ISD1730EYIR Voice Record/Playback IC Equivalent & Substitute Parts

Part Overview

The ISD1730EYIR is a ChipCorder® voice record/playback interface IC manufactured by Nuvoton Technology Corporation, designed for multiple message applications with recording and playback durations of 20 to 60 seconds. The device features pushbutton and SPI control interfaces, analog single-ended microphone input, and PWM speaker output with integrated automatic gain control and volume control.

The ISD1730EYIR is classified as obsolete. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support ongoing production or maintenance requirements for systems utilizing this component.

Substiute Parts

ISD1730EYIR

Nuvoton Technology CorporationIn Stock: 1039ISD1730EYIR Datasheet

Current PartRFQ

ISD1730SYIR

Nuvoton Technology CorporationIn Stock: 899ISD1730SYIR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ISD1730EYIR is determined by functional and electrical equivalence across the following critical parameters:

• Functional Compatibility: Interface type (Pushbutton, SPI), input signal type (Analog - Single Ended, Microphone), and output signal type (Analog - Single Ended, PWM Speaker Output)
• Performance Specifications: Sampling frequency range (4 ~ 12 kHz), recording/playback duration (20 ~ 60 Sec), and messaging capability (Multiple)
• Electrical Characteristics: Supply voltage range (2.4 V ~ 5.5 V), operating temperature range (-40°C ~ 85°C)
• Integrated Features: Automatic Gain Control and Volume Control functionality
• Physical Compatibility: Surface mount technology and package form factor

The ISD1730SYIR qualifies as a manufacturer-recommended substitute based on identical functional specifications, electrical parameters, and feature set. The primary difference is the package type: the substitute uses 28-SOIC packaging instead of 28-TSSOP packaging, which affects board layout and assembly considerations but does not alter electrical performance or signal characteristics.

Parameter Comparison

Engineering Selection Recommendations

The ISD1730SYIR is the manufacturer-recommended substitute for the obsolete ISD1730EYIR. Both parts share identical electrical specifications, functional capabilities, and compliance certifications (REACH Unaffected, EAR99 classification).

The ISD1730SYIR offers the advantage of active product status, ensuring ongoing availability and supply chain support. The substitute is RoHS3 compliant, providing enhanced environmental and regulatory alignment for new designs or production continuity.

The primary design consideration is package transition from 28-TSSOP to 28-SOIC. This change requires PCB layout modification and may affect assembly processes, but does not alter electrical performance, signal integrity, or functional behavior. Pin-to-pin compatibility must be verified against the specific application schematic and PCB footprint requirements.

Frequently Asked Questions (FAQ)

Q: Can the ISD1730SYIR be used as a direct replacement for the ISD1730EYIR?

A: The ISD1730SYIR is electrically and functionally equivalent to the ISD1730EYIR. However, the package change from 28-TSSOP to 28-SOIC requires PCB footprint modification. Pin assignments must be verified to ensure correct circuit implementation.

Q: What is the primary difference between these two parts?

A: The ISD1730EYIR uses 28-TSSOP packaging (11.80mm width), while the ISD1730SYIR uses 28-SOIC packaging (7.50mm width). All electrical specifications, signal characteristics, and functional features are identical.

Q: Why is the ISD1730EYIR classified as obsolete?

A: The ISD1730EYIR has reached end-of-life status. The ISD1730SYIR is the active equivalent part maintained by Nuvoton Technology Corporation for ongoing applications and new designs.

Q: Are there compliance differences between these parts?

A: Both parts share identical REACH and ECCN classifications (REACH Unaffected, EAR99). The ISD1730SYIR includes RoHS3 compliance certification, providing additional regulatory alignment.

Q: What packaging considerations apply when transitioning from ISD1730EYIR to ISD1730SYIR?

A: The 28-SOIC package is narrower (7.50mm) than the 28-TSSOP package (11.80mm). PCB layout, footprint design, and assembly processes must be updated accordingly. Pin pitch and lead configuration remain compatible with standard surface mount assembly equipment.

Q: Are the supply voltage and operating temperature ranges identical?

A: Yes. Both parts operate across 2.4 V to 5.5 V supply voltage and -40°C to 85°C temperature range. Electrical performance and reliability specifications are equivalent.