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參數資料
| 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中斷邏輯開關和復位 |
| 文件頁數： | 5/27頁 |
| 文件大小： | 155K |
| 代理商： | PCA9545A |
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9397 750 14311
Koninklijke Philips Electronics N.V. 2005. All rights reserved.
Product data sheet
Rev. 03 — 3 March 2005
5 of 27
Philips Semiconductors
PCA9545A
4-channel I
2
C switch with interrupt logic and reset
[1]
HVQFN package die supply ground is connected to both the V
SS
pin and the exposed center pad. The V
SS
pin must be connected to supply ground for proper device operation. For enhanced thermal, electrical, and
board-level performance, the exposed pad needs to be soldered to the board using a corresponding
thermal pad on the board, and for proper heat conduction through the board thermal vias need to be
incorporated in the PCB in the thermal pad region.
7.
Functional description
Refer to
Figure 1 “Block diagram of PCA9545A” on page 3
.
7.1 Device address
Following a START condition, the bus master must output the address of the slave it is
accessing. The address of the PCA9545A is shown in
Figure 5
. To conserve power, no
internal pull-up resistors are incorporated on the hardware selectable address pins and
they must be pulled HIGH or LOW.
The last bit of the slave address defines the operation to be performed. When set to
logic 1, a read is selected while a logic 0 selects a write operation.
SC1
V
SS
INT2
SD2
SC2
INT3
SD3
SC3
INT
SCL
SDA
V
DD
9
10
11
12
13
14
15
16
17
18
19
20
7
8
[1]
9
10
11
12
13
14
15
16
17
18
serial clock 1
supply ground
active LOW interrupt input 2
serial data 2
serial clock 2
active LOW interrupt input 3
serial data 3
serial clock 3
active LOW interrupt output
serial clock line
serial data line
supply voltage
Table 3:
Symbol
Pin description
…continued
Pin
SO, TSSOP
Description
HVQFN
Fig 5.
Slave address
002aab169
1
1
1
0
0
A1
A0 R/W
fixed
hardware
selectable
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相關代理商/技術參數 |
參數描述 |
|---|---|
| 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 IC I2C SWITCH 4CH 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 |
| PCA9545ABS-T | 功能描述:多路器開關 IC I2C SWITCH 4CH 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 |
| PCA9545AD | 功能描述:多路器開關 IC 4-CH I2C SWITCH W/INT+RESET 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 |
| PCA9545AD,112 | 功能描述:多路器開關 IC 4-CH I2C SWITCH 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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