TC74VHCT540,541AF/AFK
TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic
TC74VHCT540AF, TC74VHCT540AFK
TC74VHCT541AF, TC74VHCT541AFK
Octal Bus Buffer
TC74VHCT540AF/AFK
Inverted, 3-State Outputs
TC74VHCT541AF/AFK
Non-Inverted, 3-State Outputs
The TC74VHCT540A and 541A are advanced high speed CMOS OCTAL
BUS BUFFERs fabricated with silicon gate C2MOS technology. They achieve
the high speed operation similar to equivalent Bipolar Schottky TTL while
maintaining the CMOS low power dissipation.
The TC74VHCT540A is an inverting type and, the TC74VHCT541A is a
non-inverting type.
When either G1 or G2 are high, the terminal outputs are in the highimpedance state.
The input voltage are compatible with TTL output voltage.
These devices may be used as a level converter for interfacing 3.3 V to 5
V system.
Input protection and output circuit ensure that 0 to 5.5 V can be applied to
the input and output (Note) pins without regard to the supply voltage. These
structure prevents device destruction due to mismatched supply and
input/output voltages such as battery back up, hot board insertion, etc.
Note:
Output in off-state
TC74VHCT540AF, TC74VHCT541AF
TC74VHCT540AFK, TC74VHCT541AFK
Weight
SOP20-P-300-1.27A:
0.22 g (typ.)
VSSOP20-P-0030-0.50: 0.03 g (typ.)
Features
High speed: tpd = 5.4 ns (typ.) at VCC = 5 V
Low power dissipation: ICC = 4 A (max) at Ta = 25°C
Compatible with TTL inputs:
VIL = 0.8 V (max)
VIH = 2.0 V (min)
Power down protection is provided on all inputs and outputs
Balanced propagation delays: tpLH tpHL
Low noise: VOLP = 1.5 V (max)
Pin and function compatible with the 74 series (74AC/HC/F/ALS/LS etc.) 540/541 type.
Start of commercial production
1995-09
© 2019
Toshiba Electronic Devices & Storage Corporation
1
2019-01-31
TC74VHCT540,541AF/AFK
Pin Assignment
TC74VHCT540A
TC74VHCT541A
1
20
A1
2
A2
3
19
8
18
A3
4
A4
VCC
1
20
A1
2
19
A2
3
18
Y1
17
A3
4
17
Y2
5
16
A4
5
16
Y3
A5
6
15
A5
6
15
Y4
A6
7
14
A6
7
14
Y5
A7
8
13
A7
8
13
Y6
A8
9
12
A8
9
12
Y7
GND 10
11
GND 10
11
Y8
(top view)
VCC
(top view)
IEC Logic Symbol
TC74VHCT540A
(1)
(19)
A1
A2
A3
A4
A5
A6
A7
A8
&
TC74VHCT541A
(1)
(19)
EN
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
(18)
(17)
(16)
(15)
(14)
(13)
(12)
(11)
A1
A2
A3
A4
A5
A6
A7
A8
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
&
EN
(18)
(17)
(16)
(15)
(14)
(13)
(12)
(11)
Y1
Y2
Y3
Y4
Y5
Y6
Y7
Y8
Truth Table
Inputs
Outputs
G2
An
Yn
Yn
H
X
X
Z
Z
X
H
X
Z
Z
L
L
H
H
L
L
L
L
L
H
G1
X: Don’t care
Z: High impedance
Yn: VHCT541A
Y n : VHCT540A
© 2019
Toshiba Electronic Devices & Storage Corporation
2
2019-01-31
TC74VHCT540,541AF/AFK
Absolute Maximum Ratings (Note 1)
Characteristics
Symbol
Rating
Unit
Supply voltage range
VCC
0.5 to 7.0
V
DC input voltage
VIN
0.5 to 7.0
V
DC output voltage
VOUT
0.5 to 7.0
(Note 2)
0.5 to VCC 0.5
(Note 3)
V
Input diode current
IIK
20
Output diode current
IOK
20
DC output current
IOUT
25
mA
DC VCC/ground current
ICC
75
mA
Power dissipation
PD
180
mW
Storage temperature
Tstg
65 to 150
°C
mA
(Note 4)
mA
Note 1: Exceeding any of the absolute maximum ratings, even briefly, lead to deterioration in IC performance or even
destruction.
