OTP Voice Chip

WTN6 Series

· High Performance · High Scalability

40s, 96s, 170s three capacities are available

Model Selection





  1. Working Voltage: DC 2.4V – 5.2V
  2. Sleeping power: ≤5μA
  3. Output: DAV/PWM
  4. Control mode: Button, SPI
  5. Support Custom service: 24/7 sample service


Interface SPI/IIC/Button/one-line/two-line
Size 4.9*6.0*1.75(mm)
Sampling 16KHz maximum 600s
Working Voltage DC 2.2V~5.5V
Temperature -40°C~+85°C
Package SOP8


Smart Lock


Small Appliance


OTP Voice Chip

OTP voice chip stands for one-time-programmable voice chip, which is an ideal and mature solution playing back changeless recordings.
This chip is ideal for use in telephones, games, intelligent transport equipment like car parks and toll stations, home security alarms, children's audiobooks, appliances and more. It is an OTP voice chip with a voice length of about 40 seconds (6KHz sampling rate). It can store 700 voice files, and it comes with an internal integrated clock oscillator. In addition, it has 7 different types of button triggers, and it has a stabilization time for the trigger. Also, the OTC voice chip can load an estimated 63 voice addresses and supports audio file playback with various sampling rates.

Product details:

  1. Working voltage: 2.4V~5.2V;
  2. In standby mode, the quiescent current is less than 5uA (after the voice playback is completed, the DATA/CLK signal line can sleep at a stable level for about 2 seconds);
  3. Accurate +/-1% internal oscillation, with low voltage reset (LVR=1.8V);
  4. 12-bit PWM pure audio output, can directly drive 8Ω/0.5W speakers and buzzer, DAC audio output, can be connected to an external power amplifier;
  5. With serial port control mode: count pulse, button, one-line serial port, two-line serial port (up to 224 segments of voice can be loaded, consult a technical consultant for more details);
  6. Support BUSY status output (standard program BUSY pin is high level by default, and low level during voice playback. In addition, in serial port control mode, only when the voice chip receives the correct voice address timing sequence BUSY pin will have a level change );


Sampling16KHz maximum 600s
Working VoltageDC 2.2V~5.5V
  • The control mode and output mode of the chip have been set when programming the program and cannot be changed again. Before process anything, please consult technical sales for custom voice service.
  • DAC output Demo Video
  • PWM output Demo Video

Pin Details:Example Application 

 Pad NamePad No.ATTR.Description
PA21I/OBUSY signal output
PA12I/OTwo-wire serial port clock signal input terminal/one-wire serial port data signal input terminal/digital pulse data signal input terminal
PA03I/O Two-wire serial port data signal input
PWM-5outPWM output pin
PWM+/DAC7I/OPWM, PAC ouput pin

Our Products:

Part No.FunctionCapacityAudio QualityOutputCustom Level
WT588F02A/B-8SAudio writeable, custom function170 sIntermediateDAC/PWMHigh
WT588F08A-8SAudio writeable, programmable680 sIntermediateDAC/PWMHigh
WT588F02A-16SAudio writeable, custom function170 s ~ 3 HIntermediateDAC/PWMHigh
WTN6XXXOTP40 s ~ 170 s HighDAC/PWMCustom
WTN6040F-8SAdequate Supply40 s IntermediateDAC/PWMCustom
WTN1 serialAffordable, short audio10 s ~ 40 sHighDAC/PWMN/A
WT588S/HXX-16SSingle chip with large capacity Flash320 s ~ 1280 sHighDAC/PWMLow

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