參數(shù)資料
型號： PCA9545A
廠商： NXP Semiconductors N.V.
英文描述： 4-channel I2C switch with interrupt logic and reset
中文描述： 4通道的I2C中斷邏輯開關(guān)和復(fù)位
文件頁數(shù)： 1/27頁
文件大?。?/td> 155K
代理商： PCA9545A
1.
General description
The PCA9545A is a quad bi-directional translating switch controlled via the I
2
C-bus. The
SCL/SDA upstream pair fans out to four 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. Four interrupt inputs, INT0 to INT3, one for
each of the downstream pairs, are provided. One interrupt output, INT, acts as an AND of
the four interrupt inputs.
An active LOW reset input allows the PCA9545A 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
I
2
C-bus 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 PCA9545A. This allows the use of
different bus voltages on each pair, so that 1.8 V or 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.
2.
Features
I
1-of-4 bi-directional translating switches
I
I
2
C-bus interface logic; compatible with SMBus standards
I
4 active LOW interrupt inputs
I
Active LOW interrupt output
I
Active LOW reset input
I
2 address pins allowing up to 4 devices on the I
2
C-bus
I
Channel selection via I
2
C-bus, in any combination
I
Power-up with all switch channels deselected
I
Low R
on
switches
I
Allows voltage level translation between 1.8 V, 2.5 V, 3.3 V and 5 V buses
I
No glitch on power-up
I
Supports hot insertion
I
Low stand-by current
I
Operating power supply voltage range of 2.3 V to 5.5 V
I
5 V tolerant Inputs
I
0 kHz to 400 kHz clock frequency
I
ESD protection exceeds 2000 V HBM per JESD22-A114, 200 V MM per
JESD22-A115, and 1000 V CDM per JESD22-C101
I
Latch-up protection exceeds 100 mA per JESD78
PCA9545A
4-channel I
2
C switch with interrupt logic and reset
Rev. 03 — 3 March 2005
Product data sheet
相關(guān)PDF資料
PDF描述
PCA9545 4-channel I2C switch with interrupt logic and reset
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PCA9545PW 4-channel I2C switch with interrupt logic and reset
PCA9548A 8-channel I2C switch with reset
PCA9548 8-channel I2C switch with reset
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
PCA9545ABS 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:4-channel I2C-bus switch with interrupt logic and reset
PCA9545ABS,118 功能描述:多路器開關(guān) IC I2C SWITCH 4CH 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 開啟時間（最大值）: 關(guān)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(fēng)格:SMD/SMT 封裝 / 箱體:UQFN-16
PCA9545ABS-T 功能描述:多路器開關(guān) IC I2C SWITCH 4CH 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 開啟時間（最大值）: 關(guān)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(fēng)格:SMD/SMT 封裝 / 箱體:UQFN-16
PCA9545AD 功能描述:多路器開關(guān) IC 4-CH I2C SWITCH W/INT+RESET 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 開啟時間（最大值）: 關(guān)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(fēng)格:SMD/SMT 封裝 / 箱體:UQFN-16
PCA9545AD,112 功能描述:多路器開關(guān) IC 4-CH I2C SWITCH 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 開啟時間（最大值）: 關(guān)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(fēng)格:SMD/SMT 封裝 / 箱體:UQFN-16
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