Philips Semiconductors FAST Products
Product specification
Dual 4-input NAND buffer
74F40
TYPE
TYPICAL
PROPAGATION
DELAY
3.5ns
TYPICAL
SUPPLY CURRENT
(TOTAL)
6mA
PIN CONFIGURATION
D0a
D0b
NC
1
2
3
4
5
6
7
14
13
12
11
10
9
8
V
CC
D1d
D1c
NC
D1b
D1a
Q1
74F40
ORDERING INFORMATION
DESCRIPTION
14-pin plastic DIP
14-pin plastic SO
COMMERCIAL RANGE
V
CC
= 5V
鹵10%,
T
amb
= 0擄C to +70擄C
N74F40N
N74F40D
D0c
D0d
Q0
GND
SF00065
INPUT AND OUTPUT LOADING AND FAN OUT TABLE
PINS
Dna, Dnb, Dnc, Dnd
Q0, Q1
Data inputs
Data outputs
DESCRIPTION
74F (U.L.) HIGH/LOW
1.0/2.0
750/106.7
LOAD VALUE HIGH/LOW
20碌A/1.2mA
15mA/64mA
NOTE:
One (1.0) FAST unit load is defined as: 20碌A in the High state and 0.6mA in the Low state.
LOGIC DIAGRAM
D0a
D0b
D0c
D0d
1
2
6
4
5
Q0
FUNCTION TABLE
INPUTS
Dna
L
X
X
X
Dnb
X
L
X
X
Dnc
X
X
L
X
H
Dnd
X
X
X
X
H
OUTPUT
Qn
H
H
H
H
L
D1a
D1b
D1c
D1d
V
CC
= Pin 14
GND = Pin 7
NC = Pin 3, 11
9
10
8
12
13
Q1
H
H
NOTES:
1. H = High voltage level
2. L = Low voltage level
3. X = Don鈥檛 care
SF00081
LOGIC SYMBOL
IEC/IEEE SYMBOL
1
&
6
1
2
4
5
9
10
12
13
2
4
D0a D0b D0c D0d D1a D1b D1c D1d
5
Q0 Q1
9
10
8
12
6
V
CC
= Pin 14
GND = Pin 7
NC = Pin 3, 11
8
13
SF00082
SF00083
April 11, 1989
1
853鈥?053 96314
1
2
3
