74ABT620D,623 Equivalent & Substitute Parts

Part Overview

The 74ABT620D,623 is a logic transceiver IC manufactured by NXP USA Inc., designed for inverting signal transmission with 8-bit per element configuration and 3-state output capability. This component operates across a 4.5V to 5.5V supply voltage range and is housed in a 20-SOIC package. The part is currently classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and component procurement.

Key Parameters

Parameter	Value
Manufacturer Part Number	74ABT620D,623
Manufacturer	NXP USA Inc.
Series	74ABT
Logic Type	Transceiver, 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)
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 74ABT620D,623 are qualified based on the following critical parameters that determine functional equivalence:

Substitution Criteria:

Logic Type: Transceiver, 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)
Mounting Type: Surface Mount
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)

The substitute parts identified below meet all electrical and mechanical parameters specified for the 74ABT620D,623. Variations in product status, manufacturer, and packaging format are noted but do not affect functional compatibility within the defined parameter set.

Parameter Comparison

Parameter	74ABT620D,623 (NXP)	SN74ABT620DW (TI)	SN74ABT620DWR (TI)	SN74ABT640DWR (TI)
Manufacturer	NXP USA Inc.	Texas Instruments	Texas Instruments	Texas Instruments
Series	74ABT	74ABT	74ABT	74ABT
Logic Type	Transceiver, Inverting	Transceiver, Inverting	Transceiver, Inverting	Transceiver, Inverting
Number of Elements	1	1	1	1
Number of Bits per Element	8	8	8	8
Output Type	3-State	3-State	3-State	3-State
Current - Output High, Low	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
Operating Temperature	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)
Package / Case	20-SOIC (0.295", 7.50mm Width)	20-SOIC (0.295", 7.50mm Width)	20-SOIC (0.295", 7.50mm Width)	20-SOIC (0.295", 7.50mm Width)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Product Status	Obsolete	Active	Discontinued at DiGi Electronics	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Packaging Format	Bulk	Tube	Bulk	Tape & Reel (TR)

Engineering Selection Recommendations

SN74ABT620DW (Texas Instruments) is the primary direct substitute. This part maintains active product status with Texas Instruments and carries identical electrical specifications and package configuration. The tube packaging format differs from the original but does not affect functional compatibility.

SN74ABT620DWR (Texas Instruments) provides parametric equivalence with identical electrical and mechanical specifications. This part is discontinued at DiGi Electronics, which may limit availability for new procurement.

SN74ABT640DWR (Texas Instruments) meets all specified electrical and mechanical parameters and maintains active product status. This part is supplied in Tape & Reel format and offers the highest current inventory availability among the identified substitutes.

All three substitute parts are ROHS3 compliant and carry MSL rating of 1 (Unlimited), matching the compliance profile of the original 74ABT620D,623.

Frequently Asked Questions (FAQ)

Q: Can SN74ABT620DW be used as a direct replacement for 74ABT620D,623?

A: Yes. Both parts share identical electrical specifications (4.5V ~ 5.5V supply, 32mA/64mA output current, -40°C ~ 85°C operating range), logic configuration (1 element, 8 bits per element, inverting transceiver with 3-state output), and package format (20-SOIC). The primary difference is manufacturer (Texas Instruments vs. NXP) and packaging format (tube vs. bulk).

Q: What is the difference between SN74ABT620DWR and SN74ABT640DWR?

A: Both parts meet the electrical and mechanical parameters required for substitution. The base product numbers differ (74ABT620 vs. 74ABT640), but both deliver identical functional specifications for this application. SN74ABT640DWR maintains active product status and higher inventory availability.

Q: Are there any compatibility concerns with the 20-SOIC package across these parts?

A: No. All substitute parts use the identical 20-SOIC (0.295", 7.50mm Width) package configuration, ensuring pin-for-pin compatibility and direct PCB mounting without modification.

Q: Does the packaging format (tube, bulk, tape & reel) affect electrical performance?

A: No. Packaging format affects only handling, storage, and procurement logistics. All three substitute parts deliver identical electrical performance regardless of packaging format.

Q: Are all substitute parts RoHS compliant?

A: Yes. All identified substitutes carry ROHS3 compliance certification, matching the original 74ABT620D,623 specification.

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