HD74LV245A
Octal Bus Transceivers with 3-state Outputs
REJ03D0329–0300Z
(Previous ADE-205-247A (Z))
Rev.3.00
Jun. 24, 2004
Description
The HD74LV245A has eight buffers with three-state outputs in a 20-pin package. When DIR is high, data is
transferred from the A inputs to the B outputs, and when DIR is low, data is transferred from the B inputs to the A
outputs. The A and B buses are separated by making the enable input (OE) high level. Low-voltage operation is
suitable for battery-powered products (e.g., notebook computers), and the low power consumption extends the battery
life.
Features
•
V
CC
= 2.0 V to 5.5 V operation
•
All inputs V
IH
(Max.) = 5.5 V (@V
CC
= 0 V to 5.5 V)
•
All outputs V
O
(Max.) = 5.5 V (@V
CC
= 0 V)
•
Typical V
OL
ground bounce < 0.8 V (@V
CC
= 3.3 V, Ta = 25°C)
•
Typical V
OH
undershoot > 2.3 V (@V
CC
= 3.3 V, Ta = 25°C)
•
Output current ±8 mA (@V
CC
= 3.0 V to 3.6 V), ±16 mA (@V
CC
= 4.5 V to 5.5 V)
Ordering Information
Part Name
HD74LV245AFPEL
HD74LV245ARPEL
HD74LV245ATELL
Package Type
SOP–20 pin (JEITA)
SOP–20 pin (JEDEC)
TSSOP–20 pin
Package Code
FP–20DAV
FP–20DBV
TTP–20DAV
Package
Abbreviation
FP
RP
T
Taping Abbreviation
(Quantity)
EL (2,000 pcs/reel)
EL (1,000 pcs/reel)
ELL (2,000 pcs/reel)
Note: Please consult the sales office for the above package availability.
Function Table
Inputs
OE
L
L
H
Note: H: High level
L: Low level
X: Immaterial
DIR
L
H
X
Operation
B data to A bus
A data to B bus
Isolation
Rev.3.00 Jun. 24, 2004 page 1 of 9
HD74LV245A
Pin Arrangement
DIR 1
A1
A2
2
3
20 V
CC
19
OE
18 B1
17 B2
16 B3
15 B4
14 B5
13 B6
12 B7
11 B8
A3 4
A4
A5
A6
A7
A8
5
6
7
8
9
GND 10
(Top view)
Absolute Maximum Ratings
Item
Supply voltage range
Input voltage range*
1
Output voltage range*
1,
*
2
Input clamp current
Output clamp current
Continuous output current
Continuous current through
V
CC
or GND
Maximum power dissipation at
Ta = 25°C (in still air)*
3
Storage temperature
Symbol
V
CC
V
I
V
O
I
IK
I
OK
I
O
I
CC
or
I
GND
P
T
Tstg
Ratings
–0.5 to 7.0
–0.5 to 7.0
–0.5 to V
CC
+ 0.5
–0.5 to 7.0
–20
±50
±35
±70
835
757
–65 to 150
Unit
V
V
V
mA
mA
mA
mA
mW
°C
Conditions
Output: H or L
V
CC
: OFF or Output: Z
V
I
< 0
V
O
< 0 or V
O
> V
CC
V
O
= 0 to V
CC
SOP
TSSOP
Notes: 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.
1. The input and output voltage ratings may be exceeded even if the input and output clamp-current ratings are
observed.
2. This value is limited to 5.5 V maximum.
3. The data above are measured by
∆V
BE
method mounting on glass epoxy board (40
×
40
×
1.6 mm) with 10%
of wiring density.
Rev.3.00 Jun. 24, 2004 page 2 of 9
HD74LV245A
Recommended Operating Conditions
Item
Supply voltage range
Input voltage range
Output voltage range
Output current
Symbol
V
CC
V
I
V
O
I
OH
Min
2.0
0
0
0
—
—
—
—
—
—
—
—
0
0
0
–40
Max
5.5
5.5
V
CC
5.5
–50
–2
–8
–16
50
2
8
16
200
100
20
85
Unit
V
V
V
µA
mA
Conditions
I
OL
µA
mA
Input transition rise or fall rate
∆t
/∆v
ns/V
Output: H or L
High impedance state
V
CC
= 2.0 V
V
CC
= 2.3 to 2.7 V
V
CC
= 3.0 to 3.6 V
V
CC
= 4.5 to 5.5 V
V
CC
= 2.0 V
V
CC
= 2.3 to 2.7 V
V
CC
= 3.0 to 3.6 V
V
CC
= 4.5 to 5.5 V
V
CC
= 2.3 to 2.7 V
V
CC
= 3.0 to 3.6 V
V
CC
= 4.5 to 5.5 V
Operating free-air temperature
Ta
°C
Note: Unused or floating inputs must be held high or low.