Using continuously under heavy loads (e.g. the application of high temperature/current/voltage and the significant
change in temperature, etc.) may cause this product to decrease in the reliability significantly even if the operating
conditions (i.e. operating temperature/current/voltage, etc.) are within the absolute maximum ratings and the
operating ranges.
Please design the appropriate reliability upon reviewing the Toshiba Semiconductor Reliability Handbook
(“Handling Precautions”/“Derating Concept and Methods”) and individual reliability data (i.e. reliability test report
and estimated failure rate, etc).
Note 2: Output in off-state
Note 3: High or low state. IOUT absolute maximum rating must be observed.
Note 4: VOUT GND, VOUT VCC
Operating Ranges (Note 1)
Characteristics
Symbol
Rating
Unit
Supply voltage
VCC
4.5 to 5.5
V
Input voltage
VIN
Output voltage
0 to 5.5
VOUT
V
0 to 5.5
(Note 2)
0 to VCC
(Note 3)
V
Operating temperature
Topr
40 to 85
°C
Input rise and fall time
dt/dv
0 to 20
ns/V
Note 1: The operating ranges must be maintained to ensure the normal operation of the device.
Unused inputs must be tied to either VCC or GND.
Note 2: Output in off-state
Note 3: High or low state
© 2019
Toshiba Electronic Devices & Storage Corporation
3
2019-01-31
TC74VHCT540,541AF/AFK
Electrical Characteristics
DC Characteristics
Test Condition
Characteristics
Ta =
−40 to 85°C
Ta = 25°C
Symbol
VCC (V)
Min
Typ.
Max
Min
Max
Unit
High-level input
voltage
VIH
―
4.5 to 5.5
2.0
―
―
2.0
―
V
Low-level input
voltage
VIL
―
4.5 to 5.5
―
―
0.8
―
0.8
V
High-level output
voltage
IOH = −50 μA
VIN
= VIH or VIL I
OH = −8 mA
4.5
4.40
4.50
―
4.40
―
VOH
4.5
3.94
―
―
3.80
―
Low-level output
voltage
IOL = 50 μA
VIN
= VIH or VIL I = 8 mA
OL
4.5
―
0.0
0.10
―
0.10
VOL
4.5
―
―
0.36
―
0.44
3-state output offstate current
IOZ
VIN = VIH or VIL
VOUT = VCC or GND
5.5
―
―
±0.25
―
±2.50
μA
Input leakage current
IIN
VIN = 5.5 V or GND
0 to 5.5
―
―
±0.1
―
±1.0
μA
ICC
VIN = VCC or GND
5.5
―
―
4.0
―
40.0
μA
ICCT
Per input: VIN = 3.4 V
Other input: VCC or GND
5.5
―
―
1.35
―
1.50
mA
IOPD
VOUT = 5.5 V
0
―
―
+0.5
―
+5.0
μA
Ta =
−40 to 85°C
Unit
Quiescent supply
current
Output leakage
current (Power-OFF)
V
V
AC Characteristics (input: tr tf 3 ns)
Test Condition
Characteristics
Ta = 25°C
Symbol
VCC (V)
CL (pF)
Min
Typ.
