74LVT574MSA Equivalent & Substitute Parts

Part Overview

The 74LVT574MSA is a D-type flip-flop logic integrated circuit manufactured by onsemi, featuring 1 element with 8-bit positive edge triggering in a 20-SSOP package. This component operates at 150 MHz clock frequency with tri-state, non-inverted outputs and is designed for low-voltage TTL (LVT) applications with supply voltage range of 2.7V to 3.6V.

The 74LVT574MSA is classified as obsolete. Equivalent and substitute parts are necessary to maintain design continuity and ensure component availability for new production runs and system upgrades.

Key Parameters

Parameter	Value
Manufacturer	onsemi
Part Number	74LVT574MSA
Series	74LVT
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-SSOP (0.209", 5.30mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the 74LVT574MSA is determined by the following critical parameters:

Logic Function: D-type flip-flop with 1 element, 8-bit configuration, positive edge trigger
Output Characteristics: Tri-state, non-inverted outputs
Electrical Performance: 150 MHz clock frequency, 2.7V to 3.6V supply voltage range, -40°C to 85°C operating temperature
Package Compatibility: Surface mount technology with matching pin count and electrical interface

Substitute parts are grouped into two categories based on package type:

Category 1 - 20-SSOP Package (0.209", 5.30mm Width): Direct mechanical and electrical equivalents maintaining the original package footprint. Includes SN74LVTH574DB and SN74LVTH574DBR from Texas Instruments.

Category 2 - 20-TSSOP Package (0.173", 4.40mm Width): Functionally equivalent parts with reduced package width, suitable for space-constrained applications. Includes 74LVT574PW/AUJ (NXP), SN74LVT574PWR, SN74LVTH574IPWREP, SN74LVTH574PW, and SN74LVTH574PWR (all Texas Instruments).

Parameter Comparison

Part Number	Manufacturer	Series	Package / Case	Clock Frequency	Max Propagation Delay @ 3.3V, 50pF	Voltage - Supply	Current - Output High, Low	Input Capacitance	Operating Temperature	Product Status	RoHS Status
74LVT574MSA	onsemi	74LVT	20-SSOP (0.209", 5.30mm)	150 MHz	4.6ns	2.7V ~ 3.6V	32mA, 64mA	4 pF	-40°C ~ 85°C	Obsolete	Not specified
74LVT574PW/AUJ	NXP USA Inc.	74LVT	20-TSSOP (0.173", 4.40mm)	150 MHz	5.9ns	2.7V ~ 3.6V	32mA, 64mA	4 pF	-40°C ~ 85°C	Active	ROHS3 Compliant
SN74LVT574PWR	Texas Instruments	74LVT	20-TSSOP (0.173", 4.40mm)	150 MHz	6.6ns	2.7V ~ 3.6V	32mA, 64mA	4 pF	-40°C ~ 85°C	Active	ROHS3 Compliant
SN74LVTH574DB	Texas Instruments	74LVTH	20-SSOP (0.209", 5.30mm)	150 MHz	4.5ns	2.7V ~ 3.6V	32mA, 64mA	3 pF	-40°C ~ 85°C	Active	ROHS3 Compliant
SN74LVTH574DBR	Texas Instruments	74LVTH	20-SSOP (0.209", 5.30mm)	150 MHz	4.5ns	2.7V ~ 3.6V	32mA, 64mA	3 pF	-40°C ~ 85°C	Active	ROHS3 Compliant
SN74LVTH574IPWREP	Texas Instruments	74LVTH	20-TSSOP (0.173", 4.40mm)	150 MHz	4.5ns	2.7V ~ 3.6V	32mA, 64mA	3 pF	-40°C ~ 85°C	Active	ROHS3 Compliant
SN74LVTH574PW	Texas Instruments	74LVTH	20-TSSOP (0.173", 4.40mm)	150 MHz	4.5ns	2.7V ~ 3.6V	32mA, 64mA	3 pF	-40°C ~ 85°C	Active	ROHS3 Compliant
SN74LVTH574PWR	Texas Instruments	74LVTH	20-TSSOP (0.173", 4.40mm)	150 MHz	4.5ns	2.7V ~ 3.6V	32mA, 64mA	3 pF	-40°C ~ 85°C	Active	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Package Replacement (20-SSOP):

SN74LVTH574DB and SN74LVTH574DBR are the primary substitutes for the 74LVT574MSA when package footprint compatibility is required. Both parts maintain the 20-SSOP (0.209", 5.30mm Width) package, feature active product status, and carry ROHS3 compliance certification. The 74LVTH series offers improved propagation delay performance (4.5ns versus 4.6ns) and reduced input capacitance (3 pF versus 4 pF), providing enhanced electrical characteristics within the same package envelope.

For Space-Optimized Applications (20-TSSOP):

When PCB real estate is constrained, the 20-TSSOP package variants provide functional equivalence with reduced package width (0.173", 4.40mm). SN74LVTH574IPWREP and SN74LVTH574PWR deliver the fastest propagation delay performance (4.5ns) among TSSOP options. SN74LVT574PWR maintains the 74LVT series designation with 6.6ns propagation delay. All TSSOP substitutes are active products with ROHS3 compliance.

Compliance Considerations:

All substitute parts listed carry ROHS3 compliance and REACH Unaffected status, meeting modern environmental and regulatory requirements. The transition from the obsolete 74LVT574MSA to active 74LVTH series variants ensures long-term component availability and supply chain stability.

Frequently Asked Questions (FAQ)

Q: Can SN74LVTH574DB replace 74LVT574MSA in existing designs?

A: Yes. Both parts share identical package geometry (20-SSOP), pin count, logic function, supply voltage range (2.7V to 3.6V), operating temperature range (-40°C to 85°C), and output drive capability (32mA/64mA). The 74LVTH variant offers superior electrical performance with faster propagation delay and lower input capacitance.

Q: What is the difference between 74LVT and 74LVTH series?

A: Both series operate within the same voltage and temperature specifications and are functionally compatible. The 74LVTH series provides improved propagation delay characteristics (4.5ns versus 4.6ns at 3.3V, 50pF load) and lower input capacitance (3 pF versus 4 pF), making it suitable for higher-speed applications.

Q: Can I use a 20-TSSOP package part as a substitute for the 20-SSOP original?

A: Functional substitution is possible, but physical package replacement requires PCB redesign. The 20-TSSOP package (0.173", 4.40mm width) is narrower than the 20-SSOP (0.209", 5.30mm width), necessitating layout modifications. Pin assignments and electrical characteristics remain compatible.

Q: Are all substitute parts currently available?

A: All listed substitute parts carry active product status. SN74LVTH574PWR shows the highest inventory level (5400 pcs), followed by SN74LVTH574DBR (3184 pcs) and SN74LVT574PWR (2730 pcs), indicating strong market availability.

Q: What packaging options are available for the substitutes?

A: Substitute parts are supplied in Tube or Tape & Reel (TR) packaging. Tape & Reel packaging is standard for high-volume production applications, while Tube packaging is suitable for lower-volume requirements.

Q: Do the substitutes meet RoHS compliance?

A: Yes. All active substitute parts listed carry ROHS3 Compliant certification, meeting current environmental and regulatory standards for electronic components.

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