ISD2575P Equivalent & Substitute Parts

Part Overview

The ISD2575P is a voice record/playback interface IC from Nuvoton Technology Corporation's ChipCorder® series, designed for multiple message applications with 75-second recording and playback duration. The device features pushbutton control, automatic gain control, and operates across a 4.5V to 6.5V supply range in a 28-DIP through-hole package.

The ISD2575P 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 voice recording interface.

Substiute Parts

ISD2575P

Nuvoton Technology CorporationIn Stock: 1246ISD2575P Datasheet

Current PartRFQ

ISD1790PY

Nuvoton Technology CorporationIn Stock: 1353ISD1790PY Datasheet

MFR RecommendedRFQ

ISD4002-120PY

Nuvoton Technology CorporationIn Stock: 1967ISD4002-120PY Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the ISD2575P is determined by compatibility across the following critical parameters:

Physical Compatibility: All substitute parts must use the 28-DIP through-hole package to ensure direct PCB mounting compatibility without redesign.

Functional Compatibility: Substitute parts must support voice record/playback functionality with multiple message capability and maintain the ChipCorder® series lineage from Nuvoton Technology Corporation.

Electrical Compatibility: Operating temperature range (0°C ~ 70°C) and supply voltage specifications must be evaluated against application requirements. Substitute parts may operate across different voltage ranges and sampling frequencies, provided the application design accommodates these differences.

Interface Compatibility: The original ISD2575P uses pushbutton control. Substitute parts may include additional interface options (such as SPI) while maintaining core functionality.

Two substitute parts are identified: ISD1790PY and ISD4002-120PY. Both are active ChipCorder® products in 28-DIP packages from Nuvoton Technology Corporation, providing extended recording duration and enhanced features compared to the obsolete ISD2575P.

Parameter Comparison

Engineering Selection Recommendations

ISD1790PY is the manufacturer-recommended substitute for the ISD2575P. This part maintains pushbutton interface compatibility while adding SPI control capability. The ISD1790PY is an active product with ROHS3 compliance, addressing the RoHS non-compliance status of the obsolete ISD2575P. Extended recording duration (60 ~ 180 Sec) and configurable sampling frequency (4 ~ 12kHz) provide design flexibility. The wider supply voltage range (2.4 V ~ 5.5 V) encompasses the original 4.5 V ~ 6.5 V specification, ensuring compatibility with existing power supplies.

ISD4002-120PY is an alternative substitute offering 2-minute recording duration and SPI interface control. This part is ROHS3 compliant and active. The narrower supply voltage range (2.7 V ~ 3.3 V) requires power supply redesign and is not directly compatible with the original ISD2575P voltage specification. Selection of ISD4002-120PY is appropriate only when application requirements support the reduced voltage range and SPI-only interface.

Both substitute parts are available in the same 28-DIP through-hole package, eliminating PCB redesign requirements. Both maintain the 0°C ~ 70°C operating temperature range of the original part.

Frequently Asked Questions (FAQ)

Q: Can ISD1790PY be used as a direct replacement for ISD2575P without PCB modifications?

A: Yes. Both parts use the 28-DIP through-hole package with identical physical dimensions (0.600", 15.24mm). Pin-level compatibility must be verified against the specific application schematic, as interface options differ (ISD1790PY adds SPI capability). No PCB layout changes are required for package compatibility.

Q: What is the primary difference between ISD1790PY and ISD4002-120PY?

A: ISD1790PY supports both pushbutton and SPI interfaces with a supply voltage range of 2.4 V ~ 5.5 V, maintaining compatibility with the original ISD2575P power supply specification. ISD4002-120PY supports SPI interface only and requires a narrower supply voltage range (2.7 V ~ 3.3 V), necessitating power supply redesign. ISD4002-120PY offers extended 2-minute recording duration compared to ISD1790PY's maximum 180 seconds.

Q: Does the ISD2575P's 6.4kHz sampling frequency match the substitute parts?

A: ISD1790PY supports configurable sampling frequency from 4 ~ 12kHz, which encompasses the original 6.4kHz specification. ISD4002-120PY operates at a fixed 8kHz sampling frequency. Audio quality and bandwidth characteristics may differ; application-specific testing is necessary to confirm suitability for the intended audio application.

Q: Are the substitute parts RoHS compliant?

A: Yes. Both ISD1790PY and ISD4002-120PY are ROHS3 compliant, addressing the RoHS non-compliance status of the obsolete ISD2575P. This compliance status is relevant for applications subject to RoHS regulations.

Q: What is the impact of the supply voltage range difference?

A: ISD1790PY operates across 2.4 V ~ 5.5 V, which overlaps with the original ISD2575P range (4.5 V ~ 6.5 V) between 4.5 V and 5.5 V. Existing power supplies designed for ISD2575P operation within this overlap range require no modification. ISD4002-120PY requires a narrower 2.7 V ~ 3.3 V supply, incompatible with the original specification and requiring power supply redesign.