Max
Min
Max
15
―
5.4
7.4
1.0
8.5
50
―
5.9
8.4
1.0
9.5
15
―
5.0
6.9
1.0
8.0
50
―
5.5
7.9
1.0
9.0
15
―
8.3
11.3
1.0
13.0
50
―
8.8
12.3
1.0
14.0
Propagation delay
time
(TC74VHCT540A)
tpLH
tpHL
―
Propagation delay
time
(TC74VHCT541A)
tpLH
tpHL
―
3-state output enable
time
tpZL
tpZH
RL = 1 k
5.0 ± 0.5
3-state output disable
time
tpLZ
tpHZ
RL = 1 k
5.0 ± 0.5
50
―
9.4
11.9
1.0
13.5
ns
Output to output skew
tosLH
tosHL
5.0 ± 0.5
50
―
―
1.0
―
1.0
ns
Input capacitance
Output capacitance
Power dissipation
capacitance
(Note 1)
5.0 ± 0.5
ns
5.0 ± 0.5
ns
ns
CIN
―
―
4
10
―
10
pF
COUT
―
―
9
―
―
―
pF
―
19
―
―
―
pF
CPD
(Note 2)
Note 1: Parameter guaranteed by design.
tosLH = |tpLHm − tpLHn|, tosHL = |tpHLm − tpHLn|
Note 2: 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)
© 2019
Toshiba Electronic Devices & Storage Corporation
4
2019-01-31
TC74VHCT540,541AF/AFK
Noise Characteristics (input: tr tf 3 ns)
Test Condition
Characteristics
Ta = 25°C
Symbol
Unit
VCC (V)
Typ.
Limit
Quiet output maximum dynamic VOL
VOLP
CL = 50 pF
5.0
1.1
1.5
V
Quiet output minimum dynamic VOL
VOLV
CL = 50 pF
5.0
−1.1
−1.5
V
Minimum high level dynamic input
voltage
VIHD
CL = 50 pF
5.0
―
2.0
V
Maximum low level dynamic input
voltage
VILD
CL = 50 pF
5.0
―
0.8
V
© 2019
Toshiba Electronic Devices & Storage Corporation
5
2019-01-31
TC74VHCT540,541AF/AFK
Package Dimensions
Weight: 0.22 g (typ.)
© 2019
Toshiba Electronic Devices & Storage Corporation
6
2019-01-31
TC74VHCT540,541AF/AFK
Package Dimensions
Weight: 0.03 g (typ.)
© 2019
Toshiba Electronic Devices & Storage Corporation
7
2019-01-31
TC74VHCT540,541AF/AFK
RESTRICTIONS ON PRODUCT USE
Toshiba Corporation and its subsidiaries and affiliates are collectively referred to as “TOSHIBA”.
Hardware, software and systems described in this document are collectively referred to as “Product”.
TOSHIBA reserves the right to make changes to the information in this document and related Product without notice.
This document and any information herein may not be reproduced without prior written permission from TOSHIBA. Even with TOSHIBA's
written permission, reproduction is permissible only if reproduction is without alteration/omission.
Though TOSHIBA works continually to improve Product's quality and reliability, Product can malfunction or fail. Customers are responsible for
complying with safety standards and for providing adequate designs and safeguards for their hardware, software and systems which
minimize risk and avoid situations in which a malfunction or failure of Product could cause loss of human life, bodily injury or damage to
property, including data loss or corruption. Before customers use the Product, create designs including the Product, or incorporate the
Product into their own applications, customers must also refer to and comply with (a) the latest versions of all relevant TOSHIBA information,
including without limitation, this document, the specifications, the data sheets and application notes for Product and the precautions and
conditions set forth in the "TOSHIBA Semiconductor Reliability Handbook" and (b) the instructions for the application with which the Product
will be used with or for. Customers are solely responsible for all aspects of their own product design or applications, including but not limited
to (a) determining the appropriateness of the use of this Product in such design or applications; (b) evaluating and determining the
applicability of any information contained in this document, or in charts, diagrams, programs, algorithms, sample application circuits, or any
other referenced documents; and (c) validating all operating parameters for such designs and applications. TOSHIBA ASSUMES NO
LIABILITY FOR CUSTOMERS' PRODUCT DESIGN OR APPLICATIONS.
