HD74LVC240
Octal Buffers / Line Drivers with 3-state Outputs
ADE-205-109(Z)
Rev.0
October 1995
Description
The HD74LVC240 has eight inverter drivers with three state outputs in a 20 pin package. This device is
a inverting buffer and has two active low enables (1
*
and 2
*
). Each enable independently controls four
buffers. Low voltage and high speed operation is suitable at the battery drive product (note type
personal computer) and low power consumption extends the life of a battery for long time operation.
Features
•
•
•
•
•
V
CC
= 2.0 V to 5.5 V
All inputs V
IH
(Max.) = 5.5 V (@V
CC
= 0 V to 5.5 V)
Typical V
OL
ground bounce < 0.8 V (@V
CC
= 3.3 V, Ta = 25°C)
Typical V
OH
undershoot > 2.0 V (@V
CC
= 3.3 V, Ta = 25°C)
High output current
±24
mA (@V
CC
= 3.0 V to 5.5 V)
Function Table
Inputs
*
H
L
L
H:
L:
X:
Z:
High level
Low level
Immaterial
High impedance
A
X
H
L
Output
<
Z
L
H
HD74LVC240
Pin Arrangement
1G 1
1A1 2
2Y4 3
1A2 4
2Y3 5
1A3 6
2Y2 7
1A4 8
2Y1 9
GND 10
20 V
CC
19 2G
18 1Y1
17 2A4
16 1Y2
15 2A3
14 1Y3
13 2A2
12 1Y4
11 2A1
(Top view)
Absolute Maximum Ratings
Item
Supply voltage
Input diode current
Input voltage
Output diode current
Symbol
V
CC
I
IK
V
I
I
OK
V
O
I
O
I
CC
or I
GND
Tstg
Ratings
–0.5 to 6.0
–50
–0.5 to 6.0
–50
50
Output voltage
Output current
V
CC
, GND current / pin
Storage temperature
–0.5 to V
CC
+0.5
±50
100
–65 to +150
Unit
V
mA
V
mA
mA
V
mA
mA
°C
V
O
= –0.5 V
V
O
= V
CC
+0.5 V
Output "H" or "L"
V
I
= –0.5 V
Conditions
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.
2
HD74LVC240
Recommended Operating Conditions
Item
Supply voltage
Symbol
V
CC
V
I
V
O
Operating temperature
Output current
Ta
I
OH
I
OL
Input rise / fall time
*1
Ratings
1.5 to 5.5
2.0 to 5.5
Unit
V
V
V
V
°C
mA
mA
mA
mA
ns/V
Conditions
Data retention
At operation
Input / output voltage
0 to 5.5
0 to V
CC
–40 to 85
–12
–24
12
24
*2
*2
*
, A
Output "H" or "L"
V
CC
= 2.7 V
V
CC
= 3.0 V to 5.5 V
V
CC
= 2.7 V
V
CC
= 3.0 V to 5.5 V
t
r
, t
f
10
Notes: 1. This item guarantees maximum limit when one input switches.
Waveform : Refer to test circuit of switching characteristics.
2. duty cycle
≤
50%
3
HD74LVC240
Electrical Characteristics
Ta = –40 to 85°C
°
Item
Input voltage
Symbol V
CC
(V)
V
IH
V
IL
Output voltage
V
OH
Min
Max
—
Unit Test Conditions
V
V
V
I
OH
= –100
µA
I
OH
= –12 mA
I
OH
= –24 mA
I
OL
= 100
µA
I
OL
= 12 mA
I
OL
= 24 mA
V
IN
= 5.5 V
CC
GND
V
IN
= one input at (V
CC
–0.6)V,
other inputs at V
CC
or GND
V
IN
= V
CC
, GND
V
OUT
= V
CC
or GND
V
IN
= V
CC
or GND
2.7 to 3.6 2.0
4.5 to 5.5 V
CC
×0.7
—
2.7 to 3.6 —
4.5 to 5.5 —
0.8
V
CC
×0.3
V
V
V
V
V
V
V
V
V
V
µA
µA
µA
µA
—
—
—
—
0.2
0.4
0.55
0.55
±5.0
500
±10
20
2.7 to 5.5 V
CC
–0.2 —
2.7
3.0
3.0
4.5
2.2
2.4
2.0
3.8
V
OL
2.7 to 5.5 —
2.7
3.0
4.5
—
—
—
—
Input current
Quiescent supply
current
Off state output current
Quiescent supply
current
I
IN
∆I
CC
I
OZ
I
CC
0 to 5.5
3.0 to 3.6 —
5.5
5.5
—
—
4
HD74LVC240
Switching Characteristics
Ta = –40 to 85°C
°
Item
Propagation delay time
Symbol V
CC
(V)
t
PLH
t
PHL
Output enable time
t
ZH
t
ZL
Output disable time
t
HZ
t
LZ
Input capacitance
Output capacitance
C
IN
C
O
2.7
3.3±0.3
5.0±0.5
2.7
3.3±0.3
5.0±0.5
2.7
3.3±0.3
5.0±0.5
2.7
2.7
Min
—
1.5
—
—
1.5
—
—
1.5
—
—
—
Typ
6.0
5.0
3.5
7.5
5.5
4.0
5.0
4.5
3.5
3.0
15.0
Max
9.0
8.0
6.5
10.0
8.5
7.0
9.0
8.0
7.0
—
—
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
pF
pF
From (Input) To (Output)
A
<
<
<
*
*
Test Circuit
V
CC
V
CC
1G, 2G
See Function Table
Input
1Y1 to 2Y4
Output
500
Ω
S1
C
L
=
50 pF
450
Ω
50
Ω
Scope
OPEN
See under table
GND
*1
Pulse generator
Z
out
= 50
Ω
1A1 to 2A4
Symbol
t
PLH
/ t
PHL
t
ZH
/ t
HZ
t
ZL
/ t
LZ
S1
Vcc=2.7V,
3.3±0.3V
Vcc=5.0±0.5V
OPEN
GND
6V
OPEN
GND
2×Vcc
Note:
1.
C
L
includes probe and jig capacitance.
5
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