SN74ACT245PW Equivalent & Substitute Parts

Part Overview

The SN74ACT245PW is a non-inverting transceiver logic IC manufactured by Texas Instruments, designed for 8-bit bidirectional data transfer with 3-state output capability. Operating within a 4.5V to 5.5V supply range, this component is housed in a 20-TSSOP surface mount package. The SN74ACT245PW is currently discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives that maintain identical electrical and mechanical specifications for seamless circuit integration.

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)
Mounting Type	Surface Mount
Package / Case	20-TSSOP (0.173", 4.40mm Width)
Series	74ACT
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the SN74ACT245PW 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 - Output High, Low: 24mA, 24mA
Voltage - Supply: 4.5V ~ 5.5V
Operating Temperature: -40°C ~ 85°C (TA)
Package / Case: 20-TSSOP (0.173", 4.40mm Width)
Series: 74ACT
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)

All substitute parts listed maintain identical electrical performance and mechanical compatibility. Substitutes are categorized by product status and packaging format to facilitate procurement decisions based on availability and application requirements.

Parameter Comparison

Part Number	Manufacturer	Product Status	Packaging	Logic Type	Output Type	Current (mA)	Voltage Supply	Temp Range	Package	RoHS
SN74ACT245PW	Texas Instruments	Discontinued	Plastic Bag	Transceiver, Non-Inverting	3-State	24, 24	4.5V ~ 5.5V	-40°C ~ 85°C	20-TSSOP	ROHS3
SN74ACT245PWR	Texas Instruments	Active	Cut Tape (CT) & Digi-Reel®	Transceiver, Non-Inverting	3-State	24, 24	4.5V ~ 5.5V	-40°C ~ 85°C	20-TSSOP	ROHS3
74ACT245MTCX	onsemi	Active	Cut Tape (CT) & Digi-Reel®	Transceiver, Non-Inverting	3-State	24, 24	4.5V ~ 5.5V	-40°C ~ 85°C	20-TSSOP	ROHS3
MC74ACT245DTR2G	onsemi	Active	Tape & Reel (TR)	Transceiver, Non-Inverting	3-State	24, 24	4.5V ~ 5.5V	-40°C ~ 85°C	20-TSSOP	ROHS3
74ACT245MTC	onsemi	Obsolete	Tube	Transceiver, Non-Inverting	3-State	24, 24	4.5V ~ 5.5V	-40°C ~ 85°C	20-TSSOP	ROHS3
MC74ACT245DTG	onsemi	Obsolete	Tube	Transceiver, Non-Inverting	3-State	24, 24	4.5V ~ 5.5V	-40°C ~ 85°C	20-TSSOP	ROHS3

Engineering Selection Recommendations

For applications requiring immediate replacement of the discontinued SN74ACT245PW, the SN74ACT245PWR (Texas Instruments, Active status) provides direct functional equivalence with current market availability. This part maintains identical electrical specifications and 20-TSSOP packaging while offering the advantage of active product status and established supply chain presence.

The onsemi alternatives 74ACT245MTCX and MC74ACT245DTR2G are functionally equivalent substitutes with active product status. Selection between these options depends on packaging requirements: 74ACT245MTCX is supplied in Cut Tape & Digi-Reel format, while MC74ACT245DTR2G is supplied in Tape & Reel format. Both maintain ROHS3 compliance and identical electrical performance.

The obsolete variants 74ACT245MTC and MC74ACT245DTG remain parametrically equivalent but are not recommended for new designs due to discontinued status. These parts may be considered only for legacy system maintenance where existing inventory is available.

All listed substitutes are ROHS3 compliant with MSL rating of 1 (Unlimited), ensuring compatibility with standard manufacturing and storage protocols.

Frequently Asked Questions (FAQ)

Q: Can SN74ACT245PWR directly replace SN74ACT245PW in existing designs?

A: Yes. Both parts are electrically and mechanically identical, differing only in packaging format (Digi-Reel vs. Plastic Bag). The 20-TSSOP footprint, pin configuration, and electrical specifications are identical, enabling direct PCB substitution.

Q: What is the difference between the onsemi 74ACT245MTCX and MC74ACT245DTR2G?

A: Both parts are functionally equivalent with identical electrical specifications and 20-TSSOP packaging. The primary difference is packaging format: 74ACT245MTCX is supplied in Cut Tape & Digi-Reel format, while MC74ACT245DTR2G is supplied in Tape & Reel format. Selection depends on procurement and assembly line requirements.

Q: Why are 74ACT245MTC and MC74ACT245DTG listed if they are obsolete?

A: These parts maintain identical electrical and mechanical specifications to the SN74ACT245PW. They are included for reference in legacy system maintenance scenarios where existing inventory may be available. For new designs, active status alternatives are recommended.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 compliance certification, meeting environmental and regulatory requirements for modern electronics manufacturing.

Q: Does package format affect electrical performance?

A: No. Package format (Cut Tape, Tape & Reel, Tube, or Plastic Bag) affects only procurement, handling, and assembly logistics. Electrical specifications and performance remain identical across all packaging variants of the same part number base.

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