STMICROELECTRONICS 74LCX14_06

74LCX14
Low voltage CMOS HEX SCHMITT inverter
with 5V tolerant inputs
Features
■
5V tolerant inputs
■
High speed:
– tPD = 5.0ns (Max) at VCC = 3V
■
Power down protection on inputs and outputs
■
Symmetrical output impedance:
– |IOH| = IOL = 24mA (Min) at VCC = 3V
■
PCI bus levels guaranteed at 24mA
■
Balanced propagation delays:
– tPLH ≅ tPHL
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 C2MOS
technology. It is ideal for low power and high
speed 3.3V applications. It can be interfaced to
5V signal environment for inputs.
■
Operating voltage range:
– VCC (Opr) = 2.0V to 3.6V
■
Pin and function compatible with
74 series 14
■
Latch-up performance exceeds
500mA (JESD 17)
■
ESD performance:
– HBM > 2000V
(MIL STD 883 method 3015); MM > 200V
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.
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
July 2006
Part number
Package
Packaging
74LCX14MTR
SO-14
Tape and reel
74LCX14TTR
TSSOP14
Tape and reel
Rev 6
1/15
www.st.com
15
Contents
74LCX14
Contents
1
Logic symbols and I/O equivalent circuit . . . . . . . . . . . . . . . . . . . . . . . . 3
2
Pin settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3
2.1
Pin connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.2
Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.3
Truth table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
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
1
Logic symbols and I/O equivalent circuit
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.
2.2
Pin connection (top through view)
Pin description
Table 1. Pin description
2.3
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
VCC
Positive supply voltage
Truth table
Table 2. Truth table
4/15
Inputs
Output
A
Y
L
H
H
L
74LCX14
3
Maximum rating
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
Value
Unit
Supply voltage
-0.5 to +7.0
V
VI
DC input voltage
-0.5 to +7.0
V
VO
DC output voltage (VCC = 0V)
-0.5 to +7.0
V
VO
DC output voltage (high or low state) (1)
-0.5 to VCC + 0.5
V
IIK
DC input diode current
-50
mA
IOK
DC output diode current (2)
-50
mA
IO
DC output current
± 50
mA
ICC
DC supply current per supply pin
± 100
mA
IGND
DC ground current per supply pin
± 100
mA
Tstg
Storage temperature
-65 to +150
°C
300
°C
Value
Unit
2.0 to 3.6
V
VCC
TL
Parameter
Lead temperature (10 sec)
1. IO absolute maximum rating must be observed
2. VO < GND
3.1
Recommended operating conditions
Table 4. Recommended operating conditions
Symbol
VCC
Parameter
Supply voltage
(1)
VI
Input voltage
0 to 5.5
V
VO
Output voltage (VCC = 0V)
0 to 5.5
V
VO
Output voltage (high or low state)
0 to VCC
V
IOH, IOL
High or low level output current (VCC = 3.0 to 3.6V)
± 24
mA
IOH, IOL
High or low level output current (VCC = 2.7V)
± 12
mA
-40 to 85
°C
Top
Operating temperature
1. Truth table guaranteed: 1.5V to 3.6V
5/15
Electrical characteristics
4
74LCX14
Electrical characteristics
Table 5. DC specifications
Test condition
Symbol
Parameter
Value
-40 to 85°C
VCC
(V)
Min
Max
Unit
VT+
Positive input
threshold
3.0
1.2
2.2
V
VT-
Negative input
threshold
3.0
0.6
1.5
V
VH
Hysteresis voltage
3.0
0.4
1.2
V
VOH
2.7 to 3.6
IO=-100 µA
VCC-0.2
2.7
IO=-12 mA
2.2
IO=-18 mA
2.4
IO=-24 mA
2.2
High level output
voltage
3.0
VOL
2.7 to 3.6
IO=100 µA
0.2
2.7
IO=12 mA
0.4
IO=16 mA
0.4
IO=24 mA
0.55
VI = 0 to 5.5V
±5
µA
VI or VO = 5.5V
10
µA
VI = VCC or GND
10
VI or VO= 3.6 to 5.5V
± 10
VIH = VCC - 0.6V
500
Low level output
voltage
3.0
II
Input leakage current 2.7 to 3.6
Ioff
Power OFF leakage
current
ICC
Quiescent supply
current
2.7 to 3.6
I incr. per Input
2.7 to 3.6
∆ICC
V
0
V
µA
µA
Table 6. Dynamic switching characteristics
Test condition
Symbol
VOLP
VOLV
Parameter
Dynamic low level quiet
output (1)
TA = 25 °C
VCC
(V)
3.3
Value
Min
CL = 50pF
VIL = 0V, VIH = 3.3V
Typ
Unit
Max
0.8
V
-0.8
1. Number of outputs defined as "n". Measured with "n-1" outputs switching from HIGH to LOW or LOW to
HIGH. The remaining output is measured in the LOW state.
