INTEGRATED CIRCUITS
74F540
Octal inverter buffer (3- State)
74F541
Octal buffer (3- State)
Product specification
IC15 Data Handbook
1990 Jan 08
Philips
Semiconductors
Philips Semiconductors
Product specification
Buffers
74F540 Octal Inverter Buffer (3-State)
74F541 Octal Buffer (3-State)
FEATURES
74F540, 74F541
•
High impedance NPN base inputs for reduced loading
(20µA in High and Low states)
TYPE
74F540
74F541
TYPICAL
PROPAGATION DELAY
3.5ns
5.5ns
TYPICAL SUPPLY
CURRENT
(TOTAL)
58mA
55mA
•
Low power, light bus loading
•
Functionally similar to the 74F240 and 74F241
•
Provides ideal interface and increases fan-out of MOS
microprocessors
•
Efficient pinout to facilitate PC board layout
•
Octal bus interface
•
3-State buffer outputs sink 64mA
•
15mA source current
DESCRIPTION
The 74F540 and 74F541 are octal buffers that are ideal for driving
bus lines or buffer memory address registers. The outputs are
capable of sinking 64mA and sourcing up to 15mA, producing very
good capacitive drive characteristics. The devices feature input and
outputs on opposite sides of the package to facilitate printed circuit
board layout.
ORDERING INFORMATION
DESCRIPTION
20-Pin Plastic DIP
20-Pin Plastic SOL
COMMERCIAL RANGE
V
CC
= 5V
±10%,
T
amb
= 0°C to +70°C
N74F540, N74F541N
N74F540D, N74F541D
PKG DWG #
SOT146-1
SOT163-1
INPUT AND OUTPUT LOADING AND FAN-OUT TABLE
PINS
I0–I7
OE0, OE1
Y0 - Y7
Y0 - Y7
Data inputs
3-State output enable inputs (active Low)
Data outputs (74F541)
Data outputs (74F540)
DESCRIPTION
74F(U.L.)
HIGH/LOW
1.0/0.033
1.0/0.033
750/106.7
750/106.7
LOAD VALUE
HIGH/LOW
20µA/20µA
20µA/20µA
15mA/64mA
15mA/64mA
NOTE:
One (1.0) FAST Unit Load is defined as: 20µA in the High state and 0.6mA in the Low state.
PIN CONFIGURATION – 74F540
OE0
I0
I1
I2
I3
I4
I5
I6
I7
1
2
3
4
5
6
7
8
9
20 V
CC
19 OE1
18 Y0
17 Y1
16 Y2
15 Y3
14 Y4
13 Y5
12 Y6
11 Y7
PIN CONFIGURATION – 74F541
OE0
I0
I1
I2
I3
I4
I5
I6
I7
1
2
3
4
5
6
7
8
9
20 V
CC
19 OE1
18 Y0
17 Y1
16 Y2
15 Y3
14 Y4
13 Y5
12 Y6
11 Y7
GND 10
GND 10
SF01060
SF01021
1990 Jan 08
2
853–0068 98494
Philips Semiconductors
Product specification
Buffers
74F540, 74F541
LOGIC SYMBOL – 74F540
2
3
4
5
6
7
8
9
LOGIC SYMBOL – 74F541
2
3
4
5
6
7
8
9
I0
1
19
OE0
OE1
Y0
I1
I2
I3
I4
I5
I6
I7
1
19
I0
OE0
OE1
Y0
I1
I2
I3
I4
I5
I6
I7
Y1
Y2
Y3
Y4
Y5
Y6
Y7
Y1
Y2
Y3
Y4
Y5
Y6
Y7
V
CC
= Pin 20
GND = Pin 10
18
17
16
15
14
13
12
11
V
CC
= Pin 20
GND = Pin 10
18
17
16
15
14
13
12
11
SF01022
SF01023
LOGIC SYMBOL (IEEE/IEC) – 74F540
1
19
&
EN
LOGIC SYMBOL (IEEE/IEC) – 74F541
1
19
&
EN
2
3
4
5
6
7
8
9
18
17
16
15
14
13
12
11
2
3
4
5
6
7
8
9
18
17
16
15
14
13
12
11
SF01024
SF01025
LOGIC DIAGRAM – 74F540
OE0 1
OE1
I0
19
2
18
Y0
LOGIC DIAGRAM – 74F541
OE0
1
OE1 19
I0
2
18
Y0
I1 3
17
Y1
I1 3
17
Y1
I2 4
5
16
Y2
I2 4
5
16
Y2
I3
15
Y3
I3
15
Y3
I4
6
14
Y4
I4
6
14
Y4
13
I5 7
8
13
Y5
I5 7
Y5
I6
12
Y6
I6 8
12
Y6
I7
V
CC
=
GND =
Pin 20
Pin 10
9
11
Y7
V
CC
=
GND =
Pin 20
Pin 10
I7 9
11
Y7
SF01026
SF01027
1990 Jan 08
3
Philips Semiconductors
Product specification
Buffers
74F540, 74F541
FUNCTION TABLE
INPUTS
OE0
L
L
X
H
H
L
X
Z
=
=
=
=
OE1
L
L
H
X
In
L
H
X
X
OUTPUTS
74F541
Yn
L
H
Z
Z
74F540
Yn
H
L
Z
Z
High voltage level
Low voltage level
Don’t care
High impedance “off” state
ABSOLUTE MAXIMUM RATINGS
(Operation beyond the limits set forth in this table may impair the useful life of the device.
