ISD1820
Overview
- 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
- 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.
- REC - The REC input is an active-HIGH record 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.
- Speaker Outputs - The SP+ and SP- pins provide direct drive for loudspeakers with impedances as low as 8Ω.
- MIC - Microphone Input, the microphone input transfers its signals to the on-chip preamplifier.
- REPLAY - loop play the record.
- FT - Feed Through: This mode allows use of the speaker drivers for external signals.
- ISD1820 - IC chip
- Lead Out IO - VCC LED
