SY10EP451LTG Equivalent & Substitute Parts

Part Overview

The SY10EP451LTG 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 functionally equivalent alternatives necessary for ongoing design support and production continuity.

Substiute Parts

SY10EP451LTG

Microchip TechnologyIn Stock: 898SY10EP451LTG Datasheet

Current PartRFQ

MC100EP451FAG

onsemiIn Stock: 1446MC100EP451FAG Datasheet

DirectRFQ

MC10EP451FAG

onsemiIn Stock: 1230MC10EP451FAG Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SY10EP451LTG are identified based on functional equivalence across the following critical parameters:

• Type: D-Type flip-flop architecture
• Number of Elements: 1
• Number of Bits per Element: 6
• Clock Frequency: 3 GHz
• Trigger Type: Positive Edge
• Output Type: Complementary
• Function: Master Reset
• Operating Temperature Range: -40°C ~ 85°C (TA)
• Mounting Type: Surface Mount

The substitute parts maintain these core functional specifications. Variations in supply voltage range, quiescent current, package configuration (TQFP vs. LQFP), and product status are documented in the parameter comparison table below.

Parameter Comparison

Engineering Selection Recommendations

Both substitute parts maintain active product status with onsemi as the manufacturer, providing long-term availability and supply chain stability compared to the obsolete SY10EP451LTG. Both alternatives are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements.

MC10EP451FAG is designated as the manufacturer-recommended substitute. This part shares the same base product number series (10EP) as the original Microchip part and offers improved moisture sensitivity rating (MSL 2 vs. MSL 3), reducing handling and storage constraints.

MC100EP451FAG represents an alternative direct substitute from the 100EP series. This part provides expanded supply voltage range (-3V ~ -5.5V) compared to the original specification (-3V ~ -3.6V), offering greater design flexibility in applications with variable supply conditions.

Both substitute parts use 32-LQFP packaging instead of the original 32-TQFP. The 7x7mm footprint dimensions remain identical, supporting direct PCB layout compatibility. Package transition from TQFP to LQFP requires verification of lead pitch and soldering process parameters for your specific manufacturing environment.

Frequently Asked Questions (FAQ)

Q: Can MC10EP451FAG and MC100EP451FAG be used interchangeably with SY10EP451LTG?

A: Both parts are functionally equivalent based on core logic specifications: D-Type flip-flop architecture, 1 element, 6-bit configuration, 3 GHz clock frequency, positive edge trigger, complementary outputs, and master reset function. Both operate across the same temperature range (-40°C ~ 85°C). Package footprint dimensions (7x7mm) are identical, supporting direct PCB substitution. Differences in supply voltage range, quiescent current, and moisture sensitivity must be evaluated against your specific application requirements.

Q: What is the difference between TQFP and LQFP packaging?

A: Both the original SY10EP451LTG (32-TQFP) and substitute parts (32-LQFP) are 32-pin surface mount packages with identical 7x7mm footprints. TQFP (Thin Quad Flat Pack) and LQFP (Low-profile Quad Flat Pack) differ in lead configuration and profile height. Substitution requires verification of lead pitch compatibility and reflow soldering parameters specific to your manufacturing process.

Q: Why is the supply voltage range different between the original and substitute parts?

A: The original SY10EP451LTG specifies -3V ~ -3.6V supply voltage, while both substitute parts specify -3V ~ -5.5V. The expanded range in substitute parts provides greater operational flexibility. If your design operates within the original -3V ~ -3.6V specification, both substitutes remain fully compatible. Applications requiring the extended voltage range benefit from the substitute parts' broader specification.

Q: What does MSL rating mean for component selection?

A: Moisture Sensitivity Level (MSL) indicates the maximum time a component can be exposed to specified humidity conditions before soldering. The original part has MSL 3 (168 hours), while substitutes have MSL 2 (1 year). Lower MSL numbers provide longer shelf life and reduced handling constraints. If your supply chain or storage conditions involve extended humidity exposure, the substitute parts' improved MSL rating reduces risk of moisture-induced failures.

Q: Are both substitute parts equally recommended?

A: MC10EP451FAG is designated as the manufacturer-recommended substitute, sharing the same 10EP series designation as the original Microchip part. MC100EP451FAG is a direct functional alternative from the 100EP series. Both are active products with equivalent core specifications. Selection between them depends on your supply chain preferences, inventory management, and the expanded voltage range requirement in MC100EP451FAG.