ISD1790EY Voice Record/Playback IC Equivalent & Substitute Parts

Part Overview

The ISD1790EY is a ChipCorder® voice record/playback interface IC manufactured by Nuvoton Technology Corporation, designed for multiple message applications with recording and playback durations of 60 to 180 seconds. The device features pushbutton and SPI control interfaces, analog single-ended microphone input, and PWM speaker output with integrated automatic gain control and volume control.

The ISD1790EY is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure component availability, and support ongoing production and maintenance requirements for systems utilizing this voice recording technology.

Substiute Parts

ISD1790EY

Nuvoton Technology CorporationIn Stock: 721ISD1790EY Datasheet

Current PartRFQ

ISD1790SY

Nuvoton Technology CorporationIn Stock: 1187ISD1790SY Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ISD1790EY is determined by strict equivalence across the following critical parameters:

• Functional Equivalence: Identical voice record/playback capability with multiple message support, 60–180 second duration range, and 4–12 kHz sampling frequency
• Interface Compatibility: Matching pushbutton and SPI control interfaces
• Signal Specifications: Identical analog single-ended microphone input and PWM speaker output characteristics
• Electrical Specifications: Matching supply voltage range (2.4 V ~ 5.5 V) and operating temperature range (0°C ~ 70°C)
• Integrated Features: Automatic gain control and volume control functionality
• Regulatory Compliance: REACH Unaffected status and EAR99 ECCN classification
• Packaging Compatibility: Surface mount technology with appropriate package dimensions for PCB integration

The ISD1790SY meets all substitution criteria as a direct equivalent, with the primary distinction being package type (28-SOIC versus 28-TSOP) and product status (Active versus Obsolete).

Parameter Comparison

Engineering Selection Recommendations

The ISD1790SY is a direct functional equivalent to the ISD1790EY and is the recommended substitute for new designs and ongoing production support. Selection of the ISD1790SY is justified by the following factors:

• Product Status: The ISD1790SY maintains Active product status, ensuring continued manufacturer support, availability, and supply chain reliability compared to the Obsolete ISD1790EY
• Regulatory Compliance: The ISD1790SY is ROHS3 Compliant, providing enhanced environmental and regulatory alignment for systems subject to modern compliance requirements
• Functional Parity: All electrical, signal, and operational parameters are identical to the ISD1790EY, ensuring drop-in compatibility at the functional level
• Package Consideration: The ISD1790SY uses a 28-SOIC package (7.50mm width) compared to the 28-TSSOP package (11.80mm width) of the ISD1790EY. PCB layout modifications are required to accommodate the different package footprint

Frequently Asked Questions (FAQ)

Q: Can the ISD1790SY be used as a direct replacement for the ISD1790EY without circuit modifications?

A: The ISD1790SY is functionally equivalent and electrically compatible with the ISD1790EY. However, the package type differs (28-SOIC versus 28-TSSOP), requiring PCB footprint and layout modifications. Pin configuration and electrical characteristics remain identical.

Q: What is the primary difference between the ISD1790EY and ISD1790SY?

A: The primary differences are package type (28-TSSOP for ISD1790EY versus 28-SOIC for ISD1790SY), product status (Obsolete versus Active), and RoHS compliance status (not specified versus ROHS3 Compliant). All functional and electrical parameters are identical.

Q: Why is the ISD1790EY classified as Obsolete?

A: The ISD1790EY has reached end-of-life status with Nuvoton Technology Corporation. The ISD1790SY represents the active continuation of this product line and is the recommended alternative for new designs and production continuity.

Q: Are there any compatibility concerns when substituting the ISD1790SY for the ISD1790EY?

A: Compatibility is maintained at the functional and electrical level. The primary consideration is PCB layout compatibility due to package differences. Pin assignments and electrical specifications are identical, ensuring signal and control interface compatibility.

Q: What packaging format is the ISD1790SY supplied in?

A: The ISD1790SY is supplied in Tube packaging, compared to the ISD1790EY which uses standard packaging. Both devices maintain identical MSL (Moisture Sensitivity Level) ratings of 3 (168 Hours).

Q: Is the ISD1790SY suitable for applications requiring ROHS compliance?

A: Yes, the ISD1790SY is ROHS3 Compliant, making it suitable for applications and markets requiring RoHS environmental compliance. The ISD1790EY RoHS status is not specified.