Is Now Part of
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of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of ON Semiconductor’s product/patent coverage may be accessed at www.onsemi.com/site/pdf/Patent-Marking.pdf. ON Semiconductor reserves the right
to make changes without further notice to any products herein. ON Semiconductor makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does ON Semiconductor assume any liability
arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. Buyer is responsible for its products and applications using ON
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Semiconductor data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s
technical experts. ON Semiconductor does not convey any license under its patent rights nor the rights of others. ON Semiconductor products are not designed, intended, or authorized for use as a critical component in life support systems or any FDA
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is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner.
74LCX240
Low Voltage Octal Buffer/Line Driver with 5V Tolerant
Inputs and Outputs
Features
General Description
■ 5V tolerant inputs and outputs
The LCX240 is an inverting octal buffer and line driver
designed to be employed as a memory address driver,
clock driver and bus oriented transmitter or receiver. The
device is designed for low voltage (2.5V or 3.3V) VCC
applications with capability of interfacing to a 5V signal
environment.
■ 2.3V–3.6V VCC specifications provided
■ 6.5ns tPD max. (VCC = 3.3V), 10µA ICC max.
■ Power-down high impedance inputs and outputs
■ Supports live insertion/withdrawal(1)
■ ±24mA output drive (VCC = 3.0V)
■ Implements proprietary noise/EMI reduction circuitry
■ Latch-up performance exceeds 500mA
The LCX240 is fabricated with an advanced CMOS technology to achieve high speed operation while maintaining CMOS low power dissipation.
■ ESD performance:
– Human body model > 2000V
– Machine model > 200V
Note:
1. To ensure the high-impedance state during power up
or down, OE should be tied to VCC through a pull-up
resistor: the minimum value or the resistor is
determined by the current-sourcing capability of the
driver.
Ordering Information
Order
Number
Package
Number
Package Description
74LCX240WM
M20B
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide
74LCX240SJ
M20D
20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
74LCX240MSA
MSA20
20-Lead Shrink Small Outline Package (SSOP), JEDEC MO-150, 5.3mm Wide
74LCX240MTC
MTC20
20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm
Wide
Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering number.
All packages are lead free per JEDEC: J-STD-020B standard.
©1994 Fairchild Semiconductor Corporation
74LCX240 Rev. 1.6.0
www.fairchildsemi.com
74LCX240 — Low Voltage Octal Buffer/Line Driver with 5V Tolerant Inputs and Outputs
January 2008
Logic Diagram
Pin Description
Pin Names
Description
OE1, OE2
3-STATE Output Enable Inputs
I0–I7
Inputs
O0–O7
Outputs
Truth Tables
Inputs
Outputs
OE1
In
(Pins 12, 14, 16, 18)
L
L
H
L
H
L
H
X
Z
Inputs
Outputs
OE2
In
(Pins 3, 5, 7, 9)
L
L
H
L
H
L
H
X
Z
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
Z = High Impedance
©1994 Fairchild Semiconductor Corporation
74LCX240 Rev. 1.6.0
www.fairchildsemi.com
2
74LCX240 — Low Voltage Octal Buffer/Line Driver with 5V Tolerant Inputs and Outputs
Connection Diagram
Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be
operable above the recommended operating conditions and stressing the parts to these levels is not recommended.
In addition, extended exposure to stresses above the recommended operating conditions may affect device reliability.
The absolute maximum ratings are stress ratings only.
Symbol
VCC
Parameter
Rating
Supply Voltage
–0.5V to +7.0V
VI
DC Input Voltage
–0.5V to +7.0V
VO
DC Output Voltage
Output in 3-STATE
–0.5V to +7.0V
Output in HIGH or LOW
State(2)
IIK
DC Input Diode Current, VI < GND
IOK
DC Output Diode Current
–0.5V to VCC + 0.5V
–50mA
VO < GND
–50mA
VO > VCC
+50mA
IO
DC Output Source/Sink Current
±50mA
ICC
DC Supply Current per Supply Pin
±100mA
IGND
DC Ground Current per Ground Pin
±100mA
TSTG
Storage Temperature
–65°C to +150°C
Note:
2. IO Absolute Maximum Rating must be observed.
Recommended Operating Conditions(3)
The Recommended Operating Conditions table defines the conditions for actual device operation. Recommended
operating conditions are specified to ensure optimal performance to the datasheet specifications. Fairchild does not
recommend exceeding them or designing to absolute maximum ratings.
Symbol
VCC
Parameter
Min.
Max.
