TC74LCX541F/FK
TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic
TC74LCX541F, TC74LCX541FK
Low-Voltage Octal Bus Buffer with 5-V Tolerant Inputs and Outputs
The TC74LCX541 is a high-performance CMOS octal bus buffer.
Designed for use in 3.3-V systems, it achieves high-speed operation
while maintaining the CMOS low power dissipation.
The device is designed for low-voltage (3.3 V) VCC applications, but it
could be used to interface to 5 V supply environment for both inputs and
outputs.
The TC74LCX541 is a non-inverting 3-state buffer having two activelow output enables. When either OE1 or OE2 are high, the terminal
outputs are in the high-impedance state. This device is designed to be
used with 3-state memory address drivers, etc.
All inputs are equipped with protection circuits against static
discharge.
TC74LCX541F
TC74LCX541FK
Features
•
•
•
Low-voltage operation: VCC = 1.65 to 3.6 V
High-speed operation: tpd = 6.5 ns (max) (VCC = 3.0 to 3.6 V)
Output current: |IOH|/IOL = 24 mA (min) (VCC = 3.0 V)
•
Latch-up performance: ≥ ±500 mA
•
Available in JEITA SOP, VSSOP (US)
•
Power-down protection provided on all inputs and outputs
•
Pin and function compatible with the 74 series
Weight:
SOP20-P-300-1.27A
VSSOP20-P-0030-0.50
: 0.22 g ( typ.)
: 0.03 g ( typ.)
(74AC/VHC/HC/F/ALS/LS etc.) 541 type
Note: The Electrical Characteristics of VCC = 1.8 ± 0.15 V is only applicable for products which manufactured
from January 2009 onward.
Start of commercial production
1995-02
© 2018
Toshiba Electronic Devices & Storage Corporation
1
2018-08-02
TC74LCX541F/FK
Pin Assignment (top view)
IEC Logic Symbol
1
20
A1
2
19
A2
3
18
Y1
A3
4
17
Y2
A4
5
16
Y3
A5
6
15
Y4
A6
7
14
Y5
A7
8
13
Y6
A8
9
12
Y7
GND 10
11
Y8
(1)
(19)
VCC
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
OE1
OE2
An
H
X
X
Z
X
H
X
Z
L
L
H
H
L
L
L
L
X: Don’t care
Z: High impedance
© 2018
Toshiba Electronic Devices & Storage Corporation
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2018-08-02
TC74LCX541F/FK
Absolute Maximum Ratings (Note 1)
Characteristics
Symbol
Rating
Unit
Power supply voltage
VCC
−0.5 to 7.0
V
DC input voltage
VIN
−0.5 to 7.0
V
−0.5 to 7.0 (Note 2)
−0.5 to VCC + 0.5
(Note 3)
V
DC output voltage
VOUT
Input diode current
IIK
−50
Output diode current
IOK
±50
DC output current
IOUT
±50
mA
Power dissipation
PD
180
mW
ICC/IGND
±100
mA
Tstg
−65 to 150
°C
DC VCC/ground current
Storage temperature
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
1.65 to 3.6
Power supply voltage
VCC
Input voltage
VIN
V
1.5 to 3.6 (Note 2)
0 to 5.5
V
0 to 5.5 (Note 3)
Output voltage
Output current
VOUT
IOH/IOL
Operating temperature
Topr
Input rise and fall time
dt/dv
V
0 to VCC (Note 4)
±24
(Note 5)
±12
(Note 6)
mA
−40 to 85
0 to 10 (Note 7)
°C
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: Data retention only
Note 3: Output in OFF state
Note 4: High or low state
Note 5: VCC = 3.0 to 3.6 V
Note 6: VCC = 2.7 to 3.0 V
Note 7: VIN = 0.8 to 2.0 V, VCC = 3.0 V
© 2018
Toshiba Electronic Devices & Storage Corporation
3
2018-08-02
TC74LCX541F/FK
Electrical Characteristics
DC Characteristics (Ta = −40 to 85°C)
Characteristics
Symbol
Min
Max
1.65 to 2.3
VCC×0.9
2.3 to 2.7
1.7
2.7 to 3.6
2.0
1.65 to 2.3
VCC×0.1
2.3 to 2.7
0.7
2.7 to 3.6
0.8
1.65 to 3.6
VCC−0.2
IOH = −4 mA
1.65
1.05
IOH = −8 mA
2.3
1.7
IOH = −12 mA
2.7
2.2
IOH = −18 mA
3.0
2.4
IOH = −24 mA
3.0
2.2
IOL = 100 µA
1.65 to 3.6
0.2
IOL = 4 mA
1.65
0.45
IOL = 8 mA
2.3
0.7
IOL = 12 mA
2.7
0.4
IOL = 16 mA
3.0
0.4
IOL = 24 mA
3.0
0.55
Test Condition
Unit
VCC (V)
H-level
VIH
Input voltage
L-level
VIL
IOH = −100 µA
H-level
VOH
VIN = VIH or VIL
Output voltage
L-level
VOL
VIN = VIH or VIL
V
V
Input leakage current
IIN
VIN = 0 to 5.5 V
1.65 to 3.6
±5.0
µA
3-state output off-state current
IOZ
VIN = VIH or VIL
VOUT = 0 to 5.5 V
1.65 to 3.6
±5.0
µA
Power off leakage current
IOFF
VIN/VOUT = 5.5 V
0
10.0
µA
VIN = VCC or GND
1.65 to 3.6
10.0
Quiescent supply current
ICC
VIN/VOUT = 3.6 to 5.5 V
1.65 to 3.6
±10.0
VIH = VCC − 0.6 V (per 1 input)
2.7 to 3.6
500
Increase in ICC per input
∆ICC
© 2018
Toshiba Electronic Devices & Storage Corporation
4
µA
2018-08-02
TC74LCX541F/FK
AC Characteristics (Ta = −40 to 85°C)
Characteristics
Symbol
Test Condition
Min
Max
1.8 ± 0.15
25.0
2.5 ± 0.2
8.5
2.7
7.5
3.3 ± 0.3
1.5
6.5
1.8 ± 0.15
34.0
2.5 ± 0.2
17.0
2.7
9.5
3.3 ± 0.3
1.5
8.5
1.8 ± 0.15
32.0
2.5 ± 0.2
16.0
2.7
8.5
3.3 ± 0.3
1.5
7.5
2.7
3.3 ± 0.3
1.0
Unit
VCC (V)
Propagation delay time
Output enable time
Output disable time
Output to output skew
Note:
tpLH
tpHL
tpZL
tpZH
tpLZ
tpHZ
Figure 1, Figure 2
Figure 1, Figure 3
Figure 1, Figure 3
tosLH
tosHL
(Note)
ns
ns
ns
ns
Parameter guaranteed by design.
