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Product Detailed Parameters
- Description：IC VOICE REC/PLAY 80SEC 28SOIC
- Series：ChipCorder®
- Mfr：Nuvoton Technology Corporation
- Package：Tube
- Interface：Pushbutton, SPI
- Input Signal：Analog - Single Ended, Microphone
- Output Signal：Analog - Single Ended, PWM Speaker Output
- Sampling Frequency：4 ~ 12kHz
- Duration：26 ~ 80 Sec
- Filter Pass Band：-
- Messaging：Multiple
- Oscillator Type：Internal
- Features：Automatic Gain Control, Volume Control
- Operating Temperature：-40°C ~ 85°C (TA)
- Voltage - Supply：2.4 V ~ 5.5 V
- Mounting Type：Surface Mount
- Package / Case：28-SOIC (0.295", 7.50mm Width)
- Supplier Device Package：28-SOIC
- Grade：-
- Qualification：-
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Overview
The ISD1740SYI is a single-chip voice record and playback device from the Nuvoton ChipCorder series, housed in a 28-SOIC package. It supports multiple message recording with a duration range of 33 to 100 seconds. The sampling frequency is adjustable between 4 kHz and 12 kHz via an external resistor. Operating voltage spans 2.4 V to 5.5 V, and the device operates within a temperature range of -40°C to 85°C. Interfaces include SPI and push-button controls.
Feature Summary
- Integrated non-volatile storage using Multi-Level Storage (MLS) technology for reliable message retention without power.
- Supports both standalone push-button operation and microcontroller-controlled SPI interface modes.
- Includes on-chip oscillator, microphone preamplifier with Automatic Gain Control (AGC), and PWM Class D speaker driver.
Applications
- Standalone voice messaging systems
- Industrial control panel announcements
- Consumer product voice prompts
Procurement Notes
Verify component authenticity through authorized distributors or direct manufacturer channels due to potential availability constraints. Confirm the specific suffix matches the required package and temperature grade. Review the latest Product Change Notification (PCN) for any manufacturing updates. Ensure supply chain stability as end-of-life status may affect long-term sourcing.
Selection Notes
Select this model when a fixed message duration between 33 and 100 seconds is required. Choose based on the desired audio quality by setting the sampling frequency between 4 kHz and 12 kHz. Verify that the 28-SOIC package fits the PCB layout. Ensure the system voltage falls within the 2.4 V to 5.5 V operating range.
Part Context
This component belongs to the Nuvoton ISD1700 ChipCorder series, which provides fully integrated voice recording solutions. The series is designed for applications requiring simple, low-cost voice interaction without complex digital signal processing. It utilizes proprietary MLS technology to manage memory addresses automatically.
Replacement Considerations
Check for MFR recommended substitutes such as other ISD17xx variants with compatible pinouts and memory sizes. Verify electrical specifications and package dimensions before substitution. Consult official datasheets for functional equivalence.
