SY89323LMI-TR Equivalent & Substitute Parts

Part Overview

The SY89323LMI-TR is a mixed signal translator IC manufactured by Microchip Technology, designed to convert LVPECL input signals to LVTTL output signals. This unidirectional translator features 1 circuit with 2 channels per circuit in an 8-MLF® (2x2) surface mount package. The part is currently discontinued at DiGi Electronics, making equivalent substitutes necessary for ongoing design requirements and production needs.

Substiute Parts

SY89323LMI-TR

Microchip TechnologyIn Stock: 845SY89323LMI-TR Datasheet

Current PartRFQ

SY89323LMG-TR

Microchip TechnologyIn Stock: 21113SY89323LMG-TR Datasheet

DirectRFQ

MC100EPT23MNR4G

onsemiIn Stock: 35409MC100EPT23MNR4G Datasheet

DirectRFQ

MC100ELT23DG

onsemiIn Stock: 2010MC100ELT23DG Datasheet

MFR RecommendedRFQ

MC100ELT23DTR2G

onsemiIn Stock: 7382MC100ELT23DTR2G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the SY89323LMI-TR is determined by the following critical parameters:

Primary Substitution Criteria:

• Translator Type: Mixed Signal
• Channel Type: Unidirectional
• Number of Circuits: 1
• Channels per Circuit: 2
• Input Signal: LVPECL (or compatible input standards)
• Output Signal: LVTTL (or compatible output standards)
• Output Type: Non-Inverted
• Operating Temperature Range: -40°C ~ 85°C (TA)
• Mounting Type: Surface Mount
• Package Compatibility: 8-pin DFN or MLF variants

Grouping Logic:

Group 1 - Direct Microchip Equivalent: SY89323LMG-TR maintains identical electrical specifications and package footprint as the original part, with the primary difference being active product status and improved RoHS3 compliance.

Group 2 - Cross-Manufacturer Equivalent: MC100EPT23MNR4G (onsemi) provides equivalent functionality with expanded input signal compatibility (CML, LVDS, LVPECL) and output flexibility (LVTTL, LVCMOS), housed in an 8-DFN package with identical footprint dimensions.

Group 3 - Functional Alternatives with Package Variation: MC100ELT23DG and MC100ELT23DTR2G offer similar signal translation capability but with different circuit configurations (2 circuits vs. 1 circuit) and alternative package options (8-SOIC and 8-TSSOP respectively). These parts are suitable for applications where package footprint flexibility is acceptable.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Recommended Primary Option):

SY89323LMG-TR is the optimal substitute for SY89323LMI-TR. Both parts share identical electrical specifications, circuit configuration (1 circuit, 2 channels), signal translation parameters (LVPECL to LVTTL), and package footprint (8-MLF®). The SY89323LMG-TR is currently in active production status with significantly higher inventory availability (21,100 pcs vs. 809 pcs). The primary advantage is ROHS3 compliance, addressing regulatory requirements for new designs. Pin-for-pin compatibility and identical thermal characteristics (-40°C ~ 85°C) ensure seamless integration into existing PCB layouts without design modification.

For Cross-Manufacturer Substitution (Alternative Option):

MC100EPT23MNR4G (onsemi) provides functional equivalence with expanded signal compatibility. While housed in an 8-DFN package with identical footprint dimensions to the 8-MLF®, this part accepts broader input signal standards (CML, LVDS, LVPECL) and supports multiple output formats (LVTTL, LVCMOS). This flexibility is advantageous for designs requiring future signal standard adaptation. Active product status and high inventory (35,300 pcs) ensure long-term availability. Design validation is required to confirm signal integrity across the onsemi platform.

For Package-Flexible Applications:

MC100ELT23DG and MC100ELT23DTR2G are functional alternatives when package footprint variation is acceptable. Both parts feature 2 circuits with 2 channels per circuit, providing additional translation capacity compared to the original 1-circuit design. MC100ELT23DG uses 8-SOIC packaging, while MC100ELT23DTR2G uses 8-TSSOP with higher moisture sensitivity (MSL 3). These parts are obsolete but maintain available inventory. Selection requires PCB layout redesign to accommodate different package dimensions.

Compliance Considerations:

The original SY89323LMI-TR is RoHS non-compliant. All substitute options (SY89323LMG-TR, MC100EPT23MNR4G, MC100ELT23DG, MC100ELT23DTR2G) are ROHS3 compliant, meeting current regulatory standards for new production. All parts maintain REACH Unaffected status and EAR99 export classification.

Frequently Asked Questions (FAQ)

Q: Can SY89323LMG-TR be used as a direct replacement for SY89323LMI-TR without PCB modification?

A: Yes. SY89323LMG-TR is a pin-for-pin equivalent with identical package footprint (8-MLF®), electrical specifications, and operating parameters. No PCB layout changes are required. The primary differences are active product status and improved RoHS3 compliance.

Q: What is the key difference between SY89323LMG-TR and MC100EPT23MNR4G?

A: Both parts provide equivalent LVPECL-to-LVTTL translation with identical circuit configuration (1 circuit, 2 channels) and operating temperature range. The MC100EPT23MNR4G accepts expanded input signal types (CML, LVDS, LVPECL) and supports multiple output standards (LVTTL, LVCMOS), offering greater flexibility. Both use 8-pin DFN packages with identical footprints. The onsemi part is manufactured by a different vendor, requiring design validation for signal integrity.

Q: Why do MC100ELT23DG and MC100ELT23DTR2G have 2 circuits instead of 1?

A: These parts represent a different product line (100ELT series) with enhanced functionality. The additional circuit provides dual translation capability within a single package. However, this configuration change may require circuit redesign if the application requires only single-circuit translation. These parts are obsolete and should be considered only when package flexibility justifies the design effort.

Q: Are there pin-compatibility concerns when switching from Microchip to onsemi parts?

A: SY89323LMG-TR maintains complete pin compatibility with SY89323LMI-TR. MC100EPT23MNR4G uses an 8-DFN package with identical footprint dimensions but may have different pin assignments. Detailed pinout verification is required before substitution. MC100ELT23DG (8-SOIC) and MC100ELT23DTR2G (8-TSSOP) use different package types and require PCB redesign.

Q: What is the impact of MSL rating differences?

A: SY89323LMI-TR, SY89323LMG-TR, and MC100EPT23MNR4G all have MSL 1 (Unlimited), indicating no moisture sensitivity restrictions during storage and handling. MC100ELT23DTR2G has MSL 3 (168 Hours), requiring controlled humidity storage and limiting shelf life to 168 hours after moisture exposure. This affects supply chain logistics and component handling procedures.

Q: Which substitute offers the best long-term availability?

A: MC100EPT23MNR4G (onsemi) currently has the highest inventory (35,300 pcs) and active product status, ensuring long-term availability. SY89323LMG-TR (Microchip) has 21,100 pcs in stock and active status. Both parts are suitable for new designs requiring sustained production support. MC100ELT23DG and MC100ELT23DTR2G are obsolete and should not be selected for new production programs.

Q: Can the SY89323LMI-TR be used in new designs given its discontinued status?

A: No. The part is discontinued at DiGi Electronics, indicating end-of-life status. SY89323LMG-TR is the recommended substitute for new designs, offering identical functionality with active production status and improved compliance. Using discontinued parts in new designs creates supply chain risk and regulatory compliance issues.