SY89543LMI-TR Equivalent & Substitute Parts

Part Overview

The SY89543LMI-TR is a precision multiplexer IC manufactured by Microchip Technology, classified as a Logic component in the Precision Edge® series. This device functions as a 1 x 2:1 multiplexer with 2 independent circuits, housed in a 32-QFN (5x5) surface mount package. The SY89543LMI-TR is currently discontinued at DiGi Electronics, making identification of equivalent substitute parts essential for ongoing design support and production continuity.

Substiute Parts

SY89543LMI-TR

Microchip TechnologyIn Stock: 970SY89543LMI-TR Datasheet

Current PartRFQ

SY89543LMG-TR

Microchip TechnologyIn Stock: 6076SY89543LMG-TR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SY89543LMI-TR are identified based on strict electrical and mechanical parameter matching. The following criteria determine substitution eligibility:

Critical Matching Parameters:

• Multiplexer circuit configuration (1 x 2:1)
• Independent circuit count (2)
• Voltage supply range (3V ~ 3.6V)
• Operating temperature range (-40°C ~ 85°C)
• Package type (32-VFQFN Exposed Pad)
• Mounting type (Surface Mount)
• Moisture Sensitivity Level (MSL 3)

The SY89543LMG-TR meets all these parameters and is classified as a parametric equivalent. The primary distinction between the main part and its substitute is product status and compliance certification, not functional or electrical characteristics.

Parameter Comparison

Engineering Selection Recommendations

The SY89543LMG-TR is the direct parametric equivalent for the discontinued SY89543LMI-TR. Both parts share identical electrical specifications, circuit configuration, and package geometry. Selection between these parts should be based on the following factors:

Product Status: The SY89543LMG-TR maintains Active status, ensuring long-term availability and supply chain continuity. The SY89543LMI-TR is discontinued, limiting future procurement options.

Compliance Certification: The SY89543LMG-TR is ROHS3 compliant, while the SY89543LMI-TR is RoHS non-compliant. For applications subject to RoHS regulations or customer requirements, the SY89543LMG-TR is the appropriate selection.

Inventory Availability: The SY89543LMG-TR has significantly higher stock levels (6002 Pcs versus 861 Pcs), supporting both immediate and future production requirements.

For new designs or production continuity, the SY89543LMG-TR is the recommended substitute part.

Frequently Asked Questions (FAQ)

Q: Are the SY89543LMI-TR and SY89543LMG-TR electrically interchangeable?

A: Yes. Both parts are identical in electrical performance, circuit configuration (1 x 2:1 multiplexer with 2 independent circuits), voltage supply range (3V ~ 3.6V), and operating temperature range (-40°C ~ 85°C).

Q: Can the SY89543LMG-TR be used as a direct replacement in existing PCB designs?

A: Yes. Both parts use the same 32-VFQFN Exposed Pad package with identical pinout and mechanical dimensions. No PCB redesign is required.

Q: What is the significance of the RoHS compliance difference?

A: The SY89543LMG-TR is ROHS3 compliant, meeting current environmental and regulatory standards. The SY89543LMI-TR is RoHS non-compliant. For applications requiring RoHS certification or serving regulated markets, the SY89543LMG-TR must be selected.

Q: Why is the SY89543LMI-TR discontinued?

A: Product discontinuation is a manufacturer decision. The SY89543LMG-TR remains in active production and serves the same functional requirements.

Q: Are there any differences in moisture sensitivity handling?

A: No. Both parts carry an MSL rating of 3 (168 Hours), requiring identical moisture control and storage procedures during manufacturing and assembly.

Q: Which part should be specified for new designs?

A: The SY89543LMG-TR should be specified for new designs due to its active product status, ROHS3 compliance, and superior inventory availability.