Audio Codec

MIC_IN

SW1

DATA

GND

SW2

SW3

MIC_ DATA

GND

VDD

180

360

C3

R3

R4

C5

R2

TS2A116E

Cext

L

R

G

M

Mobile Device

Accessory

R1

MIC_BIAS

MIC_IN

C1

C2

Application

Processor

UART TX

UART RX

Comparator

Level

Shifter

MEMS

Microphone

C4

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TS2A116E

SCDS355 – MAY 2014

TS2A116E Audio Accessory Communicator and Authentication IC

1 Features

3 Description

The TS2A116E device is designed for use with

1

•

Single-Wire Communication Protocol by way of a

advanced headset accessories where a special

Single Contact Serial Interface

single-wire communication is used to identify the

•

Designed to Work with a Self-Charged Capacitor

accessory and its remote control key presses.

from the Microphone Bias Voltage

Communication with the host device is based on

standard UART protocol to send and receive data,

•

Supports 6-Bit Accessory ID to Differentiate up to

and it relies on the same microphone line used by the

63 Different Accessory Types

accessory.

This

special

technique

enables

the

•

Supports 3 Remote Control Bottoms

customer

to

establish

the

proprietary

headset

•

Baud Rate Supports 38.4K

solution; thus, differentiating itself from the rest of the

•

Backward Compatible for Microphone and

market.

Play or Pause Key Functions

The TS2A116E device is pre-programmed with an

•

Current Consumption <80 µA During Single-Wire

accessory IDs (AID); combined with the special

Transmission and Idle

communication

single-wire

protocol,

this

device

allows the phone to uniquely detect the accessory.

•

12-Pin Ultra Thin UQFN Package

The TS2A116E device also supports up to 3 remote

(2.0 × 1.7 mm, 0.4 mm pitch)

control

keys

and

utilizes

similar

single-wire

•

ESD Performance:

communication to the host chip for any key press

–

2 kV Human Body Model (A114B, Class II)

information. It is also backward compatible to support

the traditional microphone play and pause key

–

500 V Charged Device Model (C101)

functions

that

do

not

employ

the

single-wire

–

±8-kV Contact Discharge for DATA and KEY1,

communication scheme.

KEY2, and KEY3 Pins (IEC 61000-4-2)

The TS2A116E device is designed to operate from an

external self-charged capacitor which replenishes its

2 Applications

charge from the microphone bias voltage. No external

Headset Accessory with Remote Control Buttons

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 x 1.7 mm UQFN package.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

TS2A116E

UQFN (12)

2.00 mm × 1.70 mm

(1) For all available packages, see the orderable addendum at

the end of the data sheet.

4 Application Diagram

1

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCT PREVIEW Information. Product in design phase of

development. Subject to change or discontinuance without notice.