CD74HCT32E Equivalent & Substitute Parts

Part Overview

The CD74HCT32E is a 4-channel OR gate logic integrated circuit manufactured by Texas Instruments, housed in a 14-pin DIP package. This component is classified as an active product and is widely used in digital logic applications requiring OR gate functionality. The part is ROHS3 compliant and suitable for through-hole mounting applications. Substitute parts are identified based on matching electrical characteristics, package compatibility, and functional equivalence to ensure seamless integration in existing designs.

Substiute Parts

CD74HCT32E

Texas InstrumentsIn Stock: 2276CD74HCT32E Datasheet

Current PartRFQ

SN74HCT32N

Texas InstrumentsIn Stock: 2494SN74HCT32N Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CD74HCT32E are qualified based on the following critical parameters:

• Logic Type: OR Gate with 4 channels and 2 inputs per channel
• Supply Voltage Range: 4.5V ~ 5.5V
• Package Type: 14-DIP through-hole configuration
• Output Current Capability: 4mA high and low
• Input Logic Levels: 0.8V low threshold, 2V high threshold
• RoHS3 Compliance and REACH Unaffected status

The SN74HCT32N meets all functional and electrical requirements for direct substitution, with identical logic configuration, package format, and compliance certifications. Variations in propagation delay and operating temperature range are within acceptable tolerances for OR gate applications.

Parameter Comparison

Engineering Selection Recommendations

Both the CD74HCT32E and SN74HCT32N are active products with ROHS3 compliance and REACH Unaffected status, making them suitable for current design implementations. The SN74HCT32N demonstrates faster propagation delay (22ns versus 24ns) and is available in equivalent inventory quantities. Selection between these parts should be based on operating temperature requirements: the CD74HCT32E supports extended temperature operation from -55°C to 125°C, while the SN74HCT32N operates within the -40°C to 85°C range. For applications requiring the full temperature specification of the CD74HCT32E, direct substitution with SN74HCT32N is not recommended. For standard industrial temperature ranges, both parts are functionally equivalent.

Frequently Asked Questions (FAQ)

Q: Can SN74HCT32N replace CD74HCT32E in all applications?

A: Both parts share identical logic configuration, supply voltage range, output current capability, and input logic levels. The primary difference is operating temperature range. SN74HCT32N is suitable for applications operating between -40°C and 85°C. If your application requires the extended -55°C to 125°C range of the CD74HCT32E, substitution is not appropriate.

Q: Are the package dimensions identical?

A: Yes. Both parts use the 14-DIP (0.300", 7.62mm) package format with through-hole mounting, ensuring identical PCB footprint and assembly compatibility.

Q: What is the significance of the propagation delay difference?

A: The SN74HCT32N exhibits 22ns propagation delay at 5.5V compared to 24ns for the CD74HCT32E at 4.5V. This 2ns difference is negligible for most OR gate applications and represents improved performance in the substitute part.

Q: Are both parts RoHS compliant?

A: Yes. Both CD74HCT32E and SN74HCT32N are ROHS3 compliant and REACH Unaffected, meeting current environmental and regulatory requirements.

Q: What are the key electrical parameters that determine substitution eligibility?

A: Substitution is determined by matching logic type (4-channel OR gate), supply voltage range (4.5V ~ 5.5V), output current (4mA), input logic levels (0.8V low, 2V high), and package format (14-DIP). Both parts meet these criteria.