74ABT245CSC Equivalent & Substitute Parts

Part Overview

The 74ABT245CSC is a non-inverting transceiver logic IC manufactured by onsemi, designed for 8-bit bidirectional data transfer with 3-state output capability. This component operates within 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 equivalent and substitute parts necessary for ongoing design support and production continuity.

Key Parameters

Parameter	Value
Manufacturer Part Number	74ABT245CSC
Manufacturer	onsemi
Series	74ABT
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)
Mounting Type	Surface Mount
Product Status	Obsolete
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the 74ABT245CSC is determined by strict equivalence across the following critical parameters:

Logic Type: Transceiver, Non-Inverting
Number of Elements: 1
Number of Bits per Element: 8
Output Type: 3-State
Voltage - Supply: 4.5V ~ 5.5V
Operating Temperature: -40°C ~ 85°C (TA)
Current - Output High, Low: 32mA, 64mA
Mounting Type: Surface Mount
Package / Case: 20-SOIC (0.295", 7.50mm Width)

Substitute parts are grouped into two categories:

Direct Substitutes (Identical Electrical and Mechanical Specifications): Parts that match all critical parameters and package specifications, differing only in manufacturer, product status (active vs. obsolete), or packaging format (tube, tape & reel, cut tape).

Similar Substitutes (Minor Parameter Variations): Parts that maintain core functionality but may differ in base product number (74ABT2245 vs. 74ABT245), series designation (74ABTH vs. 74ABT), or package width specifications while preserving electrical performance within the same operating envelope.

Parameter Comparison

Part Number	Manufacturer	Series	Logic Type	Output Current (High/Low)	Supply Voltage	Operating Temp	Package	Product Status	RoHS Status
74ABT245CSC	onsemi	74ABT	Transceiver, Non-Inverting	32mA, 64mA	4.5V ~ 5.5V	-40°C ~ 85°C	20-SOIC	Obsolete	REACH Unaffected
SN74ABT245BDW	Texas Instruments	74ABT	Transceiver, Non-Inverting	32mA, 64mA	4.5V ~ 5.5V	-40°C ~ 85°C	20-SOIC	Active	ROHS3 Compliant
74ABT245D,623	Nexperia USA Inc.	74ABT	Transceiver, Non-Inverting	32mA, 64mA	4.5V ~ 5.5V	-40°C ~ 85°C	20-SO	Active	ROHS3 Compliant
SN74ABT2245DW	Texas Instruments	74ABT	Transceiver, Non-Inverting	32mA, 64mA; 12mA, 12mA	4.5V ~ 5.5V	-40°C ~ 85°C	20-SOIC	Active	ROHS3 Compliant
SN74ABT2245DWR	Texas Instruments	74ABT	Transceiver, Non-Inverting	32mA, 64mA; 12mA, 12mA	4.5V ~ 5.5V	-40°C ~ 85°C	20-SOIC	Active	ROHS3 Compliant
SN74ABT245BDWR	Texas Instruments	74ABT	Transceiver, Non-Inverting	32mA, 64mA	4.5V ~ 5.5V	-40°C ~ 85°C	20-SOIC	Active	ROHS3 Compliant
SN74ABT245BNSR	Texas Instruments	74ABT	Transceiver, Non-Inverting	32mA, 64mA	4.5V ~ 5.5V	-40°C ~ 85°C	20-SO	Active	ROHS3 Compliant
SN74ABTH245DW	Texas Instruments	74ABTH	Transceiver, Non-Inverting	32mA, 64mA	4.5V ~ 5.5V	-40°C ~ 85°C	20-SOIC	Active	ROHS3 Compliant
SN74ABTH245DWR	Texas Instruments	74ABTH	Transceiver, Non-Inverting	32mA, 64mA	4.5V ~ 5.5V	-40°C ~ 85°C	20-SOIC	Active	ROHS3 Compliant

Engineering Selection Recommendations

Primary Substitutes (Highest Compatibility):

SN74ABT245BDW and SN74ABT245BDWR from Texas Instruments are direct functional equivalents to the 74ABT245CSC. Both maintain identical electrical specifications, supply voltage range, output current ratings, and operating temperature range. These parts are active products with ROHS3 compliance, providing long-term availability and regulatory alignment. The primary difference is packaging format: BDW is supplied in tube format, while BDWR is supplied in cut tape with digi-reel.

Secondary Substitutes (Functional Equivalence with Minor Variations):

SN74ABT2245DW and SN74ABT2245DWR are functionally equivalent but based on the 74ABT2245 product line rather than 74ABT245. These parts maintain the same core transceiver functionality and electrical performance within the specified operating envelope. The output current specification includes dual ratings (32mA, 64mA and 12mA, 12mA), indicating enhanced performance characteristics. Both are active products with ROHS3 compliance.

Alternative Substitutes (Different Series):

SN74ABTH245DW and SN74ABTH245DWR represent the 74ABTH series variant, which maintains identical electrical and thermal specifications. The 74ABTH designation indicates enhanced performance characteristics within the same functional class. These parts are suitable for applications requiring the same transceiver functionality with active product status and ROHS3 compliance.

Package Variant Substitutes:

74ABT245D,623 (Nexperia), SN74ABT245BNSR (Texas Instruments) are supplied in 20-SO package format rather than 20-SOIC. The 20-SO package (0.209" width) differs from the 20-SOIC package (0.295" width), requiring PCB layout verification before substitution. Both maintain identical electrical specifications and are active products with ROHS3 compliance.

Frequently Asked Questions (FAQ)

Q: Can I substitute the 74ABT245CSC with any of the listed parts?

A: Direct substitution is possible with SN74ABT245BDW and SN74ABT245BDWR, which are electrically and mechanically identical. Other parts require verification of package compatibility and PCB layout constraints before implementation.

Q: What is the difference between 74ABT245 and 74ABT2245?

A: The 74ABT2245 is a variant of the 74ABT245 series with enhanced output current specifications. Both maintain the same core transceiver functionality and are compatible within the same operating envelope. The 74ABT2245 variants provide additional performance headroom.

Q: Does package format affect electrical performance?

A: No. Package format (tube, tape & reel, cut tape) affects only handling, storage, and assembly processes. Electrical performance remains identical across all packaging options for the same part number variant.

Q: Are 20-SOIC and 20-SO packages interchangeable?

A: No. The 20-SOIC package (0.295" width) and 20-SO package (0.209" width) have different physical dimensions. PCB footprints are not compatible. Verify your design specifications before substituting between these package types.

Q: What is the significance of the product status change from Obsolete to Active?

A: Active product status indicates ongoing manufacturer support, availability, and compliance with current regulatory standards. Obsolete parts may have limited availability and no guarantee of future supply. Substituting with active products ensures long-term design sustainability.

Q: Are all substitute parts ROHS3 compliant?

A: All listed substitute parts are ROHS3 compliant. The original 74ABT245CSC is REACH unaffected. Verify compliance requirements for your specific application before final part selection.

Q: Can I use SN74ABTH245DW as a direct replacement?

A: Yes, electrically and thermally. The 74ABTH series maintains identical specifications to the 74ABT series within the same functional class. The primary difference is the series designation, which indicates enhanced performance characteristics. Verify your application does not require specific 74ABT series documentation.

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