參數(shù)資料
型號： SN74CB3Q3345PWR
廠商： TEXAS INSTRUMENTS INC
元件分類： 總線收發(fā)器
英文描述： CB3Q/3VH/3C/2B SERIES, 8-BIT DRIVER, TRUE OUTPUT, PDSO20
封裝： GREEN, PLASTIC, TSSOP-20
文件頁數(shù)： 11/18頁
文件大?。?/td> 652K
代理商： SN74CB3Q3345PWR
www.ti.com
DESCRIPTION/ORDERING INFORMATION
A1
A8
OE
B1
B8
OE
2
9
1
19
18
11
SW
SN74CB3Q3345
8-BIT FET BUS SWITCH
2.5-V/3.3-V LOW-VOLTAGE HIGH-BANDWIDTH BUS SWITCH
SCDS144B – OCTOBER 2003 – REVISED MARCH 2005
The SN74CB3Q3345 is a high-bandwidth FET bus switch utilizing a charge pump to elevate the gate voltage of
the pass transistor, providing a low and flat ON-state resistance (ron). The low and flat ON-state resistance allows
for minimal propagation delay and supports rail-to-rail switching on the data input/output (I/O) ports. The device
also features low data I/O capacitance to minimize capacitive loading and signal distortion on the data bus.
Specifically designed to support high-bandwidth applications, the SN74CB3Q3345 provides an optimized
interface solution ideally suited for broadband communications, networking, and data-intensive computing
systems.
The SN74CB3Q3384A is organized as an 8-bit bus switch with two output-enable (OE, OE) inputs. When OE is
high or 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 low and 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 and OE should be tied to GND through a pulldown resistor; the minimum value of the resistor is
determined by the current-sinking/current-sourcing capability of the driver.
ORDERING INFORMATION
TA
PACKAGE(1)
ORDERABLE PART NUMBER
TOP-SIDE MARKING
QFN – RGY
Tape and reel
SN74CB3Q3345RGYR
BU345
SSOP (QSOP) – DBQ
Tape and reel
SN74CB3Q3345DBQR
CB3Q3345
–40°C to 85°C
Tube
SN74CB3Q3345PW
TSSOP – PW
BU345
Tape and reel
SN74CB3Q3345PWR
TVSOP – DGV
Tape and reel
SN74CB3Q3345DGVR
BU345
(1)
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at
www.ti.com/sc/package.
FUNCTION TABLE
INPUTS
INPUT/OUTPUT
FUNCTION
A
OE
H
X
B
A port = B port
X
L
B
A port = B port
L
H
Z
Disconnect
LOGIC DIAGRAM (POSITIVE LOGIC)
2
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相關代理商/技術參數(shù)
參數(shù)描述
SN74CB3Q3345PWRE4 功能描述:數(shù)字總線開關 IC 26-Bit Registered Buffer RoHS:否 制造商:Texas Instruments 開關數(shù)量:24 傳播延遲時間:0.25 ns 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:TSSOP-56 封裝:Reel
SN74CB3Q3345PWRG4 功能描述:數(shù)字總線開關 IC 8B FET 2.5V 3.3V LO VLTG HI RoHS:否 制造商:Texas Instruments 開關數(shù)量:24 傳播延遲時間:0.25 ns 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:TSSOP-56 封裝:Reel
SN74CB3Q3345RGYR 功能描述:數(shù)字總線開關 IC Lo-Vltg Hi-Bandwidth Bus Switch RoHS:否 制造商:Texas Instruments 開關數(shù)量:24 傳播延遲時間:0.25 ns 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:TSSOP-56 封裝:Reel
SN74CB3Q3384ADBQR 功能描述:數(shù)字總線開關 IC 24-48-Bit Registered Buffer RoHS:否 制造商:Texas Instruments 開關數(shù)量:24 傳播延遲時間:0.25 ns 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:TSSOP-56 封裝:Reel
SN74CB3Q3384ADGVR 功能描述:數(shù)字總線開關 IC 13-26-Bit Registered Buffer RoHS:否 制造商:Texas Instruments 開關數(shù)量:24 傳播延遲時間:0.25 ns 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:TSSOP-56 封裝:Reel
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