6/15
74LCX14
Electrical characteristics
Table 7. AC electrical characteristics
Test condition
Symbol
tPLH tPHL
tOSLH
tOSHL
Parameter
VCC
(V)
Propagation delay
time
2.7
Output to output
skew time (1) (2)
3.0 to 3.6
3.0 to 3.6
Value
CL
(pF)
RL
(Ω)
ts = tr
(ns)
50
500
2.5
50
500
2.5
-40 to 85 °C
Min
Max
6.5
1.5
Unit
5.0
1.0
ns
ns
1. Skew is defined as the absolute value of the difference between the actual propagation delay for any two
outputs of the same device switching in the same direction, either HIGH or LOW (tOSLH = | tPLHm - tPLHn|,
tOSHL = | tPHLm - tPHLn|)
2. Parameter guaranteed by design
Table 8. Capacitive characteristics
Test condition
Symbol
Parameter
Value
TA = 25 °C
VCC
(V)
Min
Typ
Unit
Max
CIN
Input capacitance
3.3
VIN = 0 to VCC
6
pF
CPD
Power dissipation
capacitance (1)
3.3
fIN = 10MHz
VIN = 0 or VCC
48
pF
1. CPD is defined as the value of the IC’s internal equivalent capacitance which is calculated from the
operating current consumption without load. (Refer to Test Circuit). Average operating current can be
obtained by the following equation. ICC(opr) = CPD x VCC x fIN + ICC/6 (per gate)
7/15
Test circuit
5
74LCX14
Test circuit
Figure 4.
Test circuit
CL = 50pF or equivalent (includes jig and probe capacitance)
RL = 500Ω or equivalent
RT = ZOUT of pulse generator (typically 50Ω)
6
Waveforms
Figure 5.
8/15
Waveform - propagation delay (f = 1MHz; 50% duty cycle)
74LCX14
7
Package mechanical data
Package mechanical data
In order to meet environmental requirements, ST offers these devices in ECOPACK®
packages. These packages have a Lead-free second level interconnect . The category of
second level interconnect is marked on the package and on the inner box label, in
compliance with JEDEC Standard JESD97. The maximum ratings related to soldering
conditions are also marked on the inner box label. ECOPACK is an ST trademark.
ECOPACK specifications are available at: www.st.com
9/15
Package mechanical data
74LCX14
SO-14 MECHANICAL DATA
DIM.
mm.
MIN.
TYP
inch
MAX.
MIN.
TYP.
MAX.
A
1.35
1.75
0.053
0.069
A1
0.1
0.25
0.004
0.010
A2
1.10
1.65
0.043
0.065
B
0.33
0.51
0.013
0.020
C
0.19
0.25
0.007
0.010
D
8.55
8.75
0.337
0.344
E
3.8
4.0
0.150
0.157
e
1.27
0.050
H
5.8
6.2
0.228
0.244
h
0.25
0.50
0.010
0.020
L
0.4
1.27
0.016
0.050
k
0°
8°
0°
8°
ddd
0.100
0.004
0016019D
10/15
74LCX14
Package mechanical data
TSSOP14 MECHANICAL DATA
mm.
inch
DIM.
MIN.
TYP
A
MAX.
MIN.
TYP.
MAX.
1.2
A1
0.05
A2
0.8
b
0.047
0.15
0.002
0.004
0.006
1.05
0.031
0.039
0.041
0.19
0.30
0.007
0.012
c
0.09
0.20
0.004
0.0089
D
4.9
5
5.1
0.193
0.197
0.201
E
6.2
6.4
6.6
0.244
0.252
0.260
E1
4.3
4.4
4.48
0.169
0.173
0.176
1
e
0.65 BSC
K
0˚
L
0.45
A
0.60
0.0256 BSC
8˚
0˚
0.75
0.018
8˚
0.024
0.030
A2
A1
b
e
K
c
L
E
D
E1
PIN 1 IDENTIFICATION
1
0080337D
11/15
Package mechanical data
74LCX14
Tape & Reel SO-14 MECHANICAL DATA
mm.
inch
DIM.
MIN.
A
MAX.
MIN.
330
13.2
TYP.
MAX.
12.992
C
12.8
D
20.2
0.795
N
60
2.362
T
12/15
TYP
0.504
22.4
0.519
0.882
Ao
6.4
6.6
0.252
0.260
Bo
9
9.2
0.354
0.362
Ko
2.1
2.3
0.082
0.090
Po
3.9
4.1
0.153
0.161
P
7.9
8.1
0.311
0.319
74LCX14
Package mechanical data
Tape & Reel TSSOP14 MECHANICAL DATA
mm.
inch
DIM.
MIN.
A
TYP
MAX.
MIN.
330
MAX.
12.992
C
12.8
D
20.2
0.795
N
60
2.362
T
13.2
TYP.
0.504
22.4
0.519
0.882
Ao
6.7
6.9
0.264
0.272
Bo
5.3
5.5
0.209
0.217
Ko
1.6
1.8
0.063
0.071
Po
3.9
4.1
0.153
0.161
P
7.9
8.1
0.311
0.319
13/15
Revision history
8
74LCX14
Revision history
Table 9. Revision history
14/15
Date
Revision
Changes
15-Sep-2004
5
Ordering codes revision - pag. 1.
10-Jul-2006
6
New template, temperature ranges updated
74LCX14
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