Document
UNISONIC TECHNOLOGIES CO., LTD
U74HC540
OCTAL BUFFERS AND LINE DRIVERS WITH 3-STATE OUTPUTS
DESCRIPTION
The U74HC540 combines with octal buffers and line drivers with inverting 3-state outputs. The 3-state output is controlled by output enable inputs OE1 and OE2 , all eight outputs will be in high-impedance when either of the 2 inputs is applied with high voltage.
FEATURES
* Operation voltage range: 2V ~ 6V * High-current 3-state outputs for bus driver * Inverting outputs
ORDERING INFORMATION
Ordering Number
Lead Free
Halogen Free
U74HC540L-D20-T
U74HC540G-D20-T
U74HC540L-S20-R
U74HC540G-S20-R
U74HC540L-P20-R
U74HC540G-P20-R
Package
DIP-20 SOP-20 TSSOP-20
CMOS IC
Packing Tube
Tape Reel Tape Reel
MARKING
www.unisonic.com.tw Copyright © 2023 Unisonic Technologies Co., Ltd
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QW-R126-004.E
U74HC540
PIN CONFIGURATION
CMOS IC
FUNCTION TABLE (each gate)
INPUT
OE1
OE 2
A
L
L
L
L
L
H
H
X
X
X
H
X
LOGIC DIAGRAM (positive logic)
OUTPUT
Y
H L Z Z
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www.unisonic.com.tw
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QW-R126-004.E
U74HC540
CMOS IC
ABSOLUTE MAXIMUM RATINGS (unless otherwise specified)(Note 1)
PARAMETER
SYMBOL
RATINGS
UNIT
Supply Voltage
VCC
-0.5~7
V
Input Clamp Current
IIK
±20
mA
Output Clamp Current
IOK
±20
mA
Output Current
IOUT
±35
mA
VCC or GND Current
ICC
±70
mA
Storage Temperature
TSTG
-65 ~ +150
°C
Note 1. The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
2. Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.
RECOMMENDED OPERATING CONDITIONS
PARAMETER Supply Voltage Input Voltage Output Voltage
SYMBOL VCC VIN VOUT
Input Transition Rise or Fall Rate
tR, tF
Operating Temperature
TA
ELECTRICAL CHARACTERISTICS
CONDITIONS
VCC=2V VCC=4.5V VCC=6V
MIN TYP MAX UNIT
2
5
6
V
0
VCC
V
0
VCC
V
0
1000 ns
0
500 ns
0
400
ns
-40
+125 °C
PARAMETER High-Level Input Voltage Low-Level Input Voltage
High-Level Output Voltage
Low-Level Output Voltage Input Leakage Current Output Leakage Current Quiescent Supply Current
Propagation delay from input (A) to output(Y)
SYMBOL
TEST CONDITIONS
VIH VIL
VOH
VOL II(LEAK) IO(LEAK)
IQ
tPLH/ tPHL
VCC=2V VCC=4.5V VCC=6V VCC=2V VCC=4.5V VCC=6V VCC=2V, IOH=-20μA VCC=4.5V, IOH=-20μA VCC=6V, IOH=-20μA VCC=4.5V, IOH=-6mA VCC=6V, IOH=-7.8mA VCC=2V, IOL=20μA VCC=4.5V, IOL=20μA VCC=6V, IOL=20μA VCC=4.5V, IOL =6mA VCC=6V, IOL =7.8mA VCC=6V, VIN=VCC or GND VCC=6V, VOUT=VCC or GND VCC=6V,VIN=VCC or GND, IOUT=0 VCC=2V, CL=50 pF VCC=2V, CL=150 pF VCC=4.5V, CL=50 pF VCC=4.5V, CL=150 pF VCC=6V, CL=50 pF VCC=6V, CL=150 pF
TA=25°С MIN TYP MAX
TA=-40~+125°С MIN TYP MAX
UNIT
1.5
1.5
V
3.15
3.15
V
4.2
4.2
V
0.5
0.5 V
1.35
1.35 V
1.8
1.8 V
1.9 1.998
1.9
V
4.4 4.499
4.4
V
5.9 5.999
5.9
V
3.98 4.3
3.7
V
5.48 5.8
5.2
V
0.002 0.1
0.1 V
0.001 0.1
0.1 V
0.001 0.1
0.1 V
0.17 0.26
0.4 V
0.15 0.26
0.4 V
±0.1 ±100
±1000 nA
±0.01 ±0.5
±10 uA
8
80 μA
35 100 60 150 10 20 15 30 8 17 13 26
150 ns 188 ns 30 ns 38 ns 26 ns 32 ns
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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U74HC540
CMOS IC
SWITCHING CHARACTERISTICS (tR, tF≤3ns)
PARAMETER
SYMBOL
TEST CONDITIONS
3-state output enable time from OE to Yn
3-state output disable time from OE to Yn
tPZH/ tPZL tPHZ/ tPLZ
VCC=2V, CL=50 pF VCC=2V, CL=150 pF VCC=4.5V, CL=50 pF VCC=4.5V, CL=150 pF VCC=6V, CL=50 pF VCC=6V, CL=150 pF VCC=2V, CL=50 pF VCC=4.5V, CL=50 pF VCC=6V, CL=50 pF
OPERATING CHARACTERISTICS
TA=25°С MIN TYP MAX
TA=-40~+125°С MIN TYP MAX
UNIT
75 150
240 ns
100 200
250 ns
15 30
48 ns
20 40
50 ns
13 26
41 ns
17 34
43 ns
40 150
240 ns
18 30
48 ns
17 26
41 ns
PARAMETER Input Capacitance Power Dissipation Capacitance
SYMBOL
TEST CONDITIONS
CIN
VCC=2V~6V
CPD No load, f=1MHz
MIN TYP MAX UNIT
3
10
pF
35
pF
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www.unisonic.com.tw
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QW-R126-004.E
U74HC540
TEST CIRCUIT AND WAVEFORMS
Note: CL includes probe and jig capacitance.
CMOS IC
UTC assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all UTC products described or contained herein. UTC products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. UTC reserves the right to make changes to information published in this document, including without limitation specifications and product.