Conexant launches audio playback IC product line

21ic News Corp. has introduced the audio playback chip KX1400, which can play 8KHz audio data directly in an external speaker through an on-chip digital audio processor and a Class D drive. As the first product in the Conexant audio playback product line, the KX1400 has been acquired by Keeterex, a developer of mixed-signal integrated circuits and systems.

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Conexant's audio playback product line is ideal for most applications that require audio to play pre-recorded data. Whether it's vending machines, toys or crosswalk signals and interactive automated service enquiries, Conexant's easy-to-use audio playback devices are the perfect way to integrate audio functions into a wide range of devices and home appliances, greatly improving the user experience. .

In terms of function, the KX1400 reads audio data from an external microcontroller (MCU) or external non-volatile random access memory (NVRAM). The on-chip audio processor and integrated Class D amplifier provide high-quality audio without the need for additional components. Low-power CMOS technology and an alternate power-saving state make Conexant's audio player IC ideal for battery-powered applications.

Dr. Sailesh Chittipeddi, President and CEO of Conexant Systems, said: "Conexant has proven expertise in the history of audio technology innovation and designing solutions that meet user needs. We have found that in many cases, Users are committed to developing applications that require simple audio playback to small MCUs. The KX1400 is designed specifically for this purpose, eliminating the need for user-driven and firmware support associated with highly integrated audio subsystem chips, so there is no need for high overhead costs. It is ideal for these applications."

The KX1400 supports 12-bit PCM and 4-bit IMA ADPCM data formats with a built-in tone generator capable of generating 4096 different frequencies. The on-chip audio processor reduces the need for external low-pass filters in a wide variety of situations. The KX1400 can be operated in stand-alone mode or connected to an MCU host. Audio data is provided to the KX1400 from a user-programmed external serial memory or host MCU. Under the control of the MCU, the user can select the phrase or audio sequence to play from the external memory, and play the audio sequence by controlling or inputting the audio data to the on-chip audio processor. The MCU is not required in stand-alone mode. When resetting, the KX1400 plays a phrase from the external memory and then returns to the standby power saving state.

Other features include:

• On-chip tone generator • Operates in stand-alone mode or as an MCU external device • Integrated Class D speaker driver • No external low-pass filter required • On-chip oscillator – no XTAL required
• Configurable universal clock output • Two general purpose digital outputs • Low battery stand-alone state (1 μA Typ.)
• Operating voltage: 2.7V to 5.5V
• Operating temperature: -40 ° C to 85 ° C
• 24-pin 4X4mm QFN (KX1400EG) package

Jim Divine, President of Keterex, said: "Conexant's focus on audio technology and its broad and growing product portfolio make it an ideal partner for our existing KX1400 users."

A complete evaluation kit with reference board and all necessary technical documentation and software are available now. When the KX1400 is ordered in quantities of one hundred, the price for a single piece is $1.56.

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Method of use: the best stable in horizontal plane, installed on the Fingerprint Lock Motoroutput shaft parts, cannot use a hammer to knock, knock prone to press into the dc Fingerprint Lock Motor  drive, may cause damage to internal components, and cannot be used in the case of blocked.

Operating temperature range:

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The figures stated in the catalog specifications are based on use at  ordinary room temperature catalog specifications re based on use at ordinary room temperature  (approximately20~25℃.

If a  lock motor  is used outside the prescribed temperature range,the grease on the gearhead area will become unable to function normally and the motor will become unable to start.Depending on the temperature conditions ,it may be possible to deal with them by changing the grease of the motor's parts.Please feel free to consult with us about this.

Storage temperature range:

Fingerprint Lock Motor should be stored ta a temperature of -15~65℃.

In case of storage outside this range,the grease on the gearhead area will become unable to function normally and the motor will become unable to start.

Service life:

●Use with a load that exceeds the rated torque

●Frequent starting

●Momentary reversals of turning direction

●Impact loads

●Long-term continuous operation

●Forced turning using the output shaft

●Use in which the permitted overhang load or the permitted thrust load is exceeded

●A pulse drive ,e.g.,a short break,counter electromotive force,PWM control

●Use of a voltage that is nonstandard as regards the rated voltage

●Use outside the prescribed temperature or relative-humidity range,or in a special environment.

●Please consult with us about these or any other conditions of use that may apply,so that we can be sure that you select the most appropriate model.

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