SN74HC03DRG4 Equivalent & Substitute Parts

Part Overview

The SN74HC03DRG4 is a NAND Gate IC with 4 channels and 2 inputs per channel, featuring open drain output configuration in a 14-SOIC surface mount package. Manufactured by Texas Instruments, this component is classified as Obsolete, which necessitates identification of active equivalent and substitute parts for ongoing design requirements and procurement needs.

Key Parameters

Parameter	Value
Logic Type	NAND Gate
Number of Circuits	4
Number of Inputs	2
Features	Open Drain
Voltage - Supply	2V ~ 6V
Current - Quiescent (Max)	2 µA
Current - Output High, Low	-, 5.2mA
Input Logic Level - Low	0.5V ~ 1.8V
Input Logic Level - High	1.5V ~ 4.2V
Max Propagation Delay @ 6V, 50pF	23ns
Operating Temperature	-40°C ~ 85°C
Package / Case	14-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the SN74HC03DRG4 is determined by strict equivalence across the following critical parameters:

Logic Type: NAND Gate (4 channels, 2 inputs)
Features: Open Drain output configuration
Package: 14-SOIC surface mount form factor
Voltage Supply Range: 2V ~ 6V
Input/Output Logic Levels: Matching threshold specifications
Mounting Type: Surface Mount

Substitute parts are grouped into three categories based on manufacturer and product status:

Parametric Equivalents (Texas Instruments): SN74HC03DR, SN74HC03DT
Direct Manufacturer Equivalent (onsemi): MC74HC03ADR2G
Manufacturer Recommended Alternatives: 74HC03D,653 (NXP Semiconductors), MC74HC03ADG (onsemi)

All listed substitutes maintain identical logic functionality, package compatibility, and core electrical specifications required for direct replacement in existing designs.

Parameter Comparison

Parameter	SN74HC03DRG4 (Main)	SN74HC03DR	SN74HC03DT	MC74HC03ADR2G	MC74HC03ADG
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments	onsemi	onsemi
Product Status	Obsolete	Active	Discontinued at DiGi Electronics	Active	Active
Logic Type	NAND Gate	NAND Gate	NAND Gate	NAND Gate	NAND Gate
Number of Circuits	4	4	4	4	4
Number of Inputs	2	2	2	2	2
Features	Open Drain	Open Drain	Open Drain	Open Drain	Open Drain
Voltage - Supply	2V ~ 6V	2V ~ 6V	2V ~ 6V	2V ~ 6V	2V ~ 6V
Current - Quiescent (Max)	2 µA	2 µA	2 µA	1 µA	1 µA
Current - Output High, Low	-, 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	23ns	23ns	23ns	20ns	20ns
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-55°C ~ 125°C	-55°C ~ 125°C
Package / Case	14-SOIC (0.154", 3.90mm Width)	14-SOIC (0.154", 3.90mm Width)	14-SOIC (0.154", 3.90mm Width)	14-SOIC (0.154", 3.90mm Width)	14-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Primary Recommendation: SN74HC03DR

The SN74HC03DR from Texas Instruments is the preferred substitute for the obsolete SN74HC03DRG4. This part maintains identical electrical specifications, operating temperature range, and propagation delay characteristics. Active product status ensures long-term availability and supply chain continuity. ROHS3 compliance and MSL Level 1 rating match the original specification.

Secondary Recommendation: MC74HC03ADR2G

The MC74HC03ADR2G from onsemi provides an active alternative with enhanced performance characteristics. Quiescent current is reduced to 1 µA (versus 2 µA), and propagation delay is improved to 20ns. Operating temperature range extends to -55°C ~ 125°C, providing broader environmental capability. This part is suitable for applications requiring superior thermal performance or lower power consumption.

Alternative: MC74HC03ADG

The MC74HC03ADG from onsemi offers identical performance to the MC74HC03ADR2G with tube packaging instead of cut tape. This option is appropriate for applications where packaging format does not constrain procurement or assembly processes.

Not Recommended: SN74HC03DT

The SN74HC03DT is discontinued at DiGi Electronics and should not be selected for new designs or long-term production requirements.

Frequently Asked Questions (FAQ)

Q: Can SN74HC03DR be used as a direct replacement for SN74HC03DRG4?

A: Yes. The SN74HC03DR is a parametric equivalent with identical logic type, channel configuration, input/output specifications, package form factor, and electrical performance. The primary difference is product status: SN74HC03DR is Active while SN74HC03DRG4 is Obsolete.

Q: What is the difference between MC74HC03ADR2G and SN74HC03DR?

A: Both parts are functionally equivalent NAND gate ICs in 14-SOIC packages. MC74HC03ADR2G offers lower quiescent current (1 µA vs. 2 µA), faster propagation delay (20ns vs. 23ns), and extended operating temperature range (-55°C ~ 125°C vs. -40°C ~ 85°C). Selection depends on application requirements for power consumption and thermal performance.

Q: Are all substitute parts RoHS compliant?

A: Yes. All listed substitute parts are ROHS3 compliant and carry MSL Level 1 (Unlimited) moisture sensitivity rating, matching the original SN74HC03DRG4 specification.

Q: Does package format differ between substitutes?

A: All substitute parts use the 14-SOIC surface mount package with identical physical dimensions (0.154", 3.90mm Width). Packaging format variations (Cut Tape, Digi-Reel, Tube, Bulk) affect procurement and handling but do not impact electrical or mechanical compatibility.

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

A: SN74HC03DR from Texas Instruments and MC74HC03ADR2G from onsemi both carry Active product status, ensuring continued manufacturing and supply chain support. Both are suitable for designs requiring long-term component availability.

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