3 Truth table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.1 Recommended operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
5 Test circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
6 Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
7 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
8 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2/16 Doc ID 5741 Rev 8
74VHC14 Logic symbols and I/O equivalent circuit
1 Logic symbols and I/O equivalent circuit
Figure 1. IEC logic symbols
Figure 2. Input and output equivalent circuit
Doc ID 5741 Rev 8 3/16
Pin settings 74VHC14
2 Pin settings
2.1 Pin connections
Figure 3. Pin connections (top through view)
2.2 Pin description
Table 2. Pin description
Pin number Symbol Name and function
1, 3, 5, 9, 11, 13 1A to 6A Data inputs
2, 4, 6, 8, 10, 12 1Y to 6Y Data outputs
7 GND Ground (0 V)
14 V
2.3 Truth table
Table 3. Truth table
Input Output
CC
AY
LH
HL
Positive supply voltage
4/16 Doc ID 5741 Rev 8
74VHC14 Maximum ratings
3 Maximum ratings
Stressing the device above the rating listed in the “absolute maximum ratings” table may
cause permanent damage to the device. These are stress ratings only and operation of the
device at these or any other conditions above those indicated in the operating sections of
this specification is not implied. Exposure to absolute maximum rating conditions for
extended periods may affect device reliability.
Table 4. Absolute maximum ratings
Symbol Parameter Value Unit
V
I
I
I
GND
T
Supply voltage -0.5 to +7.0 V
CC
DC input voltage -0.5 to +7.0 V
V
I
V
DC output voltage -0.5 to VCC + 0.5 V
O
DC input diode current - 20 mA
I
IK
DC output diode current ± 20 mA
OK
DC output current ± 25 mA
I
O
DC supply current per supply pin ± 50 mA
CC
DC ground current per supply pin ± 50 mA
Storage temperature -65 to +150 °C
stg
Lead temperature (10 sec) 300 °C
T
L
3.1 Recommended operating conditions
Table 5. Recommended operating conditions
Symbol Parameter Value Unit
V
V
V
T
Supply voltage 2 to 5.5 V
CC
Input voltage 0 to 5.5 V
I
Output voltage 0 to V
O
TSSOP14, SO-14 -55 to +125 °C
Operating temperature
op
TSSOP14 (automotive grade) -40 to +125 °C
CC
V
Doc ID 5741 Rev 8 5/16
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