Units
Operating
2.0
3.6
V
Data Retention
1.5
3.6
0
5.5
V
V
Supply Voltage
VI
Input Voltage
VO
Output Voltage
IOH / IOL
TA
∆t / ∆V
3-STATE
0
5.5
HIGH or LOW State
0
VCC
Output Current
VCC = 3.0V–3.6V
±24
VCC = 2.7V–3.0V
±12
VCC = 2.3V–2.7V
±8
Free-Air Operating Temperature
Input Edge Rate, VIN = 0.8V–2.0V, VCC = 3.0V
mA
–40
85
°C
0
10
ns / V
Note:
3. Unused inputs must be held HIGH or LOW. They may not float.
©1994 Fairchild Semiconductor Corporation
74LCX240 Rev. 1.6.0
www.fairchildsemi.com
3
74LCX240 — Low Voltage Octal Buffer/Line Driver with 5V Tolerant Inputs and Outputs
Absolute Maximum Ratings
TA = –40°C to +85°C
Symbol
VIH
VIL
VOH
VOL
II
Parameter
HIGH Level Input Voltage
LOW Level Input Voltage
HIGH Level Output Voltage
LOW Level Output Voltage
Input Leakage Current
IOFF
Power-Off Leakage Current
ICC
Quiescent Supply Current
∆ICC
Increase in ICC per Input
VCC (V)
Conditions
Min.
2.3–2.7
1.7
2.7–3.6
2.0
Max.
V
2.3–2.7
0.7
2.7–3.6
0.8
2.3–3.6
IOH = –100µA
V
VCC – 0.2
2.3
IOH = –8mA
1.8
2.7
IOH = –12mA
2.2
3.0
IOH = –18mA
2.4
IOH = –24mA
2.2
Units
V
IOL = 100µA
0.2
2.3
IOL = 8mA
0.6
2.7
IOL = 12mA
0.4
3.0
IOL = 16mA
0.4
IOL = 24mA
0.55
0 ≤ VI ≤ 5.5V
±5.0
µA
10
µA
VI = VCC or GND
10
µA
3.6V ≤ VI, VO ≤
±10
2.3–3.6
2.3–3.6
VI or VO = 5.5V
2.3–3.6
2.3–3.6
5.5V(4)
VIH = VCC = 0.6V
V
500
µA
Note:
4. Outputs disabled or 3-STATE only.
AC Electrical Characteristics
TA = –40°C to +85°C, RL = 500Ω
VCC = 3.3V ± 0.3V,
CL = 50pF
Symbol
Parameter
VCC = 2.7V,
CL = 50pF
VCC = 2.5V ± 0.2V,
CL = 30pF
Min.
Max.
Min.
Max.
Min.
Max.
Units
tPHL, tPLH
Propagation Delay
1.5
6.5
1.5
7.5
1.5
7.8
ns
tPZL, tPZH
Output Enable Time
1.5
8.0
1.5
9.0
1.5
10.0
ns
tPLZ, tPHZ
Output Disable Time
1.5
7.0
1.5
8.0
1.5
8.4
ns
tOSHL, tOSLH
Output to Output
Skew(5)
1.0
ns
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-toLOW (tOSHL) or LOW-to-HIGH (tOSLH).