Logic Diagram
DIR
1
19
2
18
OE
A1
B1
Other seven channels
Rev.3.00 Jun. 24, 2004 page 3 of 9
HD74LV245A
DC Electrical Characteristics
Ta = –40 to 85°C
Item
Input voltage
Symbol
V
IH
V
CC
(V)*
1
Min
1.5
V
CC
×
0.7
V
CC
×
0.7
V
CC
×
0.7
—
—
—
—
V
CC
–0.1
2.0
2.48
3.8
—
—
—
—
—
—
—
—
—
—
Typ
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
3.0
5.5
Max
—
—
—
—
0.5
V
CC
×
0.3
V
CC
×
0.3
V
CC
×
0.3
—
—
—
—
0.1
0.4
0.44
0.55
±1
±5
20
5
—
—
Unit
V
Test Conditions
V
IL
Output voltage
V
OH
V
OL
Input current
Off-state output
current
Quiescent supply
current
Output leakage
current
Input capacitance
Output capacitance
I
IN
I
OZ
*
2
I
CC
I
OFF
C
IN
C
O
2.0
2.3 to 2.7
3.0 to 3.6
4.5 to 5.5
2.0
2.3 to 2.7
3.0 to 3.6
4.5 to 5.5
Min to Max
2.3
3.0
4.5
Min to Max
2.3
3.0
4.5
0 to 5.5
5.5
5.5
0
3.3
3.3
V
µA
µA
µA
µA
pF
pF
I
OH
= –50
µA
I
OH
= –2 mA
I
OH
= –8 mA
I
OH
= –16 mA
I
OL
= 50
µA
I
OL
= 2 mA
I
OL
= 8 mA
I
OL
= 16 mA
V
IN
= 5.5 V or GND
V
O
= V
CC
or GND
V
IN
= V
CC
or GND, I
O
= 0
V
I
or V
O
= 0 V to 5.5 V
V
I
= V
CC
or GND
V
O
= V
CC
or GND
Notes: 1. For conditions shown as Min or Max, use the appropriate values under recommended operating conditions.
2. For I/O ports, the parameter I
OZ
includes the input leakage current.
Rev.3.00 Jun. 24, 2004 page 4 of 9
HD74LV245A
Switching Characteristics
V
CC
= 2.5 ± 0.2 V
Ta = 25°C
Item
Propagation
delay time
Enable time
Disable time
Symbol
t
PLH
t
PHL
t
ZH
t
ZL
t
HZ
t
LZ
Min
—
—
—
—
—
—
Typ
8.3
11.2
11.8
14.1
11.8
17.6
Max
13.0
15.9
19.9
22.7
18.1
23.1
Ta = –40 to 85°C
Min
1.0
1.0
1.0
1.0
1.0
1.0
Max
15.0
18.0
22.0
26.0
20.0
25.0
Unit
ns
ns
ns
Test
Conditions
C
L
= 15 pF
C
L
= 50 pF
C
L
= 15 pF
C
L
= 50 pF
C
L
= 15 pF
C
L
= 50 pF
FROM
(Input)
A or B
OE
OE
TO
(Output)
B or A
A or B
A or B
V
CC
= 3.3 ± 0.3 V
Ta = 25°C
Item
Propagation
delay time
Enable time
Disable time
Symbol
t
PLH
t
PHL
t
ZH
t
ZL
t
HZ
t
LZ
Min
—
—
—
—
—
—
Typ
5.9
7.9
8.2
9.9
9.6
13.9
Max
8.4
11.9
13.2
16.7
16.5
19.8
Ta = –40 to 85°C
Min
1.0
1.0
1.0
1.0
1.0
1.0
Max
10.0
13.5
15.5
19.0
19.5
22.0
Unit
ns
ns
ns
Test
Conditions
C
L
= 15 pF
C
L
= 50 pF
C
L
= 15 pF
C
L
= 50 pF
C
L
= 15 pF
C
L
= 50 pF
FROM
(Input)
A or B
OE
OE
TO
(Output)
B or A
A or B
A or B
V
CC
= 5.0 ± 0.5 V
Ta = 25°C
Item
Propagation
delay time
Enable time
Disable time
Symbol
t
PLH
t
PHL
t
ZH
t
ZL
t
HZ
t
LZ
Min
—
—
—
—
—
—
Typ
4.3
5.6
5.7
7.0
7.8
10.9
Max
5.5
7.5
8.5
10.6
12.8
14.7
Ta = –40 to 85°C
Min
1.0
1.0
1.0
1.0
1.0
1.0
Max
6.5
8.5
10.0
12.0
14.2
16.0
Unit
ns
ns
ns
Test
Conditions
C
L
= 15 pF
C
L
= 50 pF
C
L
= 15 pF
C
L
= 50 pF
C
L
= 15 pF
C
L
= 50 pF
FROM
(Input)
A or B
OE
OE
TO
(Output)
B or A
A or B
A or B
Output-skew Characteristics
C
L
= 50 pF
Ta = 25°C
Item
Output skew
Symbol
t
sk (O)
V
CC
(V)
2.3 to 2.7
3.0 to 3.6
4.5 to 5.5
Min
—
—
—
Max
2.0
1.5
1.0
Ta = –40 to 85°C
Min
—
—
—
Max
2.0
1.5
1.0
Unit
ns
Note: Skew between any outputs of the same package switching in the same direction. This parameter is warranted
but not production tested.
Rev.3.00 Jun. 24, 2004 page 5 of 9
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