© 1999 Fairchild Semiconductor Corporation
DS012574
www.fairchildsemi.com
October 1995
Revised June 1999
7
4LCX38 Low
V
o
l
t
age Quad
2-I
nput
NAND Gat
e
(
O
pen Dr
ain)
wi
th
5V T
o
l
e
ran
t
Input
s
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
2.3V3.6V V
CC
specifications provided
s
6.5 ns t
PD
max (V
CC
=
3.3V), 10
µ
A I
CC
max
s
Power down high impedance inputs and outputs
s
±
24 mA output drive (V
CC
=
3.0V)
s
Implements patented noise/EMI reduction circuitry
s
Latch-up performance exceeds 500 mA
s
ESD performance:
Human body model
>
2000V
Machine model
>
150V
Ordering Code:
Devices also available in Tape and Reel. Specify by appending the suffix letter "X" to the ordering code.
Logic Symbol
IEEE/IEC
Connection Diagram
Pin Descriptions
Order Number
Package Number
Package Description
74LCX38M
M14A
14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-120, 0.150" Narrow
74LCX38SJ
M14D
14-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
74LCX38MTC
MTC14
14-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
Pin Names
Description
A
n
, B
n
Inputs
O
n
Outputs
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2
74L
C
X
38
Absolute Maximum Ratings
(Note 1)
Recommended Operating Conditions
(Note 3)
Note 1: 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 2: I
O
Absolute Maximum Rating must be observed.
Note 3: Unused inputs must be held HIGH or LOW. They may not float.
DC Electrical Characteristics
Symbol
Parameter
Value
Conditions
Units
V
CC
Supply Voltage
-
0.5 to
+
7.0
V
V
I
DC Input Voltage
-
0.5 to
+
7.0 V
V
O
DC Output Voltage
-
0.5 to V
CC
+
0.5
Output in HIGH or LOW State (Note 2)
V
I
IK
DC Input Diode Current
-
50
V
I
<
GND
mA
I
OK
DC Output Diode Current
-
50
V
O
<
GND
mA
+
50
V
O
>
V
CC
I
O
DC Output Source/Sink Current
±
50
mA
I
CC
DC Supply Current per Supply Pin
±
100
mA
I
GND
DC Ground Current per Ground Pin
±
100
mA
T
STG
Storage Temperature
-
65 to
+
150
°
C
Symbol
Parameter
Min
Max
Units
V
CC
Supply Voltage
Operating
2.0
3.6
V
Data Retention
1.5
3.6
V
I
Input Voltage
0
5.5
V
V
O
Output Voltage
HIGH or LOW State
0
V
CC
V
I
OH
/I
OL
Output Current
V
CC
=
3.0V
-
3.6V
±
24
mA
V
CC
=
2.7V
-
3.0V
±
12
V
CC
=
2.3V
-
2.7V
±
8
T
A
Free-Air Operating Temperature
-
40
85
°
C
t/
V
Input Edge Rate, V
IN
=
0.8V2.0V, V
CC
=
3.0V
0
10
ns/V
Symbol
Parameter
Conditions
V
CC
T
A
=
-
40
°
C to
+
85
°
C
Units
(V)
Min
Max
V
IH
HIGH Level Input Voltage
2.3
-
2.7
1.7
V
2.7
-
3.6
2.0
V
IL
LOW Level Input Voltage
2.3
-
2.7
0.7
V
2.3
-
3.6
0.8
V
OL
LOW Level Output Voltage
I
OL
=
100
µ
A
2.3
-
3.6
0.2
I
OL
= 8mA
2.3
0.6
I
OL
=
12 mA
2.7
0.4
V
I
OL
=
16 mA
3.0
0.4
I
OL
=
24 mA
3.0
0.55
I
I
Input Leakage Current
0
V
I
5.5V
2.3
-
3.6
±
5.0
µ
A
I
OFF
Power-Off Leakage Current
V
I
or V
O
=
5.5V
0
10
µ
A
I
CC
Quiescent Supply Current
V
I
=
V
CC
or GND
2.3
-
3.6
10
µ
A
3.6V
V
I
5.5V
2.3
-
3.6
±
10
I
CC
Increase in I
CC
per Input
V
IH
=
V
CC
-
0.6V
2.3
-
3.6
500
µ
A
3
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7
4LCX38
AC Electrical Characteristics
Note 4: 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
Capacitance
Symbol
Parameter
T
A
=
-
40
°
C to
+
85
°
C, R
L
=
500
Units
V
CC
=
3.3V
±
0.3V
V
CC
=
2.7V
V
CC
=
2.5V
±
0.2V
C
L
=
50 pF
C
L
=
50 pF
C
L
=
30 pF
Min
Max
Min
Max
Min
Max
t
PZL
Propagation Delay Time
1.5
5.0
1.5
5.5
1.5
6.5
ns
t
PLZ
1.5
5.0
1.5
5.5
1.5
6.0
t
OSHL
Output to Output Skew
1.0
ns
t
OSLH
(Note 4)
1.0
Symbol
Parameter
Conditions
V
CC
(V)
T
A
=
25
°
C
Units
Typical
V
OLP
Quiet Output Dynamic Peak V
OL
C
L
=
50 pF, V
IH
=
3.3V, V
IL
=
0V
3.3
0.8
V
C
L
=
30 pF, V
IH
=
2.5V, V
IL
=
0V
2.5
0.6
V
OLV
Quiet Output Dynamic Valley V
OL
C
L
=
50 pF, V
IH
=
3.3V, V
IL
=
0V
3.3
-
0.8
V
C
L
=
30 pF, V
IH
=
2.5V, V
IL
=
0V
2.5
-
0.6
Symbol
Parameter
Conditions
Typical
Units
C
IN
Input Capacitance
V
CC
=
Open, V
I
=
0V or V
CC
7
pF
C
OUT
Output Capacitance
V
CC
=
3.3V, V
I
=
0V or V
CC
8
pF
C
PD
Power Dissipation Capacitance
V
CC
=
3.3V, V
I
=
0V or V
CC
, f
=
10 MHz
25
pF
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4
74L
C
X
38
AC Loading and Waveforms
Generic for LCX Family
FIGURE 1. AC Test Circuit
(C
L
includes probe and jig capacitance)
Waveform for Inverting and Non-Inverting Functions
Propagation Delay, Pulse Width and t
rec
Waveforms
3-STATE Output High Enable and
Disable TImes for Logic
3-STATE Output Low Enable and
Disable Times for Logic
Setup Time, Hold TIme and Recovery TIme for Logic
t
rise
and t
fall
FIGURE 2. Waveforms
(Input Pulse Characteristics; f=1MHz, t
r
=t
f
=3ns)
Test
Switch
t
PLH
, t
PHL
Open
t
PZL
, t
PLZ
6V at V
CC
=
3.3
±
0.3V
V
CC
x 2 at V
CC
=
2.5
±
0.2V
t
PZH
,t
PHZ
GND
Symbol
V
CC
3.3V
±
0.3V
2.7V
2.5V
±
0.2V
V
mi
1.5V
1.5V
V
CC
/2
V
mo
1.5V
1.5V
V
CC
/2
V
x
V
OL
+
0.3V
V
OL
+
0.3V
V
OL
+
0.15V
V
y
V
OH
-
0.3V
V
OH
-
0.3V
V
OH
-
0.15V
5
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7
4LCX38
Schematic Diagram
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ZIP