TECHNICAL DATA
IN74LV640
Octal 3-State Inverting
Bus Transceiver
The 74LV640 is a low-voltage Si-gate CMOS device and is pin and
function compatible with 74HC/HCT640.
The 74LV640 provides six inverting buffers with Schmitt-trigger
action.
•
•
•
•
Wide Operating Voltage: 1.2 to 3.6 V
Optimized for Low Voltage applications: 1.0 to 3.6 V
Accepts TTL input levels between V
CC
=2.7 V and V
CC
=3.6 V
Low input current
ORDERING INFORMATION
IN74LV640N Plastic
IN74LV640D SOIC
IZ74LV640 Chip
T
A
= -40° to 125° C for all packages
PIN ASSIGNMENT
DIR
01
A
1
02
20
19
18
17
16
V
CC
OE
B
1
B
2
B
3
B
4
B
5
B
6
B
7
B
8
LOGIC DIAGRAM
DIR
01
OE
A
1
B
1
03
A
2
B
2
04
A
3
B
3
05
A
4
B
4
06
A
5
B
5
07
A
6
B
6
08
A
7
B
7
A
8
09
B
8
11
12
13
14
15
16
17
18
19
A
2
03
A
3
04
A
4
05
A
5
06
A
6
07
A
7
08
A
8
09
GND
10
640
15
14
13
12
11
02
FUNCTION TABLE
Inputs
OE
L
L
H
DIR
L
H
X
Inputs/Outputs
À
A=B
input
Z
Â
input
B=A
Z
PIN 20=V
CC
PIN 10 = GND
1
IN74LV640
MAXIMUM RATINGS
*
Symbol
V
CC
I
IK
*
1
I
OK
*
2
Io*
3
I
GND
I
CC
P
D
Tstg
T
L
*
Parameter
DC supply voltage (Referenced to GND)
DC input diode current
DC output diode current
DC output source or sink current
-bus driver outputs
DC GND current for types with
- bus driver outputs
DC V
CC
current for types with
- bus driver outputs
Power dissipation per paskade, plastic DIP+
SOIC package+
Storage temperature
Lead temperature, 1.5 mm from Case for 10 seconds
(Plastic DIP ), 0.3 mm (SOIC Package)
Value
-0.5
÷
+5.0
±20
±50
±35
±70
±70
750
500
-65
÷
+150
260
Unit
V
mA
mA
mA
mA
mA
mW
°C
°C
Maximum Ratings are those values beyond which damage to the device may occur.
Functional operation should be restricted to the Recommended Operating Conditions.
+Derating - Plastic DIP: - 12 mW/°C from 65° to 125°C
SOIC Package: : - 8 mW/°C from 65° to 125°C
1
* : V
I
<
-0.5V or V
I
>
V
CC
+0.5V
*
2
: Vo
<
-0.5V or Vo
>
V
CC
+0.5V
*
3
: -0.5V
<
Vo
<
V
CC
+0.5V
RECOMMENDED OPERATING CONDITIONS
Symbol
V
CC
V
IN,
V
OUT
T
A
t
LH
, t
HL
Parameter
DC Supply Voltage (Referenced to GND)
DC Input Voltage (Referenced to GND)
Operating Temperature, All Package Types
Input Rise and Fall Time
V
CC
=1.2 V
V
CC
=2.0 V
V
CC
=3.0 V
V
CC
=3.6 V
Min
1.2
0
-40
0
Max
3.6
V
CC
+125
1000
700
500
400
Unit
V
V
°C
ns
This device contains protection circuitry to guard against damage due to high static voltages or electric
fields. However, precautions must be taken to avoid applications of any voltage higher than maximum rated
voltages to this high-impedance circuit. For proper operation, V
IN
and V
OUT
should be constrained to the range
GND≤(V
IN
or V
OUT
)≤V
CC
.
Unused inputs must always be tied to an appropriate logic voltage level (e.g., either GND or V ).
CC
Unused outputs must be left open.
2
Microcontroller MCU
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