HD74HC540, HD74HC541
Octal Buffers/Line Drivers (with 3-state outputs)
REJ03D0628-0200
(Previous ADE-205-508)
Rev.2.00
Mar 30, 2006
Description
The HD74HC540 is an inverting buffer and the HD74HC541 is a non-inverting buffer. The 3-state control gate
operates as a two-input NOR such that if either G
1
or G
2
are high, all eight outputs are in the high-impedance state.
Features
•
High Speed Operation: t
pd
= 11.5 ns typ (C
L
= 50 pF)
•
High Output Current: Fanout of 15 LSTTL Loads
•
Wide Operating Voltage: V
CC
= 2 to 6 V
•
Low Input Current: 1
µA
max
•
Low Quiescent Supply Current: I
CC
(static) = 4
µA
max (Ta = 25°C)
•
Ordering Information
Part Name
HD74HC540P
HD74HC541P
HD74HC540FPEL
HD74HC541FPEL
HD74HC540RPEL
HD74HC541RPEL
HD74HC540TELL
HD74HC541TELL
Package Type
DILP-20 pin
SOP-20 pin (JEITA)
SOP-20 pin (JEDEC)
TSSOP-20 pin
Package Code
(Previous Code)
PRDP0020AC-B
(DP-20NEV)
PRSP0020DD-B
(FP-20DAV)
PRSP0020DC-A
(FP-20DBV)
PTSP0020JB-A
(TTP-20DAV)
Package
Abbreviation
P
FP
RP
T
—
EL (2,000 pcs/reel)
EL (1,000 pcs/reel)
ELL (2,000 pcs/reel)
Taping Abbreviation
(Quantity)
Note: Please consult the sales office for the above package availability.
Function Table
Inputs
G
1
L
L
H
H
L
X
Z
:
:
:
:
G
2
L
L
X
A
L
H
X
X
HD74HC540
H
L
Z
Z
Output Y
HD74HC541
L
H
Z
Z
X
H
high level
low level
irrelevant
off (high-impedance) state of a 3-state output
Rev.2.00 Mar 30, 2006 page 1 of 8
HD74HC540, HD74HC541
Pin Arrangement
HD74HC540
G
1
A
1
A
2
A
3
A
4
A
5
A
6
A
7
A
8
1
20
19
18
17
16
15
14
V
CC
G
2
Y
1
2
3
4
5
6
7
8
9
Y
2
Y
3
Y
4
Y
5
13
12
11
Y
6
Y
7
Y
8
GND 10
(Top view)
HD74HC541
G
1
A
1
A
2
A
3
A
4
A
5
A
6
A
7
A
8
1
20
19
18
17
16
15
14
V
CC
G
2
Y
1
2
3
4
5
6
7
8
9
Y
2
Y
3
Y
4
Y
5
13
12
11
Y
6
Y
7
Y
8
GND 10
(Top view)
Rev.2.00 Mar 30, 2006 page 2 of 8
HD74HC540, HD74HC541
Absolute Maximum Ratings
Item
Supply voltage range
Input / Output voltage
Input / Output diode current
Output current
V
CC
, GND current
Power dissipation
Symbol
V
CC
V
IN
, V
OUT
I
IK
, I
OK
I
O
I
CC
or I
GND
P
T
Ratings
–0.5 to 7.0
–0.5 to V
CC
+0.5
±20
±35
±75
500
Unit
V
V
mA
mA
mA
mW
Storage temperature
Tstg
–65 to +150
°C
Note: The absolute maximum ratings are values, which must not individually be exceeded, and furthermore, no two of
which may be realized at the same time.
Recommended Operating Conditions
Item
Supply voltage
Input / Output voltage
Operating temperature
Input rise / fall time
Note:
*1
Symbol
V
CC
V
IN
, V
OUT
Ta
t
r
, t
f
Ratings
2 to 6
0 to V
CC
–40 to 85
0 to 1000
0 to 500
Unit
V
V
°C
ns
Conditions
V
CC
= 2.0 V
V
CC
= 4.5 V
V
CC
= 6.0 V
0 to 400
1. This item guarantees maximum limit when one input switches.
Waveform: Refer to test circuit of switching characteristics.
