HD74LS640
Block Diagram
Enable
G
Transceiver (1/8)
B
A
Direction
Control DIR
Absolute Maximum Ratings
Item
Supply voltage
Input voltage
Power dissipation
Storage temperature
Symbol
V
CC
V
IN
P
T
Tstg
Ratings
7
7
400
–65 to +150
Unit
V
V
mW
°C
Note: Voltage value, unless otherwise noted, are with respect to network ground terminal.
Recommended Operating Conditions
Item
Supply voltage
Output current
Operating temperature
Symbol
V
CC
I
OH
I
OL
Topr
Min
4.75
—
—
–20
Typ
5.00
—
—
25
Max
5.25
–15
24
75
Unit
V
mA
mA
°C
Electrical Characteristics
(Ta = –20 to +75 °C)
Item
Input voltage
Hysteresis
Symbol
V
IH
V
IL
V
T+
– V
T–
V
OH
Output voltage
V
OL
Output current
I
OZH
I
OZL
I
IH
I
IL
I
I
I
OS
**
I
CCH
I
CCL
I
CCZ
V
IK
min.
2.0
—
0.2
2.4
2
—
—
—
—
—
—
—
—
–40
—
—
—
—
typ.*
—
—
—
—
—
—
—
—
—
—
—
—
—
—
48
62
64
—
max.
—
0.8
—
—
—
0.4
0.5
20
–400
20
–400
0.1
0.1
–225
70
90
95
–1.5
Unit
V
V
V
V
V
V
V
µA
µA
µA
µA
mA
mA
mA
mA
mA
mA
V
Condition
V
CC
= 4.75 V
I
OH
= –3 mA
I
OH
= –15 mA
I
OL
= 12 mA
I
OL
= 24 mA
V
O
= 2.7 V
V
O
= 0.4 V
V
CC
= 4.75 V,
V
IH
= 2 V, V
IL
= 0.8 V
V
CC
= 4.75 V,
V
IH
= 2 V, V
IL
= 0.8 V
V
CC
= 5.25 V,
G
input = 2 V
Input
current
A or B
DIR or
G
Short-circuit output current
Supply current
V
CC
= 5.25 V, V
I
= 2.7 V
V
CC
= 5.25 V, V
I
= 0.4 V
V
I
= 5.5 V
V
CC
= 5.25 V
V
I
= 7 V
V
CC
= 5.25 V
V
CC
= 5.25 V, Output open
Input clamp voltage
V
CC
= 4.75 V, I
IN
= –18 mA
Notes: * V
CC
= 5 V, Ta = 25°C
** Not more than one output shall be shorted at a time. the duration of the short circuit shall not exceed one
second.
Rev.2.00, Feb.18.2005, page 2 of 6
RENESAS [ RENESAS TECHNOLOGY CORP ]
