PM5308-FXI Equivalent & Substitute Parts

Part Overview

The PM5308-FXI is a telecom interface IC designed for SONET/SDH applications, manufactured by Microchip Technology. This component is classified as obsolete, which necessitates identification of active equivalent parts for ongoing system support and new designs. The PM5308-FXI provides SONET/SDH functionality with JTAG, Microprocessor, Parallel, and Serial interfaces, operating at 1.2V supply voltage.

Substiute Parts

PM5308-FXI

Microchip TechnologyIn Stock: 1137PM5308-FXI Datasheet

Current PartRFQ

PM5377-FEI

Microchip TechnologyIn Stock: 33273PM5377-FEI Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PM5308-FXI is determined by the following critical parameters:

• Functional Equivalence: SONET/SDH telecom interface capability
• Supply Voltage: 1.2V operation
• Circuit Count: Single circuit configuration
• Manufacturer Consistency: Microchip Technology
• Moisture Sensitivity: MSL 3 (168 Hours) rating
• Interface Compatibility: Support for microprocessor-based integration

The PM5377-FEI qualifies as a manufacturer-recommended substitute based on matching functional requirements, supply voltage, circuit count, and moisture sensitivity specifications. The PM5377-FEI represents an active product status alternative, addressing the obsolescence of the PM5308-FXI while maintaining core electrical and environmental parameters.

Parameter Comparison

Engineering Selection Recommendations

The PM5377-FEI is the manufacturer-recommended substitute for the obsolete PM5308-FXI. Both components maintain identical supply voltage (1.2V), circuit count (1), and moisture sensitivity specifications (MSL 3, 168 Hours), ensuring functional compatibility in SONET/SDH telecom interface applications.

The PM5377-FEI offers the advantage of active product status, ensuring continued availability and manufacturer support. Additionally, the PM5377-FEI achieves ROHS3 compliance, whereas the PM5308-FXI is RoHS non-compliant. This compliance improvement may be relevant for applications subject to environmental regulations.

Selection of the PM5377-FEI is appropriate for new designs and replacement applications requiring SONET/SDH interface functionality with current product lifecycle support.

Frequently Asked Questions (FAQ)

Q: Why is the PM5308-FXI being phased out? A: The PM5308-FXI is classified as obsolete. The PM5377-FEI is the active equivalent part provided by Microchip Technology for continued system support.

Q: Are the PM5308-FXI and PM5377-FEI electrically equivalent? A: Both parts operate at 1.2V supply voltage, contain a single circuit, and provide SONET/SDH telecom interface functionality. They share identical moisture sensitivity specifications (MSL 3, 168 Hours) and HTSUS classification.

Q: What is the difference in packaging between these parts? A: The PM5308-FXI packaging information is not specified in the available data. The PM5377-FEI is supplied in Tray packaging.

Q: Does the PM5377-FEI support the same interfaces as the PM5308-FXI? A: The PM5308-FXI supports JTAG, Microprocessor, Parallel, and Serial interfaces. The PM5377-FEI supports Microprocessor interface. Interface compatibility should be verified against specific application requirements.

Q: What is the inventory status of these parts? A: The PM5308-FXI has 1,107 pieces in stock. The PM5377-FEI has 33,200 pieces in stock, providing greater availability for new orders.

Q: Is the PM5377-FEI RoHS compliant? A: Yes, the PM5377-FEI is ROHS3 compliant. The PM5308-FXI is RoHS non-compliant.