CD74HCT245EE4 Equivalent & Substitute Parts

Part Overview

The CD74HCT245EE4 is a high-speed CMOS logic transceiver manufactured by Texas Instruments, classified as a non-inverting 1-element, 8-bit transceiver with 3-state output capability. The device is housed in a 20-pin DIP package and operates across the 4.5V to 5.5V supply voltage range with an operating temperature range of -55°C to 125°C.

The CD74HCT245EE4 maintains Active product status and is ROHS3 compliant, making it suitable for current production applications. Identifying equivalent and substitute parts is necessary when addressing supply chain constraints, inventory optimization, or when sourcing from alternative manufacturers while maintaining identical electrical and mechanical performance.

Substiute Parts

CD74HCT245EE4

Texas InstrumentsIn Stock: 1191CD74HCT245EE4 Datasheet

Current PartRFQ

CD74HCT245E

Harris CorporationIn Stock: 2026CD74HCT245E Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CD74HCT245EE4 is determined by strict equivalence across the following critical parameters:

Electrical Parameters: Logic type (Transceiver, Non-Inverting), number of elements (1), bits per element (8), output type (3-State), output current specifications (4mA, 4mA), and supply voltage range (4.5V ~ 5.5V) must remain identical.

Thermal Parameters: Operating temperature range (-55°C ~ 125°C) must be maintained.

Mechanical Parameters: Package type (20-DIP), mounting method (Through Hole), and physical dimensions (0.300", 7.62mm) must be identical.

Series Designation: The 74HCT series classification must be preserved.

The CD74HCT245E from Harris Corporation meets all electrical, thermal, and mechanical requirements for direct substitution. However, product status and compliance certifications differ and must be evaluated for specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

The CD74HCT245E from Harris Corporation is electrically and mechanically equivalent to the CD74HCT245EE4 across all specified parameters. However, the following compliance and status considerations apply:

Product Status: The CD74HCT245EE4 maintains Active status, indicating ongoing manufacturer support and availability. The CD74HCT245E is classified as Obsolete, indicating discontinued production and limited future availability.

Regulatory Compliance: The CD74HCT245EE4 is ROHS3 compliant, meeting current environmental and hazardous substance restrictions. The CD74HCT245E is RoHS non-compliant, which may restrict its use in applications subject to RoHS regulations or in regions where RoHS compliance is mandated.

Export Classification: Both parts share identical ECCN (EAR99) and HTSUS (8542.39.0001) classifications, indicating equivalent export control and tariff treatment.

For new designs or applications requiring long-term supply assurance and regulatory compliance, the CD74HCT245EE4 is the preferred selection. The CD74HCT245E may be considered only for legacy system maintenance or applications where RoHS compliance is not required and obsolete component sourcing is acceptable.

Frequently Asked Questions (FAQ)

Q: Can the CD74HCT245E be used as a direct replacement for the CD74HCT245EE4 in new designs?

A: The CD74HCT245E is electrically and mechanically equivalent and will function identically in circuit applications. However, the CD74HCT245E is obsolete and RoHS non-compliant. New designs should specify the CD74HCT245EE4 to ensure long-term availability and regulatory compliance.

Q: What are the critical parameters that must match for substitution?

A: The following parameters must be identical: logic type (Transceiver, Non-Inverting), element count (1), bits per element (8), output type (3-State), output current (4mA, 4mA), supply voltage (4.5V ~ 5.5V), operating temperature range (-55°C ~ 125°C), package type (20-DIP), and physical dimensions (0.300", 7.62mm).

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

A: Both parts use the 20-PDIP package with identical physical dimensions (0.300", 7.62mm). Pin configuration and functionality are identical.

Q: What does "Obsolete" status mean for the CD74HCT245E?

A: Obsolete status indicates that Harris Corporation has discontinued production of this part. Existing inventory may be available through secondary sources, but future availability is not guaranteed. New production runs are not available from the manufacturer.

Q: Why is RoHS compliance important for component selection?

A: RoHS (Restriction of Hazardous Substances) compliance is mandated in many regions and industries. ROHS3 compliance ensures the part meets current environmental and safety standards. Non-compliant parts may be restricted from use in regulated applications or regions with RoHS requirements.

Q: Can the CD74HCT245E be used in applications where RoHS compliance is required?

A: No. The CD74HCT245E is RoHS non-compliant and cannot be used in applications or regions where RoHS compliance is mandated. The CD74HCT245EE4 (ROHS3 compliant) must be specified instead.

Q: Are the electrical performance characteristics identical between these parts?

A: Yes. Both parts share identical electrical specifications: 4mA output current (high and low), 4.5V to 5.5V supply voltage range, and -55°C to 125°C operating temperature range. Functional performance in circuit applications is identical.