74LVC574APW,112 Equivalent & Substitute Parts

Part Overview

The 74LVC574APW,112 is a D-type flip-flop logic integrated circuit manufactured by Nexperia USA Inc., designed for 8-bit data storage and transfer applications. This component features tri-state, non-inverted outputs and operates across a supply voltage range of 1.65V to 3.6V. The part is currently classified as obsolete, making equivalent and substitute parts necessary for ongoing design support, production continuity, and system maintenance. Substitute parts must maintain functional equivalence in D-type flip-flop operation, 8-bit configuration, positive edge triggering, and 20-TSSOP packaging while meeting the electrical performance requirements of the original design.

Key Parameters

Parameter	Value
Manufacturer Part Number	74LVC574APW,112
Manufacturer	Nexperia USA Inc.
Category	Logic
Series	74LVC
Function	D-Type Flip-Flop
Number of Elements	1
Number of Bits per Element	8
Output Type	Tri-State, Non-Inverted
Clock Frequency	200 MHz
Max Propagation Delay @ 3.3V, 50pF	7 ns
Trigger Type	Positive Edge
Current - Output High, Low	24 mA, 24 mA
Voltage - Supply	1.65V ~ 3.6V
Current - Quiescent (Iq)	10 µA
Input Capacitance	5 pF
Operating Temperature	-40°C ~ 125°C (TA)
Package / Case	20-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the 74LVC574APW,112 are selected based on strict electrical and mechanical compatibility criteria. All substitute parts must meet the following requirements:

Core Functional Requirements:

D-Type flip-flop architecture with 1 element and 8 bits per element
Tri-state, non-inverted output configuration
Positive edge trigger mechanism
20-TSSOP package with 0.173" width and 4.40mm dimensions

Electrical Performance Criteria:

Supply voltage range must encompass or be compatible with 1.65V ~ 3.6V operation
Maximum propagation delay at 3.3V and 50pF load must not exceed 7 ns (or within acceptable tolerance for the application)
Output current capability of 24 mA minimum for both high and low states
Quiescent current of 10 µA maximum
Operating temperature range must support -40°C ~ 125°C minimum

Compliance & Certification:

ROHS3 compliance required
MSL rating of 1 (Unlimited) preferred
Surface mount configuration mandatory

Substitute parts are grouped into two categories: Active Status Parts (recommended for new designs and production continuity) and Obsolete Status Parts (suitable for legacy system maintenance where active alternatives are unavailable).

Parameter Comparison

Part Number	Manufacturer	Product Status	Clock Frequency (MHz)	Max Propagation Delay @ 3.3V, 50pF (ns)	Voltage Supply (V)	Input Capacitance (pF)	Operating Temp (°C)	Packaging	Inventory
74LVC574APW,112	Nexperia USA Inc.	Obsolete	200	7	1.65 ~ 3.6	5	-40 ~ 125	Tube	908 Pcs
SN74LVC574APW	Texas Instruments	Active	150	6.8	1.65 ~ 3.6	4	-40 ~ 125	Tube	3,400 Pcs
SN74LVC574APWR	Texas Instruments	Active	150	6.8	1.65 ~ 3.6	4	-40 ~ 125	Cut Tape (CT) & Digi-Reel®	237,968 Pcs
SN74LVC574APWT	Texas Instruments	Active	150	6.8	1.65 ~ 3.6	4	-40 ~ 125	Tape & Reel (TR)	1,209 Pcs
SN74LVC574AQPWREP	Texas Instruments	Active	150	7	2.0 ~ 3.6	4	-40 ~ 125	Tape & Reel (TR)	895 Pcs
CLVC574AQPWRG4Q1	Texas Instruments	Active	150	7	2.0 ~ 3.6	4	-40 ~ 125	Tape & Reel (TR)	8,300 Pcs
MC74LCX574DTR2G	onsemi	Active	150	8.5	2.0 ~ 3.6	7	-40 ~ 85	Tape & Reel (TR)	85,400 Pcs
MC74LCX574DTG	onsemi	Obsolete	150	8.5	2.0 ~ 3.6	7	-40 ~ 85	Tube	1,279 Pcs

Engineering Selection Recommendations

Primary Substitutes (Active Status, Full Compatibility):

SN74LVC574APW, SN74LVC574APWR, and SN74LVC574APWT are direct functional equivalents manufactured by Texas Instruments. These parts maintain the 74LVC series designation, support the full supply voltage range of 1.65V ~ 3.6V, and operate across the complete temperature range of -40°C ~ 125°C. Propagation delay performance (6.8 ns) exceeds the original specification. These parts are available in multiple packaging formats (Tube, Cut Tape & Digi-Reel, and Tape & Reel) with substantial inventory levels, making them suitable for both immediate replacement and long-term production planning.

