TS2A116E - Audio Headset Authentication and Communication IC

The TS2A116E device is designed for use with advanced headset accessories where a special single-wire communication is used to identify the accessory and its remote control key presses. Communication with the host device is based on standard UART protocol to send and receive data, and it relies on the same microphone line used by the accessory. This special technique enables the customer to establish the proprietary headset solution; thus, differentiating itself from the rest of the market.

The TS2A116E device is pre-programmed with an accessory IDs (AID); combined with the special communication single-wire protocol, this device allows the phone to uniquely detect the accessory. The TS2A116E device also supports up to 3 remote control keys and utilizes similar single-wire communication to the host chip for any key press information. It is also backward compatible to support the traditional microphone play and pause key functions that do not employ the single-wire communication scheme.

The TS2A116E device is designed to operate from an external self-charged capacitor which replenishes its charge from the microphone bias voltage. No external power supply is required. The TS2A116E device is configured to operate using standard 38.4 kbps baud rate UART protocol. It consumes maximum operating current of <80 μA during single-wire transmission or during the idle state to minimize power consumption. The device is designed with an ultra thin 2.0 × 1.7 mm UQFN package.

• Single-Wire Communication Protocol by way of
  a Single Contact Serial Interface
• Designed to Work with a Self-Charged Capacitor
  from the Microphone Bias Voltage
• Supports 6-Bit Accessory ID to Differentiate up
  to 63 Different Accessory Types
• Supports 3 Remote Control Bottoms
• Baud Rate Supports 38.4K
• Backward Compatible for Microphone and
  Play or Pause Key Functions
• Current Consumption <80 μA During Single-Wire
  Transmission and Idle
• 12-Pin Ultra Thin UQFN Package
  (2.0 × 1.7 mm, 0.4 mm pitch)
• ESD Performance:
  • 2 kV Human Body Model (A114B, Class II)
  • 500 V Charged Device Model (C101)
  • ±8-kV Contact Discharge for DATA and KEY1,
    KEY2, and KEY3 Pins (IEC 61000-4-2)