Bluetooth Audio Module BTM-68D BTM-68D DATA SHEET 10 June 2012 Version 2.0 SHENZHEN TTK TECHNOLOGY CO.,LTD. Copyright © TTK Technologies. all rights reserved. Shenzhen TTK Technology CO.,LTD TEL：0755-89484041 FAX：0755-89484040 1.
Bluetooth Audio Module BTM-68D TABLE OF CONTENTS 1.0 Block Diagram...................................................................................................... 5 2.0 Electrical Characteristics ...................................................................................... 6 3.0 Device Terminal Functions................................................................................. 10 4.0 Example Application Schematic........................................................................
Bluetooth Audio Module BTM-68D DESCRIPTION: FEATURES: BTM-68D is the latest generation of bluetooth ．Plug n' Play Bluetooth Solution for mono Module. It provides highest level of integration With integrated 2.4GHz radio, DSP, battery Charger, stereo codec, and antenna ready. Mono and stereo audio applications. BTM-68D is also ready to support the latest Bluetooth 2.1 standard and support for secure Simple pairing.
Bluetooth Audio Module BTM-68D REVISION HISTORY Version Comment Custom Date 1.0 Preliminary Datasheet zuoguoqiang 07/2011 2.0 Update Antenna Datasheet zuoguoqiang 06/2012 Shenzhen TTK Technology CO.,LTD TEL：0755-89484041 FAX：0755-89484040 4.
Bluetooth Audio Module 1.0 BTM-68D Block Diagram Block Diagram deleted here. Can be found as confidential exhibit within this FCC Filing (FCC ID: WYHBTM-68D) Figure 1: Block diagram of BTM-68D 。Bluetooth Version 。Operating Frequency 。Modulation 。Transmit Power 。Sensitivity 。Transmission rate 。Security features 。Support profiles 。Power 。Operating Temperature 。Size Bluetooth v2.1+EDR 2.4GHz-2.48GHz ISM band GFSK(Gaussian Frequency Shift Keying) ≤4dBm, Class 2 ≤-81dBm at 0.1% BER 1.8M/S—2.
Bluetooth Audio Module BTM-68D 2.0 Electrical Characteristics Recommended operating conditions Min Typ Max Unit Operating temperature -20 20 70 ℃ VDD_BAT 3.0 3.8 4.2 V VDD_CHG 4.5 5 6.5 V VDD_IO 1.7 1.8 1.95 V Table 1:Recommended operating conditions Battery charger Charger Mode(BAT_P rising to 4.2V) Min Typ Max Unit Supply current(a) -- 4.
Bluetooth Audio Module Trickle charge voltage threshold Float voltage (with correct trim value set), VFLOAT (f) Float voltage trim step size(f) Battery charge termination current, % of fast charge current BTM-68D -- 2.9 -- V 4.10 4.15 4.
Bluetooth Audio Module BTM-68D The RESET pin is an active low reset and is internally filtered using the internal low frequency clock oscillator. A reset will be performed between 1.5 and 4.0ms following RESET being active. It is recommended that RESET be applied for a period greater than 5ms.BTM-68D has an internal reset circuitry ,when BTM-68D input 5V charging voltage, Module reset once. The capacitor discharges through 220 k resistor, which eventually deactivates the reset.
Bluetooth Audio Module BTM-68D MUTE BTM-68D can output a high level to control the amplifier mute. When bluetooth normal working, Module output high level to control the amplifier open. Standby, Module output low level to control the amplifier off. Figure 3: BTM-68D Mute contorl circuitry Shenzhen TTK Technology CO.,LTD TEL：0755-89484041 FAX：0755-89484040 9.
Bluetooth Audio Module BTM-68D 3.
Bluetooth Audio Module BTM-68D 10 PIO[5] PIO port Programmable input/output line 11 1V8 1.8V POWER Positive supply for 1.
Bluetooth Audio Module BTM-68D 4.0 Example Application Schematic Shenzhen TTK Technology CO.,LTD TEL：0755-89484041 FAX：0755-89484040 12.
Schematic deleted here.
Bluetooth Audio Module BTM-68D 5.0 Package Dimensions Unit: mm Shenzhen TTK Technology CO.,LTD TEL：0755-89484041 FAX：0755-89484040 13.
Bluetooth Audio Module BTM-68D 6.0 Layout Guidelines 6.0.1 Audio Layout Route audio lines as differential pairs. The positive and negative signals should run parallel and close to each other until they are converted to single-ended signals. Use dedicated audio ground plane for entire audio section. 6.0.2 Antenna Design Do not place GND plane or any metal directly under the antenna of BTM-68D.
Bluetooth Audio Module BTM-68D 7.0 Contact Information Sales : ttk@szttk.com Technical Support: zuogq@szttk.com Address: 8th Floor,Southland Building,minzhi hongshan , Mei long Road, long hua Town, Bao'an District,shenzhen Website: WWW.szttk.com Shenzhen TTK Technology CO.,LTD TEL：0755-89484041 FAX：0755-89484040 15.
