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參數(shù)資料
| 型號(hào)： | PCA9548 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | 8-channel I2C switch with reset |
| 中文描述： | 8通道的I2C與復(fù)位開關(guān) |
| 文件頁(yè)數(shù)： | 6/16頁(yè) |
| 文件大小： | 125K |
| 代理商： | PCA9548 |
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Philips Semiconductors
Product data sheet
PCA9548
8-channel I
2
C switch with reset
2004 Sep 30
6
VOLTAGE TRANSLATION
The pass gate transistors of the PCA9548 are constructed such that
the V
DD
voltage can be used to limit the maximum voltage that will
be passed from one I
2
C-bus to another.
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
V
pass
vs. V
DD
2.5
3.0
3.5
4.0
4.5
5.0
5.5
V
pass
V
DD
MINIMUM
TYPICAL
MAXIMUM
SW00820
2.0
Figure 5. V
pass
voltage vs. V
DD
Figure 5 shows the voltage characteristics of the pass gate
transistors (note that the PCA9548 is only tested at the points
specified in the DC Characteristics section of this datasheet). In
order for the PCA9548 to act as a voltage translator, the V
pass
voltage should be equal to, or lower than the lowest bus voltage. For
example, if the main bus was running at 5 V, and the downstream
buses were 3.3 V and 2.7 V, then V
pass
should be equal to or below
2.7 V to effectively clamp the downstream bus voltages. Looking at
Figure 5, we see that V
pass
(max.) will be at 2.7 V when the
PCA9548 supply voltage is 3.5 V or lower so the PCA9548 supply
voltage could be set to 3.3 V. Pull-up resistors can then be used to
bring the bus voltages to their appropriate levels (see Figure 12).
More Information can be found in Application Note AN262 PCA954X
family of I
2
C/SMBus multiplexers and switches.
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PDF描述 |
|---|---|
| PCA9548D | 8-channel I2C switch with reset |
| PCA9548PW | 8-channel I2C switch with reset |
| PCA9550 | 2-bit I2C LED driver with programmable blink rates |
| PCA9551 | 8-bit I2C LED driver with programmable blink rates |
| PCA9552 | GT 10C 10#16 SKT RECP BOX RM |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PCA9548A | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:8-channel I2C-bus switch with reset |
| PCA9548ABS | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:8-channel I2C-bus switch with reset |
| PCA9548ABS,118 | 功能描述:多路器開關(guān) IC 4CH I2C SWTCH W/REST 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 |
| PCA9548ABS,118-CUT TAPE | 制造商:NXP 功能描述:PCA9548 Series 8-Channel I2C-Bus Translating Switch w/ Reset - HVQFN - 24 |
| PCA9548ABSHP | 功能描述:多路器開關(guān) IC 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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