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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
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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.
Revised April 2005
74VHCT541A
Octal Buffer/Line Driver with 3-STATE Outputs
General Description
The VHCT541A is an advanced high-speed CMOS device
fabricated with silicon gate CMOS technology. It achieves
the high-speed operation similar to equivalent Bipolar
Schottky TTL while maintaining the CMOS low power dissipation.
The VHCT541A is an octal buffer/line driver designed to be
employed as memory and address drivers, clock drivers
and bus oriented transmitter/receivers.
This device is similar in function to the VHCT244A while
providing flow-through architecture (inputs on opposite side
from outputs). This pinout arrangement makes this device
especially useful as an output port for microprocessors,
allowing ease of layout and greater PC board density.
Protection circuits ensure that 0V to 7V can be applied to
the input and output (Note 1) pins without regard to the
supply voltage. This device can be used to interface 3V to
5V systems and two supply systems such as battery
backup. This circuit prevents device destruction due to mismatched supply and input voltages.
Note 1: Outputs in OFF-state.
Features
■ High Speed: tPD
5.5 ns (typ) at VCC
■ Low power dissipation: ICC
5V
4 PA (max) at TA
25qC
■ Power down protection is provided on all inputs and
outputs
■ Pin and function compatible with 74HCT541
Ordering Code:
Order Number
Package Number
74VHCT541AM
74VHCT541ASJ
74VHCT541AMTC
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide
M20D
Pb-Free 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
MTC20
74VHCT541AN
Package Description
M20B
N20A
20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300" Wide
Surface mount packages are also available on Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Pb-Free package per JEDEC J-STD-020B.
Logic Symbol
Connection Diagram
IEEE/IEC
Truth Table
Inputs
Pin Descriptions
OE1
Outputs
OE2
I
Pin Names
Description
L
L
H
OE1, OE2
3-STATE Output Enable Inputs
H
X
X
Z
I0 - I7
Inputs
X
H
X
Z
O0 - O7
3-STATE Outputs
L
L
L
L
H
X
© 2005 Fairchild Semiconductor Corporation
DS500013
HIGH Voltage Level
Immaterial
H
L LOW Voltage Level
Z High Impedance
www.fairchildsemi.com
74VHCT541A Octal Buffer/Line Driver with 3-STATE Outputs
June 1997
74VHCT541A
Absolute Maximum Ratings(Note 2)
Recommended Operating
Conditions (Note 6)
0.5V to 7.0V
0.5V to 7.0V
Supply Voltage (VCC)
DC Input Voltage (VIN)
0V to 5.5V
Input Voltage (VIN)
(Note 3)
0.5V to 7.0V
(Note 4)
0.5V to V CC + 0.5V
20 mA
Input Diode Current (IIK)
4.5V to 5.5V
Supply Voltage (VCC)
DC Output Voltage (VOUT)
Output Voltage (VOUT)
Output Diode Current (IOK)
(Note 4)
0V to VCC
(Note 3)
0V to 5.5V
40qC to 85qC
Operating Temperature (TOPR)
r20 mA
r25 mA
r75 mA
65qC to 150qC
(Note 5)
DC Output Current (IOUT)
DC VCC/GND Current (ICC)
Storage Temperature (TSTG)
Input Rise and Fall Time (tr, tf)
VCC
Lead Temperature (TL)
260 qC
(Soldering, 10 seconds)
5.0V r0.5V
0 a 20 ns/V
Note 2: Absolute Maximum Ratings are values beyond which the device
may be damaged or have its useful life impaired. The databook specifications should be met, without exception, to ensure that the system design is
reliable over its power supply, temperature, and output/input loading variables. Fairchild does not recommend operation outside databook specifications.
Note 3: When Outputs are in OFF-State OR when VCC
0V.
Note 4: HIGH or LOW state IOUT absolute maximum rating must be
observed.
Note 5: VOUT GND,.VOUT ! VCC (Outputs Active).
Note 6: Unused inputs must be held HIGH or LOW. They may not float.