Secondary Substitutes (Active Status, Conditional Compatibility):

SN74LVC574AQPWREP and CLVC574AQPWRG4Q1 are active alternatives with matching propagation delay (7 ns) and input capacitance (4 pF). However, the minimum supply voltage is 2.0V rather than 1.65V. These parts are suitable for applications where the design operates at 2.0V or higher. CLVC574AQPWRG4Q1 includes automotive-grade qualification (AEC-Q100), making it appropriate for automotive and harsh-environment applications.

Tertiary Substitutes (Active Status, Limited Compatibility):

MC74LCX574DTR2G is an active onsemi alternative with the highest inventory availability (85,400 Pcs). This part operates in the 74LCX series with a minimum supply voltage of 2.0V and maximum operating temperature of 85°C (versus 125°C for the original). Propagation delay is 8.5 ns, which exceeds the original specification. This part is suitable for applications with relaxed temperature requirements and 2.0V minimum supply voltage.

Legacy Substitutes (Obsolete Status):

MC74LCX574DTG is an obsolete onsemi part with identical electrical characteristics to MC74LCX574DTR2G but supplied in Tube packaging. This part is suitable only for legacy system maintenance where active alternatives cannot be used.

All substitute parts maintain ROHS3 compliance, MSL rating of 1 (Unlimited), and 20-TSSOP surface mount packaging, ensuring mechanical and environmental compatibility with the original design.

Frequently Asked Questions (FAQ)

Q: Can I use SN74LVC574APWR as a direct replacement for 74LVC574APW,112?

A: Yes. SN74LVC574APWR is a direct functional equivalent. Both are D-type flip-flops with 8-bit configuration, tri-state non-inverted outputs, positive edge triggering, and 20-TSSOP packaging. The SN74LVC574APWR operates across the same supply voltage range (1.65V ~ 3.6V) and temperature range (-40°C ~ 125°C). Propagation delay performance is superior (6.8 ns versus 7 ns). The only difference is packaging format: SN74LVC574APWR uses Cut Tape & Digi-Reel format instead of Tube.

Q: What is the difference between SN74LVC574APW and SN74LVC574AQPWREP?

A: Both are Texas Instruments 74LVC series parts with identical functional operation. The key difference is supply voltage range: SN74LVC574APW supports 1.65V ~ 3.6V, while SN74LVC574AQPWREP supports 2.0V ~ 3.6V. If your design operates at 1.65V, use SN74LVC574APW. If your design operates at 2.0V or higher, either part is acceptable. SN74LVC574AQPWREP is specified at 30pF load for propagation delay measurement, versus 50pF for other parts.

Q: Can I use MC74LCX574DTR2G in place of the original 74LVC574APW,112?

A: MC74LCX574DTR2G is functionally compatible but with operational constraints. Both are 8-bit D-type flip-flops in 20-TSSOP packaging with tri-state non-inverted outputs. However, MC74LCX574DTR2G has a minimum supply voltage of 2.0V (versus 1.65V) and maximum operating temperature of 85°C (versus 125°C). Propagation delay is 8.5 ns, exceeding the original 7 ns specification. Use this part only if your application operates at 2.0V or higher and does not require operation above 85°C.

Q: Why does CLVC574AQPWRG4Q1 have automotive qualification?

A: CLVC574AQPWRG4Q1 is qualified to AEC-Q100 automotive standards, indicating it meets reliability and performance requirements for automotive applications. This qualification is relevant only if your application requires automotive-grade components. For non-automotive applications, standard 74LVC parts are appropriate.

Q: What packaging options are available for 74LVC574 substitutes?

A: Substitute parts are available in three packaging formats: Tube (loose components), Cut Tape & Digi-Reel (continuous tape with reel), and Tape & Reel (standard reel packaging). Tube packaging is suitable for low-volume or prototype applications. Cut Tape & Digi-Reel and Tape & Reel formats are designed for automated assembly and high-volume production. Select packaging based on your assembly process and volume requirements.

Q: Is the 74LVC574 series compatible with the 74LCX574 series?

A: Both series are D-type flip-flops with 8-bit configuration and 20-TSSOP packaging, but they are not identical. The 74LVC series supports lower supply voltages (1.65V minimum) and higher operating temperatures (125°C maximum), while the 74LCX series requires 2.0V minimum supply and operates to 85°C maximum. The 74LCX series has higher input capacitance (7 pF versus 4-5 pF) and slightly higher propagation delay (8.5 ns versus 6.8-7 ns). Use 74LCX parts only when 74LVC alternatives are unavailable and your application constraints permit the operational limitations.

Q: What is the significance of the propagation delay difference between parts?

A: Propagation delay is the time required for an output to respond to an input change. The original 74LVC574APW,112 specifies 7 ns maximum at 3.3V with 50pF load. Substitute parts with lower propagation delay (6.8 ns) provide faster response and are fully compatible. Parts with higher propagation delay (8.5 ns) may introduce timing constraints in high-speed applications. Verify that your circuit timing margins accommodate the propagation delay of the selected substitute part.

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