UART to I²C-Bus Bridge


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Block Diagram

Block diagram: SC18IM704PW

SC18IM704PW Block Diagram


Key Features

  • UART host interface to I2C-bus controller
  • Eight programmable I/O pins
  • High-speed UART: baud rate up to 460.8 kbit/s
  • UART message format resembles I2C-bus transaction format
  • 8 N 1 UART format (8 data bits, no parity bit, 1 stop bit)
  • Fast-mode I2C-bus: 375 kHz
  • 256-byte TX and RX FIFO
  • 1.71 V and 3.6 V operation with 5 V tolerant I/O pins

Temperature Range

  • -40 to 105 °C

ESD Protection

  • Exceeds 2000 V HBM per JESD22-A114

Product Longevity Program

  • This product is included in the NXP Product Longevity Program ensuring a stable supply of products for your embedded designs. The SC18IM704PW is included in the 10-year program."

Part numbers include: SC18IM704PW.

Comparison Table


Part Number UART SPI I2C GPIO Function
SC18IS604 NA 1.2 MHz 375 kHz 5 SPI to I2C
SC18IM704 460.8 Kbit/s NA 375 kHz 8 UART to I2C

I2C to SPI

Part Number UART SPI I2C GPIO Function
SC18IS606 NA 1.8 MHz 400 kHz 3 I2C to SPI


Part Number UART SPI I2C GPIO Function
SC16IS740/750/752 5 Mbit/s 15 Mbit/s 400 kHz 8 I2C/SPI to UART


Quick reference to our documentation types.

4 documents

Design Resources


1 hardware offering


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