SY100EP451LTG Equivalent & Substitute Parts

Part Overview

The SY100EP451LTG is a D-Type flip-flop logic integrated circuit manufactured by Microchip Technology, featuring 1 element with 6-bit configuration in a 32-TQFP package. This component functions as a master reset flip-flop with complementary outputs and operates at a clock frequency of 3 GHz. The part is classified as obsolete, making identification of equivalent and substitute components essential for ongoing system support and new design implementations.

Substiute Parts

SY100EP451LTG

Microchip TechnologyIn Stock: 2107SY100EP451LTG Datasheet

Current PartRFQ

MC100EP451FAG

onsemiIn Stock: 1446MC100EP451FAG Datasheet

DirectRFQ

MC100EP451FAR2G

onsemiIn Stock: 3075MC100EP451FAR2G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SY100EP451LTG are identified based on functional and electrical equivalence within the 100EP series. The substitution logic is determined by the following critical parameters:

Core Functional Parameters:

• Series: 100EP (maintained across all substitutes)
• Type: D-Type Flip Flop (1 element, 6-bit configuration)
• Trigger Type: Positive Edge
• Output Type: Complementary
• Function: Master Reset
• Clock Frequency: 3 GHz
• Operating Temperature Range: -40°C ~ 85°C (TA)

Electrical Compatibility Parameters:

• Voltage Supply Range: -3V minimum to -5.5V maximum (substitutes support extended range)
• Current - Quiescent (Iq): 120 mA to 135 mA (within acceptable operational variance)

Physical and Compliance Parameters:

• Mounting Type: Surface Mount (consistent)
• RoHS Status: ROHS3 Compliant (maintained)
• REACH Status: REACH Unaffected (consistent)

The substitute parts MC100EP451FAG and MC100EP451FAR2G are manufactured by onsemi and maintain functional equivalence while offering active product status and improved availability compared to the obsolete Microchip part.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: MC100EP451FAR2G

The MC100EP451FAR2G is the manufacturer-recommended substitute for the obsolete SY100EP451LTG. This part maintains full functional equivalence across all critical parameters while offering the following advantages:

• Active product status ensures long-term availability and supply chain continuity
• Extended voltage supply range (-3V ~ -5.5V) provides broader operational margin compared to the original -3V ~ -3.6V specification
• Improved moisture sensitivity level (MSL 2, 1 Year) compared to the original (MSL 3, 168 Hours), reducing handling and storage constraints
• Tape & Reel packaging format supports automated assembly processes
• Highest inventory availability (3012 Pcs) among available substitutes
• ROHS3 compliance and REACH unaffected status maintained

Secondary Substitute: MC100EP451FAG

The MC100EP451FAG provides equivalent functionality with identical electrical and operational characteristics to MC100EP451FAR2G. Selection of this part is appropriate when Tray packaging format is preferred over Tape & Reel, or when specific procurement requirements mandate this packaging configuration. Inventory availability is lower (1350 Pcs) compared to the primary substitute.

Package Consideration:

The substitute parts utilize 32-LQFP packaging instead of the original 32-TQFP. Both packages maintain identical 7x7mm footprint dimensions and pin configurations, supporting direct board-level substitution without PCB redesign.

Frequently Asked Questions (FAQ)

Q: Can MC100EP451FAG and MC100EP451FAR2G be used interchangeably with SY100EP451LTG?

A: Yes. Both onsemi parts maintain functional equivalence across all critical parameters including logic type, bit configuration, clock frequency, trigger characteristics, and operating temperature range. The primary difference is packaging format (Tray vs. Tape & Reel) and supply voltage range extension.

Q: What is the difference between 32-TQFP and 32-LQFP packages?

A: Both packages share identical 7x7mm footprint dimensions and pin configurations, enabling direct substitution at the board level. TQFP (Thin Quad Flat Package) and LQFP (Low-profile Quad Flat Package) represent different manufacturing standards from different manufacturers but are mechanically and electrically compatible for this application.

Q: Does the extended voltage range (-3V ~ -5.5V) on substitute parts affect circuit design?

A: No. The substitute parts support the original voltage specification range (-3V ~ -3.6V) as a subset of their extended range. Existing circuit designs require no modification. The extended range provides additional operational margin for new designs.

Q: What is the significance of MSL rating differences?

A: The original part carries MSL 3 (168 Hours), requiring storage at controlled humidity within 168 hours of package opening. Substitute parts carry MSL 2 (1 Year), allowing extended storage periods and reducing handling constraints. This represents an improvement in manufacturing and storage flexibility.

Q: Are there any compliance or certification differences?

A: No. Both the original and substitute parts maintain ROHS3 compliance and REACH unaffected status. ECCN and HTSUS classifications are identical across all parts.

Q: Which substitute should be selected for new designs?

A: MC100EP451FAR2G is recommended for new designs due to active product status, highest inventory availability, and manufacturer recommendation. This selection ensures long-term supply chain stability and design continuity.