©1994 Fairchild Semiconductor Corporation
74LCX240 Rev. 1.6.0
www.fairchildsemi.com
4
74LCX240 — Low Voltage Octal Buffer/Line Driver with 5V Tolerant Inputs and Outputs
DC Electrical Characteristics
TA = 25°C
Symbol
Parameter
VCC (V)
VOLP
Quiet Output Dynamic Peak VOL
3.3
VOLV
Quiet Output Dynamic Valley VOL
Conditions
Typical
Unit
CL = 50pF, VIH = 3.3V, VIL = 0V
0.8
V
2.5
CL = 30pF, VIH = 2.5V, VIL = 0V
0.6
3.3
CL = 50pF, VIH = 3.3V, VIL = 0V
–0.8
2.5
CL = 30pF, VIH = 2.5V, VIL = 0V
–0.6
V
Capacitance
Symbol
Parameter
Conditions
Typical
Units
Input Capacitance
VCC = Open, VI = 0V or VCC
7
pF
COUT
Output Capacitance
VCC = 3.3V, VI = 0V or VCC
8
pF
CPD
Power Dissipation Capacitance
VCC = 3.3V, VI = 0V or VCC, f = 10MHz
25
pF
CIN
©1994 Fairchild Semiconductor Corporation
74LCX240 Rev. 1.6.0
www.fairchildsemi.com
5
74LCX240 — Low Voltage Octal Buffer/Line Driver with 5V Tolerant Inputs and Outputs
Dynamic Switching Characteristics
Test
Switch
tPLH, tPHL
Open
tPZL, tPLZ
6V at VCC = 3.3 ± 0.3V
VCC x 2 at VCC = 2.5 ± 0.2V
tPZH, tPHZ
GND
Figure 1. AC Test Circuit (CL includes probe and jig capacitance)
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
3-STATE Output Low Enable and
Disable Times for Logic
trise and tfall
VCC
Symbol
3.3V ± 0.3V
2.7V
2.5V ± 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
Figure 2. Waveforms (Input Characteristics; f = 1MHz, tr = tf = 3ns)
©1994 Fairchild Semiconductor Corporation
74LCX240 Rev. 1.6.0
www.fairchildsemi.com
6
74LCX240 — Low Voltage Octal Buffer/Line Driver with 5V Tolerant Inputs and Outputs
AC Loading and Waveforms (Generic for LCX Family)
74LCX240 — Low Voltage Octal Buffer/Line Driver with 5V Tolerant Inputs and Outputs
Schematic Diagram (Generic for LCX Family)
©1994 Fairchild Semiconductor Corporation
74LCX240 Rev. 1.6.0
www.fairchildsemi.com
7
13.00
12.60
A
11.43
20
11
B
9.50
10.65 7.60
10.00 7.40
2.25
1
10
0.51
0.35
PIN ONE
INDICATOR
0.25
M
0.65
1.27
1.27
C B A
LAND PATTERN RECOMMENDATION
2.65 MAX
SEE DETAIL A
0.33
0.20
C
0.75
0.25
X 45°
SEATING PLANE
NOTES: UNLESS OTHERWISE SPECIFIED
(R0.10)
GAGE PLANE
(R0.10)
0.10 C
0.30
0.10
0.25
8°
0°
A) THIS PACKAGE CONFORMS TO JEDEC
MS-013, VARIATION AC, ISSUE E
B) ALL DIMENSIONS ARE IN MILLIMETERS.
C) DIMENSIONS DO NOT INCLUDE MOLD
FLASH OR BURRS.
D) CONFORMS TO ASME Y14.5M-1994
1.27
0.40
SEATING PLANE
E) LANDPATTERN STANDARD: SOIC127P1030X265-20L
(1.40)
DETAIL A
F) DRAWING FILENAME: MKT-M20BREV3
SCALE: 2:1
Figure 3. 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide
Package drawings are provided as a service to customers considering Fairchild components. Drawings may change in any manner
without notice. Please note the revision and/or date on the drawing and contact a Fairchild Semiconductor representative to verify or
obtain the most recent revision. Package specifications do not expand the terms of Fairchild’s worldwide terms and conditions,
specifically the warranty therein, which covers Fairchild products.
Always visit Fairchild Semiconductor’s online packaging area for the most recent package drawings:
http://www.fairchildsemi.com/packaging/
©1994 Fairchild Semiconductor Corporation
74LCX240 Rev. 1.6.0
www.fairchildsemi.com
8
74LCX240 — Low Voltage Octal Buffer/Line Driver with 5V Tolerant Inputs and Outputs
Physical Dimensions
74LCX240 — Low Voltage Octal Buffer/Line Driver with 5V Tolerant Inputs and Outputs
Physical Dimensions (Continued)
Figure 4. 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
Package drawings are provided as a service to customers considering Fairchild components. Drawings may change in any manner
without notice. Please note the revision and/or date on the drawing and contact a Fairchild Semiconductor representative to verify or
obtain the most recent revision. Package specifications do not expand the terms of Fairchild’s worldwide terms and conditions,
specifically the warranty therein, which covers Fairchild products.
Always visit Fairchild Semiconductor’s online packaging area for the most recent package drawings:
http://www.fairchildsemi.com/packaging/
©1994 Fairchild Semiconductor Corporation
74LCX240 Rev. 1.6.0
www.fairchildsemi.com
9
74LCX240 — Low Voltage Octal Buffer/Line Driver with 5V Tolerant Inputs and Outputs
Physical Dimensions (Continued)
Figure 5. 20-Lead Shrink Small Outline Package (SSOP), JEDEC MO-150, 5.3mm Wide
Package drawings are provided as a service to customers considering Fairchild components. Drawings may change in any manner
without notice. Please note the revision and/or date on the drawing and contact a Fairchild Semiconductor representative to verify or
obtain the most recent revision. Package specifications do not expand the terms of Fairchild’s worldwide terms and conditions,
specifically the warranty therein, which covers Fairchild products.
