74VHCT573AMTC Equivalent & Substitute Parts

Part Overview

The 74VHCT573AMTC is a D-Type Transparent Latch logic IC manufactured by onsemi, featuring an 8:8 circuit configuration with tri-state output capability in a 20-TSSOP surface mount package. This component is classified as obsolete, which necessitates identification of equivalent and substitute parts for ongoing design requirements and production continuity. The part operates within a 4.5V to 5.5V supply voltage range with a propagation delay of 5.1ns and output current capability of 8mA for both high and low states.

Key Parameters

Parameter	Value
Manufacturer Part Number	74VHCT573AMTC
Manufacturer	onsemi
Logic Type	D-Type Transparent Latch
Circuit Configuration	8:8
Output Type	Tri-State
Voltage - Supply	4.5V ~ 5.5V
Delay Time - Propagation	5.1ns
Current - Output High, Low	8mA, 8mA
Operating Temperature	-40°C ~ 85°C
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 74VHCT573AMTC are classified based on the following substitution criteria:

Parametric Equivalent: Parts that maintain identical electrical specifications across all critical parameters including supply voltage range (4.5V ~ 5.5V), circuit configuration (8:8), output type (tri-state), output current (8mA/8mA), operating temperature range (-40°C ~ 85°C), and package type (20-TSSOP). The MC74VHCT573ADTG meets these requirements with active product status.

Direct Manufacturer Equivalent: Parts that satisfy the same functional requirements but may operate across an extended supply voltage range or offer improved performance characteristics. The SN74LV573ATPW operates from 2V to 5.5V with faster propagation delay (1ns) and higher output current (16mA/16mA), classified as Last Time Buy status.

Similar Logic Family Substitutes: Parts within compatible logic families (74AHCT series) that maintain the same circuit configuration, output type, and package footprint but may differ in propagation delay or operating temperature range. These include SN74AHCT573DBR, SN74AHCT573DGVR, SN74AHCT573PW, and 74AHCT573PW,118, all with active or limited availability status.

Parameter Comparison

Parameter	74VHCT573AMTC	MC74VHCT573ADTG	SN74LV573ATPW	74AHCT573PW,118	SN74AHCT573DBR	SN74AHCT573DGVR	SN74AHCT573PW	SN74AHCT573PWR
Manufacturer	onsemi	onsemi	Texas Instruments	Nexperia USA Inc.	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments
Logic Type	D-Type Transparent Latch	D-Type Transparent Latch	D-Type Transparent Latch	D-Type Transparent Latch	D-Type Transparent Latch	D-Type Transparent Latch	D-Type Transparent Latch	D-Type Transparent Latch
Circuit Configuration	8:8	8:8	8:8	8:8	8:8	8:8	8:8	8:8
Output Type	Tri-State	Tri-State	Tri-State	Tri-State	Tri-State	Tri-State	Tri-State	Tri-State
Voltage - Supply	4.5V ~ 5.5V	4.5V ~ 5.5V	2V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V
Delay Time - Propagation	5.1ns	5.1ns	1ns	4.6ns	1ns	1ns	1ns	1ns
Current - Output High, Low	8mA, 8mA	8mA, 8mA	16mA, 16mA	8mA, 8mA	8mA, 8mA	8mA, 8mA	8mA, 8mA	8mA, 8mA
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 125°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Package / Case	20-TSSOP (0.173", 4.40mm Width)	20-TSSOP (0.173", 4.40mm Width)	20-TSSOP (0.173", 4.40mm Width)	20-TSSOP (0.173", 4.40mm Width)	20-SSOP (0.209", 5.30mm Width)	20-TFSOP (0.173", 4.40mm Width)	20-TSSOP (0.173", 4.40mm Width)	20-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Product Status	Obsolete	Active	Last Time Buy	Active	Active	Active	Discontinued at DiGi Electronics	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Primary Recommendation: MC74VHCT573ADTG is the optimal parametric equivalent, offering identical electrical specifications to the 74VHCT573AMTC with active product status and ROHS3 compliance. This part maintains the same 4.5V to 5.5V supply voltage range, 5.1ns propagation delay, 8mA output current, and 20-TSSOP package footprint. Selection of this part ensures direct functional compatibility with minimal design modification.

Secondary Recommendation: SN74AHCT573PWR provides an active alternative from Texas Instruments with identical supply voltage, output current, and package specifications. The 74AHCT series offers faster propagation delay (1ns) compared to the original part, which may provide performance benefits in timing-critical applications. This part is available in Cut Tape and Digi-Reel packaging with active product status.

Extended Temperature Range Option: 74AHCT573PW,118 from Nexperia USA Inc. extends the operating temperature range to -40°C to 125°C while maintaining all other critical parameters. This option is suitable for applications requiring enhanced thermal performance with active product status.

Package Consideration: SN74AHCT573DBR uses a 20-SSOP package (0.209" width) instead of the standard 20-TSSOP (0.173" width), requiring PCB layout verification before selection. This part maintains all electrical specifications and offers active product status.

Extended Supply Voltage Range: SN74LV573ATPW operates across 2V to 5.5V supply voltage with improved propagation delay (1ns) and higher output current (16mA). This part is classified as Last Time Buy and should be evaluated only when extended voltage range compatibility is required.

Frequently Asked Questions (FAQ)

Q: Can MC74VHCT573ADTG be used as a direct replacement for 74VHCT573AMTC?

A: Yes. MC74VHCT573ADTG is a parametric equivalent with identical supply voltage (4.5V ~ 5.5V), propagation delay (5.1ns), output current (8mA/8mA), operating temperature range (-40°C ~ 85°C), and 20-TSSOP package. The primary difference is product status: MC74VHCT573ADTG is active while 74VHCT573AMTC is obsolete.

Q: What are the key differences between 74AHCT573 and 74VHCT573 series parts?

A: Both series maintain identical supply voltage (4.5V ~ 5.5V), output current (8mA/8mA), and package specifications. The primary difference is propagation delay: 74VHCT573 parts have 5.1ns delay while 74AHCT573 parts have 1ns to 4.6ns delay, depending on the specific manufacturer variant.

Q: Is package compatibility critical when selecting a substitute?

A: Yes. While most substitutes use the 20-TSSOP package (0.173" width), SN74AHCT573DBR uses a 20-SSOP package (0.209" width). PCB footprint and layout must be verified before selecting this alternative to ensure mechanical compatibility.

Q: Can SN74LV573ATPW replace 74VHCT573AMTC in all applications?

A: SN74LV573ATPW offers extended supply voltage range (2V ~ 5.5V) and improved performance (1ns propagation delay, 16mA output current). However, it is classified as Last Time Buy. Selection should be based on specific application requirements for extended voltage range operation.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and Moisture Sensitivity Level 1 (Unlimited), matching the environmental and regulatory status of the original 74VHCT573AMTC.

Q: Which substitute offers the best availability?

A: SN74AHCT573DGVR has the highest inventory (5075 Pcs) with active product status. SN74AHCT573PWR also offers strong availability (5200 Pcs) in Cut Tape and Digi-Reel packaging with active status.

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