I2C to UART bridge as breakout or in DIP package For a project, I need to connect more than one device to an Arduino through a serial port with hardware flow control (RTS/CTS). 

Sparkfun used to make breakout boards for the SC16IS750, but this product is discontinued and I can't find any place to order it. There are also plenty of ICs doing what I need, but I am not keen on soldering SMD components and I cannot find any products coming in e.g. an old fashioned DIP package.

Does someone know about an available breakout board or a DIP packages I2C to UART bridge? Since the device will be battery powered, I would prefer a dedicated low-power circuit instead of a programmed microcontroller as suggested by majenko.
Perhaps what you're looking for:

http://sandboxelectronics.com/?product=sc16is750-i2cspi-to-uart-bridge-module



From that page:




  SC16IS750 I2C/SPI to UART Bridge Module
  
  This module is designed to enable I2C/SPI to UART conversion. It works in I2C/SPI slave mode and interfaces with devices working in I2C/SPI master mode. There are also 4 extra GPIOs for IO expansion. NXP SC16IS750 is used as the key component on this module. Flow control and modem signals are also supported.
  
  This module is useful when extra UART interface is needed. Due to the multi-slave characteristics of I2C and SPI, many UART interfaces could be added to the system at the same time.