74LCX574MTC Equivalent & Substitute Parts

Part Overview

The 74LCX574MTC is a D-type flip-flop logic integrated circuit manufactured by onsemi, featuring 1 element with 8-bit capacity and tri-state, non-inverted output configuration. This component operates as a standard positive-edge triggered flip-flop in the 74LCX logic family. The part is currently classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. Substitute parts maintain functional equivalence while offering improved availability and active product status from alternative manufacturers.

Key Parameters

Parameter	Value
Manufacturer Part Number	74LCX574MTC
Manufacturer	onsemi
Logic Family	74LCX
Function	D-Type Flip-Flop, Standard
Number of Elements	1
Number of Bits per Element	8
Output Type	Tri-State, Non-Inverted
Clock Frequency	150 MHz
Max Propagation Delay	8.5 ns @ 3.3V, 50pF
Trigger Type	Positive Edge
Current - Output High/Low	24 mA / 24 mA
Voltage Supply Range	2V ~ 3.6V
Current - Quiescent	10 µA
Input Capacitance	7 pF
Operating Temperature	-40°C ~ 85°C
Package Type	20-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the 74LCX574MTC are classified based on strict adherence to the following critical parameters:

Primary Substitution Criteria:

Logic family compatibility (74LCX or 74LVC series)
D-type flip-flop configuration with 1 element, 8-bit capacity
Positive-edge trigger type
Tri-state, non-inverted output configuration
20-pin TSSOP package footprint (0.173", 4.40mm Width)
Surface mount mounting type
Supply voltage range overlap with 2V ~ 3.6V minimum requirement
Output current capability of 24 mA minimum (both high and low)

Grouping Categories:

Direct Manufacturer Equivalents (onsemi): Parts MC74LCX574DTR2G and MC74LCX574DTG maintain identical electrical specifications and 74LCX series designation. MC74LCX574DTR2G differs only in packaging format (Tape & Reel vs. bulk) and holds active product status. MC74LCX574DTG is supplied in tube packaging and remains obsolete.

Cross-Manufacturer Direct Substitutes: 74LVC574AT20-13 (Diodes Incorporated), 74LCX574FT (Toshiba), and SN74LVC574APW (Texas Instruments) provide functional equivalence with identical package geometry and pin configuration. These parts operate within compatible voltage and frequency parameters.

Extended Compatibility Substitutes: 74LVC574APW,118 (NXP), CLVC574AQPWRG4Q1 (Texas Instruments), SN74LVC574ADBR, SN74LVC574ADGVR, and SN74LVC574APWR represent parts with minor package or performance variations while maintaining core functional compatibility.

Parameter Comparison

Part Number	Manufacturer	Series	Output Type	Clock Frequency	Max Propagation Delay @ 3.3V, 50pF	Voltage Supply	Operating Temp	Package	Product Status
74LCX574MTC	onsemi	74LCX	Tri-State, Non-Inverted	150 MHz	8.5 ns	2V ~ 3.6V	-40°C ~ 85°C	20-TSSOP	Obsolete
MC74LCX574DTR2G	onsemi	74LCX	Tri-State, Non-Inverted	150 MHz	8.5 ns	2V ~ 3.6V	-40°C ~ 85°C	20-TSSOP	Active
MC74LCX574DTG	onsemi	74LCX	Tri-State, Non-Inverted	150 MHz	8.5 ns	2V ~ 3.6V	-40°C ~ 85°C	20-TSSOP	Obsolete
74LVC574AT20-13	Diodes Incorporated	74LVC	Non-Inverted	125 MHz	7.1 ns	1.65V ~ 3.6V	-40°C ~ 125°C	20-TSSOP	Active
74LCX574FT	Toshiba	74LCX	Tri-State, Non-Inverted	150 MHz	8.5 ns	1.65V ~ 3.6V	-40°C ~ 85°C	20-TSSOP	Active
74LVC574APW,118	NXP Semiconductors	74LVC	Tri-State, Non-Inverted	200 MHz	7 ns	1.65V ~ 3.6V	-40°C ~ 125°C	20-TSSOP	Active
CLVC574AQPWRG4Q1	Texas Instruments	74LVC	Tri-State, Non-Inverted	150 MHz	7 ns	2V ~ 3.6V	-40°C ~ 125°C	20-TSSOP	Active
SN74LVC574ADBR	Texas Instruments	74LVC	Tri-State, Non-Inverted	150 MHz	6.8 ns	1.65V ~ 3.6V	-40°C ~ 125°C	20-SSOP	Active
SN74LVC574ADGVR	Texas Instruments	74LVC	Tri-State, Non-Inverted	150 MHz	6.8 ns	1.65V ~ 3.6V	-40°C ~ 125°C	20-TFSOP	Active
SN74LVC574APW	Texas Instruments	74LVC	Tri-State, Non-Inverted	150 MHz	6.8 ns	1.65V ~ 3.6V	-40°C ~ 125°C	20-TSSOP	Active
SN74LVC574APWR	Texas Instruments	74LVC	Tri-State, Non-Inverted	150 MHz	6.8 ns	1.65V ~ 3.6V	-40°C ~ 125°C	20-TSSOP	Active

Engineering Selection Recommendations

Primary Recommendation: MC74LCX574DTR2G (onsemi) provides the most direct substitution path, maintaining identical electrical specifications, 74LCX series designation, and 20-TSSOP package geometry while offering active product status and superior availability (85,400 units in stock).

