FAIRCHILD 74LCX27_05

Revised February 2005
74LCX27
Low Voltage Triple 3-Input NOR Gate
with 5V Tolerant Inputs
General Description
Features
The LCX27 contains three 3-input NOR gates. The inputs
tolerate voltages up to 7V allowing the interface of 5V systems to 3V systems.
■ 5V tolerant inputs
The 74LCX27 is fabricated with advanced CMOS technology to achieve high speed operation while maintaining
CMOS low power dissipation.
■ 2.3V–3.6V VCC specifications provided
■ 4.9 ns tPD max (VCC
3.3V), 10 PA ICC max
■ Power down high impedance inputs and outputs
■ r24 mA output drive (VCC
3.0V)
■ Implements patented noise/EMI reduction circuitry
■ Latch-up performance exceeds 500 mA
■ ESD performance:
Human body model ! 2000V
Machine model ! 200V
Ordering Code:
Order Number
74LCX27M
74LCX27SJ
Package Number
Package Description
M14A
14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150" Narrow
M14D
Pb-Free 14-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
74LCX27MTC
MTC14
14-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
74LCX27MTCX_NL
(Note 1)
MTC14
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.
© 2005 Fairchild Semiconductor Corporation
DS500454
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74LCX27 Low Voltage Triple 3-Input NOR Gate with 5V Tolerant Inputs
February 2001
74LCX27
Logic Symbol
Connection Diagram
IEEE/IEC
Pin Descriptions
Truth Table
Pin Names
Description
A n , B n , Cn
Inputs
On
Outputs
Inputs
Cn
On
H
X
X
L
X
H
X
L
X
X
H
L
L
2
Output
Bn
An
H
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An Bn Cn
On
HIGH Voltage Level
L
L
L
LOW Voltage Level
H
X
Immaterial
Symbol
Parameter
VCC
Supply Voltage
VI
DC Input Voltage
VO
DC Output Voltage
IIK
DC Input Diode Current
IOK
DC Output Diode Current
Value
IO
DC Output Source/Sink Current
ICC
DC Supply Current per Supply Pin
IGND
DC Ground Current per Ground Pin
TSTG
Storage Temperature
Conditions
0.5 to 7.0
0.5 to 7.0
0.5 to VCC 0.5
50
50
50
r50
r100
r100
65 to 150
Units
V
V
Output in HIGH or LOW State (Note 3)
VI GND
V
mA
VO GND
mA
VO ! VCC
mA
mA
mA
qC
Recommended Operating Conditions (Note 4)
Symbol
VCC
Parameter
Min
Max
Operating
2.0
3.6
Data Retention
1.5
3.6
Supply Voltage
VI
Input Voltage
VO
Output Voltage
IOH/IOL
Output Current
HIGH or LOW State
TA
Free-Air Operating Temperature
't/'V
Input Edge Rate, VIN
0.8V–2.0V, VCC
VCC
3.0V 3.6V
VCC
2.7V - 3.0V
VCC
2.3V - 2.7V
Units
V
0
5.5
V
0
VCC
V
r24
r12
r8
mA
40
85
qC
0
10
ns/V
3.0V
Note 2: The Absolute Maximum Ratings are those values beyond which the safety of the device cannot be guaranteed. The device should not be operated
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: IO Absolute Maximum Rating must be observed.
Note 4: Unused inputs must be held HIGH or LOW. They may not float.
