ISD2575SY Equivalent & Substitute Parts

Part Overview

The ISD2575SY is a voice record/playback IC from Nuvoton Technology Corporation's ChipCorder® series, designed for multiple message applications with 75 seconds of recording/playback duration. This component features pushbutton interface control, automatic gain control, and operates across a 4.5V to 6.5V supply range. The device is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.

Substiute Parts

ISD2575SY

Nuvoton Technology CorporationIn Stock: 1038ISD2575SY Datasheet

Current PartRFQ

ISD1790SY

Nuvoton Technology CorporationIn Stock: 1187ISD1790SY Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The ISD1790SY qualifies as a manufacturer-recommended substitute for the ISD2575SY based on the following substitution criteria:

Mechanical Compatibility: Both devices utilize identical 28-SOIC packaging (0.295", 7.50mm width), enabling direct PCB footprint compatibility without layout modifications.

Functional Core: Both are ChipCorder® series voice record/playback ICs from Nuvoton Technology Corporation with multiple message capability, analog microphone input, and automatic gain control functionality.

Interface Compatibility: The ISD1790SY maintains pushbutton interface control present in the ISD2575SY while adding SPI interface capability for enhanced system integration flexibility.

Key Differentiators: The ISD1790SY provides extended recording duration (60–180 seconds versus 75 seconds), wider sampling frequency range (4–12kHz versus fixed 6.4kHz), lower supply voltage requirement (2.4–5.5V versus 4.5–6.5V), and active product status with RoHS3 compliance. The ISD1790SY is actively manufactured and supported, addressing the obsolescence status of the ISD2575SY.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement: The ISD1790SY is the manufacturer-recommended substitute and provides identical mechanical compatibility through matching 28-SOIC packaging. The active product status and RoHS3 compliance of the ISD1790SY address the obsolescence of the ISD2575SY, ensuring long-term supply chain viability and regulatory alignment.

Supply Voltage Consideration: The ISD1790SY operates across 2.4V to 5.5V, which overlaps with but extends below the ISD2575SY's 4.5V to 6.5V range. Systems designed for the ISD2575SY operating at 4.5V to 5.5V will function with the ISD1790SY without modification. Systems requiring operation above 5.5V must verify compatibility with the ISD1790SY's upper limit.

Compliance Status: The ISD1790SY carries ROHS3 compliance certification, supporting modern regulatory requirements. Both devices maintain REACH Unaffected status and identical ECCN/HTSUS classifications.

Frequently Asked Questions (FAQ)

Q: Can the ISD1790SY replace the ISD2575SY in existing designs without PCB modification?

A: Yes. Both devices use identical 28-SOIC packaging with matching pin configurations, enabling direct footprint compatibility. No PCB layout changes are required for mechanical substitution.

Q: What are the key functional differences between these devices?

A: The ISD1790SY provides extended recording duration (60–180 seconds versus 75 seconds), configurable sampling frequency (4–12kHz versus fixed 6.4kHz), additional SPI interface capability, volume control feature, and lower minimum supply voltage (2.4V versus 4.5V). Both maintain pushbutton interface control and automatic gain control.

Q: Is the ISD1790SY suitable for systems operating at the ISD2575SY's maximum supply voltage?

A: The ISD1790SY operates to 5.5V maximum, while the ISD2575SY operates to 6.5V. Systems designed to operate at 5.5V or below are fully compatible. Systems requiring operation above 5.5V require alternative solutions.

Q: What is the impact of the ISD2575SY's obsolete status?

A: Obsolete status indicates the manufacturer has discontinued production and support. The ISD1790SY's active status ensures ongoing availability, technical support, and supply chain continuity for new designs and system maintenance.

Q: Are there packaging or moisture sensitivity considerations for substitution?

A: Both devices use surface mount 28-SOIC packaging. The ISD1790SY has MSL 3 (168 hours) versus the ISD2575SY's MSL 1 (unlimited), requiring standard moisture control during storage and handling per IPC standards.