PRODUCT IS NEITHER INTENDED NOR WARRANTED FOR USE IN EQUIPMENTS OR SYSTEMS THAT REQUIRE
EXTRAORDINARILY HIGH LEVELS OF QUALITY AND/OR RELIABILITY, AND/OR A MALFUNCTION OR FAILURE OF WHICH MAY
CAUSE LOSS OF HUMAN LIFE, BODILY INJURY, SERIOUS PROPERTY DAMAGE AND/OR SERIOUS PUBLIC IMPACT
("UNINTENDED USE"). Except for specific applications as expressly stated in this document, Unintended Use includes, without limitation,
equipment used in nuclear facilities, equipment used in the aerospace industry, lifesaving and/or life supporting medical equipment,
equipment used for automobiles, trains, ships and other transportation, traffic signaling equipment, equipment used to control combustions or
explosions, safety devices, elevators and escalators, and devices related to power plant. IF YOU USE PRODUCT FOR UNINTENDED USE,
TOSHIBA ASSUMES NO LIABILITY FOR PRODUCT. For details, please contact your TOSHIBA sales representative or contact us via our
website.
Do not disassemble, analyze, reverse-engineer, alter, modify, translate or copy Product, whether in whole or in part.
Product shall not be used for or incorporated into any products or systems whose manufacture, use, or sale is prohibited under any
applicable laws or regulations.
The information contained herein is presented only as guidance for Product use. No responsibility is assumed by TOSHIBA for any
infringement of patents or any other intellectual property rights of third parties that may result from the use of Product. No license to any
intellectual property right is granted by this document, whether express or implied, by estoppel or otherwise.
ABSENT A WRITTEN SIGNED AGREEMENT, EXCEPT AS PROVIDED IN THE RELEVANT TERMS AND CONDITIONS OF SALE FOR
PRODUCT, AND TO THE MAXIMUM EXTENT ALLOWABLE BY LAW, TOSHIBA (1) ASSUMES NO LIABILITY WHATSOEVER,
INCLUDING WITHOUT LIMITATION, INDIRECT, CONSEQUENTIAL, SPECIAL, OR INCIDENTAL DAMAGES OR LOSS, INCLUDING
WITHOUT LIMITATION, LOSS OF PROFITS, LOSS OF OPPORTUNITIES, BUSINESS INTERRUPTION AND LOSS OF DATA, AND (2)
DISCLAIMS ANY AND ALL EXPRESS OR IMPLIED WARRANTIES AND CONDITIONS RELATED TO SALE, USE OF PRODUCT, OR
INFORMATION, INCLUDING WARRANTIES OR CONDITIONS OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE,
ACCURACY OF INFORMATION, OR NONINFRINGEMENT.
Do not use or otherwise make available Product or related software or technology for any military purposes, including without limitation, for
the design, development, use, stockpiling or manufacturing of nuclear, chemical, or biological weapons or missile technology products (mass
destruction weapons). Product and related software and technology may be controlled under the applicable export laws and regulations
including, without limitation, the Japanese Foreign Exchange and Foreign Trade Law and the U.S. Export Administration Regulations. Export
and re-export of Product or related software or technology are strictly prohibited except in compliance with all applicable export laws and
regulations.
Please contact your TOSHIBA sales representative for details as to environmental matters such as the RoHS compatibility of Product. Please
use Product in compliance with all applicable laws and regulations that regulate the inclusion or use of controlled substances, including
without limitation, the EU RoHS Directive. TOSHIBA ASSUMES NO LIABILITY FOR DAMAGES OR LOSSES OCCURRING AS A RESULT
OF NONCOMPLIANCE WITH APPLICABLE LAWS AND REGULATIONS.
https://toshiba.semicon-storage.com/
© 2019
Toshiba Electronic Devices & Storage Corporation
8
2019-01-31