DC Electrical Characteristics
Symbol
VIH
VIL
VOH
VOL
Parameter
Conditions
HIGH Level Input Voltage
LOW Level Input Voltage
HIGH Level Output Voltage
LOW Level Output Voltage
Min
2.3 2.7
1.7
2.7 3.6
2.0
40qC to 85qC
V
2.3 2.7
0.7
0.8
100 PA
8 mA
2.3 3.6
2.3
1.8
IOH
12 mA
2.7
2.2
IOH
18 mA
3.0
2.4
2.2
Units
Max
2.7 3.6
IOH
V
VCC 0.2
V
IOH
24 mA
3.0
IOL
100 PA
2.3 3.6
IOL
8mA
2.3
0.6
IOL
12 mA
2.7
0.4
IOL
16 mA
3.0
0.4
IOL
24 mA
0.2
V
3.0
0.55
2.3 3.6
r5.0
PA
0
10
PA
VCC or GND
2.3 3.6
10
3.6V d VI d 5.5V
2.3 3.6
r10
VCC 0.6V
2.3 3.6
500
Input Leakage Current
0 d VI d 5.5V
IOFF
Power-Off Leakage Current
VI or VO
ICC
Quiescent Supply Current
VI
Increase in ICC per Input
TA
(V)
IOH
II
'ICC
VCC
VIH
5.5V
3
PA
PA
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74LCX27
Absolute Maximum Ratings(Note 2)
74LCX27
AC Electrical Characteristics
TA
Symbol
Parameter
VCC
VCC
2.7V
50pF
CL
50pF
CL
tPHL
Propagation Delay
tPLH
tOSHL
40qC to 85qCF, RL
3.3V r 0.3V
500:
VCC
2.5V r 0.2V
CL
Min
Max
Min
Max
Min
Max
1.5
4.9
1.5
5.8
1.5
5.9
1.5
4.9
1.5
5.8
1.5
5.9
Output to Output Skew (Note 5)
1.0
tOSLH
Units
30pF
ns
ns
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 (tOSHL) or LOW-to-HIGH (tOSLH).
Dynamic Switching Characteristics
Symbol
VOLP
VOLV
Parameter
Quiet Output Dynamic Peak VOL
Quiet Output Dynamic Valley V OL
VCC
Conditions
TA
25qC
(V)
Typical
CL
50 pF, VIH
3.3V, VIL
0V
3.3
0.8
CL
30 pF, VIH
2.5V, VIL
0V
2.5
0.6
CL
50 pF, VIH
3.3V, VIL
0V
3.3
0.8
CL
30 pF, VIH
2.5V, VIL
0V
2.5
0.6
Unit
V
V
Capacitance
Symbol
Parameter
Conditions
CIN
Input Capacitance
VCC
Open, VI
COUT
Output Capacitance
VCC
3.3V, VI
0V or VCC
CPD
Power Dissipation Capacitance
VCC
3.3V, VI
0V or VCC, f
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4
0V or VCC
10 MHz
Typical
Units
7
pF
8
pF
25
pF
74LCX27
AC LOADING and WAVEFORMS Generic for LCX Family
FIGURE 1. AC Test Circuit (CL includes probe and jig capacitance)
Test
Switch
tPLH, tPHL
Open
tPZL, tPLZ
6V at VCC 3.3 r 0.3V
VCC x 2 at VCC 2.5 r 0.2V
tPZH,tPHZ
GND
Waveform for Inverting and Non-Inverting Functions
3-STATE Output High Enable and
Disable Times for Logic
Propagation Delay. Pulse Width and trec Waveforms
Setup Time, Hold Time and Recovery Time for Logic
trise and tfall
3-STATE Output Low Enable and
Disable Times for Logic
FIGURE 2. Waveforms
(Input Characteristics; f =1MHz, tr = tf = 3ns)
Symbol
VCC
3.3V r 0.3V
2.7V
2.5V r 0.2V
Vmi
1.5V
1.5V
VCC/2
Vmo
1.5V
1.5V
VCC/2
Vx
VOL 0.3V
VOL 0.3V
VOL 0.15V
Vy
VOH 0.3V
VOH 0.3V
VOH 0.15V
5
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74LCX27
Schematic Diagram Generic for LCX Family
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6
74LCX27
Physical Dimensions inches (millimeters) unless otherwise noted
14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150" Narrow
Package Number M14A
7
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74LCX27
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
Pb-Free 14-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
Package Number M14D
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8
74LCX27 Low Voltage Triple 3-Input NOR Gate with 5V Tolerant Inputs
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
14-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
Package Number MTC14
Fairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and
Fairchild reserves the right at any time without notice to change said circuitry and specifications.
LIFE SUPPORT POLICY
FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT
DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD
SEMICONDUCTOR CORPORATION. As used herein:
2. A critical component in any component of a life support
device or system whose failure to perform can be reasonably expected to cause the failure of the life support
device or system, or to affect its safety or effectiveness.
1. Life support devices or systems are devices or systems
which, (a) are intended for surgical implant into the
body, or (b) support or sustain life, and (c) whose failure
to perform when properly used in accordance with
instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the
user.
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