Low voltage CMOS HEX SCHMITT inverter
Features
■ 5V tolerant inputs
■ High speed:
–t
= 5.0ns (Max) at V
PD
■ Power down protection on inputs and outputs
■ Symmetrical output impedance:
–|I
■ PCI bus levels guaranteed at 24mA
■ Balanced propagation delays:
–t
■
Operating voltage range:
–V
■ Pin and function compatible with
| = IOL = 24mA (Min) at VCC = 3V
OH
≅ t
PLH
PHL
(Opr) = 2.0V to 3.6V
CC
74 series 14
■ Latch-up performance exceeds
500mA (JESD 17)
■ ESD performance:
– HBM > 2000V
(MIL STD 883 method 3015); MM > 200V
CC
= 3V
74LCX14
with 5V tolerant inputs
SO-14 TSSOP14
Description
The 74LCX14 is a low voltage CMOS HEX
SCHMITT inverter fabricated with sub-micron
silicon gate and double-layer metal wiring C
technology. It is ideal for low power and high
speed 3.3V applications. It can be interfaced to
5V signal environment for inputs.
It has same speed performance at 3.3V than 5V
AC/ACT family, combined with a lower power
consumption.
Pin configuration and function are the same as
those of the 74LCX04 but the 74LCX14 has
hysteresis between the positive and negative
input threshold typically of 0.8V.
2
MOS
This together with its schmitt trigger function
allows it 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 2KV ESD immunity and transient excess
voltage.
Order codes
Part number Package Packaging
74LCX14MTR SO-14 Tape and reel
74LCX14TTR TSSOP14 Tape and reel
July 2006 Rev 6 1/15
www.st.com
15
Contents 74LCX14
Contents
1 Logic symbols and I/O equivalent circuit . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Pin settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.1 Pin connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.3 Truth table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3 Maximum rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.1 Recommended operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
5 Test circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
6 Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
7 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
8 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
2/15
74LCX14 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
3/15
Pin settings 74LCX14
2 Pin settings
2.1 Pin connection
Figure 3. Pin connection (top through view)
2.2 Pin description
Table 1. Pin description
Pin N° 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 (0V)
14 V
2.3 Truth table
Table 2. Truth table
Inputs Output
CC
AY
LH
HL
Positive supply voltage
4/15
74LCX14 Maximum rating
3 Maximum rating
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. refer also to the STMicroelectronics sure
program and other relevant quality documents.
Table 3. Absolute maximum ratings
Symbol Parameter Value Unit
V
I
I
I
GND
T
1. IO absolute maximum rating must be observed
2. VO < GND
Supply voltage -0.5 to +7.0 V
CC
V
DC input voltage -0.5 to +7.0 V
I
DC output voltage (VCC = 0V)
V
O
V
DC output voltage (high or low state)
O
I
DC input diode current -50 mA
IK
DC output diode current
OK
I
DC output current ± 50 mA
O
DC supply current per supply pin ± 100 mA
CC
(2)
(1)
-0.5 to +7.0 V
-0.5 to VCC + 0.5
-50 mA
DC ground current per supply pin ± 100 mA
Storage temperature -65 to +150 °C
stg
T
Lead temperature (10 sec) 300 °C
L
V
3.1 Recommended operating conditions
Table 4. Recommended operating conditions
Symbol Parameter Value Unit
V
V
V
V
Supply voltage
CC
Input voltage 0 to 5.5 V
I
Output voltage (VCC = 0V)
O
Output voltage (high or low state)
O
IOH, IOLHigh or low level output current (VCC = 3.0 to 3.6V)
I
, IOLHigh or low level output current (VCC = 2.7V)
OH
T
1. Truth table guaranteed: 1.5V to 3.6V
Operating temperature -40 to 85 °C
op
(1)
5/15
2.0 to 3.6 V
0 to 5.5 V
0 to V
CC
± 24 mA
± 12 mA
V
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