(tosLH = |tpLHm − tpLHn|, tosHL = |tpHLm − tpHLn|)
Dynamic Switching Characteristics (Ta = 25°C, input: tr = tf = 2.5 ns, CL = 50 pF, RL = 500 Ω)
Characteristics
Symbol
Test Condition
Typ.
Unit
VCC (V)
Quiet output maximum dynamic VOL
VOLP
VIH = 3.3 V, VIL = 0 V
3.3
0.8
V
Quiet output minimum dynamic VOL
|VOLV|
VIH = 3.3 V, VIL = 0 V
3.3
0.8
V
Typ.
Unit
Capacitive Characteristics (Ta = 25°C)
Characteristics
Symbol
Test Condition
VCC (V)
Input capacitance
Output capacitance
Power dissipation capacitance
Note:
CIN
3.3
7
pF
COUT
3.3
8
pF
3.3
40
pF
CPD
fIN = 10 MHz
(Note)
CPD is defined as the value of the internal equivalent capacitance which is calculated from the operating current
consumption.
Average operating current can be obtained by the equation:
ICC (opr) = CPD · VCC · fIN + ICC/8 (per bit)
© 2018
Toshiba Electronic Devices & Storage Corporation
5
2018-08-02
TC74LCX541F/FK
AC Test Circuit
RL
Switch
Measure
Parameter
Switch
tpLH, tpHL
Open
tpLZ, tpZL
RL
CL
Output
Open
6.0 V or VCC×2
GND
tpHZ, tpZH
6.0 V
@ VCC =3.3±0.3V
@ VCC =2.7V
VCC×2
@ VCC =2.5±0.2V
@ VCC =1.8±0.15V
GND
Figure 1
© 2018
Toshiba Electronic Devices & Storage Corporation
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2018-08-02
TC74LCX541F/FK
AC Waveform
tr 2.5 ns
tf 2.5 ns
VIH
90%
VIM
Input
(A)
10%
GND
VOH
Output
(Y)
VOM
tpLH
VOL
tpHL
Figure 2
tpLH, tpHL
tr
tf
VIH
90%
VIM
Output Enable
(
)
10%
tpLZ
GND
tpZL
VOH
Output (Y)
Low to Off to Low
VOM
VX
tpHZ
VOL
tpZH
VOH
VY
Output (Y)
High to Off to High
VOM
GND
Outputs
enabled
Figure 3
Outputs
disabled
Outputs
enabled
tpLZ, tpHZ, tpZL, tpZH
VCC
Symbol
3.3 ± 0.3 V
2.7 V
Input
Output
Load
2.5 ± 0.2 V
1.8 ± 0.15 V
VIH
2.7 V
VCC
VCC
VIM
1.5 V
VCC/2
VCC/2
tr,tf
2.5 ns
2.0 ns
2.0 ns
VOM
1.5 V
VOH/2
VOH/2
VX
VOL +0.3 V
VOL +0.15 V
VOL +0.15 V
VY
VOH -0.3 V
VOH -0.15 V
VOH -0.15 V
CL
50 pF
30 pF
30 pF
RL
500 Ω
500 Ω
1 kΩ
© 2018
Toshiba Electronic Devices & Storage Corporation
7
2018-08-02
TC74LCX541F/FK
Package Dimensions
Weight: 0.22 g (typ.)
© 2018
Toshiba Electronic Devices & Storage Corporation
8
2018-08-02
TC74LCX541F/FK
Package Dimensions
Weight: 0.03 g (typ.)
© 2018
Toshiba Electronic Devices & Storage Corporation
9
2018-08-02
TC74LCX541F/FK
RESTRICTIONS ON PRODUCT USE
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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
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applicability of any information contained in this document, or in charts, diagrams, programs, algorithms, sample application circuits, or any
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2018-08-02