74LCX38 Low Voltage Quad 2-Input NAND Gate (Open Drain) with 5V Tolerant Inputs
October 1995
Revised February 2005
74LCX38
Low Voltage Quad 2-Input NAND Gate (Open Drain)
with 5V Tolerant Inputs
General Description
The LCX38 contains four 2-input open drain NAND gates.
The inputs tolerate voltages up to 7V allowing the interface
of 5V systems to 3V systems.
The 74LCX38 is fabricated with advanced CMOS technol-
ogy to achieve high speed operation while maintaining
CMOS low power dissipation.
Features
s
5V tolerant inputs
s
2.3V to 3.6V V
CC
specifications provided
s
5.0 ns t
PD
max (V
CC
3.3V), 10
P
A I
CC
max
3.0V)
s
Power down high impedance inputs and outputs
s
24 mA output drive (V
CC
s
Implements proprietary noise/EMI reduction circuitry
s
Latch-up performance exceeds 500 mA
s
ESD performance:
Human body model
!
2000V
Machine model
!
150V
Ordering Code:
Order Number
74LCX38M
74LCX38MX_NL
(Note 1)
74LCX38SJ
74LCX38MTC
74LCX38MTCX_NL
(Note 1)
Package
Number
M14A
M14A
M14D
MTC14
MTC14
Package Description
14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150" Narrow
Pb-Free 14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150" Narrow
Pb-Free 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
Pb-Free 14-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm
Wide
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Pb-Free package per JEDEC J-STD-020B.
Note 1:
“_NL” indicates Pb-Free package (per JEDEC J-STD-020B). Device available in Tape and Reel only.
Logic Symbol
IEEE/IEC
Connection Diagram
Pin Descriptions
Pin Names
A
n
, B
n
O
n
© 2005 Fairchild Semiconductor Corporation
DS012574
Description
Inputs
Outputs
www.fairchildsemi.com
74LCX38
Absolute Maximum Ratings
(Note 2)
Symbol
V
CC
V
I
V
O
I
IK
I
OK
I
O
I
CC
I
GND
T
STG
Parameter
Supply Voltage
DC Input Voltage
DC Output Voltage
DC Input Diode Current
DC Output Diode Current
DC Output Sink Current (I
OL
)
DC Supply Current per Supply Pin
DC Ground Current per Ground Pin
Storage Temperature
Value
Conditions
Units
V
V
Output in HIGH or LOW State (Note 3)
V
I
GND
V
O
GND
V
mA
mA
mA
mA
mA
0.5 to
7.0
0.5 to
7.0
0.5 to
7.0
50
50
50
r
100
r
100
65 to
150
q
C
Recommended Operating Conditions
(Note 4)
Symbol
V
CC
V
I
V
O
I
OL
Supply Voltage
Input Voltage
Output Voltage
Output Current
V
CC
V
CC
V
CC
T
A
Free-Air Operating Temperature
Input Edge Rate, V
IN
0.8V–2.0V, V
CC
3.0V
3.0V
3.6V
2.7V
3.0V
2.3V
2.7V
Parameter
Operating
Data Retention
Min
2.0
1.5
0
0
Max
3.6
3.6
5.5
5.5
24
12
8
mA
Units
V
V
V
40
0
85
10
q
C
ns/V
'
t/
'
V
Note 2:
The Absolute Maximum Ratings are those beyond which the safety of the device cannot be guaranteed. The device should not be operating at these
limits. The parametric values defined in the Electrical Characteristics tables are not guaranteed at the Absolute Maximum Ratings. The “Recommended
Operating Conditions” table will define the conditions for actual device operation.
Note 3:
I
O
Absolute Maximum Rating must be observed.
Note 4:
Unused inputs must be held HIGH or LOW. They may not float.
