參數(shù)資料
型號(hào)： 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(yè)數(shù)： 7/27頁(yè)
文件大?。?/td> 155K
代理商： PCA9545A
9397 750 14311
Koninklijke Philips Electronics N.V. 2005. All rights reserved.
Product data sheet
Rev. 03 — 3 March 2005
7 of 27
Philips Semiconductors
PCA9545A
4-channel I
2
C switch with interrupt logic and reset
7.2.2
Interrupt handling
The PCA9545A provides 4 interrupt inputs, one for each channel, and one open-drain
interrupt output. When an interrupt is generated by any device, it will be detected by the
PCA9545A and the interrupt output will be driven LOW. The channel does not need to be
active for detection of the interrupt. A bit is also set in the control register.
Bit 4 through bit 7 of the control register corresponds to channel 0 through channel 3 of
the PCA9545A, respectively. Therefore, if an interrupt is generated by any device
connected to channel 1, the state of the interrupt inputs is loaded into the control register
when a read is accomplished. Likewise, an interrupt on any device connected to
channel 0 would cause bit 4 of the control register to be set on the read. The master can
then address the PCA9545A and read the contents of the control register to determine
which channel contains the device generating the interrupt. The master can then
reconfigure the PCA9545A to select this channel, and locate the device generating the
interrupt and clear it.
It should be noted that more than one device can provide an interrupt on a channel, so it is
up to the master to ensure that all devices on a channel are interrogated for an interrupt.
The interrupt inputs may be used as general purpose inputs if the interrupt function is not
required.
If unused, interrupt input(s) must be connected to V
DD
through a pull-up resistor.
Remark:
Several interrupts can be active at the same time. Example: INT3 = 0, INT2 = 1,
INT1 = 1, INT0 = 0, means that there is no interrupt on channel 0 and channel 3, and
there is interrupt on channel 1 and channel 2.
7.3 RESET input
The RESET input is an active LOW signal which may be used to recover from a bus fault
condition. By asserting this signal LOW for a minimum of t
WL
, the PCA9545A will reset its
registers and I
2
C-bus state machine and will deselect all channels. The RESET input must
be connected to V
DD
through a pull-up resistor.
Table 5:
INT3
Control register: Read—interrupt
INT2
INT1
INT0
0
1
0
X
1
0
X
X
1
B3
B2
B1
B0
Command
no interrupt on channel 0
interrupt on channel 0
no interrupt on channel 1
interrupt on channel 1
no interrupt on channel 2
interrupt on channel 2
no interrupt on channel 3
interrupt on channel 3
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
0
1
X
X
X
X
X
X
X
相關(guān)PDF資料
PDF描述
PCA9545 4-channel I2C switch with interrupt logic and reset
PCA9545D 4-channel I2C switch with interrupt logic and reset
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(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
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(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
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(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
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(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
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*