SN74ACT245DWRG4 Equivalent & Substitute Parts

Part Overview

The SN74ACT245DWRG4 is a non-inverting transceiver logic IC manufactured by Texas Instruments, featuring 1 element with 8 bits per element and 3-state output capability. This device operates within a 4.5V to 5.5V supply voltage range and is housed in a 20-SOIC package. The part is currently discontinued at DiGi Electronics, making equivalent and substitute parts essential for ongoing design support and procurement.

Key Parameters

Parameter	Value
Manufacturer Part Number	SN74ACT245DWRG4
Manufacturer	Texas Instruments
Base Product Number	74ACT245
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
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the SN74ACT245DWRG4 is determined by strict equivalence across the following critical parameters:

Base product number: 74ACT245
Logic type: Transceiver, Non-Inverting
Number of elements: 1
Number of bits per element: 8
Output type: 3-State
Output current capability: 24mA (high and low)
Supply voltage range: 4.5V ~ 5.5V
Operating temperature range: -40°C ~ 85°C
Package type: 20-SOIC with identical physical dimensions
RoHS3 compliance

All substitute parts listed maintain these electrical and mechanical specifications. Differences in packaging format (Cut Tape, Tube, Digi-Reel) and moisture sensitivity level do not affect functional equivalence in circuit operation.

Parameter Comparison

Parameter	SN74ACT245DWRG4 (TI)	SN74ACT245DWR (TI)	74ACT245SC (onsemi)	MC74ACT245DWR2G (onsemi)	MC74ACT245DWG (onsemi)	74ACT245SCX (onsemi)
Manufacturer	Texas Instruments	Texas Instruments	onsemi	onsemi	onsemi	onsemi
Logic Type	Transceiver, Non-Inverting	Transceiver, Non-Inverting	Transceiver, Non-Inverting	Transceiver, Non-Inverting	Transceiver, Non-Inverting	Transceiver, Non-Inverting
Number of Elements	1	1	1	1	1	1
Number of Bits per Element	8	8	8	8	8	8
Output Type	3-State	3-State	3-State	3-State	3-State	3-State
Current - Output High, Low	24mA, 24mA	24mA, 24mA	24mA, 24mA	24mA, 24mA	24mA, 24mA	24mA, 24mA
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
Operating Temperature	-40°C ~ 85°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	20-SOIC	20-SOIC	20-SOIC	20-SOIC	20-SOIC
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Discontinued	Active	Active	Active	Active	Active
MSL Rating	1 (Unlimited)	1 (Unlimited)	3 (168 Hours)	3 (168 Hours)	3 (168 Hours)	3 (168 Hours)

Engineering Selection Recommendations

For applications currently using the SN74ACT245DWRG4, the following substitution hierarchy is based on product status and compliance:

Primary Recommendation: SN74ACT245DWR (Texas Instruments) — Maintains original manufacturer continuity with identical electrical specifications and MSL rating of 1. Product status is active with established supply availability.

Secondary Recommendations: MC74ACT245DWG (onsemi) — Manufacturer-recommended equivalent with active product status and highest inventory availability (3995 pcs). MSL rating of 3 is suitable for standard storage and handling conditions.

Tertiary Options: 74ACT245SCX (onsemi), MC74ACT245DWR2G (onsemi), and 74ACT245SC (onsemi) — All maintain full electrical equivalence and ROHS3 compliance. Selection among these should be based on packaging format requirements (Cut Tape, Tube, or Digi-Reel) and inventory availability for your procurement timeline.

All listed substitutes are REACH unaffected and carry identical ECCN and HTSUS classifications, ensuring regulatory compliance across supply chain transitions.

Frequently Asked Questions (FAQ)

Q: Can I use onsemi parts as direct replacements for the Texas Instruments SN74ACT245DWRG4?

A: Yes. All onsemi 74ACT245 variants listed maintain identical electrical specifications including logic type, bit configuration, output current, supply voltage, and operating temperature range. The 20-SOIC package dimensions are identical across manufacturers. Functional compatibility is assured.

Q: What is the difference between the various onsemi part numbers (MC74ACT245DWG, MC74ACT245DWR2G, 74ACT245SCX, 74ACT245SC)?

A: These parts are electrically identical. Differences exist only in packaging format and moisture sensitivity level. MC74ACT245DWG and 74ACT245SC are supplied in Tube packaging. MC74ACT245DWR2G and 74ACT245SCX are supplied in Cut Tape (CT) & Digi-Reel format. MSL ratings differ (3 vs. 1) but do not affect circuit performance under standard handling and storage conditions.

Q: Why is the SN74ACT245DWR preferred over other substitutes?

A: The SN74ACT245DWR maintains the original Texas Instruments manufacturer source and carries an MSL rating of 1 (Unlimited), matching the original part's moisture sensitivity specification. This minimizes supply chain variables when transitioning from the discontinued SN74ACT245DWRG4.

Q: Are there any pin configuration differences between these parts?

A: No. All listed parts use the 20-SOIC package with identical pinout and pin assignments. Direct PCB substitution is possible without layout modifications.

Q: What packaging options are available for the 74ACT245 transceiver?

A: Substitute parts are available in three packaging formats: Tube (MC74ACT245DWG, 74ACT245SC), Cut Tape & Digi-Reel (SN74ACT245DWR, MC74ACT245DWR2G, 74ACT245SCX). Selection should align with your assembly process and procurement volume requirements.

Q: Do all substitutes meet RoHS3 compliance?

A: Yes. All listed substitute parts are ROHS3 compliant and REACH unaffected, maintaining regulatory compliance for EU and international markets.

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