PCA9548A - 具有复位功能的 8 通道 I2C 开关

PCA9548A是TI德州仪器公司的一款I2C多路复用器、开关产品，PCA9548A是具有复位功能的 8 通道 I2C 开关，本站介绍了PCA9548A的封装应用图解、特点和优点、功能等，并给出了与PCA9548A相关的TI元器件型号供参考。

PCA9548A - 具有复位功能的 8 通道 I2C 开关 - I2C多路复用器、开关 - I2C - 德州仪器

产品特性

1-of-8 Bidirectional Translating Switches
I2C Bus and SMBus Compatible
Active-Low Reset Input
Three Hardware Address Pins for Use of up to Eight PCA9548A Devices on the I2C Bus
Channel Selection Via I2C Bus
Power-Up with All Switch Channels Deselected
Low RON 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 Standby Current
Operating Power-Supply Voltage Range of 2.3 Vto5.5 V
5-V Tolerant Inputs
0 to 400-kHz Clock Frequency
Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II
ESD Protection Exceeds JESD 22
- 2000-V Human-Body Model (A114-A)
- 200-V Machine Model (A115-A)
- 1000-V Charged-Device Model (C101)

产品应用

Servers
Routers (Telecom Switching Equipment)
Factory Automation
Products With I2C Slave Address Conflicts (e.g. Multiple, Identical Temp Sensors)

产品说明

The PCA9548A has eight bidirectional translating switches that can be controlled via the I2C 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.

The system master can reset the PCA9548A in the event of a timeout or other improper operation by asserting a low in the RESET input. Similarly, the power-on reset deselects all channels and initializes the I2C/SMBus state machine. Asserting RESET causes the same reset/initialization to occur without powering down the part.

产品器件信息

DEVICE NAME	PACKAGE	BODY SIZE (NOM)
PCA9548A	TSSOP (24)	7.80 mm × 4.40 mm
PCA9548A	VQFN (24)	4.00 mm × 4.00 mm

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