ISD2590S Voice Record/Playback IC Equivalent & Substitute Parts

Part Overview

The ISD2590S is a ChipCorder® voice record/playback interface IC designed for multiple message applications with 90-second recording duration. This component features pushbutton control, automatic gain control, and PWM speaker output, operating across a 4.5V to 6.5V supply range in a 28-SOIC surface mount package.

The ISD2590S is classified as obsolete. Identifying suitable substitute components is necessary to maintain design continuity and ensure component availability for new production runs and system updates.

Substiute Parts

ISD2590S

Nuvoton Technology CorporationIn Stock: 2980ISD2590S Datasheet

Current PartRFQ

ISD1790SY

Nuvoton Technology CorporationIn Stock: 1187ISD1790SY Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ISD2590S 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 compatibility without redesign.

Functional Category: Both components must operate as voice record/playback interface ICs within the ChipCorder® series, supporting multiple message applications.

Interface & Signal Compatibility: The substitute must support pushbutton control and accept analog microphone input signals. Output signal compatibility requires PWM speaker output capability.

Electrical Operating Range: The substitute must operate within or encompass the 0°C to 70°C temperature range. Supply voltage compatibility is evaluated based on overlap with the 4.5V to 6.5V range.

Messaging & Duration: The substitute must support multiple message configurations. Duration capability must meet or exceed the 90-second requirement of the original part.

The ISD1790SY meets all substitution criteria and is classified as an active product with enhanced specifications.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The ISD2590S is obsolete and no longer in production. The ISD1790SY is an active product with current manufacturing support and availability.

Compliance & Certification: The ISD1790SY is ROHS3 compliant, meeting current regulatory requirements for new designs and production environments. The original ISD2590S is RoHS non-compliant, which may present sourcing and regulatory challenges for ongoing production.

Electrical Compatibility: The ISD1790SY operates within a 2.4V to 5.5V supply range. Designs using the ISD2590S at 4.5V to 5.5V will operate within the substitute's specified range. Designs requiring operation above 5.5V will require supply voltage adjustment or circuit redesign.

Functional Equivalence: Both components support pushbutton control, multiple message configurations, and PWM speaker output. The ISD1790SY adds SPI interface capability and volume control, providing enhanced functionality without compromising backward compatibility in pushbutton-only applications.

Package & Mechanical Compatibility: Both components use identical 28-SOIC surface mount packaging, enabling direct PCB substitution without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can the ISD1790SY directly replace the ISD2590S on existing PCBs?

A: Yes, the ISD1790SY uses the same 28-SOIC package and pin configuration as the ISD2590S, enabling direct PCB substitution. However, verify that your supply voltage operates within the 2.4V to 5.5V range of the substitute. Designs operating above 5.5V require circuit modification.

Q: What are the key differences between these two components?

A: The ISD1790SY offers extended recording duration (60–180 seconds versus 90 seconds fixed), wider sampling frequency range (4–12kHz versus 5.3kHz fixed), additional SPI interface support, volume control feature, and lower minimum supply voltage (2.4V versus 4.5V). The ISD1790SY is also ROHS3 compliant and in active production.

Q: Is the ISD1790SY backward compatible with ISD2590S firmware or control logic?

A: Both components support pushbutton control and multiple message operation. The ISD1790SY adds optional SPI interface capability, which is not required for pushbutton-only designs. Existing pushbutton control logic will function without modification.

Q: What is the impact of the different oscillator types?

A: The ISD2590S supports both internal and external oscillator configurations, while the ISD1790SY uses internal oscillator only. If your design requires external oscillator capability, circuit redesign is necessary. For internal oscillator operation, both components are compatible.

Q: Are there any supply voltage considerations for substitution?

A: The ISD2590S operates at 4.5V to 6.5V, while the ISD1790SY operates at 2.4V to 5.5V. The overlap range is 4.5V to 5.5V. If your design operates at 6V or higher, you must adjust the supply voltage or select an alternative component. Operation within 4.5V to 5.5V requires no circuit changes.

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

A: Both the ISD2590S and ISD1790SY are classified as MSL 3, requiring storage at controlled humidity (≤60% RH) for up to 168 hours before soldering. Handling and storage procedures are identical for both components.