DC Electrical Characteristics
Symbol
V
IH
V
IL
V
OL
Parameter
HIGH Level Input Voltage
LOW Level Input Voltage
LOW Level Output Voltage
I
OL
I
OL
I
OL
I
OL
I
I
I
OFF
I
CC
Input Leakage Current
Power-Off Leakage Current
Quiescent Supply Current
Increase in I
CC
per Input
Off State Current
100
P
A
12 mA
16 mA
24 mA
5.5V
Conditions
V
CC
(V)
2.3
2.7
2.7
3.6
2.3
2.7
2.3
3.6
2.3
3.6
2.3
2.7
3.0
3.0
2.3
3.6
0
2.3
3.6
2.3
3.6
2.3
3.6
2 - 3.6
I
OL
= 8mA
T
A
40
q
C to
85
q
C
Max
Min
1.7
2.0
Units
V
0.7
0.8
0.2
0.6
0.4
0.4
0.55
V
V
0
d
V
I
d
5.5V
V
I
or V
O
V
I
V
IH
V
O
V
CC
or GND
V
CC
0.6V
5.5
r
5.0
10
10
P
A
P
A
P
A
P
A
P
A
3.6V
d
V
I
d
5.5V
r
10
500
10
'
I
CC
I
OHZ
www.fairchildsemi.com
2
74LCX38
AC Electrical Characteristics
T
A
Symbol
Parameter
V
CC
3.3V
r
0.3V
40
q
C to
85
q
C, R
L
V
CC
C
L
Min
1.5
1.5
2.7V
50 pF
Max
5.5
5.5
500
:
V
CC
C
L
Min
1.5
1.5
2.5V
r
0.2V
30 pF
Max
6.5
6.0
ns
ns
Units
C
L
50 pF
Min
t
PZL
t
PLZ
t
OSHL
t
OSLH
Output to Output Skew
(Note 5)
Propagation Delay Time
1.5
1.5
Max
5.0
5.0
1.0
1.0
Note 5:
Skew is defined as the absolute value of the difference between the actual propagation delay for any two separate outputs of the same device. The
specification applies to any outputs switching in the same direction, either HIGH-to-LOW (t
OSHL
) or LOW-to-HIGH (t
OSLH
).
Dynamic Switching Characteristics
Symbol
V
OLP
V
OLV
Parameter
Quiet Output Dynamic Peak V
OL
Quiet Output Dynamic Valley V
OL
C
L
C
L
C
L
C
L
50 pF, V
IH
30 pF, V
IH
50 pF, V
IH
30 pF, V
IH
Conditions
3.3V, V
IL
2.5V, V
IL
3.3V, V
IL
2.5V, V
IL
0V
0V
0V
0V
V
CC
(V)
3.3
2.5
3.3
2.5
T
A
25
q
C
0.8
0.6
Typical
Units
V
V
0.8
0.6
Capacitance
Symbol
C
IN
C
OUT
C
PD
Input Capacitance
Output Capacitance
Power Dissipation Capacitance
Parameter
V
CC
V
CC
V
CC
Open, V
I
3.3V, V
I
3.3V, V
I
Conditions
0V or V
CC
0V or V
CC
0V or V
CC
, f
10 MHz
Typical
7
8
25
Units
pF
pF
pF
3
www.fairchildsemi.com
74LCX38
AC Loading and Waveforms
Generic for LCX Family
FIGURE 1. AC Test Circuit
(C
L
includes probe and jig capacitance)
Test
t
PZL
, t
PLZ
Switch
6V at V
CC
3.3
r
0.3V
V
CC
x 2 at V
CC
2.5
r
0.2V
3-STATE Output Low Enable and
Disable Times for Logic
t
rise
and t
fall
FIGURE 2. Waveforms
(Input Pulse Characteristics; f = 1MHz, t
r
= t
f
= 3ns)
Symbol
V
mi
V
mo
V
x
V
y
V
CC
3.3V
r
0.3V
1.5V
1.5V
V
OL
0.3V
V
OH
0.3V
2.7V
1.5V
1.5V
V
OL
0.3V
V
OH
0.3V
2.5V
r
0.2V
V
CC
/2
V
CC
/2
V
OL
0.15V
V
OH
0.15V
www.fairchildsemi.com
4
74LCX38
Physical Dimensions
inches (millimeters) unless otherwise noted
14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150" Narrow
Package Number M14A
5
www.fairchildsemi.com
