ISD2575S Voice Record/Playback IC Equivalent & Substitute Parts

Part Overview

The ISD2575S is a ChipCorder® voice record/playback interface IC manufactured by Nuvoton Technology Corporation, designed for multiple message applications with 75 seconds of recording/playback duration. This device features pushbutton control, analog microphone input, and PWM speaker output with automatic gain control.

The ISD2575S is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure component availability, and support ongoing production or maintenance requirements for systems utilizing this interface IC.

Substiute Parts

ISD2575S

Nuvoton Technology CorporationIn Stock: 5368ISD2575S Datasheet

Current PartRFQ

ISD1790SY

Nuvoton Technology CorporationIn Stock: 1187ISD1790SY Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ISD2575S is determined by compatibility across the following critical parameters:

Package Compatibility: Both the main part and substitute must use the 28-SOIC surface mount package to ensure PCB layout and footprint compatibility.

Functional Interface: The substitute must support pushbutton control and analog microphone input to maintain system control architecture.

Signal Processing: The substitute must provide PWM speaker output or equivalent analog output capability for audio reproduction.

Supply Voltage Range: The substitute voltage specification must overlap or encompass the operating range of the original design to ensure power supply compatibility.

Operating Temperature: The substitute must support the 0°C ~ 70°C operating range to maintain thermal performance specifications.

Series Continuity: Preference is given to ChipCorder® series devices from Nuvoton Technology Corporation to maintain design consistency and feature set alignment.

The ISD1790SY meets these substitution criteria as a manufacturer-recommended equivalent within the same product family.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The ISD2575S is obsolete and no longer manufactured. The ISD1790SY is an active product with ongoing manufacturer support, ensuring long-term availability and technical documentation access.

Compliance and Certification: The ISD1790SY is ROHS3 compliant, meeting current environmental and regulatory requirements. The ISD2575S is RoHS non-compliant. For new designs or systems requiring regulatory compliance, the ISD1790SY is the appropriate selection.

Supply Voltage Compatibility: The ISD1790SY supply voltage range (2.4 V ~ 5.5 V) partially overlaps with the ISD2575S range (4.5 V ~ 6.5 V) at 4.5 V ~ 5.5 V. Applications operating at the upper end of the ISD2575S specification (5.5 V ~ 6.5 V) require voltage verification before substitution.

Package and Interface Compatibility: Both devices use identical 28-SOIC surface mount packaging, ensuring direct PCB compatibility. The ISD1790SY supports both pushbutton and SPI interfaces, providing enhanced control flexibility compared to the pushbutton-only ISD2575S.

Functional Parameters: The ISD1790SY sampling frequency range (4 ~ 12 kHz) encompasses the ISD2575S fixed frequency (6.4 kHz), and the duration range (60 ~ 180 Sec) includes the ISD2575S specification (75 Sec), ensuring functional compatibility for voice record/playback applications.

Frequently Asked Questions (FAQ)

Q: Can the ISD1790SY directly replace the ISD2575S on existing PCBs?

A: Yes, the ISD1790SY uses the identical 28-SOIC package and pin configuration as the ISD2575S, enabling direct PCB compatibility. However, verify that your power supply operates within the overlapping voltage range (4.5 V ~ 5.5 V) before substitution.

Q: What is the primary difference between the ISD2575S and ISD1790SY?

A: The ISD1790SY offers extended recording duration (60 ~ 180 Sec versus fixed 75 Sec), variable sampling frequency (4 ~ 12 kHz versus fixed 6.4 kHz), additional SPI interface support, volume control feature, and ROHS3 compliance. The ISD2575S is obsolete; the ISD1790SY is actively manufactured.

Q: Does the ISD1790SY support the same microphone input and speaker output as the ISD2575S?

A: Yes, both devices support analog single-ended microphone input. The ISD1790SY provides both analog single-ended and PWM speaker output options, offering greater flexibility than the ISD2575S PWM-only output.

Q: Are there supply voltage limitations when substituting the ISD1790SY?

A: The ISD1790SY operates at 2.4 V ~ 5.5 V, while the ISD2575S operates at 4.5 V ~ 6.5 V. The compatible overlap is 4.5 V ~ 5.5 V. Applications requiring operation above 5.5 V must verify alternative solutions or confirm that the ISD1790SY can operate at the required voltage.

Q: Is the ISD1790SY suitable for new product designs?

A: Yes, the ISD1790SY is an active product with ROHS3 compliance, making it suitable for new designs. The ISD2575S is obsolete and should not be used in new applications.

Q: What is the MSL (Moisture Sensitivity Level) for both devices?

A: Both the ISD2575S and ISD1790SY have MSL 3 (168 Hours), indicating identical moisture handling and storage requirements.