NXP Semiconductors
74HC240; 74HCT240
Octal buffer/line driver; 3-state; inverting
Table 2.
Symbol
2A0
1Y0
2OE
V
CC
Pin description
…continued
Pin
17
18
19
20
Description
data input
bus output
output enable input (active LOW)
supply voltage
6. Functional description
Table 3.
Input
nOE
L
L
H
[1]
H = HIGH voltage level;
L = LOW voltage level;
X = don’t care;
Z = high-impedance OFF-state.
Function table
Output
nAn
L
H
X
nYn
H
L
Z
7. Limiting values
Table 4.
Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134). Voltages are referenced to GND (ground = 0 V).
Symbol
V
CC
I
IK
I
OK
I
O
I
CC
I
GND
T
stg
P
tot
Parameter
supply voltage
input clamping current
output clamping current
output current
supply current
ground current
storage temperature
total power dissipation
DIP20 package
SO20, SSOP20, TSSOP20
and DHVQFN20 packages
[1]
For DIP20 packages: above 70
°C,
P
tot
derates linearly with 12 mW/K.
For SO20 packages: above 70
°C,
P
tot
derates linearly with 8 mW/K.
For SSOP20 and TSSOP20 packages: above 60
°C,
P
tot
derates linearly with 5.5 mW/K.
For DHVQFN20 packages: above 60
°C,
P
tot
derates linearly with 4.5 mW/K.
Conditions
V
I
<
−0.5
V or V
I
> V
CC
+ 0.5 V
V
O
<
−0.5
V or V
O
> V
CC
+ 0.5 V
−0.5
V < V
O
< V
CC
+ 0.5 V
Min
−0.5
-
-
-
-
−70
−65
-
-
Max
+7
±20
±20
±35
70
-
+150
750
500
Unit
V
mA
mA
mA
mA
mA
°C
mW
mW
74HC_HCT240_3
© NXP B.V. 2007. All rights reserved.
Product data sheet
Rev. 03 — 2 August 2007
4 of 18
PHILIPS [ NXP SEMICONDUCTORS ]
