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Электронный компонент: N74F241AD

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Philips
Semiconductors
74F240/74F240A
Octal inverter buffer (3-State)
74F241/74F241A
Octal buffer (3-State)
Product specification
IC15 Data Handbook
1001 Jan 02
INTEGRATED CIRCUITS
Philips Semiconductors
Product specification
74F240/74F240A/
74F241/74F241A
Buffers
2
January 2, 1991
8530355 01345
FEATURES
Octal bus interface
3-State buffer outputs sink 64mA
15mA source current
Guaranteed output skew less than 2.0ns
(74F240A/74F241A)
Reduced ground bounce (74F240A/74F241A)
Reduced I
CC
(74F241A only)
Reduced loading (74F240A I
IL
= 100
A,
74F241A I
IL
= 40
A)
DESCRIPTION
The 74F240 and 74F241 are octal buffers that are ideal for
driving bus lines of buffer memory address registers. The
outputs are all capable of sinking 64mA and sourcing up to
15mA. The device features two output enables, each
controlling four of the 3state outputs.
The 74F240A and 74F241A are functionally equivalent to
their nonA counterparts. They have been designed to
reduce effects of ground noise. Other advantages are noted
in the features.
TYPE
TYPICAL PROPAGATION DELAY
TYPICAL SUPPLY CURRENT (TOTAL)
74F240
4.3ns
37mA
74F240A
3.8ns
40mA
74F241
5.0ns
53mA
74F241A
4.5ns
32mA
ORDERING INFORMATION
ORDER CODE
DESCRIPTION
COMMERCIAL RANGE
V
CC
= 5V
10%, T
amb
= 0
C to +70
C
PKG DWG #
20pin plastic DIP
N74F240N, N74F240AN, N74F241N, N74F241AN
SOT146-1
20pin plastic SOL
N74F240D, N74F240AD, N74F241D, N74F241AD
SOT163-1
20-pin plastic SSOP II
N74F240DB
SOT339-1
INPUT AND OUTPUT LOADING AND FAN OUT TABLE
PINS
DESCRIPTION
74F (U.L.)
HIGH/LOW
LOAD VALUE
HIGH/LOW
Data inputs (74F240)
1.0/1.67
20
A/1.0mA
Ian, Ibn
Data inputs (74F240A)
1.0/0.167
20
A/100
A
Data inputs (74F241)
1.0/2.67
20
A/1.6mA
Data inputs (74F241A)
1.0/0.067
20
A/40
A
OEa, OEb
Output enable inputs (active low) (74F240)
1.0/0.33
20
A/0.2mA
Output enable inputs (active low) (74F240A)
1.0/0.167
20
A/100
A
OEa, OEb
Output enable input (74F241)
1.0/1.67
20
A/1.0mA
Output enable input (74F241A)
1.0/0.067
20
A/40
A
Yan, Ybn
Data outputs (74F241, 74F241A)
750/106.7
15mA/64mA
Yan, Ybn
Data outputs (74F240, 74F240A)
750/106.7
15mA/64mA
Note to input and output loading and fan out table
One (1.0) FAST unit load is defined as: 20
A in the high state and 0.6mA in the low state.