Electrical Characteristics
Item
Input voltage
Symbol V
CC
(V)
V
IH
2.0
4.5
6.0
2.0
4.5
6.0
Hysteresis voltage
V
H
2.0
4.5
6.0
2.0
4.5
6.0
4.5
6.0
V
OL
2.0
4.5
6.0
4.5
Off-state output
current
Input current
Quiescent supply
current
I
OZ
Iin
I
CC
6.0
6.0
6.0
6.0
Ta = 25°C
Min
Typ Max
1.5
3.15
4.2
—
—
—
—
—
—
1.9
4.4
5.9
4.18
5.68
—
—
—
—
—
—
—
—
—
—
—
—
—
—
0.1
0.4
0.4
2.0
4.5
6.0
—
—
0.0
0.0
0.0
—
—
—
—
—
—
—
—
0.3
1.35
1.8
—
—
—
—
—
—
—
—
0.1
0.1
0.1
0.26
0.26
±0.5
±0.1
4.0
Ta = –40 to+85°C
Unit
Min
Max
1.5
3.15
4.2
—
—
—
—
—
—
1.9
4.4
5.9
4.13
5.63
—
—
—
—
—
—
—
—
—
—
—
0.3
1.35
1.8
—
—
—
—
—
—
—
—
0.1
0.1
0.1
0.33
0.33
±5.0
±1.0
40
V
I
OH
= –6 mA
I
OH
= –7.8 mA
Vin = V
IH
or V
IL
I
OL
= 20
µA
V
V
Test Conditions
V
IL
V
Output voltage
V
OH
V
Vin = V
IH
or V
IL
I
OH
= –20
µA
I
OL
= 6 mA
I
OL
= 7.8 mA
µA
Vin = V
IH
or V
IL
,
Vout = V
CC
or GND
µA
Vin = V
CC
or GND
µA
Vin = V
CC
or GND, Iout = 0
µA
Rev.2.00 Mar 30, 2006 page 3 of 8
HD74HC540, HD74HC541
Switching Characteristics
(C
L
= 50 pF, Input t
r
= t
f
= 6 ns)
Ta = 25°C
Item
Propagation delay
time
Symbol V
CC
(V)
t
PLH
t
PHL
t
PLH
t
PHL
Output enable
time
Output disable
time
Output rise/fall
time
Input capacitance
t
ZH
t
ZL
t
HZ
t
LZ
t
TLH
t
THL
Cin
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
—
Min
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Typ
—
11
—
—
12
—
—
14
—
—
16
—
—
4
—
5
Max
100
20
17
115
23
20
150
30
26
150
30
26
60
12
10
10
Ta = –40 to +85°C
Min
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Max
125
25
21
145
29
25
190
38
33
190
38
33
75
15
13
10
pF
ns
ns
(HD74HC541 only)
Unit
ns
Test Conditions
(HD74HC540 only)
ns
ns
Test Circuit
V
CC
V
CC
Output
1 k
Ω
Y1 to Y8
A1 to A8
C
L
=
50 pF
TEST
t
PLH
/ t
PHL
t
ZH
/ t
HZ
t
ZL
/ t
LZ
Note : 1. C
L
includes probe and jig capacitance.
S1
OPEN
GND
V
CC
S1
OPEN
GND
V
CC
Input
Pulse Generator
Z
out
= 50
Ω
Rev.2.00 Mar 30, 2006 page 4 of 8
See Function Table
G1, G2
HD74HC540, HD74HC541
Waveforms
HD74HC540
• Waveform
– 1
t
r
90 %
50 %
t
PHL
90 %
90 %
50 %
t
f
V
CC
10 %
t
PLH
90 %
50 %
10 %
t
THL
50 %
10 %
t
TLH
0V
Input A
10 %
V
OH
V
OL
Output Y
•
Waveform – 2
90 %
t
f
t
r
90 %
50 %
10 %
t
LZ
V
CC
0V
V
OH
Input
G
50 %
10 %
t
ZL
Waveform - A
t
ZH
Waveform - B
50 %
t
HZ
10 %
V
OL
V
OH
V
OL
50 %
90 %
Notes : 1. Input waveform : PRR
≤
1 MHz, duty cycle 50%, t
r
≤
6 ns, t
f
≤
6 ns
2. Waveform - A is for an output with internal conditions such that the
output is low except when disabled by the output control.
3. Waveform - B is for an output with internal conditions such that the
output is high except when disabled by the output control.
4. The output are measured one at a time with one transition per measurement.
Rev.2.00 Mar 30, 2006 page 5 of 8
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