DC Electrical Characteristics
Symbol
Parameter
Min
2.0
VIH
HIGH Level Input Voltage
4.5 5.5
VIL
LOW Level Input Voltage
4.5 5.5
V OH
HIGH Level Output Voltage
V OL
LOW Level Output Voltage
IOZ
3-STATE Output
TA
VCC
(V)
TA
Max
40qC to 85qC
Min
4.4
4.5
3.94
Max
2.0
0.8
4.5
4.5
25qC
Typ
4.5
0.0
0.1
Units
V
0.8
V
4.4
V
3.80
V
0.1
V
Input Leakage Current
VIN
VIH
IOH
8 mA
IOL
50 PA
IOL
8 mA
VIN
VIL
VIN
VIH or VIL
0.36
0.44
V
5.5
r0.25
r2.5
PA
0 5.5
r0.1
r1.0
PA
VIN
5.5V or GND
VCC or GND
VOUT
VCC or GND
ICC
Quiescent Supply Current
5.5
4.0
40.0
PA
VIN
ICCT
Maximum ICC/Input
5.5
1.35
1.50
mA
VIN 3.4V
Other Inputs
IOFF
Output Leakage Current
0
0.5
5.0
PA
VOUT
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50 PA
IOH
4.5
Off-State Current
IIN
Conditions
2
5.5V
VCC or GND
74VHCT541A
Noise Characteristics
Symbol
Parameter
TA
25qC
VCC
(V)
Typ
Limits
Units
Conditions
VOLP
(Note 7)
Quiet Output Maximum Dynamic VOL
5.0
1.2
1.6
V
CL
50 pF
VOLV
(Note 7)
Quiet Output Minimum Dynamic VOL
5.0
1.2
1.6
V
CL
50 pF
VIHD
(Note 7)
Minimum HIGH Level Dynamic Input Voltage
5.0
2.0
V
CL
50 pF
VILD
(Note 7)
Maximum HIGH Level Dynamic Input Voltage
5.0
0.8
V
CL
50 pF
Note 7: Parameter guaranteed by design.
AC Electrical Characteristics
Symbol
Parameter
tPLH
Propagation Delay
tPHL
Time
tPZL
3-STATE Output
tPZH
Enable Time
tPLZ
3-STATE Output
tPHZ
Disable Time
tOSLH
Output to Output Skew
VCC
(V)
TA
Min
5.0 r 0.5
5.0 r 0.5
5.0 r 0.5
25qC
Typ
TA
Max
40qC to 85qC
Min
Max
Units
5.0
6.9
1.0
8.0
5.5
7.9
1.0
9.0
8.3
11.3
1.0
13.0
8.8
12.3
1.0
14.0
9.4
11.9
1.0
13.5
ns
1.0
1.0
ns
10
10
5.0 r 0.5
Conditions
ns
ns
RL
RL
CL
15 pF
CL
50 pF
1 k: CL
15 pF
CL
50 pF
1 k: CL
50 pF
(Note 8)
CL
50 pF
tOSHL
CIN
Input Capacitance
4
pF
VCC
Open
COUT
Output Capacitance
9
pF
VCC
5.0V
CPD
Power Dissipation Capacitance
19
pF
(Note 9)
Note 8: Parameter guaranteed by design. tOSLH
|tPLHmax t PLHmin|; tOSHL
|tPHLmax tPHLmin|.
Note 9: CPD is defined as the value of the internal equivalent capacitance which is calculated from the operating current consumption without load. Average
operating current can be obtained by the equation: ICC (OPR.) CPD * VCC * fIN ICC/8 (per bit).
3
www.fairchildsemi.com
74VHCT541A
Physical Dimensions inches (millimeters) unless otherwise noted
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide
Package Number M20B
www.fairchildsemi.com
4
74VHCT541A
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
Pb-Free 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
Package Number M20D
5
www.fairchildsemi.com
74VHCT541A
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
Package Number MTC20
www.fairchildsemi.com
6
74VHCT541A Octal Buffer/Line Driver with 3-STATE Outputs
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300" Wide
Package Number N20A
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.
www.fairchildsemi.com
7
www.fairchildsemi.com
ON Semiconductor and
are trademarks of Semiconductor Components Industries, LLC dba ON Semiconductor or its subsidiaries in the United States and/or other countries.
ON Semiconductor owns the rights to a number 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 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
expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such
claim alleges that ON Semiconductor was negligent regarding the design or manufacture of the part. ON Semiconductor is an Equal Opportunity/Affirmative Action Employer. This
literature is subject to all applicable copyright laws and is not for resale in any manner.
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