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NXP PCA9545AD118 4-Channel I2C Switch

The PCA9545A/45B/45C is a versatile 4-channel I2C-bus switch with interrupt logic and reset capabilities. It supports voltage level translation, hot insertion, and power-up reset, making it suitable for complex multi-voltage systems. The device features active LOW interrupt inputs and an active LOW reset input, with up to 4 address pins for system scalability. It provides glitch-free channel switching, low Ron switches, and protections against ESD and latch-up. Its compact packages include HVQFN20, TSSOP20, and SO20, optimized for surface mounting and thermal management.

Authorized Distributors
Source:Newark
Part No:PCA9545AD,118
Stock:496
Inv Date:06-09-2026
Price: Unit price: $2.69
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Source:DigiKey
Part No:PCA9545AD,118
Stock:285
Inv Date:06-09-2026
Price: N/A
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Part No:PCA9545AD,118
Stock:3493
Inv Date:06-10-2026
Price: Unit price: $2.44
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Part No:PCA9545AD,118
Stock:1900
Inv Date:06-10-2026
Price: N/A
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NXP PCA9545AD118 4-Channel I2C Switch Specifications:

  • Support for I2C-bus, SMBus standards operating up to 400 kHz.
  • Voltage supply range from 2.3 V to 5.5 V, Vpp from 2.7 V to 5.5 V.
  • Active LOW interrupt inputs with external pull-ups, one active LOW interrupt output.
  • Support for hot insertion, low standby current, and glitch-free switching.
  • Power-on reset ensures default channel deselection at startup.
  • Pass gates constructed for voltage level translation with maximum Vpp of 5.5 V.
  • Built-in ESD protection exceeding 2000 V HBM, latch-up protection over 100 mA.
  • Package options include HVQFN20, TSSOP20, SO20, optimized for surface mounting.
  • Maximum junction temperature 125°C, operating temperature from -40°C to +85°C.
  • Physical dimensions vary per package, with thermal considerations for HVQFN20.

Buy the Buy NXP PCA9545A Part Number PCA9545AD118 Online

Purchase the NXP PCA9545AD118 4-channel I2C switch online today to upgrade your electronic projects with a reliable, versatile, and easy-to-integrate component. This device supports multi-voltage systems, features interrupt logic, reset capabilities, and voltage level translation, making it ideal for complex system designs. Its compact size in HVQFN20, TSSOP20, or SO20 packages ensures easy surface mounting. With rigorous protections, low Ron, and hot insertion support, it provides an excellent solution for scalable, efficient, and robust I2C-bus multiplexing applications.

Order your NXP PCA9545AD118 4-channel I2C switch today and enhance your system's voltage compatibility and reliability with this compact, high-performance device.

Frequently Asked Questions

Where can I buy NXP PCA9545AD118?

You can click on the BUY or RFQ button to purchase PCA9545AD118 from an authorized NXP distributor.

How do I troubleshoot issues or seek technical support for part PCA9545AD118?

You can download the PCA9545AD118 datasheet or visit the NXP website for support.

Who is the manufacturer of PCA9545AD118?

NXP

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