Always visit Fairchild Semiconductor’s online packaging area for the most recent package drawings:
http://www.fairchildsemi.com/packaging/
©1994 Fairchild Semiconductor Corporation
74LCX240 Rev. 1.6.0
www.fairchildsemi.com
10
74LCX240 — Low Voltage Octal Buffer/Line Driver with 5V Tolerant Inputs and Outputs
Physical Dimensions (Continued)
Figure 6. 20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
Package drawings are provided as a service to customers considering Fairchild components. Drawings may change in any manner
without notice. Please note the revision and/or date on the drawing and contact a Fairchild Semiconductor representative to verify or
obtain the most recent revision. Package specifications do not expand the terms of Fairchild’s worldwide terms and conditions,
specifically the warranty therein, which covers Fairchild products.
Always visit Fairchild Semiconductor’s online packaging area for the most recent package drawings:
http://www.fairchildsemi.com/packaging/
©1994 Fairchild Semiconductor Corporation
74LCX240 Rev. 1.6.0
www.fairchildsemi.com
11
ACEx®
Build it Now™
CorePLUS™
CROSSVOLT™
CTL™
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EcoSPARK®
EZSWITCH™ *
™
PDP-SPM™
Power220®
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Power-SPM™
PowerTrench®
Programmable Active Droop™
QFET®
QS™
QT Optoelectronics™
Quiet Series™
RapidConfigure™
SMART START™
SPM®
STEALTH™
SuperFET™
SuperSOT™-3
SuperSOT™-6
SuperSOT™-8
FPS™
FRFET®
Global Power ResourceSM
Green FPS™
Green FPS™e-Series™
GTO™
i-Lo™
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MICROCOUPLER™
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Motion-SPM™
OPTOLOGIC®
OPTOPLANAR®
®
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* EZSWITCH™ and FlashWriter® are trademarks of System General Corporation, used under license by Fairchild Semiconductor.
DISCLAIMER
FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS
HEREIN TO IMPROVE RELIABILITY, FUNCTION, OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE
APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS
PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. THESE SPECIFICATIONS DO NOT EXPAND THE TERMS OF FAIRCHILD’S
WORLDWIDE TERMS AND CONDITIONS, SPECIFICALLY THE WARRANTY THEREIN, WHICH COVERS THESE PRODUCTS.
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 FAIRCHILD SEMICONDUCTOR CORPORATION.
As used herein:
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 of the user.
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.
PRODUCT STATUS DEFINITIONS
Definition of Terms
Datasheet Identification
Product Status
Definition
Advance Information
Formative or In Design
This datasheet contains the design specifications for product
development. Specifications may change in any manner without notice.
Preliminary
First Production
This datasheet contains preliminary data; supplementary data will be
published at a later date. Fairchild Semiconductor reserves the right to
make changes at any time without notice to improve design.
No Identification Needed
Full Production
This datasheet contains final specifications. Fairchild Semiconductor
reserves the right to make changes at any time without notice to improve
the design.
Obsolete
Not In Production
This datasheet contains specifications on a product that has been
discontinued by Fairchild Semiconductor. The datasheet is printed for
reference information only.
Rev. I33
©1994 Fairchild Semiconductor Corporation
74LCX240 Rev. 1.6.0
www.fairchildsemi.com
12
74LCX240 — Low Voltage Octal Buffer/Line Driver with 5V Tolerant Inputs and Outputs
TRADEMARKS
The following includes registered and unregistered trademarks and service marks, owned by Fairchild Semiconductor and/or its global
subsidiaries, and is not intended to be an exhaustive list of all such trademarks.
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ON Semiconductor makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does ON Semiconductor assume any liability
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Buyer is responsible for its products and applications using ON Semiconductor products, including compliance with all laws, regulations and safety requirements or standards,
regardless of any support or applications information provided by ON Semiconductor. “Typical” parameters which may be provided in ON Semiconductor data sheets and/or
specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer
application by customer’s technical experts. ON Semiconductor does not convey any license under its patent rights nor the rights of others. ON Semiconductor products are not
designed, intended, or authorized for use as a critical component in life support systems or any FDA Class 3 medical devices or medical devices with a same or similar classification
in a foreign jurisdiction or any devices intended for implantation in the human body. Should Buyer purchase or use ON Semiconductor products for any such unintended or unauthorized
application, Buyer shall indemnify and hold ON Semiconductor and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and
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