SY100EL51ZG Equivalent & Substitute Parts

Part Overview

The SY100EL51ZG is a D-Type flip-flop logic integrated circuit manufactured by Microchip Technology, featuring 1 element with 1 bit per element and complementary output configuration. This component operates at a clock frequency of 2.8 GHz with a supply voltage range of -4.2V to -5.5V and is housed in an 8-SOIC surface mount package.

The SY100EL51ZG is classified as obsolete. Equivalent and substitute parts are necessary to maintain design continuity, ensure component availability, and support ongoing production requirements for applications utilizing this flip-flop logic function.

Key Parameters

Parameter	Value
Manufacturer Part Number	SY100EL51ZG
Manufacturer	Microchip Technology
Category	Logic
Type	D-Type Flip Flop
Number of Elements	1
Number of Bits per Element	1
Output Type	Complementary
Clock Frequency	2.8 GHz
Voltage - Supply	-4.2V ~ -5.5V
Current - Quiescent (Iq)	29 mA
Operating Temperature	-40°C ~ 85°C (TA)
Trigger Type	Positive, Negative
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the SY100EL51ZG is determined by the following critical parameters:

Functional Equivalence: All substitute parts maintain the same D-Type flip-flop configuration with 1 element, 1 bit per element, complementary output, positive/negative trigger capability, and reset function.

Package Compatibility: All substitute parts are housed in the 8-SOIC (0.154", 3.90mm Width) surface mount package, ensuring mechanical and electrical pin compatibility.

Electrical Characteristics: Substitute parts are grouped by supply voltage range and clock frequency specifications. The SY100EL51ZG operates at 2.8 GHz with a supply voltage of -4.2V to -5.5V and quiescent current of 29 mA.

Environmental and Compliance Standards: All substitute parts maintain ROHS3 compliance, MSL Level 1 (Unlimited), and REACH Unaffected status, ensuring regulatory alignment.

Product Status Consideration: Active product status substitutes are preferred for long-term availability and ongoing production support.

Parameter Comparison

Parameter	SY100EL51ZG (Main)	MC100EL51DG	MC100EP51DG	MC100EP51DR2G	MC100LVEL51DG	MC10EL51DG	MC10EP51DG	MC10EP51DR2G
Manufacturer	Microchip Technology	onsemi	onsemi	onsemi	onsemi	onsemi	onsemi	onsemi
Type	D-Type	D-Type	D-Type	D-Type	D-Type	D-Type	D-Type	D-Type
Number of Elements	1	1	1	1	1	1	1	1
Number of Bits per Element	1	1	1	1	1	1	1	1
Output Type	Complementary	Complementary	Complementary	Complementary	Complementary	Complementary	Complementary	Complementary
Clock Frequency	2.8 GHz	2.8 GHz	3 GHz	3 GHz	2.8 GHz	2.8 GHz	3 GHz	3 GHz
Voltage - Supply	-4.2V ~ -5.5V	-4.2V ~ -5.7V	-3V ~ -5.5V	-3V ~ -5.5V	-3V ~ -3.8V	-4.2V ~ -5.7V	-3V ~ -5.5V	-3V ~ -5.5V
Current - Quiescent (Iq)	29 mA	29 mA	45 mA	45 mA	35 mA	29 mA	45 mA	45 mA
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Trigger Type	Positive, Negative	Positive, Negative	Positive, Negative	Positive, Negative	Positive, Negative	Positive, Negative	Positive, Negative	Positive, Negative
Package / Case	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Product Status	Obsolete	Active	Active	Active	Active	Obsolete	Obsolete	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Primary Substitute - MC100EL51DG: This onsemi part provides the closest electrical match to the SY100EL51ZG, maintaining identical clock frequency (2.8 GHz), quiescent current (29 mA), and supply voltage range (-4.2V to -5.7V). The part holds Active product status, ensuring long-term availability and manufacturing support. This is the manufacturer-recommended substitute.

Alternative Substitute - MC100EP51DR2G: This onsemi part operates at 3 GHz clock frequency with a supply voltage range of -3V to -5.5V and quiescent current of 45 mA. It maintains Active product status and is supplied in Tape & Reel packaging. This substitute is suitable for applications where higher clock frequency capability is acceptable and supply voltage compatibility exists.

Alternative Substitute - MC100LVEL51DG: This onsemi part operates at 2.8 GHz with a restricted supply voltage range of -3V to -3.8V and quiescent current of 35 mA. This substitute is applicable only to designs operating within the lower voltage range and holds Active product status.

Obsolete Alternatives - MC10EL51DG and MC10EP51DG: These onsemi parts are classified as Obsolete and should be considered only when Active alternatives are unavailable. MC10EL51DG matches the 2.8 GHz frequency and 29 mA quiescent current specifications. MC10EP51DG operates at 3 GHz with 45 mA quiescent current.

All substitute parts maintain ROHS3 compliance, MSL Level 1 (Unlimited), and REACH Unaffected status, ensuring regulatory alignment with the original SY100EL51ZG.

Frequently Asked Questions (FAQ)

Q: Can MC100EL51DG directly replace SY100EL51ZG in existing designs?

A: Yes. MC100EL51DG is the manufacturer-recommended substitute and maintains identical functional specifications, clock frequency (2.8 GHz), quiescent current (29 mA), supply voltage range (-4.2V to -5.7V), and 8-SOIC package configuration. Pin compatibility and electrical performance are equivalent.

Q: What is the difference between MC100EP51DG and MC100EL51DG?

A: MC100EP51DG operates at 3 GHz clock frequency with a supply voltage range of -3V to -5.5V and quiescent current of 45 mA. MC100EL51DG operates at 2.8 GHz with a supply voltage range of -4.2V to -5.7V and quiescent current of 29 mA. Both are functionally equivalent D-Type flip-flops with complementary outputs in 8-SOIC packages. Selection depends on clock frequency requirements and supply voltage availability in the target application.

Q: What is the significance of the packaging designation (Tube vs. Tape & Reel)?

A: Tube packaging (MC100EL51DG, MC100EP51DG, MC10EL51DG, MC10EP51DG) is suitable for lower-volume applications and manual assembly processes. Tape & Reel packaging (MC100EP51DR2G, MC10EP51DR2G) is designed for high-volume automated assembly and pick-and-place equipment. Both packaging types contain identical die and electrical specifications; the choice depends on production volume and assembly methodology.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed maintain ROHS3 compliance, Moisture Sensitivity Level 1 (Unlimited), and REACH Unaffected status, matching the regulatory compliance profile of the SY100EL51ZG.

Q: Why is MC100LVEL51DG listed as a substitute if its supply voltage range differs?

A: MC100LVEL51DG is functionally equivalent and maintains the same 8-SOIC package, D-Type flip-flop configuration, and 2.8 GHz clock frequency. However, its supply voltage range (-3V to -3.8V) is restricted compared to the SY100EL51ZG (-4.2V to -5.5V). This part is a valid substitute only for applications operating within the -3V to -3.8V voltage window.

Q: Should I use obsolete parts like MC10EL51DG?

A: Obsolete parts should be considered only when Active alternatives are unavailable or when existing inventory must be utilized. MC10EL51DG and MC10EP51DG are classified as Obsolete and may face future supply constraints. Active alternatives such as MC100EL51DG or MC100EP51DR2G are recommended for new designs and long-term production continuity.

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