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參數(shù)資料
| 型號： | SN74CB3Q6800PWE4 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 總線收發(fā)器 |
| 英文描述： | CB3Q/3VH/3C/2B SERIES, 10-BIT DRIVER, TRUE OUTPUT, PDSO24 |
| 封裝： | GREEN, PLASTIC, TSSOP-24 |
| 文件頁數(shù)： | 9/16頁 |
| 文件大?。?/td> | 451K |
| 代理商： | SN74CB3Q6800PWE4 |
www.ti.com
DESCRIPTION/ORDERING INFORMATION
SN74CB3Q6800
10-BIT FET BUS SWITCH WITH PRECHARGED OUTPUTS
2.5-V/3.3-V LOW-VOLTAGE HIGH-BANDWIDTH BUS SWITCH
SCDS142A – OCTOBER 2003 – REVISED MARCH 2005
The SN74CB3Q6800 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 SN74CB3Q6800 provides an optimized
interface solution ideally suited for broadband communications, networking, and data-intensive computing
systems.
The SN74CB3Q6800 is a 10-bit bus switch with a single output-enable (ON) input. When ON is low, the 10-bit
bus switch is ON and the A port is connected to the B port, allowing bidirectional data flow between ports. When
ON is high, the 10-bit bus switch is OFF and a high-impedance state exists between the A and B ports. The B
port is precharged to bias voltage (BIASV) through the equivalent of a 10-k
resistor when ON is high, or if the
device is powered down (VCC = 0 V).
During insertion (or removal) of a card into (or from) an active bus, the card's output voltage may be close to
GND. When the connector pins make contact, the card's parasitic capacitance tries to force the bus signal to
GND, creating a possible glitch on the active bus. This glitching effect can be reduced by using a bus switch with
precharged bias voltage (BIASV) of the bus switch equal to the input threshold voltage level of the receivers on
the active bus. This method ensures that any glitch produced by insertion (or removal) of the card does not cross
the input threshold region of the receivers on the active bus, minimizing the effects of live-insertion noise.
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, ON 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
SSOP (QSOP) – DBQ
Tape and reel
SN74CB3Q6800DBQR
CB3Q6800
Tube
SN74CB3Q6800PW
–40
°C to 85°C
TSSOP – PW
BY800
Tape and reel
SN74CB3Q6800PWR
TVSOP – DGV
Tape and reel
SN74CB3Q6800DGVR
BY800
(1)
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at
www.ti.com/sc/package.
FUNCTION TABLE
INPUT
INPUT/OUTPUT
FUNCTION
ON
A
L
B
A port = B port
Disconnect
H
Z
B port = BIASV
2
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| SN74CB3Q6800PWG4 | 功能描述:數(shù)字總線開關 IC 10B FETBus 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 |
| SN74CB3Q6800PWR | 功能描述:數(shù)字總線開關 IC 10-Bit FET 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 |
| SN74CB3Q6800PWRE4 | 功能描述:數(shù)字總線開關 IC 25-Bit Configurable 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 |
| SN74CB3Q6800PWRG4 | 功能描述:數(shù)字總線開關 IC 10B FETBus 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 |
| SN74CB3T16210DGGR | 功能描述:數(shù)字總線開關 IC 20B FET 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 |
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