SY7T609+R1 - Energy Measurement Processor with Integrated Oscillator & Relay Control


  • High resolution delta-sigma ADC with two analog (sensor) inputs
  • Precision internal voltage and timing references minimize external components
  • 24-bit energy measurement processor with nonvolatile storage of calibration and configuration data
  • Flexible SPI or UART interface options with user configurable DIO
  • Relay Control
  • Small 14-pin TSSOP package

Typical Application

The SY7T609+R1 firmware implements features ideally suited for applications such as smart-plugs, smart appliances, lighting and home/building automation. It provides relevant signal processing and measurement outputs along with auxiliary functions such as configurable alarm detection, calibration commands, zero-crossing detection, and user DIO control. The SY7T609+R1 features relay control for non-latching and latching relays (single and dual coil). The relay control includes programmable delays for both relay’s open and close commands, programmable pulse width and reference to line voltage.

Typical smart plug application


The SY7T609+R1 is an energy measurement processor (EMP) designed for monitoring and relay control of any 2-wire AC (or DC) circuit. With an integrated oscillator and small profile, it is ideally suited for BOM optimized applications such as smart-plugs, smart appliances, lighting and building automation. SPI and UART interface options are supported. An optimized protocol for low baud rate UART communications further reduces the BOM cost when data isolation is required. 


  • smart-plugs

  • smart appliances

  • lighting and home/building automation.