Philips Semiconductors
Product specification
74F240/74F240A/
74F241/74F241A
Buffers
January 2, 1991
3
PIN CONFIGURATION FOR 74F240/74F240A
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
SF00320
OEa
Ia0
Yb0
Ia1
Yb1
Ia2
Yb2
Ia3
Yb3
GND
V
CC
OEb
Ya0
Ib0
Ya1
Ib1
Ya2
Ib2
Ya3
Ib3
LOGIC SYMBOL FOR 74F240/74F240A
V
CC
= Pin 20
GND = Pin 10
SF00321
1
19
OEa
OEb
2
4
6
8
17
15
13
11
18
16
14
12
3
5
7
9
Ia0
Ia1
Ia2
Ia3
Ib0
Ib1
Ib2 Ib3
Ya0 Ya1 Ya2 Ya3 Yb0 Yb1 Yb2 Yb3
IEC/IEEE SYMBOL FOR 74F240/74F240A
2D
1
2
SF00322
1
19
EN1
EN2
4
2
6
8
17
15
13
11
18
16
14
12
3
5
7
9
LOGIC DIAGRAM FOR 74F240/74F240A
V
CC
= Pin 20
GND = Pin 10
SF00323
Yb0
Yb1
Yb2
Yb3
3
5
7
9
17
15
13
11
10
Ya0
Ya1
Ya2
Ya3
18
16
14
12
2
4
6
8
1
Ib0
Ib1
Ib2
Ib3
OEb
Ia0
Ia1
Ia2
Ia3
OEa
FUNCTION TABLE FOR 74F240/74F240A
INPUTS
OUTPUTS
OEa
Ia
OEb
Ib
Ya
Yb
L
L
L
L
H
H
L
H
L
H
L
L
H
X
H
X
Z
Z
Notes to function table for 74F240/74F240A
H = High voltage level
L
= Low voltage level
X = Don't care
Z = High impedance "off" state
Philips Semiconductors
Product specification
74F240/74F240A/
74F241/74F241A
Buffers
January 2, 1991
4
PIN CONFIGURATION FOR 74F241/74F241A
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
SF00324
OEa
Ia0
Yb0
Ia1
Yb1
Ia2
Yb2
Ia3
Yb3
GND
V
CC
OEb
Ya0
Ib0
Ya1
Ya2
Ib2
Ya3
Ib3
Ib1
LOGIC SYMBOL FOR 74F241/74F241A
V
CC
= Pin 20
GND = Pin 10
SF00325
2
4
6
8
17
15
13
11
18
16
14
12
3
5
7
9
Ia0
Ia1 Ia2
Ia3 Ib0
Ib1 Ib2
Ib3
1
19
OEa
OEb
Ya0 Ya1 Ya2 Ya3 Yb0 Yb1 Yb2 Yb3
IEC/IEEE SYMBOL FOR 74F241/74F241A
2D
1
2
SF00326
1
19
2
4
6
8
17
15
13
11
EN1
EN2
18
16
14
12
3
5
7
9
LOGIC DIAGRAM FOR 74F241/74F241A
V
CC
= Pin 20
GND = Pin 10
SF00327
3
5
7
9
Yb0
Yb1
Yb2
Yb3
18
16
14
12
Ya0
Ya1
Ya2
Ya3
Ib0
Ib1
Ib2
Ib3
OEb
17
15
13
11
10
Ia0
Ia1
Ia2
Ia3
OEa
2
4
6
8
1
FUNCTION TABLE FOR 74F241/74F241A
INPUTS
OUTPUTS
OEa
Ia
OEb
Ib
Ya
Yb
L
L
H
L
L
L
L
H
H
H
H
H
H
X
L
X
Z
Z
Notes to function table for 74F241/74F241A
H = High voltage level
L
= Low voltage level
X = Don't care
Z = High impedance "off" state
Philips Semiconductors
Product specification
74F240/74F240A/
74F241/74F241A
Buffers
January 2, 1991
5
ABSOLUTE MAXIMUM RATINGS
(Operation beyond the limit 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
PARAMETER
RATING
UNIT
V
CC
Supply voltage
0.5 to +7.0
V
V
IN
Input voltage
0.5 to +7.0
V
I
IN
Input current
30 to +5
mA
V
OUT
Voltage applied to output in high output state
0.5 to V
CC
V
I
OUT
Current applied to output in low output state
128
mA
T
amb
Operating free air temperature range
0 to +70
C
T
stg
Storage temperature range
65 to +150
C
RECOMMENDED OPERATING CONDITIONS
SYMBOL
PARAMETER
LIMITS
UNIT
MIN
NOM
MAX
V
CC
Supply voltage
4.5
5.0
5.5
V
V
IH
Highlevel input voltage
2.0
V
V
IL
Lowlevel input voltage
0.8
V
I
Ik
Input clamp current
18
mA
I
OH
Highlevel output current
15
mA
I
OL
Lowlevel output current
64
mA
T
amb
Operating free air temperature range
0
+70
C