74LVTH574MSAX Equivalent & Substitute Parts

Part Overview

The 74LVTH574MSAX 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 clock frequency of 150 MHz with tri-state, non-inverted output configuration in a 20-SSOP surface mount package.

The 74LVTH574MSAX is classified as obsolete. Equivalent and substitute parts are necessary to maintain design continuity and ensure component availability for new production runs, repairs, and system upgrades.

Key Parameters

Parameter	Value
Manufacturer Part Number	74LVTH574MSAX
Manufacturer	onsemi
Category	Logic
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 Range	2.7V ~ 3.6V
Operating Temperature	-40°C ~ 85°C
Package Type	20-SSOP (0.209", 5.30mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the 74LVTH574MSAX is determined by the following critical parameters:

Functional Equivalence Requirements:

D-Type flip-flop configuration with 1 element and 8-bit capacity
Positive edge trigger mechanism
Tri-state, non-inverted output type
Clock frequency of 150 MHz minimum
Supply voltage range of 2.7V ~ 3.6V
Operating temperature range of -40°C ~ 85°C

Package Compatibility: Substitute parts are grouped into two package categories:

20-SSOP (0.209", 5.30mm Width) — direct footprint compatibility
20-TSSOP (0.173", 4.40mm Width) — alternative package with different PCB layout requirements

Electrical Performance: All substitute parts maintain identical output current specifications (32mA high, 64mA low), quiescent current (190 µA), and input capacitance within acceptable tolerances. Propagation delay variations are within engineering margins for this logic family.

Product Status Consideration: Active status substitutes are preferred over obsolete components for long-term design reliability and supply chain continuity.

Parameter Comparison

Parameter	74LVTH574MSAX (onsemi)	SN74LVT574PWR (TI)	SN74LVTH574DB (TI)	SN74LVTH574DBR (TI)	SN74LVTH574IPWREP (TI)	SN74LVTH574PW (TI)	SN74LVTH574PWR (TI)
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
Number of Bits per Element	8	8	8	8	8	8	8
Output Type	Tri-State, Non-Inverted	Tri-State, Non-Inverted	Tri-State, Non-Inverted	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	150 MHz	150 MHz	150 MHz
Trigger Type	Positive Edge	Positive Edge	Positive Edge	Positive Edge	Positive Edge	Positive Edge	Positive Edge
Voltage Supply Range	2.7V ~ 3.6V	2.7V ~ 3.6V	2.7V ~ 3.6V	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	32mA, 64mA	32mA, 64mA	32mA, 64mA
Current - Quiescent (Iq)	190 µA	190 µA	190 µA	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	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Package / Case	20-SSOP (0.209", 5.30mm)	20-TSSOP (0.173", 4.40mm)	20-SSOP (0.209", 5.30mm)	20-SSOP (0.209", 5.30mm)	20-TSSOP (0.173", 4.40mm)	20-TSSOP (0.173", 4.40mm)	20-TSSOP (0.173", 4.40mm)
Product Status	Obsolete	Active	Active	Active	Active	Active	Active
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

For Direct Footprint Replacement (20-SSOP Package):

SN74LVTH574DB and SN74LVTH574DBR are the primary substitutes for the 74LVTH574MSAX. Both are manufactured by Texas Instruments, maintain identical 20-SSOP package dimensions, and are classified as active products. These parts provide direct PCB compatibility without layout modifications. SN74LVTH574DBR offers tape and reel packaging for high-volume production, while SN74LVTH574DB is supplied in tube packaging. Both carry ROHS3 compliance certification.

For Alternative Package Consideration (20-TSSOP Package):

SN74LVTH574PWR, SN74LVTH574PW, and SN74LVTH574IPWREP utilize the 20-TSSOP package format with reduced width (0.173" versus 0.209"). These substitutes require PCB layout redesign but offer space optimization benefits. All three are active products with ROHS3 compliance. SN74LVTH574PWR provides the highest inventory availability (5400 units) among all substitutes.

For Legacy 74LVT Series Compatibility:

SN74LVT574PWR represents the 74LVT logic family variant. While functionally equivalent, this part operates with slightly higher propagation delay (6.6ns versus 4.5ns at 3.3V, 50pF). Selection of this substitute is appropriate only when timing margins permit the additional delay specification.

Compliance and Supply Chain:

All Texas Instruments substitutes carry ROHS3 compliance and REACH unaffected status, matching the regulatory requirements of the original component. Active product status ensures long-term availability and manufacturing support.

Frequently Asked Questions (FAQ)

Q: Can SN74LVTH574PWR replace 74LVTH574MSAX directly on the PCB?

A: SN74LVTH574PWR uses the 20-TSSOP package (0.173" width) while the 74LVTH574MSAX uses 20-SSOP (0.209" width). Both packages have 20 pins with identical pin assignments, but the footprints differ in width. Direct PCB replacement requires layout modification. For direct footprint compatibility without redesign, use SN74LVTH574DB or SN74LVTH574DBR instead.

Q: What is the difference between SN74LVTH574DBR and SN74LVTH574DB?

A: Both parts are identical in electrical specifications and package type (20-SSOP). The difference is packaging format: SN74LVTH574DBR is supplied in tape and reel (TR) format for automated assembly, while SN74LVTH574DB is supplied in tube format for manual handling. Select based on your production assembly method.

Q: Is SN74LVT574PWR a suitable substitute?

A: SN74LVT574PWR is functionally equivalent but exhibits higher propagation delay (6.6ns versus 4.5ns at 3.3V, 50pF). It is suitable only if your circuit timing specifications allow for this additional delay. For timing-critical applications, use SN74LVTH574PWR or SN74LVTH574DB instead.

Q: Are all substitute parts RoHS compliant?

A: All Texas Instruments substitutes (SN74LVT574PWR, SN74LVTH574DB, SN74LVTH574DBR, SN74LVTH574IPWREP, SN74LVTH574PW, SN74LVTH574PWR) carry ROHS3 compliance certification. The original 74LVTH574MSAX RoHS status is not specified in the provided data.

Q: Which substitute has the best inventory availability?

A: SN74LVTH574PWR offers the highest inventory level at 5400 units in stock. SN74LVTH574DBR provides 3184 units, and SN74LVTH574DB provides 1608 units. Inventory levels should be verified with your component supplier for current availability.

Q: Do all substitutes operate at the same supply voltage?

A: Yes. All substitute parts operate within the 2.7V ~ 3.6V supply voltage range, matching the original 74LVTH574MSAX specification. Operating temperature range is also identical at -40°C ~ 85°C across all parts.

Q: What is the significance of the 20-SSOP versus 20-TSSOP package difference?

A: Both are 20-pin surface mount packages with identical pin configurations and electrical performance. The primary difference is physical width: 20-SSOP is 0.209" wide, while 20-TSSOP is 0.173" wide. Package selection depends on PCB layout constraints and available board space. Footprint compatibility must be verified before component selection.

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