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Product Variant Information section
Product Specification Section
Pricing Section

Stock: 1,563

On Order:Order inventroy details 1,788
Factory Stock:Factory Stock: 0
Factory Lead Time: 7 Weeks
Minimum Order: 1
Multiple Of: 1
Quantity Web Price
1 $1.56
40 $1.13
125 $1.03
400 $0.925
1,250+ $0.84


Attributes Table
Interface Circuit Type I2C Bus
No of Channels 4
Clock Frequency-Max 400kHz
Supply Voltage-Nom 2.3V to 3.6V
Supply Current 10µA
Features and Applications

The PCA9545APW,112 is aprt of PCA9545A Series with a quad bidirectional translating switch controlled via the I2C-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, Available in a package of TSSOP-20.


  • 1-of-4 bidirectional translating switches
  • I2C-bus interface logic; compatible with SMBus standards
  • 4 active LOW interrupt inputs
  • Active LOW interrupt output and Active LOW reset input
  • 2 address pins allowing up to 4 devices on the I2C-bus
  • Channel selection via I2C-bus, in any combination
  • Power-up with all switch channels deselected
  • Allows voltage level translation between 1.8 V, 2.5 V, 3.3 V and 5 V buses
  • No glitch on power-up
  • Low standby current
  • 5 V tolerant Inputs
  • Alternate address versions A, B and C allow up to a total of 12 devices on the bus for
    larger systems or to resolve address conflicts
  • ESD protection exceeds 2000 V HBM per JESD22-A114, 200 V MM per JESD22-A115, and 1000 V CDM Per JESD22-C101
  • Latch-up protection exceeds 100 mA per JESD78
  • Three packages offered: SO20, TSSOP20, and HVQFN20