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參數資料
| 型號： | PCA9546A |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | 4-channel I2C switch with reset |
| 中文描述： | 4通道的I2C開關與復位 |
| 文件頁數： | 1/25頁 |
| 文件大小： | 144K |
| 代理商： | PCA9546A |
1.
General description
The PCA9546A 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.
An active LOW reset input allows the PCA9546A 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 (POR) 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 PCA9546A. 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
Active LOW reset input
I
3 address pins allowing up to 8 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 testing is done to JEDEC Standard JESD78 which exceeds 100 mA
I
Three packages offered: SO16, TSSOP16, and HVQFN16
PCA9546A
4-channel I
2
C switch with reset
Rev. 03 — 6 April 2005
Product data sheet
相關PDF資料 |
PDF描述 |
|---|---|
| PCA9546 | 4-channel I2C switch with reset |
| PCA9546D | 4-channel I2C switch with reset |
| PCA9546PW | 4-channel I2C switch with reset |
| PCA9549 | Octal bus switch with individually I2C-bus controlled enables |
| PCA9555N | 16-bit I2C and SMBus I/O port with interrupt |
相關代理商/技術參數 |
參數描述 |
|---|---|
| PCA9546A_1 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:4-CHANNEL I2C AND SMBus SWITCH WITH RESET FUNCTION |
| PCA9546A_2 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:4-CHANNEL I2C AND SMBus SWITCH WITH RESET FUNCTION |
| PCA9546A_3 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:4-CHANNEL I2C AND SMBus SWITCH WITH RESET FUNCTION |
| PCA9546ABS | 制造商:NXP Semiconductors 功能描述: |
| PCA9546ABS,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 |
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