74HC21PW,112 Equivalent & Substitute Parts

Part Overview

The 74HC21PW,112 is a dual 4-input AND gate logic IC manufactured by Nexperia USA Inc. in 14-TSSOP surface mount packaging. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The part operates across a 2V to 6V supply voltage range with propagation delays of 19ns at 6V with 50pF load, suitable for general-purpose logic applications requiring dual AND gate functionality.

Key Parameters

Parameter	Value
Logic Type	AND Gate
Number of Circuits	2
Number of Inputs	4
Voltage - Supply	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
Max Propagation Delay @ 6V, 50pF	19ns
Operating Temperature	-40°C ~ 125°C
Package / Case	14-TSSOP (0.173", 4.40mm Width)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the 74HC21PW,112 is determined by strict equivalence across the following critical parameters:

Logic Type: AND Gate with 2 channels and 4 inputs per channel
Voltage Supply Range: 2V ~ 6V
Propagation Delay: 19ns @ 6V, 50pF
Package Type: 14-TSSOP surface mount
Input/Output Logic Levels and Current Specifications
RoHS3 Compliance and MSL Level 1

Substitute parts are grouped into two categories:

Direct Substitutes (Automotive Grade): SN74HC21QPWRG4Q1 and SN74HC21QPWRQ1 from Texas Instruments. These parts meet all electrical and mechanical parameters of the original part and include AEC-Q100 automotive qualification, extending the operating temperature range to -40°C ~ 125°C.

Similar Substitutes (Commercial Grade): SN74HC21PW, SN74HC21PWR, and SN74HC21PWT from Texas Instruments. These parts match all electrical specifications but operate within a reduced temperature range of -40°C ~ 85°C and lack automotive qualification.

Parameter Comparison

Parameter	74HC21PW,112 (Nexperia)	SN74HC21QPWRG4Q1 (TI)	SN74HC21QPWRQ1 (TI)	SN74HC21PW (TI)	SN74HC21PWR (TI)	SN74HC21PWT (TI)
Logic Type	AND Gate	AND Gate	AND Gate	AND Gate	AND Gate	AND Gate
Number of Circuits	2	2	2	2	2	2
Number of Inputs	4	4	4	4	4	4
Voltage - Supply	2V ~ 6V	2V ~ 6V	2V ~ 6V	2V ~ 6V	2V ~ 6V	2V ~ 6V
Current - Quiescent (Max)	2 µA	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	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	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	1.5V ~ 4.2V
Max Propagation Delay @ 6V, 50pF	19ns	19ns	19ns	19ns	19ns	19ns
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Package / Case	14-TSSOP (0.173", 4.40mm Width)	14-TSSOP (0.173", 4.40mm Width)	14-TSSOP (0.173", 4.40mm Width)	14-TSSOP (0.173", 4.40mm Width)	14-TSSOP (0.173", 4.40mm Width)	14-TSSOP (0.173", 4.40mm Width)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Obsolete	Active	Active	Discontinued at DiGi Electronics	Active	Discontinued at DiGi Electronics
Grade	Commercial	Automotive	Automotive	Commercial	Commercial	Commercial
Qualification	None Listed	AEC-Q100	AEC-Q100	None Listed	None Listed	None Listed

Engineering Selection Recommendations

For applications requiring full temperature range operation (-40°C ~ 125°C) with active product status and long-term availability, SN74HC21QPWRG4Q1 and SN74HC21QPWRQ1 are the primary substitutes. Both parts are manufactured by Texas Instruments with AEC-Q100 automotive qualification, ensuring compliance with automotive reliability standards. SN74HC21QPWRG4Q1 is supplied in Tape & Reel packaging, while SN74HC21QPWRQ1 is supplied in Cut Tape & Digi-Reel format.

For applications limited to -40°C ~ 85°C operating temperature, SN74HC21PWR provides an active product alternative with commercial-grade qualification. SN74HC21PW and SN74HC21PWT are discontinued at DiGi Electronics and should not be selected for new designs requiring long-term supply assurance.

All substitute parts maintain electrical and mechanical compatibility with the original 74HC21PW,112, including identical logic function, propagation delay, input/output current specifications, and 14-TSSOP package dimensions.

Frequently Asked Questions (FAQ)

Q: Can SN74HC21QPWRG4Q1 or SN74HC21QPWRQ1 be used as direct replacements for 74HC21PW,112?

A: Yes. Both parts are direct substitutes. They match all electrical parameters, package type, and logic function. The primary difference is extended operating temperature range (-40°C ~ 125°C versus the original specification) and AEC-Q100 automotive qualification, which provides additional reliability assurance.

Q: What is the difference between SN74HC21QPWRG4Q1 and SN74HC21QPWRQ1?

A: Both parts are electrically and functionally identical. The difference is packaging format: SN74HC21QPWRG4Q1 is supplied in Tape & Reel (TR), while SN74HC21QPWRQ1 is supplied in Cut Tape (CT) & Digi-Reel format. Selection depends on assembly process requirements and order quantity.

Q: Why do SN74HC21PW, SN74HC21PWR, and SN74HC21PWT have a reduced operating temperature range?

A: These commercial-grade parts are specified for -40°C ~ 85°C operation. Applications requiring the full -40°C ~ 125°C range must use the automotive-qualified SN74HC21QPWRG4Q1 or SN74HC21QPWRQ1.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and MSL Level 1 (Unlimited moisture sensitivity), matching the original part's environmental specifications.

Q: Can I use SN74HC21PW or SN74HC21PWT for new designs?

A: No. Both parts are discontinued at DiGi Electronics. For new designs, use SN74HC21PWR (active, commercial grade) or SN74HC21QPWRG4Q1/SN74HC21QPWRQ1 (active, automotive grade with extended temperature range).

Q: Is the 14-TSSOP package identical across all parts?

A: Yes. All parts use the same 14-TSSOP package with 0.173" width and 4.40mm dimensions, ensuring mechanical compatibility in PCB layouts and assembly processes.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message