HD74LVC16245A
16-bit Bus Transceivers with 3-state Outputs
Description
The HD74LVC16245A has sixteen two direction buffers, for the fittest at two direction bus lines with
three state outputs. A direction control input, DIR. When DIR is high, data flows from the A inputs to
the B outputs. When DIR is high, data flows from the B inputs to the A outputs. When enable inputs (
*
)
is high, disables both A and B ports by placing then in a high impedance. 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)
All outputs V
OUT
(Max.) = 5.5 V (@V
CC
= 0 V or output off state)
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
*
L
L
H
H:
L:
X:
Z:
High level
Low level
Immaterial
High impedance
DIR
L
H
X
Operation
B data to A bus
A data to B bus
Z
HD74LVC16245A
Absolute Maximum Ratings
Item
Supply voltage
Input diode current
Input voltage
Output diode current
Symbol
V
CC
I
IK
V
I
I
OK
V
I/O
I
O
I
CC
or I
GND
Tstg
Ratings
–0.5 to 6.0
–50
–0.5 to 6.0
–50
50
Input / Output voltage
–0.5 to V
CC
+0.5
–0.5 to 6.0
Output current
V
CC
, GND current / pin
Storage temperature
±50
100
–65 to +150
Unit
V
mA
V
mA
mA
V
V
mA
mA
°C
V
I
= –0.5 V
Conditions
*
, DIR
V
O
= –0.5 V
V
O
= V
CC
+0.5 V
Output "H" or "L"
Output "Z" or V
CC
:OFF
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.
Recommended Operating Conditions
Item
Supply voltage
Symbol
V
CC
V
I
V
I/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
V
°C
mA
mA
mA
mA
ns/V
Conditions
Data retention
At operation
Input / output voltage
0 to 5.5
0 to V
CC
0 to 5.5
–40 to 85
–12
–24
12
24
*2
*2
*
, DIR
Output "H" or "L"
Output "Z" or V
CC
:OFF
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
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