Alternative Selections Based on Application Requirements:

For designs requiring extended operating temperature range (-40°C to 125°C), select from the 74LVC series alternatives: 74LVC574AT20-13, 74LCX574FT, 74LVC574APW,118, CLVC574AQPWRG4Q1, SN74LVC574ADBR, SN74LVC574ADGVR, SN74LVC574APW, or SN74LVC574APWR. All maintain tri-state, non-inverted output configuration and positive-edge trigger operation.

For designs with lower voltage supply requirements (1.65V minimum), 74LVC574AT20-13, 74LCX574FT, 74LVC574APW,118, SN74LVC574ADBR, SN74LVC574ADGVR, SN74LVC574APW, and SN74LVC574APWR support operation down to 1.65V.

For automotive-grade applications, CLVC574AQPWRG4Q1 carries AEC-Q100 qualification and automotive grade designation.

Package Considerations: SN74LVC574ADBR uses 20-SSOP (0.209", 5.30mm Width) package; SN74LVC574ADGVR uses 20-TFSOP (0.173", 4.40mm Width) package. Both differ from the standard 20-TSSOP footprint and require PCB layout verification before selection.

All substitute parts maintain ROHS3 compliance and REACH unaffected status where specified.

Frequently Asked Questions (FAQ)

Q: Can MC74LCX574DTR2G directly replace 74LCX574MTC without design changes?

A: Yes. MC74LCX574DTR2G maintains identical electrical specifications, logic family designation, pin configuration, and 20-TSSOP package footprint. The only difference is packaging format (Tape & Reel vs. bulk) and active product status. No design modifications are required.

Q: What is the primary reason to substitute the 74LCX574MTC?

A: The 74LCX574MTC is classified as obsolete. MC74LCX574DTR2G and other active alternatives ensure long-term supply chain continuity and design support.

Q: Are 74LVC series parts compatible with 74LCX designs?

A: 74LVC series parts provide functional compatibility when core parameters align: D-type flip-flop configuration, 1 element, 8-bit capacity, positive-edge trigger, tri-state non-inverted output, and 20-pin TSSOP package. Verify voltage supply range and operating temperature requirements for your specific application.

Q: What is the difference between 74LCX574FT and SN74LVC574APW?

A: 74LCX574FT (Toshiba) maintains the 74LCX series designation with 150 MHz clock frequency and 8.5 ns propagation delay. SN74LVC574APW (Texas Instruments) operates in the 74LVC series with 150 MHz clock frequency and 6.8 ns propagation delay. Both use 20-TSSOP packages and support tri-state, non-inverted output. SN74LVC574APW offers faster propagation delay and extended operating temperature range (-40°C to 125°C).

Q: Can I use SN74LVC574ADBR as a direct PCB replacement?

A: SN74LVC574ADBR uses 20-SSOP package (0.209", 5.30mm Width) instead of the standard 20-TSSOP (0.173", 4.40mm Width). PCB footprint verification is required. Pin configuration remains compatible, but physical package dimensions differ.

Q: Which substitute offers the best performance improvement?

A: 74LVC574APW,118 (NXP) provides the highest clock frequency at 200 MHz and 7 ns propagation delay at 3.3V, 50pF. SN74LVC574ADBR and SN74LVC574ADGVR offer the fastest propagation delay at 6.8 ns. Performance selection depends on your timing requirements and supply voltage constraints.

Q: Is CLVC574AQPWRG4Q1 suitable for automotive applications?

A: Yes. CLVC574AQPWRG4Q1 carries AEC-Q100 qualification and automotive grade designation, making it suitable for automotive-grade designs requiring D-type flip-flop logic with 8-bit capacity and tri-state output.

Q: What is the minimum supply voltage for each substitute?

A: 74LCX574MTC, MC74LCX574DTR2G, MC74LCX574DTG, and CLVC574AQPWRG4Q1 require 2V minimum. All 74LVC series parts (74LVC574AT20-13, 74LCX574FT, 74LVC574APW,118, SN74LVC574ADBR, SN74LVC574ADGVR, SN74LVC574APW, SN74LVC574APWR) support 1.65V minimum supply voltage.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message