ISD2548P Equivalent & Substitute Parts

Part Overview

The ISD2548P is a voice record/playback IC from Nuvoton Technology Corporation's ChipCorder® series, designed for multiple message applications with 48-second recording and playback duration. This device features pushbutton interface control, analog microphone input, and PWM speaker output with automatic gain control. The ISD2548P is classified as obsolete, making identification of compatible substitute components essential for ongoing system support and new design implementations.

Substiute Parts

ISD2548P

Nuvoton Technology CorporationIn Stock: 923ISD2548P Datasheet

Current PartRFQ

ISD1750PY

Nuvoton Technology CorporationIn Stock: 1564ISD1750PY Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The ISD1750PY qualifies as a direct substitute for the ISD2548P based on the following substitution criteria:

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

Functional Compatibility: Both are voice record/playback ICs from the ChipCorder® series with multiple message capability, pushbutton interface control, analog microphone input, and PWM speaker output with automatic gain control.

Electrical Interface Compatibility: Both accept analog single-ended microphone input and provide PWM speaker output, maintaining signal chain compatibility with existing audio front-end and amplification circuits.

Supply Voltage Overlap: The ISD1750PY supply range (2.4 V ~ 5.5 V) encompasses the ISD2548P operating range (4.5 V ~ 6.5 V) within the 4.5 V ~ 5.5 V overlap window, permitting operation in systems designed for the original component.

Operating Temperature Range: Both devices operate across 0°C ~ 70°C (TA), maintaining thermal compatibility.

Regulatory Compliance: The ISD1750PY is ROHS3 compliant and REACH unaffected, addressing modern regulatory requirements that the obsolete ISD2548P does not meet.

Parameter Comparison

Engineering Selection Recommendations

The ISD1750PY is the qualified substitute for the ISD2548P based on the following engineering criteria:

Mechanical Fit: Identical 28-DIP package ensures direct PCB compatibility without redesign.

Functional Equivalence: Both devices perform voice record/playback with multiple message capability and pushbutton control, maintaining system functionality.

Electrical Compatibility: The 4.5 V ~ 5.5 V supply voltage overlap permits operation in systems originally designed for the ISD2548P within this voltage window. Systems requiring operation above 5.5 V require supply circuit modification.

Active Product Status: The ISD1750PY is actively manufactured by Nuvoton, ensuring long-term availability and supply chain continuity compared to the obsolete ISD2548P.

Regulatory Compliance: The ISD1750PY achieves ROHS3 compliance, addressing regulatory requirements for new designs and systems subject to RoHS directives.

Enhanced Capabilities: The ISD1750PY provides extended recording duration (33 ~ 100 Sec versus 48 Sec), wider sampling frequency range (4 ~ 12kHz versus 5.3kHz), SPI interface option, analog output capability, and volume control, offering functional improvements over the original component.

Frequently Asked Questions (FAQ)

Q: Can the ISD1750PY directly replace the ISD2548P without PCB modifications?

A: Yes. Both devices use identical 28-DIP (0.600", 15.24mm) through-hole packaging. Direct pin-for-pin substitution is possible without PCB layout changes.

Q: What is the supply voltage compatibility between these devices?

A: The ISD2548P operates at 4.5 V ~ 6.5 V, while the ISD1750PY operates at 2.4 V ~ 5.5 V. The overlap range is 4.5 V ~ 5.5 V. Systems operating at 5.5 V or below can use the ISD1750PY without modification. Systems requiring operation above 5.5 V require supply circuit redesign.

Q: Does the ISD1750PY support the same pushbutton interface as the ISD2548P?

A: Yes. The ISD1750PY supports pushbutton interface control identical to the ISD2548P. Additionally, the ISD1750PY provides SPI interface capability for applications requiring digital control.

Q: What are the key differences in recording duration?

A: The ISD2548P provides fixed 48-second duration. The ISD1750PY provides configurable duration from 33 to 100 seconds, offering flexibility for applications with varying message length requirements.

Q: Is the ISD1750PY suitable for new product designs?

A: Yes. The ISD1750PY is an active product with ROHS3 compliance, making it appropriate for new designs. The ISD2548P is obsolete and should not be used in new designs.

Q: Are there any firmware or software changes required when substituting the ISD1750PY for the ISD2548P?

A: Firmware compatibility depends on specific application implementation. Both devices share the same pushbutton interface and signal types (analog microphone input, PWM speaker output). Applications using only pushbutton control and standard audio I/O typically require no firmware changes. Applications utilizing SPI interface or advanced features of the ISD1750PY require firmware updates to access these capabilities.