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SN74CB3Q3245RGYR データシート(PDF) 2 Page - Texas Instruments

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部品番号 SN74CB3Q3245RGYR
部品情報  8-BIT FET BUS SWITCH 2.5-V/3.3-V LOW-VOLTAGE HIGH-BANDWIDTH BUS SWITCH
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メーカー  TI [Texas Instruments]
ホームページ  http://www.ti.com
Logo TI - Texas Instruments

SN74CB3Q3245RGYR データシート(HTML) 2 Page - Texas Instruments

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DESCRIPTION/ORDERING INFORMATION (CONTINUED)
GQN PACKAGE
(TOP VIEW)
1
2
3
4
A
B
C
D
E
SN74CB3Q3245
8-BIT FET BUS SWITCH
2.5-V/3.3-V LOW-VOLTAGE HIGH-BANDWIDTH BUS SWITCH
SCDS124B – JULY 2003 – REVISED MARCH 2005
The SN74CB3Q3245 is organized as an 8-bit bus switch with a single output-enable (OE) input. When OE is low,
the bus switch is ON and the A port is connected to the B port, allowing bidirectional data flow between ports.
When OE is high, the bus switch is OFF and a high-impedance state exists between the A and B ports.
This device is fully specified for partial-power-down applications using Ioff. The Ioff circuitry prevents damaging
current backflow through the device when it is powered down. The device has isolation during power off.
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.
ORDERING INFORMATION
TA
PACKAGE(1)
ORDERABLE PART NUMBER
TOP-SIDE MARKING
QFN – RGY
Tape and reel
SN74CB3Q3245RGYR
BU245
SSOP (QSOP) – DBQ
Tape and reel
SN74CB3Q3245DBQR
CB3Q3245
Tube
SN74CB3Q3245PW
–40
°C to 85°C
TSSOP – PW
BU245
Tape and reel
SN74CB3Q3245PWR
TVSOP – DGV
Tape and reel
SN74CB3Q3245DGVR
BU245
VFBGA – GQN
Tape and reel
SN74CB3Q3245GQNR
BU245
(1)
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at
www.ti.com/sc/package.
TERMINAL ASSIGNMENTS(1)
1
2
3
4
A
A1
NC
VCC
OE
B
A3
B2
A2
B1
C
A5
A4
B4
B3
D
A7
B6
A6
B5
E
GND
A8
B8
B7
(1)
NC - No internal connection
FUNCTION TABLE
INPUT
INPUT/OUTPUT
FUNCTION
OE
A
L
B
A port = B port
H
Z
Disconnect
2


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