RC1585T Equivalent & Substitute Parts

Part Overview

The RC1585T is a Power Management IC (PMIC) voltage converter designed for Intel Pentium II GTL+ and Pro applications. Manufactured by onsemi, this device functions as a single-output voltage regulator in a TO-220-3 package. The RC1585T is classified as obsolete, making equivalent substitute parts necessary for new designs, maintenance, and production continuity. The part accepts input voltages between 4.6V and 7V and provides adjustable output voltage ranging from 1.5V to 3.6V, operating across the industrial temperature range of 0°C to 125°C.

Substiute Parts

RC1585T

onsemiIn Stock: 1567RC1585T Datasheet

Current PartRFQ

LT1585CT#PBF

Analog Devices Inc.In Stock: 1610LT1585CT#PBF Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RC1585T are identified based on the following critical parameters that determine functional compatibility:

• Package Type: TO-220-3 (identical physical form factor required for direct board-level replacement)
• Input Voltage Range: 4.6V ~ 7V (substitute must accept this voltage window)
• Output Voltage Range: 1.5V ~ 3.6V (substitute must support this output voltage window)
• Number of Outputs: 1 (single-output configuration)
• Operating Temperature Range: 0°C ~ 125°C (industrial temperature specification)
• Mounting Type: Through Hole (PCB assembly compatibility)
• Regulatory Compliance: REACH Unaffected status (environmental compliance alignment)

The LT1585CT#PBF from Analog Devices Inc. qualifies as a substitute based on these parameters. Both devices share identical TO-220-3 packaging, support overlapping input and output voltage specifications, maintain single-output architecture, and operate within the same temperature range.

Parameter Comparison

Engineering Selection Recommendations

The LT1585CT#PBF is suitable as a substitute for the RC1585T based on the following factors:

Package and Mechanical Compatibility: Both devices use TO-220-3 packaging with through-hole mounting, enabling direct PCB-level replacement without layout modifications.

Electrical Parameter Overlap: The LT1585CT#PBF accepts the same maximum input voltage (7V) and supports output voltage ranges that encompass the RC1585T specification window (1.5V ~ 3.6V falls within the LT1585CT#PBF range of 1.25V ~ 5.5V).

Temperature Range Alignment: Both devices operate across 0°C to 125°C, maintaining identical thermal specifications for industrial applications.

Regulatory Compliance: Both parts maintain REACH Unaffected status and MSL Level 1 (Unlimited) moisture sensitivity classification, ensuring equivalent environmental and handling compliance.

Product Status Advantage: The LT1585CT#PBF carries Active product status, providing long-term availability and supply chain continuity compared to the obsolete RC1585T.

Frequently Asked Questions (FAQ)

Q: Can the LT1585CT#PBF directly replace the RC1585T on existing PCBs?

A: Yes. Both devices use identical TO-220-3 packaging with through-hole mounting. Pin configuration compatibility must be verified against the specific application schematic, but the physical form factor permits direct substitution.

Q: What are the key electrical differences between these parts?

A: The LT1585CT#PBF supports a wider output voltage range (1.25V ~ 5.5V) compared to the RC1585T (1.5V ~ 3.6V). For applications requiring output voltages between 1.5V and 3.6V, both devices operate within their specified ranges. The LT1585CT#PBF provides additional output voltage flexibility for designs requiring voltages above 3.6V or below 1.5V.

Q: Are there any compliance or certification differences?

A: Both parts maintain REACH Unaffected status and identical moisture sensitivity levels (MSL 1 - Unlimited). No compliance disadvantages exist when substituting the LT1585CT#PBF for the RC1585T.

Q: Why is the RC1585T listed as obsolete?

A: The RC1585T is classified as obsolete due to end-of-life status from the manufacturer. The LT1585CT#PBF, maintained in active production status, provides a viable alternative for new designs and ongoing production requirements.

Q: What should be verified before implementing the LT1585CT#PBF as a substitute?

A: Confirm pin-to-pin compatibility with the original RC1585T in your specific application. Verify that the output voltage range required by your circuit falls within both devices' specifications. Review the detailed datasheets for any application-specific requirements such as quiescent current, dropout voltage, or protection features relevant to your design.