ISL99202IRTAZ Equivalent & Substitute Parts

Part Overview

The ISL99202IRTAZ is a Class AB stereo headphone amplifier IC manufactured by Renesas Electronics Corporation, designed for 2-channel audio applications with 70mW output power per channel at 16Ω load impedance. The device operates across a 2.4V to 5.5V supply voltage range and integrates depop, short-circuit, and thermal protection features with shutdown capability. The ISL99202IRTAZ is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design support and production requirements. Substitute parts must maintain compatibility with the 12-TQFN (3x3) package format and preserve core amplifier functionality for headphone-driven applications.

Key Parameters

Parameter	ISL99202IRTAZ
Manufacturer	Renesas Electronics Corporation
Category	Linear, Amplifiers
Type	Class AB
Output Type	Headphones, 2-Channel (Stereo)
Max Output Power x Channels @ Load	70mW x 2 @ 16Ω
Voltage - Supply	2.4V ~ 5.5V
Features	Depop, Short-Circuit and Thermal Protection, Shutdown
Mounting Type	Surface Mount
Operating Temperature	-40°C ~ 85°C (TA)
Supplier Device Package	12-TQFN (3x3)
Package / Case	12-WFQFN Exposed Pad
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
REACH Status	REACH Unaffected
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitute parts for the ISL99202IRTAZ are selected based on strict electrical and mechanical compatibility criteria. The primary substitution parameters are:

Critical Matching Parameters:

Amplifier Type: Class AB stereo headphone amplifier
Package Format: 12-TQFN (3x3) with exposed pad
Output Configuration: 2-channel (stereo) headphone driver
Protection Features: Depop, short-circuit, and thermal protection with shutdown
Operating Temperature Range: -40°C to 85°C
Regulatory Compliance: ROHS3 compliant, REACH unaffected

Secondary Compatibility Parameters:

Supply Voltage Range: Minimum 2.4V to 5.5V maximum (substitute ranges must overlap)
Output Power Capability: Minimum 60mW per channel at specified load impedance
Mounting Type: Surface mount
Moisture Sensitivity: MSL 1 (unlimited)

The Analog Devices Inc./Maxim Integrated MAX9724 and MAX9728 series devices meet these criteria across multiple product variants. Substitution is valid when the substitute part maintains the same package footprint, protection feature set, and operating temperature range, with supply voltage ranges that encompass the original specification or provide adequate overlap for the target application.

Parameter Comparison

Parameter	ISL99202IRTAZ	MAX9724AETC+	MAX9724AETC+T	MAX9724BETC+	MAX9724BETC+T	MAX9728AETC+	MAX9728AETC+T
Manufacturer	Renesas	Analog Devices/Maxim	Analog Devices/Maxim	Analog Devices/Maxim	Analog Devices/Maxim	Analog Devices/Maxim	Analog Devices/Maxim
Type	Class AB	Class AB	Class AB	Class AB	Class AB	Class AB	Class AB
Output Type	Headphones, 2-Channel (Stereo)	Headphones, 2-Channel (Stereo)	Headphones, 2-Channel (Stereo)	Headphones, 2-Channel (Stereo)	Headphones, 2-Channel (Stereo)	Headphones, 2-Channel (Stereo)	Headphones, 2-Channel (Stereo)
Max Output Power x Channels @ Load	70mW x 2 @ 16Ω	63mW x 2 @ 32Ω	63mW x 2 @ 32Ω	63mW x 2 @ 32Ω	63mW x 2 @ 32Ω	60mW x 2 @ 32Ω	60mW x 2 @ 32Ω
Voltage - Supply	2.4V ~ 5.5V	2.7V ~ 5.5V	2.7V ~ 5.5V	2.7V ~ 5.5V	2.7V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V
Features	Depop, Short-Circuit and Thermal Protection, Shutdown	Depop, Short-Circuit and Thermal Protection, Shutdown	Depop, Short-Circuit and Thermal Protection, Shutdown	Depop, Short-Circuit and Thermal Protection, Shutdown	Depop, Short-Circuit and Thermal Protection, Shutdown	Depop, Short-Circuit and Thermal Protection, Shutdown	Depop, Short-Circuit and Thermal Protection, Shutdown
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Operating Temperature	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)
Supplier Device Package	12-TQFN (3x3)	12-TQFN (3x3)	12-TQFN (3x3)	12-TQFN (3x3)	12-TQFN (3x3)	12-TQFN (3x3)	12-TQFN (3x3)
Package / Case	12-WFQFN Exposed Pad	12-WFQFN Exposed Pad	12-WFQFN Exposed Pad	12-WFQFN Exposed Pad	12-WFQFN Exposed Pad	12-WFQFN Exposed Pad	12-WFQFN Exposed Pad
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected
Product Status	Obsolete	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

Primary Substitutes (Recommended for New Designs):

The MAX9724AETC+T and MAX9724BETC+T variants are the preferred substitutes for the ISL99202IRTAZ. Both devices are classified as active products with full production support from Analog Devices Inc./Maxim Integrated. These parts maintain identical package geometry (12-WFQFN exposed pad), operating temperature range (-40°C to 85°C), and protection feature set. The MAX9724 series operates across a 2.7V to 5.5V supply range, which overlaps the original 2.4V to 5.5V specification. Output power is specified at 63mW per channel at 32Ω load impedance, providing adequate performance for stereo headphone applications. Both variants carry ROHS3 compliance and REACH unaffected status, meeting regulatory requirements equivalent to the original part.

