74LVTH574MTCX Equivalent & Substitute Parts

Part Overview

The 74LVTH574MTCX is a D-type flip-flop logic integrated circuit manufactured by onsemi, configured as a single element with 8-bit positive edge triggering. This device operates at 150 MHz clock frequency with tri-state, non-inverted output architecture. The part is currently in Last Time Buy status, making identification of equivalent and substitute components essential for design continuity and procurement planning.

Key Parameters

Parameter	Value
Manufacturer Part Number	74LVTH574MTCX
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
Max Propagation Delay @ 3.3V, 50pF	4.6 ns
Trigger Type	Positive Edge
Current - Output High, Low	32 mA, 64 mA
Voltage - Supply	2.7V ~ 3.6V
Current - Quiescent (Iq)	190 µA
Input Capacitance	4 pF
Operating Temperature	-40°C ~ 85°C
Package / Case	20-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the 74LVTH574MTCX is determined by the following critical parameters:

Functional Equivalence Requirements:

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

Electrical Performance Criteria:

Maximum propagation delay at 3.3V, 50pF load
Output current capability: 32 mA (high), 64 mA (low)
Quiescent current: 190 µA
Input capacitance tolerance

Package Compatibility:

20-TSSOP (0.173", 4.40mm Width) for direct pin-for-pin substitution
20-SSOP (0.209", 5.30mm Width) for similar functional substitution with package redesign consideration

Compliance & Regulatory:

ROHS3 compliance
MSL Level 1 (Unlimited)
REACH Unaffected status

Substitute parts are classified into three categories: Parametric Equivalents (identical electrical and package specifications), Direct Manufacturers (same base product number from alternative suppliers), and Similar parts (same functionality with package variation).

Parameter Comparison

Part Number	Manufacturer	Series	Package	Propagation Delay @ 3.3V, 50pF	Input Capacitance	Product Status	Inventory
74LVTH574MTCX	onsemi	74LVTH	20-TSSOP	4.6 ns	4 pF	Last Time Buy	4133 Pcs
74LVT574MTCX	onsemi	74LVT	20-TSSOP	4.6 ns	4 pF	Last Time Buy	2090 Pcs
SN74LVTH374IPWREP	Texas Instruments	74LVTH	20-TSSOP	4.5 ns	3 pF	Active	1046 Pcs
SN74LVTH574IPWREP	Texas Instruments	74LVTH	20-TSSOP	4.5 ns	3 pF	Active	616 Pcs
SN74LVTH574PW	Texas Instruments	74LVTH	20-TSSOP	4.5 ns	3 pF	Active	869 Pcs
SN74LVTH574PWR	Texas Instruments	74LVTH	20-TSSOP	4.5 ns	3 pF	Active	5400 Pcs
SN74LVTH574DB	Texas Instruments	74LVTH	20-SSOP	4.5 ns	3 pF	Active	1608 Pcs
SN74LVTH574DBR	Texas Instruments	74LVTH	20-SSOP	4.5 ns	3 pF	Active	3184 Pcs
74LVT574PW/AUJ	NXP USA Inc.	74LVT	20-TSSOP	5.9 ns	4 pF	Active	1000 Pcs
SN74LVT574PWR	Texas Instruments	74LVT	20-TSSOP	6.6 ns	4 pF	Active	2730 Pcs

Engineering Selection Recommendations

Direct Pin-for-Pin Substitutes (20-TSSOP Package):

SN74LVTH574PWR (Texas Instruments) is the primary recommended substitute. This part maintains Active product status with the highest available inventory (5400 Pcs), ensuring long-term supply continuity. Electrical performance is superior with 4.5 ns propagation delay compared to the original 4.6 ns, and reduced input capacitance (3 pF vs 4 pF) provides improved signal integrity. All compliance certifications (ROHS3, MSL Level 1, REACH Unaffected) are maintained.

SN74LVTH574IPWREP (Texas Instruments) provides an alternative with identical electrical specifications and Active status, though with lower inventory availability (616 Pcs).

SN74LVTH574PW (Texas Instruments) offers equivalent performance in Tube packaging with 869 Pcs inventory.

Parametric Equivalents (Same Series, 20-TSSOP):

74LVT574MTCX (onsemi) maintains identical electrical parameters and package specifications but operates under Last Time Buy status. This part is suitable only for immediate procurement needs without long-term supply assurance.

74LVT574PW/AUJ (NXP USA Inc.) provides Active status with parametric equivalence, though propagation delay is degraded to 5.9 ns. This part is acceptable for applications with relaxed timing requirements.

SN74LVT574PWR (Texas Instruments) operates with 6.6 ns propagation delay and Active status, suitable for non-critical timing applications.

Package Variant Substitutes (20-SSOP Package):

SN74LVTH574DB and SN74LVTH574DBR (Texas Instruments) provide identical electrical performance with Active status but require PCB layout redesign due to 20-SSOP package (0.209", 5.30mm Width) versus original 20-TSSOP (0.173", 4.40mm Width). These parts are recommended only when PCB redesign is feasible.

Compliance Status:

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

Frequently Asked Questions (FAQ)

Q: Can SN74LVTH574PWR be used as a direct replacement for 74LVTH574MTCX?

A: Yes. SN74LVTH574PWR is a direct pin-for-pin substitute with identical 20-TSSOP package, matching supply voltage range (2.7V ~ 3.6V), output configuration (tri-state, non-inverted), and operating temperature range (-40°C ~ 85°C). Electrical performance is superior with 4.5 ns propagation delay versus 4.6 ns. No circuit modifications are required.

Q: What is the difference between 74LVTH574MTCX and 74LVT574MTCX?

A: Both parts share identical electrical specifications, package type (20-TSSOP), and compliance certifications. The primary difference is series designation: 74LVTH versus 74LVT. Both operate at 150 MHz with 4.6 ns propagation delay at 3.3V, 50pF load. The 74LVT574MTCX is suitable for direct substitution but is in Last Time Buy status.

Q: Why do SN74LVTH574DB and SN74LVTH574DBR have different package dimensions?

A: These parts use 20-SSOP packaging (0.209", 5.30mm Width) instead of 20-TSSOP (0.173", 4.40mm Width). While electrically equivalent, the wider package requires PCB layout redesign and cannot be used as a direct drop-in replacement. Pin count and function remain identical.

Q: Is propagation delay critical for selecting a substitute?

A: Propagation delay is a critical parameter for timing-sensitive applications. The original 74LVTH574MTCX specifies 4.6 ns at 3.3V, 50pF. Texas Instruments substitutes (SN74LVTH574PWR, SN74LVTH574PW, SN74LVTH574IPWREP) offer improved 4.5 ns performance. NXP and Texas Instruments 74LVT series parts specify 5.9 ns to 6.6 ns and are suitable only for applications with relaxed timing margins.

Q: What does Last Time Buy status mean for the original part?

A: Last Time Buy indicates the manufacturer will discontinue production. The 74LVTH574MTCX has 4133 Pcs in stock but no future manufacturing. Substitution with Active status parts (Texas Instruments SN74LVTH574PWR series) is recommended for new designs and long-term supply security.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance, MSL Level 1 (Unlimited), and REACH Unaffected status, matching the original component's regulatory certifications.

Q: Can I use SN74LVT574PWR in a high-speed application?

A: SN74LVT574PWR operates with 6.6 ns propagation delay, which is 43% slower than the original 4.6 ns specification. This part is suitable only for applications where timing margins permit the additional delay. For high-speed applications, use SN74LVTH574PWR (4.5 ns) or equivalent 74LVTH series parts.

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