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PI4MSD5V9546A

4-Channel I2C/SMBus Bus Switch with RESET

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Product Description

The PI4MSD5V9546A is a quad bidirectional translating switch controlled via the I2C/SMBus. 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 PI4MSD5V-9546A 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/SMBus 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 VCC pin can be used to limit the maximum high voltage which is passed by the PI4MSD5V9546A. This allows the use of different bus voltages on each pair, so that1.2V, 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-4 bidirectional translating multiplexer
  • I2C-bus interface logic; compatible with SMBus standards
  • Operating power supply voltage range of 1.65 V to 5.5 V
  • 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
  • Channel selection via I2C/SMBus
  • Power-up with all multiplexer channels deselected
  • 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: SOIC-16W,TSSOP-16L, TQFN4*4-16ZY



Product Specifications

Product Parameters

Ambient or Junction Temperature (°C) -40 to 85
Analog or Digital? Digital
Voltage 1.65V/5.5V
Single Ended Channels 4
Signal Type Single Ended
Configuration Switch, 4-channel, 2:1
RailToRail 0
HotInsertion 1

Technical Documents

Design tool model software

Recommended Soldering Techniques

TN1.pdf

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

Request Documents
Orderable Part Number Status Package Environmental Compliance Packing Buy from Distributor /
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Qty. Carrier
PI4MSD5V9546ALEX Active TSSOP-16 GREEN 2500 T&R

PI4MSD5V9546ALEX

Authorized Distributor Quantity Inventory Date Countries/Regions Buy Online
Farnell, An Avnet Company 3820 11/26/2022 England Buy Now
Digi-Key Electronics 7 11/25/2022 Europe, Asia, North America Buy Now
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PI4MSD5V9546AZYEX Active W-QFN4040-16 GREEN 5000 T&R

PI4MSD5V9546AZYEX

Authorized Distributor Quantity Inventory Date Countries/Regions Buy Online
Mouser Electronics Inc. 4750 11/26/2022 South America, North America, Asia, Europe, Middle East Buy Now
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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

Product Change Notices (PCNs)

A PCN may only apply to specific orderable part numbers in this datasheet. Please refer to the corresponding PCN to see the exact orderable part number(s) affected.

PCN # Issue Date Implementation Date Subject
PCN-2493 2020-12-28 2021-03-28 Qualified Additional A/T Sites and Bill of Materials (BOM)