參數(shù)資料
型號(hào)： SN74CBT3257CPWG4
廠商： TEXAS INSTRUMENTS INC
元件分類： 編、解碼器及復(fù)用、解復(fù)用
英文描述： CBT/FST/QS/5C/B SERIES, QUAD 1 LINE TO 2 LINE MULTIPLEXER AND DEMUX/DECODER, TRUE OUTPUT, PDSO16
封裝： GREEN, PLASTIC, TSSOP-16
文件頁(yè)數(shù)： 12/22頁(yè)
文件大小： 824K
代理商： SN74CBT3257CPWG4
SN74CBT3257C
4BIT 1OF2 FET MULTIPLEXER/DEMULTIPLEXER
5V BUS SWITCH WITH 2V UNDERSHOOT PROTECTION
SCDS137 OCTOBER 2003
2
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
description/ordering information (continued)
The SN74CBT3257C is a high-speed TTL-compatible FET multiplexer/demultiplexer with low ON-state
resistance (ron), allowing for minimal propagation delay. Active Undershoot-Protection Circuitry on the A and
B ports of the SN74CBT3257C provides protection for undershoot up to 2 V by sensing an undershoot event
and ensuring that the switch remains in the proper OFF state.
The SN74CBT3257C is a 4-bit 1-of-2 multiplexer/demultiplexer with a single output-enable (OE) input. The
select (S) input controls the data path of the multiplexer/demultiplexer. When OE is low, the
multiplexer/demultiplexer is enabled and the A port is connected to the B port, allowing bidirectional data flow
between ports. When OE is high, the multiplexer/demultiplexer is disabled 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 feature ensures that
damaging current will not 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.
FUNCTION TABLE
INPUTS
INPUT/OUTPUT
FUNCTION
OE
S1
INPUT/OUTPUT
A
FUNCTION
L
B1
A port = B1 port
L
HB2
A port = B2 port
H
X
Z
Disconnect
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
SN74CBT3257CPWR 功能描述:多路器開關(guān) IC 4-Bit 1-Of-2 FET Mltplxr/Demltplxr RoHS:否 制造商:Texas Instruments 通道數(shù)量:1 開關(guān)數(shù)量:4 開啟電阻（最大值）:7 Ohms 開啟時(shí)間（最大值）: 關(guān)閉時(shí)間（最大值）: 傳播延遲時(shí)間:0.25 ns 工作電源電壓:2.3 V to 3.6 V 工作電源電流: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UQFN-16
SN74CBT3257CPWRE4 功能描述:多路器開關(guān) IC SN74LVCH16T245 RoHS:否 制造商:Texas Instruments 通道數(shù)量:1 開關(guān)數(shù)量:4 開啟電阻（最大值）:7 Ohms 開啟時(shí)間（最大值）: 關(guān)閉時(shí)間（最大值）: 傳播延遲時(shí)間:0.25 ns 工作電源電壓:2.3 V to 3.6 V 工作電源電流: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UQFN-16
SN74CBT3257CPWRG4 功能描述:多路器開關(guān) IC 4B 1 Of 2 FET Multi Demultiplexr RoHS:否 制造商:Texas Instruments 通道數(shù)量:1 開關(guān)數(shù)量:4 開啟電阻（最大值）:7 Ohms 開啟時(shí)間（最大值）: 關(guān)閉時(shí)間（最大值）: 傳播延遲時(shí)間:0.25 ns 工作電源電壓:2.3 V to 3.6 V 工作電源電流: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UQFN-16
SN74CBT3257CRGYR 功能描述:多路器開關(guān) IC 4-Bit 1-Of-2 FET Mltplxr/Demltplxr RoHS:否 制造商:Texas Instruments 通道數(shù)量:1 開關(guān)數(shù)量:4 開啟電阻（最大值）:7 Ohms 開啟時(shí)間（最大值）: 關(guān)閉時(shí)間（最大值）: 傳播延遲時(shí)間:0.25 ns 工作電源電壓:2.3 V to 3.6 V 工作電源電流: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UQFN-16
SN74CBT3257CRGYRG4 功能描述:多路器開關(guān) IC 16-Bit Reg Trnscvr With 3-State Outputs RoHS:否 制造商:Texas Instruments 通道數(shù)量:1 開關(guān)數(shù)量:4 開啟電阻（最大值）:7 Ohms 開啟時(shí)間（最大值）: 關(guān)閉時(shí)間（最大值）: 傳播延遲時(shí)間:0.25 ns 工作電源電壓:2.3 V to 3.6 V 工作電源電流: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UQFN-16
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