74LVTH574SJ Equivalent & Substitute Parts

Part Overview

The 74LVTH574SJ is a D-type flip-flop logic integrated circuit manufactured by onsemi, featuring 1 element with 8-bit positive edge triggering capability. This component operates at a maximum clock frequency of 150 MHz with tri-state, non-inverted outputs. The part is currently classified as obsolete, making equivalent substitutes necessary for ongoing system support and new design implementations. Texas Instruments manufactures active-status alternatives that maintain functional and electrical compatibility with the original onsemi design.

Key Parameters

Parameter	Value
Function	D-Type Flip Flop
Number of Elements	1
Number of Bits per Element	8
Clock Frequency	150 MHz
Output Type	Tri-State, Non-Inverted
Trigger Type	Positive Edge
Voltage Supply Range	2.7V ~ 3.6V
Operating Temperature	-40°C ~ 85°C
Mounting Type	Surface Mount
Series	74LVTH

Substitute Part Grouping Explanation

Substitution eligibility for the 74LVTH574SJ is determined by strict equivalence across the following critical parameters: D-type flip-flop function with 1 element and 8-bit configuration, positive edge trigger operation, tri-state non-inverted output architecture, 150 MHz clock frequency capability, 2.7V to 3.6V supply voltage range, and -40°C to 85°C operating temperature specification. All identified substitutes maintain these core electrical and functional characteristics. Package variations (20-SOIC with different body widths) are permitted substitutes provided the mounting type remains surface mount and the supplier device package classification remains compatible with 20-SOIC or 20-SO designations.

Parameter Comparison

Parameter	74LVTH574SJ (onsemi)	SN74LVTH574DW (TI)	SN74LVTH574DWR (TI)	SN74LVTH574NSR (TI)
Manufacturer	onsemi	Texas Instruments	Texas Instruments	Texas Instruments
Product Status	Obsolete	Active	Active	Active
Type	D-Type	D-Type	D-Type	D-Type
Number of Elements	1	1	1	1
Number of Bits per Element	8	8	8	8
Clock Frequency	150 MHz	150 MHz	150 MHz	150 MHz
Output Type	Tri-State, Non-Inverted	Tri-State, Non-Inverted	Tri-State, Non-Inverted	Tri-State, Non-Inverted
Trigger Type	Positive Edge	Positive Edge	Positive Edge	Positive Edge
Current - Output High, Low	32mA, 64mA	32mA, 64mA	32mA, 64mA	32mA, 64mA
Voltage - Supply	2.7V ~ 3.6V	2.7V ~ 3.6V	2.7V ~ 3.6V	2.7V ~ 3.6V
Current - Quiescent (Iq)	190 µA	190 µA	190 µA	190 µA
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Supplier Device Package	20-SOP	20-SOIC	20-SOIC	20-SO
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

All three Texas Instruments substitutes (SN74LVTH574DW, SN74LVTH574DWR, SN74LVTH574NSR) are active-status components that provide direct functional replacement for the obsolete 74LVTH574SJ. The Texas Instruments alternatives carry ROHS3 compliance certification, providing regulatory advantage over the original part. Selection between the three Texas Instruments options depends on packaging and supply chain requirements: SN74LVTH574DW is supplied in tube packaging, SN74LVTH574DWR is supplied in tape and reel format with significantly higher inventory availability (91,697 pieces), and SN74LVTH574NSR is supplied in tape and reel format with a package body width of 0.209 inches, matching the original onsemi part's physical dimensions. All three maintain identical electrical performance specifications and operating parameters.

Frequently Asked Questions (FAQ)

Q: Can the Texas Instruments SN74LVTH574DW, SN74LVTH574DWR, and SN74LVTH574NSR be used interchangeably with the 74LVTH574SJ?

A: Yes. All three Texas Instruments parts maintain functional and electrical equivalence with the 74LVTH574SJ across all critical parameters: D-type flip-flop architecture, 8-bit configuration, 150 MHz clock frequency, tri-state non-inverted outputs, positive edge triggering, 2.7V to 3.6V supply voltage range, and -40°C to 85°C operating temperature. Differences exist only in packaging format and body dimensions.

Q: What are the package differences between the substitute parts?

A: The 74LVTH574SJ uses a 20-SOP package with 0.209-inch body width. The SN74LVTH574DW and SN74LVTH574DWR use 20-SOIC packages with 0.295-inch body width. The SN74LVTH574NSR uses a 20-SO package with 0.209-inch body width, matching the original part's physical dimensions. All are surface-mount packages compatible with standard PCB assembly processes.

Q: What is the difference between SN74LVTH574DW and SN74LVTH574DWR?

A: Both parts are electrically identical. The primary difference is packaging format: SN74LVTH574DW is supplied in tube packaging, while SN74LVTH574DWR is supplied in tape and reel format. The tape and reel version (DWR) has substantially higher inventory availability.

Q: Are there compliance or regulatory differences between the original and substitute parts?

A: The Texas Instruments substitutes carry ROHS3 compliance certification. All parts maintain REACH Unaffected status and identical moisture sensitivity level (MSL 1 - Unlimited). The substitutes provide improved regulatory compliance for new designs.

Q: Which substitute should be selected for new designs?

A: For new designs, any of the three Texas Instruments substitutes is acceptable based on packaging and supply requirements. The SN74LVTH574NSR maintains the original 0.209-inch body width if PCB layout constraints exist. The SN74LVTH574DWR offers the highest inventory availability in tape and reel format for production volumes.

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