®
74LCX14
LOW VOLTAGE CMOS HEX SCHMITT INVERTER
WITH 5V TOLERANT INPUTS
s
s
s
s
s
s
s
s
s
s
5V TOLERANT INPUTS
HIGH SPEED:
t
PD
= 6.5 ns (MAX.) at V
CC
= 3.0V
POWER-DOWN PROTECTION ON INPUTS
AND OUTPUTS
SYMMETRICAL OUTPUT IMPEDANCE:
|I
OH
| = I
OL
= 24 mA (MIN)
PCI BUS LEVELS GUARANTEED AT 24mA
BALANCED PROPAGATION DELAYS:
t
PLH
≅
t
PHL
OPERATING VOLTAGE RANGE:
V
CC
(OPR) = 2.0V to 3.6V (1.5V Data Retention)
PIN AND FUNCTION COMPATIBLE WITH
74 SERIES 14
LATCH-UP PERFORMANCE EXCEEDS 500mA
ESD PERFORMANCE:
HBM >2000V; MM > 200V
M
(Micro Package)
T
(TSSOP Package)
ORDER CODES :
74LCX14M
74LCX14T
AC/ACT family, combined with a lower power
consumption.
Pin configuration and function are the same as
those of the LCX04 but the LCX14 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.
DESCRIPTION
The LCX14 is a low voltage CMOS HEX
SCHMITT INVERTER fabricated with sub-micron
silicon gate and double-layer metal wiring C
2
MOS
technology. It is ideal for low power and high
speed 3.3V applications; it can be interfaced to
5V signal enviroment for inputs.
It has same speed performance at 3.3V than 5V,
PIN CONNECTION AND IEC LOGIC SYMBOLS
February 1999
1/8
74LCX14
INPUT AND OUTPUT EQUIVALENT CIRCUIT
PIN DESCRIPTION
PIN No
1, 3, 5, 9,
11, 13
2, 4, 6, 8,
10, 12
7
14
SYMBOL
1A to 6A
1Y to 6Y
GND
V
CC
NAME AND FUNCT ION
Data Inputs
Data Outputs
Ground (0V)
Positive Supply Voltage
TRUTH TABLE
A
L
H
Y
H
L
ABSOLUTE MAXIMUM RATINGS
Symbol
V
CC
V
I
V
O
V
O
I
IK
I
OK
I
O
I
CC
I
GND
T
stg
T
L
Supply Voltage
DC Input Voltage
DC Output Voltage (V
CC
=0V)
DC Output Voltage (High or Low State) (note1)
DC Input Diode Current
DC Output Diode Current (note2)
DC Output Source/Sink Current
DC Supply Current per Supply Pin
DC Ground Current per Supply Pin
Storage Temperature
Lead Temperature (10 sec)
Parameter
Value
-0.5 to + 7.0
-0.5 to + 7.0
-0.5 to + 7.0
-0.5 to V
CC
+ 0.5
- 50
±
50
±
50
±
100
±
100
-65 to +150
300
Unit
V
V
V
V
mA
mA
mA
mA
mA
o
o
C
C
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied.
