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Details for TCA9548ARGER by Texas Instruments
Electronic & Electrical Components > Semiconductors - ICs > Driver & Interface ICs
I2C SWITCH W/ RESET 8-CH VQFN-24
TCA9548ARGER image

TCA9548ARGER by Texas Instruments

I2C SWITCH W/ RESET 8-CH VQFN-24
Features
0- to 400-kHz Clock Frequency
1-to-8 Bidirectional Translating Switches
5-V Tolerant Inputs
Active-Low Reset Input
Allows Voltage-Level Translation Between 1.8-V, 2.5-V, 3.3-V, and 5-V Buses
Channel Selection Through an I2 C Bus, In Any Combination
ESD Protection Exceeds JESD 22
I2 C Bus and SMBus Compatible
Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II
Low RON Switches
Low Standby Current
No Glitch on Power Up
Operating Power-Supply Voltage Range of 1.65 V to 5.5 V
Power Up With All Switch Channels Deselected
Supports Hot Insertion
Three Address Pins, Allowing up to Eight TCA9548A Devices on the I2 C Bus
Part Information
TCA9548ARGER image
RoHS Compliant
Description
The TCA9548A device has eight bidirectional translating switches that can be controlled through the I2C bus. The SCL/SDA upstream pair fans out to eight downstream pairs, or channels. Any individual SCn/SDn channel or combination of channels can be selected, determined by the contents of the programmable control register. These downstream channels can be used to resolve I2C slave address conflicts. For example, if eight identical digital temperature sensors are needed in the application, one sensor can be connected at each channel: 0-7. The system master can reset the TCA9548A in the event of a time-out 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 and initialization to occur without powering down the part. This allows recovery should one of the downstream I2C buses get stuck in a low state. The pass gates of the switches are constructed so that the VCC pin can be used to limit the maximum high voltage, which is passed by the TCA9548A. Limiting the maximum high voltage allows the use of different bus voltages on each pair, so that 1.8-V, 2.5V or 3.3-V parts can communicate with 5-V parts, without any additional protection. External pullup resistors pull the bus up to the desired voltage level for each channel. All I/O pins are 5-V tolerant.
Specifications
IC Interface Type:
I2C SMBus
Interface Applications:
Factory Automation Products with I2C Slave Address Conflicts Routers Servers
Supply Voltage Min:
1.65V
Supply Voltage Max:
5.5V
Interface Case Style:
VQFN
No. of Pins:
24Pins
Operating Temperature Min:
-40°C
Operating Temperature Max:
85°C
Product Range:
-
Automotive Qualification Standard:
-
MSL:
MSL 1 - Unlimited
SVHC:
No SVHC (27-Jun-2018)
RoHS Phthalates Compliant:
Yes
Alternate Descriptions
I2C SWITCH W/ RESET, 8-CH, VQFN-24; IC Interface Type:I2C, SMBus; Interface Applications:Factory Automation, Products with I2C Slave Address Conflicts, Routers, Servers; Supply Voltage Min:1.65V; Supply Voltage Max:5.5V; Interface RoHS Compliant: Yes Newark Electronics
Low Voltage I2C Switch 8-CH 24-Pin VQFN T/R Avnet America
Low Voltage I2C Switch 8-CH 24-Pin VQFN T/R Avnet Europe