CD74AC32EE4 Equivalent & Substitute Parts

Part Overview

The CD74AC32EE4 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 currently in stock with 921 units available. The device operates across a wide supply voltage range of 1.5V to 5.5V and is suitable for digital logic applications requiring OR gate functionality.

Substitute parts become necessary when the primary part reaches end-of-life status, inventory depletion, or when design requirements permit the use of functionally equivalent alternatives that meet the same electrical and mechanical specifications.

Key Parameters

Parameter	Value
Logic Type	OR Gate
Number of Circuits	4
Number of Inputs	2
Voltage - Supply	1.5V ~ 5.5V
Current - Quiescent (Max)	4 µA
Current - Output High, Low	24mA, 24mA
Input Logic Level - Low	0.3V ~ 1.65V
Input Logic Level - High	1.2V ~ 3.85V
Max Propagation Delay @ V, Max CL	9.5ns @ 5V, 50pF
Operating Temperature	-55°C ~ 125°C
Mounting Type	Through Hole
Package / Case	14-DIP (0.300", 7.62mm)
Supplier Device Package	14-PDIP

Substitute Part Grouping Explanation

Substitution eligibility for the CD74AC32EE4 is determined by strict equivalence across the following critical parameters:

Functional Parameters:

Logic Type: OR Gate
Number of Circuits: 4
Number of Inputs: 2

Electrical Parameters:

Voltage - Supply: 1.5V ~ 5.5V
Current - Quiescent (Max): 4 µA
Current - Output High, Low: 24mA, 24mA
Input Logic Level - Low: 0.3V ~ 1.65V
Input Logic Level - High: 1.2V ~ 3.85V
Max Propagation Delay @ V, Max CL: 9.5ns @ 5V, 50pF
Operating Temperature: -55°C ~ 125°C

Mechanical Parameters:

Mounting Type: Through Hole
Package / Case: 14-DIP (0.300", 7.62mm)
Supplier Device Package: 14-PDIP

The CD74AC32E qualifies as a parametric equivalent based on complete alignment with all electrical and mechanical specifications listed above.

Parameter Comparison

Parameter	CD74AC32EE4 (Texas Instruments)	CD74AC32E (Harris Corporation)
Logic Type	OR Gate	OR Gate
Number of Circuits	4	4
Number of Inputs	2	2
Voltage - Supply	1.5V ~ 5.5V	1.5V ~ 5.5V
Current - Quiescent (Max)	4 µA	4 µA
Current - Output High, Low	24mA, 24mA	24mA, 24mA
Input Logic Level - Low	0.3V ~ 1.65V	0.3V ~ 1.65V
Input Logic Level - High	1.2V ~ 3.85V	1.2V ~ 3.85V
Max Propagation Delay @ V, Max CL	9.5ns @ 5V, 50pF	9.5ns @ 5V, 50pF
Operating Temperature	-55°C ~ 125°C	-55°C ~ 125°C
Mounting Type	Through Hole	Through Hole
Package / Case	14-DIP (0.300", 7.62mm)	14-DIP (0.300", 7.62mm)
Supplier Device Package	14-PDIP	14-PDIP
Product Status	Active	Obsolete
RoHS Status	ROHS3 Compliant	RoHS non-compliant

Engineering Selection Recommendations

Primary Selection: CD74AC32EE4

The CD74AC32EE4 is the recommended primary choice for new designs and applications. This part carries Active product status, ensuring long-term availability and supply chain stability. The device is ROHS3 compliant, meeting current environmental and regulatory requirements for commercial and industrial applications.

Alternative Selection: CD74AC32E

The CD74AC32E is electrically and mechanically equivalent to the CD74AC32EE4 across all specified parameters. However, this part is classified as Obsolete and is non-compliant with RoHS standards. The CD74AC32E is suitable only for legacy system maintenance, repair, or applications where RoHS compliance is not required. Inventory availability is higher at 2520 units, which may support extended production runs for existing products.

Compliance Considerations:

Applications subject to RoHS directives, REACH regulations, or environmental compliance requirements must use the CD74AC32EE4. The CD74AC32E should be reserved for non-regulated applications or systems already in production with established exemptions.

Frequently Asked Questions (FAQ)

Q: Can the CD74AC32E be used as a direct replacement for the CD74AC32EE4 in new designs?

A: The CD74AC32E is electrically and mechanically equivalent but carries Obsolete status and is RoHS non-compliant. New designs should specify the CD74AC32EE4 to ensure regulatory compliance and long-term supply availability.

Q: What are the key differences between these two parts?

A: The CD74AC32EE4 and CD74AC32E are identical in electrical performance and physical packaging. The primary differences are product status (Active vs. Obsolete) and RoHS compliance (ROHS3 Compliant vs. non-compliant).

Q: Are there any pin-to-pin compatibility concerns?

A: Both parts use the 14-PDIP package with identical pin configurations. Pin-to-pin compatibility is complete, and no circuit board modifications are required for substitution.

Q: What is the operating temperature range for both parts?

A: Both the CD74AC32EE4 and CD74AC32E operate across the same temperature range of -55°C to 125°C, ensuring thermal compatibility in equivalent applications.

Q: Can the CD74AC32E be used in applications requiring RoHS compliance?

A: No. The CD74AC32E is RoHS non-compliant and cannot be used in applications subject to RoHS directives. The CD74AC32EE4 must be specified for RoHS-compliant applications.

Q: What is the propagation delay specification for these logic gates?

A: Both parts have a maximum propagation delay of 9.5 nanoseconds at 5V with a 50pF load, ensuring equivalent timing performance in digital logic circuits.

Q: Are both parts available in the same packaging format?

A: Yes. Both the CD74AC32EE4 and CD74AC32E are supplied in 14-DIP (0.300", 7.62mm) through-hole packages, with identical mechanical dimensions and pin spacing.

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