E.A.’s Model:

KMBT018 A(ISSC 2021S)

Approval Memo:



Device Features
  • Support preliminary Bluetooth v4.1 function and backward compatible with BT3.0, 2.0 and 1.2.
  • KMBT018 own Bluetooth software stack for the headset or speaker application. It supports following profiles : – Hands Free 1.6 – Headset 1.1 – A2DP 1.2 – AVRCP 1.5 – SPP 1.0
  • Integrated 16/32 bits DSP core running up to 72MHz that supports: – Dual microphone noise suppression – Echo cancelation – SBC/AAC_LC audio format decoding – Automatic volume control for speaker output
  • Integrated a 20-bit 98dB SNR ( A-weighted) stereo DAC ,SBC and
  • optional AAC decoding
  • Connections to two phones with HFP/A2DP profiles
  • Built-in four languages ( Chinese/ English/ Spanish/ French) voice prompts
  • Ultra low power consumption under 10mA for SCO/A2DP link
  • Capable charging voltage from an empty battery and sustain a direct DC
  • input voltage up to 7V
  • Charging current up to 350mA
General Description
  • Bluetooth® v4.1 specification fully compliant with Bluetooth specification and completely backward-compatible with Bluetooth 3.0, 2.0 or 1.2 systems
  • It incorporates Bluetooth 1M/2M/3Mbps RF, single-cycle MCU, MODEM, UART interface, and ISSC’s own Bluetooth software stack to achieve the required BT v4.1 with EDR functions .
  • To provide the superior audio and voice quality, it also integrates a DSP co-processor, a PLL, and a CODEC dedicated for voice and audio applications.
  • For voice, not only the basic CVSD encoding and decoding but also the enhanced noise reduction and echo cancellation are implemented by the built-in DSP to reach the better quality in the both sending and receiving sides. For enhanced audio applications, SBC and AAC (optional) decoding functions can be also carried out by DSP to satisfy Bluetooth A2DP requirements.
  • Minimize the external components required for portable devices, an EEPROM and a Power Management Unit including the battery voltage sensor, battery charger, switching regulator and LDOs are integrated to reduce BOM cost for various Bluetooth applications.
  • Surface-mount, Size: 12.20×9.40×1.60mm max

Home Entertainment Ecosystem

  • Bluetooth stereo speaker
  • Bluetooth stereo speaker phone
  • Bluetooth car audio unit
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