CPH6539-TL-H Equivalent & Substitute Parts

Part Overview

The CPH6539-TL-H is a Bipolar (BJT) Transistor Array featuring a dual 2 NPN configuration manufactured by onsemi. This surface mount component is designed for applications requiring moderate current switching and amplification at frequencies up to 500MHz. The part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain functional compatibility within specified electrical and mechanical parameters.

Substiute Parts

CPH6539-TL-H

onsemiIn Stock: 3294CPH6539-TL-H Datasheet

Current PartRFQ

QSX8TR

Rohm SemiconductorIn Stock: 3166QSX8TR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CPH6539-TL-H is determined by the following critical parameters:

Electrical Compatibility Requirements:

• Transistor configuration: Dual 2 NPN topology
• Voltage rating: Minimum 30V Collector Emitter Breakdown
• Current capability: Minimum 1.5A maximum collector current
• Power dissipation: Minimum 1.2W
• Frequency response: Minimum 500MHz transition frequency

Mechanical Compatibility Requirements:

• Surface mount packaging in SOT-23-6 or TSOT-23-6 form factor
• Pin configuration compatible with 6-pin surface mount layout

The QSX8TR from Rohm Semiconductor meets the dual 2 NPN configuration and voltage rating requirements. However, this substitute exhibits reduced maximum collector current (1A versus 1.5A), lower power rating (1.25W versus 1.2W), and reduced transition frequency (320MHz versus 500MHz). These parameter reductions indicate the QSX8TR operates within a narrower performance envelope and is suitable only for applications not requiring the full electrical specifications of the CPH6539-TL-H.

Parameter Comparison

Engineering Selection Recommendations

The QSX8TR serves as an active substitute for the obsolete CPH6539-TL-H within specific application constraints:

Suitable for substitution when:

• Application maximum collector current requirement does not exceed 1A
• Application transition frequency requirement does not exceed 320MHz
• Saturation voltage tolerance permits 350mV operation at specified bias conditions
• Surface mount SOT-23-6 packaging is acceptable

Not suitable for substitution when:

• Application requires collector current operation above 1A
• Application requires transition frequency above 320MHz
• Application requires saturation voltage below 250mV at specified bias conditions

The QSX8TR maintains compliance with REACH regulations and RoHS3 requirements, providing regulatory continuity for applications subject to these standards. Both components share identical moisture sensitivity classification (MSL 1) and operating temperature ratings (150°C TJ), ensuring thermal management compatibility.

Frequently Asked Questions (FAQ)

Q: Can the QSX8TR directly replace the CPH6539-TL-H in all applications?

A: No. The QSX8TR exhibits reduced maximum collector current (1A versus 1.5A) and reduced transition frequency (320MHz versus 500MHz). Substitution is valid only for applications operating within these reduced specifications.

Q: Are the package footprints identical between these components?

A: Both components use SOT-23-6 Thin (TSOT-23-6) surface mount packaging. Pin configuration and mechanical dimensions are compatible for PCB layout purposes.

Q: What is the significance of the saturation voltage difference?

A: The CPH6539-TL-H exhibits 250mV saturation voltage at 15mA base current and 750mA collector current, while the QSX8TR exhibits 350mV at 25mA base current and 500mA collector current. Applications sensitive to saturation voltage performance must account for this 100mV increase when using the QSX8TR.

Q: Does the higher DC current gain of the QSX8TR provide any advantage?

A: The QSX8TR demonstrates higher DC current gain (270 versus 200 at 100mA, 2V). This parameter difference does not offset the reduced current and frequency capabilities and should not be considered a performance advantage for direct substitution.

Q: Are there compliance or regulatory differences between these parts?

A: Both components are REACH Unaffected. The QSX8TR carries RoHS3 Compliant certification, while the CPH6539-TL-H compliance status is not specified in the provided data. For applications requiring RoHS3 compliance, the QSX8TR provides documented regulatory alignment.

Q: What inventory considerations apply to this substitution?

A: The CPH6539-TL-H is classified as obsolete with 3200 pieces in stock. The QSX8TR is active with 3066 pieces in stock, providing long-term supply continuity for new designs or production transitions.