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SN74LVT245B Fiches technique(PDF) 2 Page - Texas Instruments

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No de pièce SN74LVT245B
Description  3.3-V ABT OCTAL BUS TRANSCEIVER WITH 3-STATE OUTPUTS
Download  15 Pages
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Fabricant  TI [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI - Texas Instruments

SN74LVT245B Fiches technique(HTML) 2 Page - Texas Instruments

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SN74LVT245B
3.3V ABT OCTAL BUS TRANSCEIVER
WITH 3STATE OUTPUTS
SCES004H − JANUARY 1995 − REVISED SEPTEMBER 2003
2
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
description/ordering information (continued)
To ensure the high-impedance state during power up or power down, OE should be tied to VCC through a pullup
resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.
This device is fully specified for hot-insertion applications using Ioff and power-up 3-state. The Ioff circuitry
disables the outputs, preventing damaging current backflow through the device when it is powered down. The
power-up 3-state circuitry places the outputs in the high-impedance state during power up and power down,
which prevents driver conflict.
terminal assignments
1234
A
A1
DIR
VCC
OE
B
A3
B2
A2
B1
C
A5
A4
B4
B3
D
A7
B6
A6
B5
E
GND
A8
B8
B7
FUNCTION TABLE
INPUTS
OPERATION
OE
DIR
OPERATION
L
L
B data to A bus
L
H
A data to B bus
H
X
Isolation
logic diagram (positive logic)
DIR
OE
A1
B1
To Seven Other Channels
1
2
19
18
Pin numbers shown are for the DB, DW, NS, PW, and RGY packages.
GQN OR ZQN PACKAGE
(TOP VIEW)
1
234
A
B
C
D
E


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