ISD2590P Equivalent & Substitute Parts

Part Overview

The ISD2590P is a voice record/playback IC from Nuvoton Technology Corporation's ChipCorder® series, designed for multiple message applications with 90-second recording and playback duration. This component features pushbutton interface control, analog microphone input, and PWM speaker output capabilities. The ISD2590P is classified as obsolete, making identification of compatible substitute components essential for ongoing system support and new design implementations.

Substiute Parts

ISD2590P

Nuvoton Technology CorporationIn Stock: 1725ISD2590P Datasheet

Current PartRFQ

ISD1790PY

Nuvoton Technology CorporationIn Stock: 1353ISD1790PY Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The ISD1790PY qualifies as a manufacturer-recommended substitute for the ISD2590P based on the following substitution criteria:

Common Electrical & Mechanical Parameters:

• Identical package format: 28-DIP (0.600", 15.24mm) with through-hole mounting
• Same manufacturer: Nuvoton Technology Corporation, ChipCorder® series
• Compatible interface architecture: Pushbutton control with SPI capability
• Matching input signal type: Analog - Single Ended, Microphone
• Compatible output signal: PWM Speaker Output (with additional analog output option)
• Overlapping supply voltage range: ISD1790PY operates 2.4 V ~ 5.5 V, encompassing the ISD2590P requirement of 4.5 V ~ 6.5 V within the 4.5 V ~ 5.5 V overlap window
• Identical operating temperature range: 0°C ~ 70°C (TA)
• Matching messaging capability: Multiple message support
• Same moisture sensitivity classification: MSL 1 (Unlimited)

Key Differentiators: The ISD1790PY provides extended recording duration (60 ~ 180 Sec versus 90 Sec fixed), variable sampling frequency (4 ~ 12kHz versus fixed 5.3kHz), and enhanced features including volume control. The ISD1790PY maintains active product status with RoHS3 compliance, addressing obsolescence concerns of the ISD2590P.

Parameter Comparison

Engineering Selection Recommendations

Substitution Feasibility: The ISD1790PY is a direct substitute for the ISD2590P in applications requiring voice record/playback functionality with pushbutton interface control. Both components share identical 28-DIP package geometry, through-hole mounting, and core signal characteristics (analog microphone input, PWM speaker output).

Compliance Considerations: The ISD2590P is RoHS non-compliant and obsolete. The ISD1790PY is RoHS3 compliant and maintains active product status, making it the appropriate choice for new designs and systems requiring regulatory compliance. Both components are REACH Unaffected and classified under ECCN EAR99.

Supply Voltage Compatibility: Design implementations operating within the 4.5 V ~ 5.5 V range will function with both components. Systems requiring the full 5.5 V ~ 6.5 V range of the ISD2590P must be evaluated for compatibility with the ISD1790PY's maximum 5.5 V specification.

Functional Enhancement: The ISD1790PY provides configurable recording duration (60 ~ 180 Sec) and variable sampling frequency (4 ~ 12kHz), offering design flexibility beyond the ISD2590P's fixed 90-second, 5.3kHz specification. The addition of SPI interface capability and volume control represents functional enhancement without compromising backward compatibility for pushbutton-only implementations.

Frequently Asked Questions (FAQ)

Q: Can the ISD1790PY directly replace the ISD2590P in existing PCB designs? A: Yes. Both components use identical 28-DIP package geometry with matching pin assignments for core functionality (pushbutton interface, microphone input, speaker output). PCB layouts designed for the ISD2590P will accommodate the ISD1790PY without modification.

Q: What is the voltage compatibility window for substitution? A: Both components operate within the 4.5 V ~ 5.5 V range. The ISD2590P supports 4.5 V ~ 6.5 V, while the ISD1790PY supports 2.4 V ~ 5.5 V. Systems designed for 5.5 V ~ 6.5 V operation require circuit redesign to use the ISD1790PY.

Q: Does the ISD1790PY require different firmware or software configuration? A: The ISD1790PY adds SPI interface capability and volume control features not present in the ISD2590P. Pushbutton-only implementations will function identically. Applications utilizing SPI or volume control require firmware updates to access these features.

Q: What is the significance of the RoHS compliance difference? A: The ISD2590P is RoHS non-compliant (obsolete), while the ISD1790PY is RoHS3 compliant. New designs and systems subject to RoHS regulations must use the ISD1790PY. Existing systems using the ISD2590P may continue operation without regulatory impact.

Q: Are there differences in recording quality between the two components? A: The ISD2590P operates at fixed 5.3kHz sampling with 2.3kHz filter pass band. The ISD1790PY provides variable sampling (4 ~ 12kHz), allowing optimization for specific audio quality requirements. Applications requiring the exact 5.3kHz specification must configure the ISD1790PY accordingly.

Q: What is the packaging difference between the two components? A: Both components use 28-DIP (0.600", 15.24mm) through-hole packages. The ISD2590P was supplied in standard packaging, while the ISD1790PY is supplied in tube packaging. This difference does not affect electrical or mechanical compatibility.