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NXP PCA8574D518 8-bit I/O expander

The PCA8574D518 is an 8-bit remote I/O expander that communicates via I2C-bus, supporting fast-mode at 400 kHz. It features quasi-bidirectional ports, which can be configured as inputs to monitor external signals or as outputs to drive indicators such as LEDs, with 25 mA sink capability. The device operates from 2.3 V to 5.5 V, has an active LOW interrupt output, and internal Power-On Reset (POR) sets all ports to inputs. Suitable for LED displays, industrial control, medical devices, and mobile applications, it enables efficient and flexible I/O expansion in complex systems.

Authorized Distributors
Part No:PCA8574D,518
Stock:0
Inv Date:06-11-2026
Price: Unit price: $1.49
Buy/RFQ:
Part No:PCA8574D,518
Stock:0
Inv Date:06-10-2026
Price: Unit price: $0.765
Buy/RFQ:

NXP PCA8574D518 8-bit I/O expander Specifications:

  • Operating Voltage: 2.3 V to 5.5 V
  • I2C-bus interface: Fast-mode (400 kHz)
  • Ports: 8 quasi-bidirectional I/O pins
  • Sink Current: 25 mA per port pin, total 200 mA
  • Interrupt Output: Active LOW open-drain
  • Power-On Reset: Yes, initializes ports as inputs with weak pull-up
  • Supply Current: 200-500 nA (operating), 10-45 nA (standby)
  • Temperature Range: -40°C to +85°C
  • Package: SO16, TSSOP16, SSOP20 options
  • Compliance: ESD protection >2000 V HBM, JESD78 latch-up testing
  • Dimensions: SO16 package width 7.5mm, TSSOP16 4.4mm, SSOP20 4.4mm
  • Certification: UL, CSA

Buy the NXP PCA8574D518 – Reliable I/O Expander for Industrial Applications

Enhance your system with the PCA8574D518 8-bit I/O expander, supporting I2C communication, configurable ports, and interrupt capabilities. Ideal for LED displays, industrial control, medical equipment, and mobile devices, this device ensures reliable data transfer, power-efficient operation from 2.3 V to 5.5 V, and flexible configuration. With high surge protection, multiple package options, and minimal standby current, it provides seamless expansion for complex embedded systems. Order now and boost your project’s efficiency and performance.

Buy NXP PCA8574D518 now and experience unmatched reliability and performance in industrial and medical control systems.

Frequently Asked Questions

Where can I buy NXP PCA8574D518?

You can click on the BUY or RFQ button to purchase PCA8574D518 from an authorized NXP distributor.

How do I troubleshoot issues or seek technical support for part PCA8574D518?

You can download the PCA8574D518 datasheet or visit the NXP website for support.

Who is the manufacturer of PCA8574D518?

NXP

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