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參數資料
| 型號： | 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與復位開關 |
| 文件頁數： | 2/16頁 |
| 文件大小： | 125K |
| 代理商： | PCA9548 |
Philips Semiconductors
Product data sheet
PCA9548
8-channel I
2
C switch with reset
2
2004 Sep 30
FEATURES
1-of-8 bi-directional translating switches
I
2
C interface logic; compatible with SMBus standards
Active LOW Reset Input
3 address pins allowing up to 8 devices on the I
2
C-bus
Channel selection via I
2
C-bus, in any combination
Power-up with all switch channels deselected
Low Rds
ON
switches
Allows voltage level translation between 1.8 V, 2.5 V, 3.3 V and
5 V buses
No glitch on power-up
Supports hot insertion
Low stand-by current
Operating power supply voltage range of 2.3 V to 5.5 V
5 V tolerant Inputs
0 kHz to 400 kHz clock frequency
ESD protection exceeds 2000 V HBM per JESD22-A114,
150 V MM per JESD22-A115 and 1000 V per JESD22-C101
Latchup testing is done to JESDEC Standard JESD78 which
exceeds 100 mA
Packages offered: SO24, TSSOP24
DESCRIPTION
The PCA9548 is a octal bi-directional translating switch controlled
by the I
2
C-bus. The SCL/SDA upstream pair fans out to eight
downstream pairs, or channels. Any individual SCx/SDx channel or
combination of channels can be selected, determined by the
contents of the programmable Control Register.
An active-LOW reset input allows the PCA9548 to recover from a
situation where one of the downstream I
2
C-buses is stuck in a LOW
state. Pulling the RESET pin LOW resets the I2C state machine and
causes all the channels to be deselected as does the internal power
on reset function.
The pass gates of the switches are constructed such that the V
DD
pin can be used to limit the maximum high voltage which will be
passed by the PCA9548. This allows the use of different bus
voltages on each pair, so that 1.8 V, 2.5 V, or 3.3 V parts can
communicate with 5 V parts without any additional protection.
External pull-up resistors pull the bus up to the desired voltage level
for each channel. All I/O pins are 5 V tolerant.
ORDERING INFORMATION
PACKAGES
TEMPERATURE RANGE
–40
°
C to +85
°
C
–40
°
C to +85
°
C
ORDER CODE
DRAWING NUMBER
24-Pin Plastic SO
PCA9548D
SOT137-1
24-Pin Plastic TSSOP
Standard packing quantities and other packaging data are available at www.standardproducts.philips.com/packaging.
PCA9548PW
SOT355-1
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| PCA9548D | 8-channel I2C switch with reset |
| PCA9548PW | 8-channel I2C switch with reset |
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相關代理商/技術參數 |
參數描述 |
|---|---|
| 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 IC 4CH I2C SWTCH W/REST RoHS:否 制造商:Texas Instruments 通道數量:1 開關數量:4 開啟電阻（最大值）:7 Ohms 開啟時間（最大值）: 關閉時間（最大值）: 傳播延遲時間: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 IC RoHS:否 制造商:Texas Instruments 通道數量:1 開關數量:4 開啟電阻（最大值）:7 Ohms 開啟時間（最大值）: 關閉時間（最大值）: 傳播延遲時間: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 安裝風格:SMD/SMT 封裝 / 箱體:UQFN-16 |
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