Secondary Substitutes (Alternative Options):

The MAX9728AETC+ and MAX9728AETC+T variants provide functional substitution with reduced supply voltage flexibility. These devices operate across a narrower 4.5V to 5.5V range and deliver 60mW per channel at 32Ω load impedance. Selection of MAX9728 variants is appropriate for applications with fixed supply voltages within the 4.5V to 5.5V window. Both MAX9728 variants maintain active product status and full regulatory compliance.

Packaging Considerations:

The MAX9724BETC+T and MAX9728AETC+T variants are supplied in Tape & Reel (TR) packaging format, suitable for automated assembly processes. The MAX9724AETC+ and MAX9724BETC+ variants are supplied without specified packaging format. Selection between tape & reel and alternative packaging formats depends on production volume and assembly methodology requirements.

Regulatory and Compliance Status:

All substitute parts maintain ROHS3 compliance and REACH unaffected status, ensuring compatibility with current environmental and regulatory frameworks. The transition from the obsolete ISL99202IRTAZ to active Analog Devices/Maxim alternatives provides access to ongoing manufacturer support, updated documentation, and continued production availability.

Frequently Asked Questions (FAQ)

Q: Can the MAX9724 series directly replace the ISL99202IRTAZ in existing PCB designs?

A: Yes, the MAX9724 series devices are pin-compatible and package-compatible substitutes. Both the ISL99202IRTAZ and MAX9724 variants use the 12-WFQFN exposed pad package with identical footprint dimensions. No PCB layout modifications are required for mechanical compatibility. Electrical compatibility is maintained through equivalent protection features, operating temperature range, and stereo headphone amplifier functionality.

Q: What is the difference between MAX9724AETC+ and MAX9724AETC+T?

A: The primary difference is packaging format. The MAX9724AETC+ is supplied in standard packaging, while the MAX9724AETC+T is supplied in Tape & Reel (TR) format. Both variants are electrically identical, with identical electrical specifications, performance characteristics, and active product status. Selection depends on production assembly requirements and volume considerations.

Q: Why does the MAX9724 specify output power at 32Ω load while the ISL99202IRTAZ specifies 70mW at 16Ω?

A: Output power specifications are load-dependent. The ISL99202IRTAZ is rated at 70mW per channel into a 16Ω load impedance, while the MAX9724 is rated at 63mW per channel into a 32Ω load impedance. These represent different measurement conditions. For 16Ω headphone applications, the MAX9724 will deliver higher absolute power output than the specified 63mW rating due to the lower load impedance. Actual performance in 16Ω applications requires consultation of detailed electrical characteristics in the MAX9724 datasheet.

Q: Is the MAX9728 series suitable as a substitute for the ISL99202IRTAZ?

A: The MAX9728 series provides functional substitution with a critical limitation: the supply voltage range is restricted to 4.5V to 5.5V, compared to the original 2.4V to 5.5V specification. The MAX9728 is appropriate only for applications with fixed supply voltages within the 4.5V to 5.5V window. If the design requires operation below 4.5V supply voltage, the MAX9724 series is the correct substitute. Both MAX9728 variants maintain active product status and full regulatory compliance.

Q: Are all substitute parts ROHS3 compliant?

A: Yes, all substitute parts listed (MAX9724AETC+, MAX9724AETC+T, MAX9724BETC+, MAX9724BETC+T, MAX9728AETC+, MAX9728AETC+T) are ROHS3 compliant and REACH unaffected. Regulatory compliance is maintained across all variants.

Q: What is the significance of the "B" and "C" designations in the MAX9724 part numbers?

A: The letter designations (A, B, C) in the MAX9724 series represent different performance grades or manufacturing revisions. The MAX9724AETC+ and MAX9724BETC+ variants both operate across 2.7V to 5.5V supply range and deliver 63mW per channel at 32Ω load. The MAX9724CETC+ and MAX9724CETC+T variants operate across a slightly lower 2.5V to 5.5V range and are classified as obsolete. For new designs, the MAX9724AETC+ or MAX9724BETC+ variants are recommended.

Q: Can I use the MAX9724BETC+T in high-volume production?

A: Yes, the MAX9724BETC+T is supplied in Tape & Reel (TR) packaging format with 88,650 pieces currently in stock, making it suitable for high-volume automated assembly processes. The TR packaging format is optimized for pick-and-place equipment and provides efficient handling for large production runs.

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