74LVTH574SJX Equivalent & Substitute Parts

Part Overview

The 74LVTH574SJX is a D-Type flip-flop logic integrated circuit manufactured by onsemi, featuring 1 element with 8-bit positive edge triggering capability. This component is classified as obsolete, which necessitates identification of active equivalent parts for ongoing design requirements and production continuity. The 74LVTH series provides standard logic functionality suitable for digital signal processing and data storage applications requiring tri-state, non-inverted outputs.

Key Parameters

Parameter	Value
Manufacturer Part Number	74LVTH574SJX
Manufacturer	onsemi
Series	74LVTH
Type	D-Type Flip Flop
Number of Elements	1
Number of Bits per Element	8
Output Type	Tri-State, Non-Inverted
Clock Frequency	150 MHz
Trigger Type	Positive Edge
Voltage - Supply	2.7V ~ 3.6V
Operating Temperature	-40°C ~ 85°C (TA)
Package / Case	20-SOIC (0.209", 5.30mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the 74LVTH574SJX is determined by strict equivalence across the following critical parameters:

Functional Equivalence: D-Type flip-flop architecture with 1 element, 8-bit configuration, positive edge triggering
Electrical Compatibility: Tri-state, non-inverted output type; 150 MHz clock frequency; 2.7V ~ 3.6V supply voltage range; -40°C ~ 85°C operating temperature
Package Compatibility: 20-SOIC surface mount package with matching physical dimensions and pin configuration
Series Alignment: 74LVTH logic series designation

All substitute parts listed maintain these parameters within the specified tolerances. Packaging format variations (tube, tape & reel) do not affect functional or electrical compatibility.

Parameter Comparison

Parameter	74LVTH574SJX (onsemi)	SN74LVTH574DW (TI)	SN74LVTH574DWR (TI)	SN74LVTH574NSR (TI)
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
Output Type	Tri-State, Non-Inverted	Tri-State, Non-Inverted	Tri-State, Non-Inverted	Tri-State, Non-Inverted
Clock Frequency	150 MHz	150 MHz	150 MHz	150 MHz
Trigger Type	Positive Edge	Positive Edge	Positive Edge	Positive Edge
Voltage - Supply	2.7V ~ 3.6V	2.7V ~ 3.6V	2.7V ~ 3.6V	2.7V ~ 3.6V
Current - Output High, Low	32mA, 64mA	32mA, 64mA	32mA, 64mA	32mA, 64mA
Current - Quiescent (Iq)	190 µA	190 µA	190 µA	190 µA
Operating Temperature	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Max Propagation Delay @ 3.3V, 50pF	4.6ns	4.5ns	4.5ns	4.5ns
Input Capacitance	4 pF	3 pF	3 pF	3 pF
Product Status	Obsolete	Active	Active	Active
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation: SN74LVTH574NSR (Texas Instruments)

The SN74LVTH574NSR provides the closest physical and functional match to the 74LVTH574SJX. Both components utilize the 20-SOIC package with identical 0.209" (5.30mm) width specification, ensuring direct PCB footprint compatibility. The SN74LVTH574NSR maintains active product status with ROHS3 compliance certification, supporting long-term supply chain continuity and regulatory requirements.

Secondary Options: SN74LVTH574DW and SN74LVTH574DWR (Texas Instruments)

Both Texas Instruments alternatives maintain full electrical and functional equivalence. The SN74LVTH574DW and SN74LVTH574DWR utilize a 20-SOIC package with 0.295" (7.50mm) width, representing a wider package variant. These parts are suitable for applications where package width variation is acceptable within PCB layout constraints. The SN74LVTH574DWR offers tape & reel packaging with significantly higher inventory availability (91,697 units).

Compliance Consideration: All Texas Instruments substitute parts carry ROHS3 compliance certification, whereas the original onsemi part does not specify RoHS status. This distinction is relevant for applications subject to environmental compliance requirements.

Frequently Asked Questions (FAQ)

Q: Can the SN74LVTH574DW be used as a direct replacement for the 74LVTH574SJX?

A: The SN74LVTH574DW is electrically and functionally equivalent but uses a wider 20-SOIC package (0.295" vs. 0.209" width). PCB footprint compatibility depends on available board space. Pin configuration and electrical performance are identical.

Q: What is the difference between SN74LVTH574DWR and SN74LVTH574DW?

A: Both parts are electrically identical. The primary difference is packaging format: SN74LVTH574DW is supplied in tube packaging, while SN74LVTH574DWR is supplied in tape & reel format. Tape & reel packaging is standard for high-volume production environments.

Q: Is the SN74LVTH574NSR a pin-for-pin replacement?

A: Yes. The SN74LVTH574NSR maintains identical pin configuration, electrical specifications, and package dimensions (0.209" width) as the 74LVTH574SJX, enabling direct PCB substitution without layout modifications.

Q: Why do the Texas Instruments parts show lower propagation delay (4.5ns vs. 4.6ns)?

A: The 0.1ns difference in maximum propagation delay at 3.3V and 50pF load is within normal manufacturing tolerance variation and does not affect functional compatibility or system performance.

Q: Are all substitute parts RoHS compliant?

A: All three Texas Instruments substitute parts (SN74LVTH574DW, SN74LVTH574DWR, SN74LVTH574NSR) carry ROHS3 compliance certification. The original onsemi 74LVTH574SJX does not specify RoHS status in the provided data.

Q: What packaging options are available for the substitute parts?

A: SN74LVTH574DW is available in tube packaging. SN74LVTH574DWR and SN74LVTH574NSR are available in tape & reel format. All three maintain identical electrical and functional specifications.

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