Unless otherwise noted these limits are over the operating free-air temperature range.)
SYMBOL
V
CC
V
IN
I
IN
V
OUT
I
OUT
T
amb
T
stg
Supply voltage
Input voltage
Input current
Voltage applied to output in High output state
Current applied to output in Low output state
Operating free-air temperature range
Storage temperature
PARAMETER
RATING
–0.5 to +7.0
–0.5 to +7.0
–30 to +5.0
–0.5 to +V
CC
128
0 to +70
–65 to +150
UNIT
V
V
mA
V
mA
°C
°C
RECOMMENDED OPERATING CONDITIONS
SYMBOL
V
CC
V
IH
V
IL
I
IK
I
OH
I
OL
T
amb
Supply voltage
High-level input voltage
Low-level input voltage
Input clamp current
High-level output current
Low-level output current
Operating free-air temperature range
0
PARAMETER
LIMITS
MIN
4.5
2.0
0.8
–18
–15
64
70
NOM
5.0
MAX
5.5
UNIT
V
V
V
mA
mA
mA
°C
1990 Jan 08
4
Philips Semiconductors
Product specification
Buffers
74F540, 74F541
DC ELECTRICAL CHARACTERISTICS
(Over recommended operating free-air temperature range unless otherwise noted.)
LIMITS
SYMBOL
PARAMETER
TEST
CONDITIONS
NO TAG
MIN
±10%V
CC
±5%V
CC
±10%V
CC
±5%V
CC
±10%V
CC
I
O
= MAX
OL
±5%V
CC
0.42
–0.73
2.4
2.7
2.0
2.0
0.55
0.55
–1.2
100
20
–20
50
–50
–100
22
58
40
30
55
45
–225
30
75
55
40
72
58
3.4
TYP
NO TAG
UNIT
MAX
V
V
V
V
V
V
V
µA
µA
µA
µA
µA
mA
mA
mA
mA
mA
mA
mA
V
O
OH
High-level
High level output voltage
V
CC
= MIN,
V
IL
= MAX
MAX,
V
IH
= MIN
I
O
= –3mA
3mA
OH
I
O
= –15mA
15mA
OH
V
O
OL
V
IK
I
I
I
IH
I
IL
I
OZH
I
OZL
I
OS
Low-level
Low level output voltage
Input clamp voltage
Input current at maximum input
voltage
High-level input current
Low-level input current
Off-state output current
High-level voltage applied
Off-state output current
Low-level voltage applied
Short-circuit output current
NO TAG
I
CCH
74F540
I
CCL
I
CCZ
I
CCH
74F541
I
CCL
I
CCZ
V
CC
= MIN,
V
IL
= MAX,
MAX
V
IH
= MIN
V
CC
= MIN, I
I
= I
IK
V
CC
= 0.0V, V
I
= 7.0V
V
CC
= MAX, V
I
= 2.7V
V
CC
= MAX, V
I
= 0.5V
V
CC
= MAX, V
O
= 2.7V
V
CC
= MAX, V
O
= 0.5V
V
CC
= MAX
In=OEn=GND
In=4.5V, OEn=GND
In=GND, OEn=4.5V
V
CC
= MAX
In=4.5V, OEn=GND
In=OEn=GND
In=GND, OEn=4.5V
I
CC
Supply current
y
(total)
NOTES:
1. For conditions shown as MIN or MAX, use the appropriate value under the recommended operating conditions for the applicable type.
2. All typical values are at V
CC
= 5V, T
amb
= 25°C.
3. Not more than one output should be shorted at a time. For testing I
OS
, the use of high-speed test apparatus and/or sample-and-hold
techniques are preferable in order to minimize internal heating and more accurately reflect operational values. Otherwise, prolonged shorting
of a High output may raise the chip temperature well above normal and thereby cause invalid readings in other parameter tests. In any
sequence of parameter tests, I
OS
should be performed last.
1990 Jan 08
5
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