CPH6538-TL-H Equivalent & Substitute Parts

Part Overview

The CPH6538-TL-H is a Bipolar (BJT) Transistor Array featuring a dual 2 NPN configuration manufactured by onsemi. This surface mount component is rated for 30V collector-emitter breakdown voltage with a maximum collector current of 700mA and 600mW power dissipation. The device is classified as obsolete, making identification of equivalent and substitute parts essential for ongoing design support and production continuity. Substitute parts must maintain functional compatibility across critical electrical parameters including voltage ratings, current capacity, and thermal characteristics while accommodating packaging and availability constraints.

Substiute Parts

CPH6538-TL-H

onsemiIn Stock: 16323CPH6538-TL-H Datasheet

Current PartRFQ

QSX8TR

Rohm SemiconductorIn Stock: 3166QSX8TR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CPH6538-TL-H is determined by strict equivalence across the following critical parameters:

Mandatory Matching Criteria:

• Transistor configuration: 2 NPN (Dual) topology
• Voltage rating: Collector-emitter breakdown voltage of 30V or greater
• Current capacity: Collector current rating of 700mA or greater
• Package type: SOT-23-6 Thin or TSOT-23-6 surface mount configuration
• Thermal capability: Operating temperature rating of 150°C or higher

Allowable Parameter Variations:

• Maximum collector current may exceed 700mA
• Maximum power dissipation may exceed 600mW
• Transition frequency may differ from 540MHz
• DC current gain (hFE) specifications may vary within device characterization ranges
• Vce saturation characteristics may differ

The QSX8TR from Rohm Semiconductor satisfies all mandatory matching criteria and qualifies as a direct substitute for the CPH6538-TL-H.

Parameter Comparison

Engineering Selection Recommendations

CPH6538-TL-H (onsemi):

• Product Status: Obsolete
• REACH Status: REACH Unaffected
• Moisture Sensitivity Level: 1 (Unlimited)
• Availability: 16,260 pieces in stock

The CPH6538-TL-H is classified as obsolete and should not be selected for new designs. Existing inventory may support legacy production requirements with limited shelf life considerations.

QSX8TR (Rohm Semiconductor):

• Product Status: Active
• RoHS Status: ROHS3 Compliant
• REACH Status: REACH Unaffected
• Moisture Sensitivity Level: 1 (Unlimited)
• Availability: 3,066 pieces in stock

The QSX8TR is an active product with current manufacturing support and RoHS3 compliance certification. This part is suitable for new designs and ongoing production. The QSX8TR provides enhanced electrical performance with higher current capacity (1A versus 700mA) and greater power dissipation capability (1.25W versus 600mW), making it compatible with applications requiring the CPH6538-TL-H specifications while offering improved design margins.

Frequently Asked Questions (FAQ)

Q: Can the QSX8TR directly replace the CPH6538-TL-H in existing circuit designs?

A: Yes. The QSX8TR meets all mandatory electrical and mechanical compatibility criteria. Both devices feature identical 30V voltage ratings, matching SOT-23-6 surface mount packaging, and equivalent thermal operating ranges. The QSX8TR provides equal or superior performance across all critical parameters.

Q: What is the significance of the QSX8TR having higher current and power ratings?

A: The QSX8TR's 1A maximum collector current and 1.25W power dissipation exceed the CPH6538-TL-H specifications of 700mA and 600mW respectively. These higher ratings provide additional design margin and thermal headroom without introducing compatibility issues. Circuits designed for the CPH6538-TL-H operate within the QSX8TR's rated envelope.

Q: Does the lower transition frequency of the QSX8TR (320MHz versus 540MHz) affect substitution suitability?

A: The transition frequency difference does not prevent substitution. The QSX8TR's 320MHz transition frequency remains suitable for applications originally designed around the CPH6538-TL-H's 540MHz specification. Frequency-dependent circuit performance should be evaluated within the context of specific application requirements, but the lower frequency does not create incompatibility for standard switching applications.

Q: Are there packaging considerations when substituting these parts?

A: Both the CPH6538-TL-H and QSX8TR use SOT-23-6 Thin (TSOT-23-6) surface mount packaging. Pin configurations and footprints are identical, allowing direct PCB layout compatibility without redesign.

Q: What compliance certifications should be considered for new designs?

A: The QSX8TR carries RoHS3 compliance certification, making it suitable for applications subject to RoHS directives. Both parts maintain REACH Unaffected status and unlimited moisture sensitivity level (MSL 1), indicating no special handling requirements during storage or assembly.

Q: Why is the CPH6538-TL-H classified as obsolete?

A: Obsolete classification indicates that onsemi has discontinued active manufacturing and support for this device. While existing inventory remains available, the QSX8TR from Rohm Semiconductor provides an active, supported alternative with equivalent functionality and enhanced performance characteristics.