SN74HC03D NAND Gate IC Equivalent & Substitute Parts

Part Overview

The SN74HC03D is a 4-channel 2-input NAND gate logic IC manufactured by Texas Instruments in a 14-SOIC surface mount package with open drain output configuration. This part is currently discontinued at DiGi Electronics, making equivalent substitute parts necessary for ongoing production and maintenance applications. The 74HC03 series provides standard NAND logic functionality across the 2V to 6V supply voltage range with open drain outputs suitable for wired-OR applications.

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 SN74HC03D is determined by strict equivalence across the following critical parameters:

Logic configuration: 4-channel 2-input NAND gate with open drain output
Package type: 14-SOIC surface mount form factor
Supply voltage range: 2V to 6V operation
Output current capability: 5.2mA maximum sink current
Input logic thresholds: Low 0.5V ~ 1.8V, High 1.5V ~ 4.2V
Quiescent current: Maximum 2 µA
Propagation delay: Maximum 23ns at 6V with 50pF load
Operating temperature range: -40°C to 85°C minimum
Compliance: ROHS3 and REACH requirements

Substitute parts must maintain identical logic functionality, package dimensions, and electrical performance within these specified ranges. Parts with extended temperature ranges or improved propagation delay characteristics remain functionally compatible when other parameters align.

Parameter Comparison

Part Number	Manufacturer	Product Status	Packaging	Quiescent Current (Max)	Propagation Delay @ 6V, 50pF	Operating Temperature	Inventory
SN74HC03D	Texas Instruments	Discontinued	Tube	2 µA	23ns	-40°C ~ 85°C	1908 Pcs
CD74HC03M96	Texas Instruments	Active	Tape & Reel (TR)	2 µA	17ns	-55°C ~ 125°C	3742 Pcs
SN74HC03DR	Texas Instruments	Active	Cut Tape (CT) & Digi-Reel®	2 µA	23ns	-40°C ~ 85°C	5502 Pcs
MC74HC03ADR2G	onsemi	Active	Cut Tape (CT) & Digi-Reel®	1 µA	20ns	-55°C ~ 125°C	11075 Pcs
MC74HC03ADG	onsemi	Active	Tube	1 µA	20ns	-55°C ~ 125°C	1107 Pcs
74HC03D,653	NXP Semiconductors	Active	Bulk	Not specified	Not specified	Not specified	11803 Pcs

Engineering Selection Recommendations

All listed substitute parts maintain functional equivalence to the SN74HC03D across the core 74HC03 logic specification. Selection among active alternatives depends on application-specific requirements:

SN74HC03DR provides direct Texas Instruments sourcing with identical electrical performance and temperature range to the original SN74HC03D, available in Cut Tape & Digi-Reel packaging with 5502 units in stock.

CD74HC03M96 offers improved propagation delay (17ns versus 23ns) and extended operating temperature range (-55°C to 125°C) from Texas Instruments, supplied in Tape & Reel format with 3742 units available.

MC74HC03ADR2G and MC74HC03ADG are onsemi equivalents with reduced quiescent current (1 µA versus 2 µA), improved propagation delay (20ns), and extended temperature range (-55°C to 125°C). MC74HC03ADR2G is available in Cut Tape & Digi-Reel format (11075 units), while MC74HC03ADG is supplied in Tube packaging (1107 units).

74HC03D,653 from NXP Semiconductors is listed as a manufacturer-recommended alternative with the highest inventory availability (11803 units) in Bulk packaging, though detailed electrical specifications are not provided in the sourcing data.

All substitute parts maintain ROHS3 compliance, REACH unaffected status, and MSL 1 (Unlimited) moisture sensitivity rating. Package form factor remains 14-SOIC across all alternatives, ensuring PCB layout compatibility.

Frequently Asked Questions (FAQ)

Q: Can I use CD74HC03M96 as a direct replacement for SN74HC03D?

A: Yes. CD74HC03M96 maintains all core electrical parameters of the 74HC03 logic specification. The improved propagation delay (17ns versus 23ns) and extended temperature range (-55°C to 125°C) represent performance enhancements rather than deviations. The primary difference is packaging format: CD74HC03M96 is supplied in Tape & Reel rather than Tube.

Q: What is the difference between onsemi MC74HC03ADR2G and MC74HC03ADG?

A: Both parts are electrically identical onsemi 74HC03 equivalents with 1 µA quiescent current and 20ns propagation delay. The difference is packaging: MC74HC03ADR2G is supplied in Cut Tape & Digi-Reel format, while MC74HC03ADG is supplied in Tube format. Select based on your assembly process requirements.

Q: Are there temperature range limitations when substituting the SN74HC03D?

A: The SN74HC03D operates from -40°C to 85°C. Substitute parts with extended ranges (-55°C to 125°C) such as CD74HC03M96, MC74HC03ADR2G, and MC74HC03ADG are fully compatible for applications within the original temperature specification. Extended range parts do not introduce compatibility issues in standard -40°C to 85°C applications.

Q: Does the 14-SOIC package remain consistent across all substitutes?

A: Yes. All substitute parts use the 14-SOIC (0.154", 3.90mm Width) surface mount package. PCB footprints and assembly processes require no modification.

Q: What is the significance of open drain output in the 74HC03 configuration?

A: Open drain outputs allow multiple gate outputs to be wired together for wired-OR logic functions. All substitute parts maintain this open drain feature with 5.2mA maximum sink current, preserving application compatibility.

Q: Which substitute offers the best availability?

A: MC74HC03ADR2G from onsemi has the highest inventory (11075 units), followed by 74HC03D,653 from NXP (11803 units). Both are suitable for high-volume production requirements.

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