RC1587T Equivalent & Substitute Parts

Part Overview

The RC1587T is an obsolete power management IC manufactured by onsemi, designed as a Converter for Intel Pentium® II GTL+ and Pro voltage regulation applications. It is a single-output voltage regulator in TO-220-3 package configuration with input voltage range of 4.5V to 7V and adjustable output voltage from 1.5V to 3.6V. Due to its obsolete product status, equivalent substitute parts are necessary for system redesign, maintenance, or new production requirements where legacy component sourcing is impractical.

Substiute Parts

RC1587T

onsemiIn Stock: 2156RC1587T Datasheet

Current PartRFQ

LMS1587CT-ADJ/NOPB

Texas InstrumentsIn Stock: 1465LMS1587CT-ADJ/NOPB Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RC1587T is determined by the following critical parameters:

• Package Compatibility: TO-220-3 through-hole package ensures mechanical and thermal interface compatibility
• Voltage Input Range: Input voltage specification must accommodate 4.5V to 7V operation
• Voltage Output Range: Output voltage must support adjustable range covering 1.5V to 3.6V minimum
• Number of Outputs: Single output configuration required
• Operating Temperature: 0°C to 125°C operating range must be maintained
• Regulatory Compliance: REACH and RoHS status for modern production environments

The LMS1587CT-ADJ/NOPB from Texas Instruments meets these substitution criteria as an active, compliant alternative with compatible electrical and mechanical specifications.

Parameter Comparison

Engineering Selection Recommendations

The LMS1587CT-ADJ/NOPB is a qualified substitute for the obsolete RC1587T based on the following engineering criteria:

• Package Compatibility: Both devices use TO-220-3 through-hole packaging, ensuring direct mechanical and thermal compatibility without PCB redesign
• Electrical Compatibility: The LMS1587CT-ADJ/NOPB output voltage range (1.25V ~ 11.7V) fully encompasses the RC1587T specification (1.5V ~ 3.6V), providing functional equivalence for existing applications
• Input Voltage Compatibility: The substitute accepts input voltages up to 13V, exceeding the RC1587T requirement of 4.5V ~ 7V
• Thermal and Operating Range: Identical operating temperature range (0°C ~ 125°C) ensures thermal performance equivalence
• Regulatory Compliance: The LMS1587CT-ADJ/NOPB carries ROHS3 compliance and REACH Unaffected status, meeting modern production and environmental requirements
• Active Product Status: Texas Instruments maintains the LMS1587CT-ADJ/NOPB as an active product with ongoing availability and support

Frequently Asked Questions (FAQ)

Q: Can the LMS1587CT-ADJ/NOPB directly replace the RC1587T without circuit modifications?

A: Yes, for applications within the RC1587T's specified voltage ranges (4.5V ~ 7V input, 1.5V ~ 3.6V output). The TO-220-3 package pinout is identical, and the adjustable output voltage range of the substitute fully covers the original specification. No PCB layout changes are required.

Q: What is the primary reason for substitution?

A: The RC1587T is obsolete and no longer manufactured by onsemi. The LMS1587CT-ADJ/NOPB is an active product from Texas Instruments with equivalent electrical and mechanical specifications, ensuring long-term availability and supply chain reliability.

Q: Are there differences in output current capability?

A: The RC1587T output current specification is not provided in the available documentation. The LMS1587CT-ADJ/NOPB is rated for 3A output current. Verify that your application current requirements do not exceed this specification.

Q: Does the substitute meet environmental and compliance requirements?

A: Yes. The LMS1587CT-ADJ/NOPB is ROHS3 compliant and REACH Unaffected, meeting modern environmental and regulatory standards. Both devices have MSL rating of 1 (Unlimited).

Q: What is the voltage dropout specification for the substitute?

A: The LMS1587CT-ADJ/NOPB has a maximum dropout voltage of 1.3V at 3A output current. This specification was not provided for the RC1587T.

Q: Are there alternative substitutes available?

A: The LMS1587CT-ADJ and LT1587CT#PBF are listed as additional substitutes for the LMS1587CT-ADJ/NOPB. Verify compatibility with your specific application requirements and voltage specifications.