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ISD1820 Datasheet Preview

ISD1820 Datasheet

Voice Recorder

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ISD1820
Voice Record Module is base on ISD1820, which a multiple-message record/playback device. It can
offers true single-chip voice recording, no-volatile storage, and playback capability for 8 to 20 seconds.
The sample is 3.2k and the total 20s for the Recorder.
This module use is very easy which you could direct control by push button on board or by Microcontroller
such as Arduino, STM32, ChipKit etc. Frome these, you can easy control record , playback and repeat and
so on.
Feature
Push-button interface, playback can be edge or level activated
Automatic power-dwon mode
On-chip 8Ω speaker driver
Signal 3V Power Supply
Can be controlled both manually or by MCU
Sample rate and duration changable by replacing a single resistor
Record up to 20 seconds of audio
Dimensions: 37 x 54 mm
If you want change record duration, an external resistor is necessary to select the record duration and
sampling frequency, which can range from 8 20 seconds (4-12kHz sampling frequency). The Voice
Record Module of our provide default connect 100k resistor through P2 by short cap. So the default record
duration is 10s.
Free Datasheet http://www.nDatasheet.com




ETC

ISD1820 Datasheet Preview

ISD1820 Datasheet

Voice Recorder

No Preview Available !

1. PLAYE Playback, Edge-activated:When a HIGH-going transition is detected on continues until
an End-of-Message (EOM) marker is encountered or the end of the memory space is reached.
2. REC The REC input is an active-HIGH record signal.The device records whenever REC is HIGH.
This pin must remain HIGH for the duration of the recording. REC takes precedence over either
playback(PLAYL or PLAYE) signal.
3. Speaker Outputs The SP+ and SP- pins provide direct drive for loudspeakers with impedances
as low as 8Ω.
4. MIC Microphone Input, the microphone input transfers its signals to the on-chip preamplifier.
5. REPLAY loop play the record.
6. FT Feed Through: This mode allows use of the speaker drivers for external signals.
7. ISD1820 IC chip
8. Lead Out IO VCC LED NC FT GND / VCC REC PLAYE PLAYL GND
9. P2 – default short connection ROSC to 100kΩ resistance, that’s means record duration is 10s
10. PLAYL Playback, Level-activated, when this input pin level transits for LOW to HIGH, a
playback cycle is initiated.
Record Operate Guide
1. Push REC button then the RECLED(D1) will light and keep push until record end.
2. Release the REC button
3. Select Playback mode: PLAYE, just need push one time, and will playback all of the record or
power down ; PLAYL, you need always push this button until you want to stop playback record or
Free Datasheet http://www.nDatasheet.com


Part Number ISD1820
Description Voice Recorder
Maker ETC
PDF Download

ISD1820 Datasheet PDF






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