SN74ACT245DW Equivalent & Substitute Parts

Part Overview

The SN74ACT245DW is a non-inverting transceiver logic integrated circuit manufactured by Texas Instruments, featuring 1 element with 8 bits per element and 3-state output capability in a 20-SOIC surface mount package. This part is currently discontinued at DiGi Electronics, making equivalent substitute parts necessary for ongoing design support and procurement.

The 74ACT245 series provides bidirectional data transmission with non-inverting logic levels, operating across a 4.5V to 5.5V supply voltage range and supporting industrial temperature specifications from -40°C to 85°C.

Key Parameters

Parameter	Value
Logic Type	Transceiver, Non-Inverting
Number of Elements	1
Number of Bits per Element	8
Output Type	3-State
Current - Output High, Low	24mA, 24mA
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

Substitute Part Grouping Explanation

Substitution of the SN74ACT245DW 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
Current Ratings: 24mA output high and low
Supply Voltage Range: 4.5V ~ 5.5V
Operating Temperature Range: -40°C ~ 85°C
Package: 20-SOIC surface mount
Base Product Number: 74ACT245

All substitute parts listed maintain identical electrical specifications and package geometry. Variations in packaging format (Tube vs. Cut Tape & Digi-Reel) and manufacturer do not affect functional compatibility. Moisture Sensitivity Level differences are noted but do not impact electrical substitution criteria.

Parameter Comparison

Part Number	Manufacturer	Product Status	Packaging	Logic Type	Output Current (mA)	Supply Voltage	Operating Temp (°C)	Package Type	RoHS Status	MSL Rating
SN74ACT245DW	Texas Instruments	Discontinued	Tube	Transceiver, Non-Inverting	24/24	4.5-5.5V	-40 to 85	20-SOIC	ROHS3	1
SN74ACT245DWR	Texas Instruments	Active	Cut Tape & Digi-Reel	Transceiver, Non-Inverting	24/24	4.5-5.5V	-40 to 85	20-SOIC	ROHS3	1
74ACT245SCX	onsemi	Active	Cut Tape & Digi-Reel	Transceiver, Non-Inverting	24/24	4.5-5.5V	-40 to 85	20-SOIC	ROHS3	3
MC74ACT245DWR2G	onsemi	Active	Cut Tape & Digi-Reel	Transceiver, Non-Inverting	24/24	4.5-5.5V	-40 to 85	20-SOIC	ROHS3	3
74ACT245SC	onsemi	Active	Tube	Transceiver, Non-Inverting	24/24	4.5-5.5V	-40 to 85	20-SOIC	ROHS3	3
MC74ACT245DWG	onsemi	Active	Tube	Transceiver, Non-Inverting	24/24	4.5-5.5V	-40 to 85	20-SOIC	ROHS3	3

Engineering Selection Recommendations

For designs currently using the discontinued SN74ACT245DW, the SN74ACT245DWR from Texas Instruments provides direct substitution with identical electrical and thermal specifications while maintaining active product status. This part is available in Cut Tape & Digi-Reel packaging format.

onsemi alternatives (74ACT245SCX, MC74ACT245DWR2G, 74ACT245SC, MC74ACT245DWG) are functionally equivalent across all critical electrical parameters and package geometry. All substitute parts maintain ROHS3 compliance and support the same operating temperature range. Selection between packaging formats (Tube vs. Cut Tape & Digi-Reel) depends on procurement and assembly requirements rather than electrical compatibility.

Frequently Asked Questions (FAQ)

Q: Can I substitute the SN74ACT245DW with any of the listed parts?

A: Yes. All listed parts maintain identical electrical specifications, output current ratings, supply voltage range, operating temperature range, and 20-SOIC package geometry. Substitution is electrically valid across all listed alternatives.

Q: What is the difference between Tube and Cut Tape & Digi-Reel packaging?

A: Packaging format affects procurement and assembly handling only. Tube packaging is suitable for manual assembly or lower-volume production. Cut Tape & Digi-Reel format is optimized for automated pick-and-place assembly. Electrical performance and package footprint remain identical.

Q: Does the Moisture Sensitivity Level (MSL) difference affect substitution?

A: MSL ratings specify storage and handling requirements prior to soldering. The SN74ACT245DW and SN74ACT245DWR carry MSL 1 (unlimited shelf life), while onsemi alternatives carry MSL 3 (168-hour limit after moisture exposure). This affects component storage protocols but does not impact electrical substitution or post-assembly performance.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed parts, including the original SN74ACT245DW and all substitutes, are ROHS3 compliant.

Q: Which substitute offers the best availability?

A: Current inventory levels vary. SN74ACT245DWR (Texas Instruments, 4840 pcs) and MC74ACT245DWG (onsemi, 3995 pcs) show the highest stock levels among active alternatives.

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