74HCT245N Equivalent & Substitute Parts

Part Overview

The 74HCT245N is a non-inverting transceiver logic integrated circuit manufactured by NXP USA Inc. in a 20-DIP package. This component functions as a single-element, 8-bit transceiver with 3-state output capability, designed for bus interface applications requiring bidirectional data transmission. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing system maintenance and new designs requiring compatible functionality.

Substiute Parts

74HCT245N,652

NXP USA Inc.In Stock: 85374HCT245N,652 Datasheet

Current PartRFQ

CD74HCT245E

Harris CorporationIn Stock: 2026CD74HCT245E Datasheet

DirectRFQ

SN74HCT245AN

Texas InstrumentsIn Stock: 973SN74HCT245AN Datasheet

MFR RecommendedRFQ

SN74HCT245N

Texas InstrumentsIn Stock: 3263SN74HCT245N Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 74HCT245N is determined by the following critical parameters:

• Logic type and function: Transceiver, Non-Inverting
• Configuration: 1 element, 8 bits per element
• Output capability: 3-State output
• Supply voltage range: 4.5V ~ 5.5V
• Package form factor: 20-DIP (0.300", 7.62mm)
• Mounting technology: Through Hole

Substitute parts must maintain identical or compatible electrical characteristics within these parameters. The following parts satisfy these substitution criteria:

Direct Substitutes (Functionally Equivalent):

• CD74HCT245E (Harris Corporation)
• SN74HCT245AN (Texas Instruments)
• SN74HCT245N (Texas Instruments)

Parameter Comparison

Engineering Selection Recommendations

SN74HCT245N (Texas Instruments) - Preferred Selection

The SN74HCT245N is the recommended substitute for new designs and system maintenance. This part maintains full electrical compatibility with the 74HCT245N,652, including identical output current specifications (6mA, 6mA) and supply voltage range (4.5V ~ 5.5V). The SN74HCT245N carries Active product status and ROHS3 compliance, ensuring long-term availability and regulatory alignment. Operating temperature range is -40°C ~ 85°C, which covers standard industrial applications. Inventory availability is substantial at 3234 units.

SN74HCT245AN (Texas Instruments) - Alternative Selection

The SN74HCT245AN provides equivalent functionality with identical electrical parameters to the primary recommendation. This part is also Active status and ROHS3 compliant. Operating temperature range is -40°C ~ 85°C. Inventory availability is 914 units. Selection between SN74HCT245N and SN74HCT245AN depends on packaging preference (Tube vs. standard packaging).

CD74HCT245E (Harris Corporation) - Compatibility Consideration

The CD74HCT245E is functionally equivalent but exhibits reduced output current specifications (4mA, 4mA compared to 6mA, 6mA). This part is classified as obsolete and RoHS non-compliant. Use of this substitute is limited to applications where reduced output current is acceptable and RoHS compliance is not required. Operating temperature range extends to -55°C, providing wider low-temperature operation if needed.

Frequently Asked Questions (FAQ)

Q: Can the SN74HCT245N directly replace the 74HCT245N,652 without circuit modification?

A: Yes. The SN74HCT245N maintains identical logic type, element configuration, bit width, output type, supply voltage range, and package form factor. No circuit modification is required for direct substitution in applications operating within the -40°C ~ 85°C temperature range.

Q: What is the significance of the output current difference between the 74HCT245N,652 (6mA) and CD74HCT245E (4mA)?

A: Output current rating determines the maximum load-driving capability of the transceiver. The 74HCT245N,652 and recommended Texas Instruments substitutes (SN74HCT245N, SN74HCT245AN) provide 6mA output current. The CD74HCT245E provides 4mA. Selection of CD74HCT245E is appropriate only when circuit design accommodates the reduced current specification.

Q: Are all substitute parts available in the same 20-DIP package?

A: Yes. All substitute parts listed are available in the 20-DIP (0.300", 7.62mm) through-hole package, ensuring mechanical and electrical compatibility with existing PCB designs.

Q: What is the difference between SN74HCT245N and SN74HCT245AN?

A: Both parts are manufactured by Texas Instruments and provide identical electrical specifications. The primary difference is packaging format: SN74HCT245N is supplied in Tube packaging, while SN74HCT245AN is supplied in standard packaging. Functional performance is equivalent.

Q: Why is the 74HCT245N,652 classified as obsolete?

A: Obsolete status indicates the part is no longer manufactured by the original supplier (NXP USA Inc.). Active alternatives from Texas Instruments (SN74HCT245N, SN74HCT245AN) provide continued access to equivalent functionality with modern product support and compliance certifications.

Q: Is RoHS compliance a factor in substitute selection?

A: RoHS compliance status should be evaluated based on application requirements and regulatory jurisdiction. The recommended substitutes (SN74HCT245N, SN74HCT245AN) are ROHS3 compliant. The CD74HCT245E is RoHS non-compliant and should be selected only when RoHS compliance is not a requirement.