74HC20N,652 Equivalent & Substitute Parts

Part Overview

The 74HC20N,652 is a dual 4-input NAND gate logic integrated circuit manufactured by NXP USA Inc. in a 14-DIP through-hole package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support, maintenance, and production continuity. The 74HC20 series represents a standard logic gate family with consistent functional behavior across multiple manufacturers and package options.

Key Parameters

Parameter	Value
Logic Type	NAND Gate
Number of Circuits	2
Number of Inputs	4
Voltage Supply Range	2V ~ 6V
Current - Quiescent (Max)	2 µA
Current - Output High/Low	5.2mA / 5.2mA
Input Logic Level - Low	0.5V ~ 1.8V
Input Logic Level - High	1.5V ~ 4.2V
Operating Temperature Range	-40°C ~ 125°C
Mounting Type	Through Hole
Package / Case	14-DIP (0.300", 7.62mm)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the 74HC20N,652 is determined by the following critical parameters:

Logic Function: All substitutes must implement dual 4-input NAND gate functionality
Electrical Characteristics: Supply voltage range (2V ~ 6V), quiescent current (2 µA max), and output current (5.2mA) must be maintained
Input/Output Logic Levels: Threshold voltages must remain within specified ranges for circuit compatibility
Package Compatibility: Through-hole mounting with 14-pin DIP footprint is required for direct board-level replacement
Propagation Delay: Maximum delay specifications determine signal timing performance

Substitutes are grouped by package type: DIP packages (74HC20D,652, CD74HC20E, SN74HC20N) maintain identical through-hole footprints, while CD74HC20M offers surface-mount functionality for alternative PCB designs.

Parameter Comparison

Parameter	74HC20N,652	74HC20D,652	CD74HC20E	CD74HC20M	SN74HC20N
Manufacturer	NXP USA Inc.	NXP Semiconductors	Harris Corporation	Harris Corporation	Texas Instruments
Product Status	Obsolete	Active	Obsolete	Obsolete	Active
Logic Type	NAND Gate	NAND Gate	NAND Gate	NAND Gate	NAND Gate
Number of Circuits	2	2	2	2	2
Number of Inputs	4	4	4	4	4
Voltage Supply	2V ~ 6V	2V ~ 6V	2V ~ 6V	2V ~ 6V	2V ~ 6V
Current - Quiescent (Max)	2 µA	2 µA	2 µA	2 µA	2 µA
Current - Output High/Low	5.2mA / 5.2mA	5.2mA / 5.2mA	5.2mA / 5.2mA	5.2mA / 5.2mA	5.2mA / 5.2mA
Input Logic Level - Low	0.5V ~ 1.8V	0.5V ~ 1.8V	0.5V ~ 1.8V	0.5V ~ 1.8V	0.5V ~ 1.8V
Input Logic Level - High	1.5V ~ 4.2V	1.5V ~ 4.2V	1.5V ~ 4.2V	1.5V ~ 4.2V	1.5V ~ 4.2V
Max Propagation Delay @ 6V, 50pF	15ns	Not specified	17ns	17ns	19ns
Operating Temperature	-40°C ~ 125°C	Not specified	-55°C ~ 125°C	-55°C ~ 125°C	-40°C ~ 85°C
Mounting Type	Through Hole	Through Hole	Through Hole	Surface Mount	Through Hole
Package / Case	14-DIP (0.300", 7.62mm)	14-DIP	14-DIP (0.300", 7.62mm)	14-SOIC (0.154", 3.90mm)	14-DIP (0.300", 7.62mm)
RoHS Status	ROHS3 Compliant	Not specified	RoHS non-compliant	RoHS non-compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	Not specified	Not specified	Not Applicable

Engineering Selection Recommendations

For Direct Through-Hole Replacement (Pin-Compatible):

The 74HC20D,652 from NXP Semiconductors is the primary active substitute. It maintains identical electrical specifications and 14-DIP package footprint. This part is currently in active production status with substantial inventory availability (85,696 units), ensuring long-term supply continuity.

The SN74HC20N from Texas Instruments is an alternative active substitute with identical through-hole DIP packaging. This part maintains ROHS3 compliance and active product status. Operating temperature range is limited to -40°C ~ 85°C compared to the original -40°C ~ 125°C specification.

For Surface-Mount Applications:

The CD74HC20M provides equivalent logic functionality in a 14-SOIC surface-mount package. This option is suitable for PCB designs utilizing surface-mount assembly processes. Note that this part is obsolete and RoHS non-compliant.

Compliance Considerations:

The 74HC20D,652 and SN74HC20N maintain ROHS3 compliance, aligning with current environmental and regulatory standards. The Harris Corporation substitutes (CD74HC20E and CD74HC20M) are RoHS non-compliant and should be selected only when legacy compliance requirements apply.

Frequently Asked Questions (FAQ)

Q: Can the 74HC20D,652 directly replace the 74HC20N,652 on existing PCBs?

A: Yes. Both parts share identical electrical specifications, 14-DIP through-hole package dimensions, and logic functionality. No circuit modifications are required for direct substitution.

Q: What is the difference between the DIP and SOIC package options?

A: The 14-DIP package (74HC20N,652, 74HC20D,652, CD74HC20E, SN74HC20N) uses through-hole mounting with 0.300" pin spacing. The 14-SOIC package (CD74HC20M) uses surface-mount technology with 0.154" width. Package selection depends on PCB assembly method and available board space.

Q: Are there propagation delay differences between substitutes?

A: Yes. The 74HC20N,652 specifies 15ns maximum delay at 6V with 50pF load. The CD74HC20E and CD74HC20M specify 17ns, while the SN74HC20N specifies 19ns. These differences may affect timing-critical applications.

Q: Which substitute offers the best long-term availability?

A: The 74HC20D,652 from NXP Semiconductors is in active production status with the highest inventory level (85,696 units), providing optimal supply chain continuity.

Q: Do all substitutes meet RoHS compliance requirements?

A: No. The 74HC20D,652 and SN74HC20N are ROHS3 compliant. The CD74HC20E and CD74HC20M are RoHS non-compliant. Compliance selection depends on application regulatory requirements.

Q: What is the operating temperature range for each substitute?

A: The 74HC20N,652, 74HC20D,652, CD74HC20E, and CD74HC20M support -40°C to 125°C or -55°C to 125°C ranges. The SN74HC20N is limited to -40°C to 85°C. Temperature range selection depends on application environment specifications.

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