ISD1740 DATASHEET PDF

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The message duration is user selectable in ranges from 26 seconds to seconds, depending on the specific device. The sampling frequency of each device can also be adjusted from 4 kHz to 12 kHz with an external resistor, giving the user greater flexibility in duration versus recording quality for each application. Operating voltage spans a range from 2. The device incorporates a proprietary message management system that allows the chip to self-manage address locations for multiple messages.

This unique feature provides sophisticated messaging flexibility in a simple push-button environment. With vAlert, the device flashes an external LED to indicate that a new message is present. Recordings are stored into on-chip Flash memory, providing zero-power message storage.

Audio data are stored directly in solid-state memory without digital compression, providing superior quality voice and music reproduction. Voice signals can be fed into the chip through two independent paths: a differential microphone input and a single-ended analog input. While in Standalone mode, the ISD devices automatically enter into power down mode for power conservation after an operation is completed.

In the SPI mode, the user has full control via the serial interface in operating the device. This includes random access to any location inside the memory array by specifying the start address and end address of operations. This register allows flexible configuration of audio paths, inputs, outputs and mixing. Utilizing the capabilities of ISD Series, designers have the control and flexibility to implement voice functionality into the high-end products. Notice: The specifications are subject to change without notice.

Please contact Winbond Sales Offices or Representatives to verify current or future specifications. Also refer to the website for any related application notes. ISD 20 secs 12 kHz 8 kHz 6. Data is latched into the device on the rising edge of SCLK. Analog Ground: Ground path for analog circuitry.

AnaIn: Auxiliary analog input to the device for recording or feed-through. MIC-: Inverting input of the differential microphone signal. Ground: Ground path for negative PWM speaker drive. Ground: Ground path for positive PWM speaker drive. Volume: This control has 8 levels of volume adjustment. Oscillator Resistor: A resistor determines the sample frequency of the device, which sets the duration.

Analog Power Supply. Power supply for analog circuitry. Feed-through: Enable the feed-through path for AnaIn signal to the outputs. Playback: Plays the recorded message individually, or plays messages sequential in a looping mode. Record: When active, starts recording message.

Erase: When active, can erase individual message or do global erase. Forward: Advances to the next message from the current location. An open drain output. Can review ready or interrupt status. As completed, the device automatically enters into the power-down state.

For technical details, please refer to the design guide. Figure Delay increases proportionally for slower sampling frequency. Exposure to the absolute maximum ratings may affect device reliability. Functional operation is not implied at these conditions. LED output during Record operation. They make no representation or warranty that such applications shall be suitable for the use specified. Each design has to be optimized in its own system for the best performance on voice quality, current consumption, functionalities and etc.

Please refer to the applications notes or consult Winbond for layout advice. It is important to have a separate path for each ground and power back to the related terminals to minimize the noise.

Also, the power supplies should be decoupled as close to the device as possible. See recommendations from below links or other Application Notes in our websites. Contact the local Winbond Sales Representatives for any questions and the availability. Furthermore, Winbond products are not intended for applications wherein failure of Winbond products could result or lead to a situation wherein personal injury, death or severe property or environmental damage could occur. Winbond customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify Winbond for any damages resulting from such improper use or sales.

The contents of this document are provided only as a guide for the applications of Winbond products. Winbond makes no representation or warranties with respect to the accuracy or completeness of the contents of this publication and reserves the right to discontinue or make changes to specifications and product descriptions at any time without notice.

No license, whether express or implied, to any intellectual property or other right of Winbond or others is granted by this publication. In no event, shall Winbond be liable for any damages whatsoever including, without limitation, damages for loss of profits, business interruption, loss of information arising out of the use of or inability to use the contents of this documents, even if Winbond has been advised of the possibility of such damages.

Application examples and alternative uses of any integrated circuit contained in this publication are for illustration only and Winbond makes no representation or warranty that such applications shall be suitable for the use specified.

The year retention and K record cycle projections are based upon accelerated reliability tests, as published in the Winbond Reliability Report, and are neither warranted nor guaranteed by Winbond.

In the event any inconsistencies exist between the information in this and other product documentation, or in the event that other product documentation contains information in addition to the information in this, the information contained herein supersedes and governs such other information in its entirety. This datasheet is subject to change without notice. All rights reserved.

All other trademarks are properties of their respective owners.

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Standalone operation using just six onboard buttons or the onboard SPI interface. Record using built-in microphone or external line in best results. Speaker and analogue AUX outputs. Wide V dc operating voltage.

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