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SN74AVCH16T245GQLR Fiches technique(PDF) 2 Page - Texas Instruments

No de pièce SN74AVCH16T245GQLR
Description  16-BIT DUAL-SUPPLY BUS TRANSCEIVER WITH CONFIGURABLE VOLTAGE TRANSLATION AND 3-STATE OUTPUTS
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Fabricant  TI [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI - Texas Instruments

SN74AVCH16T245GQLR Fiches technique(HTML) 2 Page - Texas Instruments

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SN74AVCH16T245
16BIT DUALSUPPLY BUS TRANSCEIVER
WITH CONFIGURABLE VOLTAGE TRANSLATION AND 3STATE OUTPUTS
SCES587B − AUGUST 2004 − REVISED APRIL 2005
2
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
description/ordering information (continued)
This device is fully specified for partial-power-down applications using Ioff. The Ioff circuitry disables the outputs,
preventing damaging current backflow through the device when it is powered down.
The VCC isolation feature ensures that if either VCC input is at GND, then both ports are in the high-impedance
state.
Active bus-hold circuitry holds unused or undriven inputs at a valid logic state. Use of pullup or pulldown resistors
with the bus-hold circuitry is not recommended.
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.
terminal assignments
12
34
5
6
A
1DIR
NC
NC
NC
NC
1OE
B
1B2
1B1
GND
GND
1A1
1A2
C
1B4
1B3
VCCB
VCCA
1A3
1A4
D
1B6
1B5
GND
GND
1A5
1A6
E
1B8
1B7
1A7
1A8
F
2B1
2B2
2A2
2A1
G
2B3
2B4
GND
GND
2A4
2A3
H
2B5
2B6
VCCB
VCCA
2A6
2A5
J
2B7
2B8
GND
GND
2A8
2A7
K
2DIR
NC
NC
NC
NC
2OE
NC − No internal connection
FUNCTION TABLE
(each 8-bit section)
INPUTS
OPERATION
OE
DIR
OPERATION
L
L
B data to A bus
L
H
A data to B bus
H
X
Isolation
GQL OR ZQL PACKAGE
(TOP VIEW)
J
H
G
F
E
D
C
B
A
2
13
4
6
5
K


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