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SN74AVC2T872 データシート(PDF) 3 Page - Texas Instruments

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部品番号 SN74AVC2T872
部品情報  SN74AVC2T872
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メーカー  TI [Texas Instruments]
ホームページ  http://www.ti.com
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SN74AVC2T872 データシート(HTML) 3 Page - Texas Instruments

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SN74AVC2T872
www.ti.com........................................................................................................................................................................................... SCES710 – NOVEMBER 2008
TERMINAL FUNCTIONS
BALL NO.
NAME
FUNCTION
Input to enable pulldown resistors on B-side. PD_EN = Low will disconnect the pulldown resistors.
A1
PD_EN
PD_EN = High will connect the pulldown resistors.
A2, B2
VCCA
A-side supply voltage (1.1 V to 3.6 V)
A3
VCCB
B-side supply voltage (1.1 V to 3.6 V)
B1
D+(A)
USB data signal connected to host.
USB data signal connected to peripheral with internal 120 k
Ω resistor to GND that can be
B3
D+(B)
disconnected by PD_EN.
C1
D–(A)
USB data signal connected to host.
C2, D2
GND
Ground
USB data signal connected to peripheral with internal 120 k
Ω resistor to GND that can be
C3
D–(B)
disconnected by PD_EN.
Direction control input. If DIR_POL = Low, then DIR = Low allows A to B data flow.
D1
DIR
If DIR_POL = High, then DIR = High allows A to B data flow.
Direction polarity chooser. If DIR_POL = Low, then DIR = Low allows A to B data flow.
D3
DIR_POL
If DIR_POL = High, then DIR = High allows A to B data flow.
FUNCTION TABLE
INPUTS
A-SIDE
B-SIDE
FUNCTION
DIR_POL
DIR
L
L
Input
Output
A-to-B Data Flow
L
H
Output
Input
B-to-A Data Flow
H
L
Output
Input
B-to-A Data Flow
H
H
Input
Output
A-to-B Data Flow
B-SIDE PULLDOWN RESISTOR BEHAVIOR
PULLDOWN RESISTOR
VCCA
VCCB
PD_EN
B-SIDE
0 V
X
X
None
1.1 to 3.6 V
0 V
X
120 k
Ω to GND
1.1 to 3.6 V
1.1 to 3.6 V
L
None
1.1 to 3.6 V
1.1 to 3.6 V
H
120 k
Ω to GND
Copyright © 2008, Texas Instruments Incorporated
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