1) I
O
absolute maximum rating must be observed
2) V
O
< GND, V
O
> V
CC
2/8
74LCX14
RECOMMENDED OPERATING CONDITIONS
Symbol
V
CC
V
I
V
O
V
O
I
OH
, I
OL
I
OH
, I
OL
T
op
Input Voltage
Output Voltage (V
CC
= 0V)
Output Voltage (High or Low State)
High or Low Level Output Current (V
CC
= 3.0 to 3.6V)
High or Low Level Output Current (V
CC
= 2.7 to 3.0V)
Operating Temperature:
Parameter
Supply Voltage (note 1)
Value
2.0 to 3.6
0 to 5.5
0 to 5.5
0 to V
CC
±
24
±
12
-40 to +85
Unit
V
V
V
V
mA
mA
o
C
1) Truth Table guaranteed: 1.5V to3.6V
DC SPECIFICATIONS
Symb ol
Parameter
V
CC
(V)
V
t+
V
t-
V
H
V
OH
Positive Input Threshold
Negative Input Threshold
Hysterisis Voltage
High Level Output Voltage
3.0
3.0
3.0
2.7 to 3.6
2.7
3.0
V
OL
Low Level Output Voltage
2.7 to 3.6
2.7
3.0
3.0
I
I
I
off
I
CC
Input Leakage Current
Power Off Leakage Current
Quiescent Supply Current
2.7 to 3.6
0
2.7 to 3.6
V
I
=
V
I H
V
I
=
V
IL
I
O
=-12 mA
I
O
=-18 mA
I
O
=-24 mA
I
O
=100
µA
I
O
=12 mA
I
O
=16 mA
I
O
=24 mA
V
I
= 0 to 5.5 V
V
I
or V
O
= 5.5V
V
I
= V
CC
or GND
V
I
or V
O
=
3.6 to 5.5V
∆
I
CC
ICC incr. per input
2.7 to 3.6
V
IH
= V
CC
-0.6V
Test Co nditi ons
Value
-40 to 85 C
Min.
1.2
0.6
0.4
I
O
=-100
µA
V
CC
-0.2
2.2
2.4
2.2
0.2
0.4
0.4
0.55
±
5
100
10
±10
500
µ
A
µ
A
µA
µ
A
V
V
Max.
2.2
1.5
1.2
V
V
V
o
Un it
DYNAMIC SWITCHING CHARACTERISTICS
Symb ol
Parameter
V
CC
(V)
V
OLP
V
OLV
Dynamic Low Voltage Quiet Output
(note 1)
3.3
C
L
= 50 pF
V
IL
= 0 V
V
IH
= 3.3V
Test Con dition s
Min .
Value
T
A
= 25 C
T yp.
0.8
-0.8
V
Max.
o
Un it
1) Number ofoutputs defined as ”n”. Measured with”n-1” outputs switching from HIGH to LOW or LOW t o HIGH. The remaining output is measured in
the LOW state.
3/8
74LCX14
AC ELECTRICAL CHARACTERISTICS
(C
L
= 50 pF, R
L
= 500
Ω,
Input t
r
= t
f
= 2.5 ns)
Symb ol
Parameter
V
CC
(V)
t
PLH
t
PHL
t
OSLH
t
OSHL
Propagation Delay Time
Output to Output Skew Time (note 1, 2)
2.7
3.0 to 3.6
3.0 to 3.6
Test Con dition
Waveform
Value
-40 to 85
o
C
Min. Max.
6.0
1.5
6.5
1.0
Un it
1
ns
ns
1) Skew is defined as the absolute value of the difference between the actual propagation delay for any twooutputs of the same device switching in the
same direction, either HIGH or LOW (t
OSLH
= |t
PLHm
- t
PLHn
|, t
OSHL
= |t
PHLm
- t
pHLn
|)
2) Parameter guaranteed by design
CAPACITIVE CHARACTERISTICS
Symb ol
Parameter
V
CC
(V)
C
IN
C
PD
Input Capacitance
Power Dissipation Capacitance (note 1)
3.3
3.3
V
IN
= 0 to V
CC
f
IN
= 10MHz
V
IN
= 0 or V
CC
Test Co nditi ons
Min.
Valu e
T
A
= 25 C
T yp.
6
48
Max.
pF
pF
o
Un it
1) C
PD
isdefined as the value of the IC’sinternal equivalent capacitance which is calculated fromthe operating current consumption without load. Average
operting current can be obtained by the following equation. I
CC
(opr) = C
PD
•
V
CC
•
f
IN
+ I
CC
/6 (per gate)
4/8
74LCX14
TEST CIRCUIT
C
L
= 50 pF or equivalent (includes jigand probe capacitance)
R
L
= 500Ω or equivalent
R
T
= Z
OUT
of pulse generator (typically 50Ω)
WAVEFORM: PROPAGATION DELAYS
(f=1MHz; 50% duty cycle)
5/8
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