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PI4MSD5V9548A

8-Channel I2C/SMBus Bus Switch with RESET

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Product Description

The PI4MSD5V9548A is an octal bidirectional translating switch 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. An active LOW reset input allows the PI4MSD5V9548A to recover from a situation where one of the downstream buses is stuck in a LOW state. Pulling the RESET pin LOW resets the I2C bus state machine and causes all the channels to be deselected as does the internal Power-on reset function. The pass gates of the switches are constructed such that the VCC pin can be used to limit the maximum high voltage which will be passed by the PI4MSD5V9548A. This allows the use of different bus voltages on each pair, so that 1.2V,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.

Features

  • 1-of-8 bidirectional translating switch
  • I2C-bus interface logic
  • Operating power supply voltage from 1.65V to 5.5V
  • Allows voltage level translation between 1.2V, 1.8V,2.5 V, 3.3 V and 5 V buses
  • Low standby current
  • Low Ron switches
  • Active LOW reset input
  • Channel selection via I2C bus
  • Power-up with all switches channels deselected
  • Capacitance isolation when channel disabled
  • No glitch on power-up
  • Supports hot insertion
  • 5 V tolerant inputs
  • 0 Hz to 400 kHz clock frequency
  • ESD protection exceeds 8000 V HBM per JESD22-A114, and 1000 V CDM per JESD22-C101
  • Latch-up testing is done to JEDEC Standard JESD78 which exceeds 100 mA
  • Packages offered: TSSOP-24L,TQFN-24ZD

Product Specifications

Product Parameters

Ambient or Junction Temperature (°C) -40 to 85
Analog or Digital? Digital
Voltage 1.65V/5.5V
Single Ended Channels 8
Signal Type Single Ended
Configuration Switch, 8-channel, 8:1
RailToRail 0
HotInsertion 1

Technical Documents

Recommended Soldering Techniques

TN1.pdf

Additional Technical Documents are available upon request:
Application information, Evaluation board, and Other technical documents

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Orderable Part Number Status Package Environmental Compliance Packing Buy from Distributor /
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Qty. Carrier
PI4MSD5V9548ALE Active TSSOP-24 GREEN 62 TUBE Contact Sales Request Sample
PI4MSD5V9548ALEX Active TSSOP-24 TPGP 3000 T&R Contact Sales Request Sample
PI4MSD5V9548AZDEX Active V-QFN4040-24 TPGP 3500 T&R Contact Sales Request Sample

Environmental Compliance Legend:
LFF: Pb-Free Finish and RoHS 5/6
TLFP: Totally Pb-Free Product and RoHS 6/6
LFGP: Pb-free Finish and Green Product, RoHS 5/6 and Halogen Free
TPGP: Totally Pb-Free and Green Product, RoHS 6/6 and Halogen Free
GREEN: Halogen-free and RoHS compliant
RoHS: RoHS compliant but NOT halogen-free