ISD2575PY Equivalent & Substitute Parts

Part Overview

The ISD2575PY 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. The device features pushbutton interface control, automatic gain control, and PWM speaker output, operating from 4.5V to 6.5V supply voltage in a 28-DIP through-hole package.

The ISD2575PY is classified as obsolete. Locating equivalent or substitute components is necessary for new designs, production continuity, or system upgrades where this part is no longer readily available or supported.

Substiute Parts

ISD2575PY

Nuvoton Technology CorporationIn Stock: 5811ISD2575PY 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 ISD2575PY based on the following substitution criteria:

Mechanical Compatibility: Both devices use identical 28-DIP (0.600", 15.24mm) through-hole packaging, ensuring direct PCB footprint compatibility without layout modifications.

Functional Compatibility: Both are ChipCorder® series voice record/playback ICs with multiple message capability, pushbutton interface control, and automatic gain control. The ISD1790PY extends functionality with SPI interface and volume control options.

Electrical Operating Range: The ISD1790PY supply voltage range (2.4V ~ 5.5V) encompasses the ISD2575PY operating range (4.5V ~ 6.5V) within the 4.5V ~ 5.5V overlap window, permitting operation in designs using 5V supply rails.

Signal Compatibility: Both devices accept analog single-ended microphone input and provide PWM speaker output, maintaining signal chain compatibility.

Duration and Sampling: The ISD1790PY supports 60 ~ 180 second duration range with 4 ~ 12kHz sampling frequency, which encompasses the ISD2575PY's 75-second duration at 6.4kHz sampling rate.

Parameter Comparison

Engineering Selection Recommendations

The ISD1790PY is the manufacturer-recommended substitute for the ISD2575PY. Selection of the ISD1790PY is supported by the following factors:

Product Status: The ISD1790PY maintains active product status with ongoing manufacturer support, ensuring availability and technical documentation continuity compared to the obsolete ISD2575PY.

Regulatory Compliance: The ISD1790PY is ROHS3 compliant, meeting current environmental and hazardous substance restrictions. Both devices are REACH unaffected and carry EAR99 ECCN classification.

Packaging and Pinout: Identical 28-DIP through-hole package enables direct replacement without PCB redesign or layout modifications.

Functional Scope: The ISD1790PY provides extended recording duration (60 ~ 180 seconds versus 75 seconds) and additional interface options (SPI in addition to pushbutton), offering design flexibility for future system enhancements without component change.

Supply Voltage Consideration: Designs operating at 5V supply voltage fall within the compatible range of both devices. Designs requiring operation above 5.5V must retain the ISD2575PY or redesign the supply voltage architecture.

Frequently Asked Questions (FAQ)

Q: Can the ISD1790PY directly replace the ISD2575PY in existing designs?

A: Yes, for designs operating at 4.5V to 5.5V supply voltage. The ISD1790PY uses the same 28-DIP package and pinout, accepts identical microphone input signals, and provides PWM speaker output. No PCB modifications are required. Designs operating above 5.5V require the original ISD2575PY or supply voltage redesign.

Q: What are the key differences between these devices?

A: The ISD1790PY extends recording duration to 180 seconds (versus 75 seconds), adds SPI interface capability alongside pushbutton control, includes volume control, and supports variable sampling frequency (4 ~ 12kHz versus fixed 6.4kHz). The ISD1790PY is active product status while the ISD2575PY is obsolete.

Q: Are there pin-for-pin compatibility concerns?

A: Both devices use the 28-DIP package with identical mechanical dimensions (0.600", 15.24mm). Pinout compatibility is maintained for the core voice record/playback functionality. Consult device datasheets for detailed pin assignments if SPI interface utilization is planned.

Q: What supply voltage range should be used for substitution?

A: For reliable substitution, operate at 5V nominal supply voltage, which falls within both devices' specified ranges. The ISD2575PY supports 4.5V ~ 6.5V; the ISD1790PY supports 2.4V ~ 5.5V. The overlap range is 4.5V ~ 5.5V.

Q: Does the ISD1790PY maintain the same filter pass band characteristics?

A: The ISD2575PY specifies 2.7kHz filter pass band. The ISD1790PY does not specify a fixed filter pass band value in the provided parameters. Consult the ISD1790PY datasheet for detailed filter specifications if audio frequency response is a critical design parameter.

Q: Are there moisture sensitivity or handling differences?

A: Both devices carry MSL 1 (Unlimited) moisture sensitivity level, indicating no special moisture control requirements during storage or handling.