74ABT623D,623 Equivalent & Substitute Parts

Part Overview

The 74ABT623D,623 is a non-inverting transceiver IC manufactured by NXP USA Inc., designed for 8-bit data transmission with 3-state output capability. This logic component operates within the 4.5V to 5.5V supply voltage range and is housed in a 20-SOIC package. The part is currently classified as obsolete, making equivalent and substitute parts necessary for ongoing system support and new design implementations. Substitute parts must maintain functional compatibility through matching electrical characteristics and mechanical packaging specifications.

Key Parameters

Parameter	Specification
Logic Type	Transceiver, Non-Inverting
Number of Elements	1
Number of Bits per Element	8
Output Type	3-State
Current - Output High, Low	32mA, 64mA
Voltage - Supply	4.5V ~ 5.5V
Operating Temperature	-40°C ~ 85°C (TA)
Package / Case	20-SOIC (0.295", 7.50mm Width)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the 74ABT623D,623 is determined by strict alignment of the following critical parameters:

Logic Type: Transceiver, Non-Inverting
Bit Configuration: 1 Element, 8 Bits per Element
Output Configuration: 3-State
Output Current Capability: 32mA (High), 64mA (Low)
Supply Voltage Range: 4.5V ~ 5.5V
Package Type: 20-SOIC form factor
Compliance: ROHS3 Compliant, MSL Level 1

Substitute parts are categorized into two groups: MFR Recommended substitutes (direct functional replacements with active product status) and Parametric Equivalents (parts meeting all electrical and mechanical specifications). The MC74VHCT259ADR2G represents a functional alternative with different logic architecture but equivalent electrical performance within the specified voltage and current parameters. All other substitutes maintain identical transceiver specifications with variations in manufacturer, packaging format, and product status.

Parameter Comparison

Parameter	74ABT623D,623 (NXP)	MC74VHCT259ADR2G (onsemi)	SN74ABT623DW (TI)	74ABT245D,623 (Nexperia)	SN74ABT245BDWR (TI)	SN74ABT623DWR (TI)	SN74ABTH245DWR (TI)
Logic Type	Transceiver, Non-Inverting	D-Type, Addressable	Transceiver, Non-Inverting	Transceiver, Non-Inverting	Transceiver, Non-Inverting	Transceiver, Non-Inverting	Transceiver, Non-Inverting
Number of Bits per Element	8	1:8	8	8	8	8	8
Output Type	3-State	Standard	3-State	3-State	3-State	3-State	3-State
Current - Output High, Low	32mA, 64mA	8mA, 8mA	32mA, 64mA	32mA, 64mA	32mA, 64mA	32mA, 64mA	32mA, 64mA
Voltage - Supply	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V
Operating Temperature	-40°C ~ 85°C	-55°C ~ 125°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Package / Case	20-SOIC	16-SOIC	20-SOIC	20-SOIC	20-SOIC	20-SOIC	20-SOIC
Product Status	Obsolete	Active	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

For direct replacement of the obsolete 74ABT623D,623, the SN74ABT623DW and SN74ABT623DWR from Texas Instruments provide identical electrical specifications and 20-SOIC packaging with active product status. These parts maintain the same transceiver architecture, output current ratings, and operating temperature range.

The 74ABT245D,623 from Nexperia USA Inc. and SN74ABT245BDWR from Texas Instruments are parametric equivalents offering the same electrical performance and package form factor. Both are actively manufactured and ROHS3 compliant.

The SN74ABTH245DWR from Texas Instruments represents an alternative within the 74ABTH series, maintaining all critical electrical parameters while offering extended temperature operation capability (-40°C to 85°C).

The MC74VHCT259ADR2G from onsemi operates within the same supply voltage range but features different logic architecture (D-Type, Addressable) and reduced output current capability (8mA vs. 32mA/64mA). This part is suitable only for applications where the lower current drive and different logic function are compatible with system requirements. The 16-SOIC package differs from the 20-SOIC form factor of the main part.

All recommended substitutes maintain ROHS3 compliance and MSL Level 1 rating, ensuring compatibility with standard manufacturing and storage protocols.

Frequently Asked Questions (FAQ)

Q: Can the MC74VHCT259ADR2G directly replace the 74ABT623D,623?

A: The MC74VHCT259ADR2G operates within the same 4.5V to 5.5V supply voltage range but differs in logic type (D-Type, Addressable vs. Transceiver, Non-Inverting), output current capability (8mA vs. 32mA/64mA), and package size (16-SOIC vs. 20-SOIC). Direct substitution is not recommended without circuit redesign and functional verification.

Q: What is the primary difference between the 74ABT623D,623 and the SN74ABT623DW?

A: Both parts are non-inverting transceivers with identical electrical specifications, output current ratings, and 20-SOIC packaging. The primary difference is manufacturer (NXP vs. Texas Instruments) and product status (Obsolete vs. Active). The SN74ABT623DW is the recommended active replacement.

Q: Are all substitute parts ROHS3 compliant?

A: Yes, all listed substitute parts are ROHS3 compliant with MSL Level 1 rating, meeting current environmental and manufacturing standards.

Q: Does package format affect substitution compatibility?

A: Yes. The 74ABT623D,623 uses a 20-SOIC package. Substitutes must use the same 20-SOIC form factor for direct PCB compatibility. The MC74VHCT259ADR2G uses a 16-SOIC package and requires PCB redesign.

Q: Which substitute offers the best long-term availability?

A: The SN74ABT623DWR and SN74ABT623DW from Texas Instruments, along with the 74ABT245D,623 from Nexperia, are all actively manufactured with confirmed inventory levels, providing reliable long-term sourcing options.

Q: Can I use the SN74ABTH245DWR as a substitute?

A: Yes. The SN74ABTH245DWR maintains all critical electrical parameters (32mA/64mA output current, 4.5V-5.5V supply, 3-state output, 8-bit configuration) and 20-SOIC packaging. It is actively manufactured and ROHS3 compliant.

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