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HD74LVC4245ATEL Datasheet

  • HD74LVC4245ATEL

  • Bus Transceiver

  • 14頁

  • ETC

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HD74LVC4245A
Octal Bus Transceiver and 3.3 V to 5 V shifters
with 3-state Outputs
ADE-205-683 (Z)
Rev.0
Apr. 2002
Description
The HD74LVC4245A has eight bus transceivers with three state outputs in a 24 pin package. When (DIR)
is high, data flows from the A inputs to the B outputs, and when (DIR) is low, data flows from the B inputs
to the A outputs. A and B bus are separated by making enable input (OE) high level. And this product has
two terminals (V
CCA
, V
CCB
), V
CCA
(5V) is connected with control input and A bus side, V
CCB
(3.3V) connected
with B bus side. V
CCA
and V
CCB
are isolated. This allows for translation from a 3.3 V to a 5 V environment,
and vice versa. 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
鈥?/div>
This product function as level shift transceiver that change V
CCA
input level to V
CCB
output level, V
CCB
input level to V
CCA
output level by providing different supply voltage to V
CCA
and V
CCB
.
鈥?/div>
This product is able to the power management: Turn on and off the supply on V
CCB
side with providing
the supply of V
CCA
. (Enable input (OE): High level )
鈥?/div>
V
CCA
= 4.5 V to 5.5 V, V
CCB
= 2.7 V to 3.6 V
鈥?/div>
All control input V
I
(max) = 5.5 V (@V
CCA
= 0 V to 5.5 V)
鈥?/div>
All A bus side input outputs V
I/O
(max) = 5.5 V
(@V
CCA
= 0 V or output off state)
鈥?/div>
All B bus side input outputs V
I/O
(max) = 3.6 V
(@V
CCB
= 0 V or output off state)
鈥?/div>
High output current
A bus side : 鹵24 mA (@V
CCA
= 4.5 V to 5.5 V)
B bus side : 鹵12 mA (@V
CCB
= 2.7 V)
鹵24 mA (@V
CCB
= 3.0 V to 3.6 V)

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