The NSC74 series is a powerful voice control chip that uses the Arm® Cortex®-M0 32-bit core, embedded with 256 KB to 1536 KB Flash memory and 6 KB to 12 KB static memory (SRAM). Peripherals provided by NSC74 include ADC, Timers, Infrared Carriers, Low Voltage Detection (LVD), Low Voltage Reset (LVR), up to 30 GPIO, SPI, Addressable LED, I²C, IR, PWM, and touch Control keys.

NSC74 application covers home appliances, medical devices, personal health care, electronic doorbells, smoke detectors, and elevator control panels.

• Feature
  

  -	OTA (Over the Air) updates voice content
  -	Voice recording and playback
  -	Playback two audio tracks at the same time
  -	10-bit SAR ADC
  -	Addressable LED driver
  -	Playback duration: 128” to 900” (SR: 16KHz)
  -	Output power: 0.7W (8Ω/5V)

• Specifications
  

  -	Arm® Cortex®-M0 core
  -	System frequency: 40 MHz
  -	Up to 30 GPIO
  -	Application interface: SPI, I²C, UART
  -	Operating voltage: 1.8 to 5.5V
  -	Sleep current: < 1 μA
  -	Embedded Flash: 2 Mbit to 12 Mbit

• System Block Diagram