CD4049UBDR Equivalent & Substitute Parts

Part Overview

The CD4049UBDR is a 6-channel inverter logic IC manufactured by Texas Instruments in the 4000B series. This device provides basic logic inversion functionality with a 16-SOIC surface mount package. The part is currently active in production with 17,289 units in stock.

Substitute parts are necessary when the primary part becomes unavailable, when alternative packaging or lead times are required, or when design flexibility across manufacturers is needed while maintaining functional equivalence.

Key Parameters

Parameter	Value
Logic Type	Inverter
Number of Circuits	6
Number of Inputs	1
Voltage Supply Range	3V to 18V
Package Type	16-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Operating Temperature Range	-55°C to 125°C
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the CD4049UBDR is determined by the following criteria:

Functional Equivalence: All substitute parts maintain the same logic type (inverter), circuit count (6 channels), and input configuration (1 input per channel).

Electrical Compatibility: Substitute parts must operate within the specified voltage supply range (3V to 18V) and maintain compatible input/output logic levels and propagation delay characteristics.

Package Compatibility: All substitutes use the 16-SOIC package format with identical physical dimensions (0.154", 3.90mm width), ensuring direct PCB footprint compatibility.

Environmental & Compliance Standards: All parts are ROHS3 compliant, REACH unaffected, and carry MSL rating of 1 (unlimited moisture sensitivity level).

Substitution Categories:

Parametric Equivalents (Texas Instruments): CD4049UBDRE4, CD4049UBDRG4, CD4049UBDT—identical electrical specifications with different date codes or packaging variants
Direct Manufacturer Equivalent (onsemi): MC14049UBDR2G—functionally equivalent from alternative manufacturer
Manufacturer Recommended Alternatives: HEF4049BT,653 (Nexperia), MC14049 series variants (onsemi), NLV14049 series (onsemi)—approved cross-references with minor parameter variations

Parameter Comparison

Part Number	Manufacturer	Product Status	Voltage Supply	Quiescent Current (Max)	Output Current High/Low	Propagation Delay @ 15V, 50pF	Operating Temp Range	Packaging
CD4049UBDR	Texas Instruments	Active	3V–18V	4 µA	4.3mA / 24mA	50ns	-55°C to 125°C	Cut Tape (CT) & Digi-Reel®
CD4049UBDRE4	Texas Instruments	Discontinued at DiGi Electronics	3V–18V	4 µA	4.3mA / 24mA	50ns	-55°C to 125°C	Cut Tape (CT) & Digi-Reel®
CD4049UBDRG4	Texas Instruments	Discontinued at DiGi Electronics	3V–18V	4 µA	4.3mA / 24mA	50ns	-55°C to 125°C	Cut Tape (CT) & Digi-Reel®
CD4049UBDT	Texas Instruments	Discontinued at DiGi Electronics	3V–18V	4 µA	4.3mA / 24mA	50ns	-55°C to 125°C	Cut Tape (CT) & Digi-Reel®
MC14049UBDR2G	onsemi	Active	3V–18V	4 µA	10mA / 40mA	50ns	-55°C to 125°C	Cut Tape (CT) & Digi-Reel®
HEF4049BT,653	Nexperia USA Inc.	Active	3V–15V	16 µA	3mA / 20mA	40ns	-40°C to 85°C	Cut Tape (CT) & Digi-Reel®
MC14049BDG	onsemi	Active	3V–18V	4 µA	10mA / 40mA	60ns	-55°C to 125°C	Tube
MC14049BDR2G	onsemi	Active	3V–18V	4 µA	10mA / 40mA	60ns	-55°C to 125°C	Cut Tape (CT) & Digi-Reel®
MC14049UBDG	onsemi	Active	3V–18V	4 µA	10mA / 40mA	50ns	-55°C to 125°C	Tube
NLV14049BDR2G	onsemi	Active	3V–18V	4 µA	10mA / 40mA	60ns	-55°C to 125°C	Tape & Reel (TR)
NLV14049UBDR2G	onsemi	Active	3V–18V	4 µA	10mA / 40mA	50ns	-55°C to 125°C	Tape & Reel (TR)

Engineering Selection Recommendations

Primary Selection (Highest Compatibility): MC14049UBDR2G (onsemi) is the recommended active substitute. It maintains identical electrical specifications to the CD4049UBDR, operates across the full -55°C to 125°C temperature range, and is currently in active production with 20,400 units in stock. This part is suitable for applications requiring direct functional replacement.

Alternative Active Substitutes: MC14049UBDG and NLV14049UBDR2G are active alternatives from onsemi with identical core specifications. Selection between these depends on packaging requirements: MC14049UBDG uses tube packaging, while NLV14049UBDR2G uses tape & reel format.

Nexperia Alternative: HEF4049BT,653 is an active substitute from Nexperia with the following considerations: maximum supply voltage is limited to 15V (versus 18V for CD4049UBDR), operating temperature range is narrower (-40°C to 85°C), and propagation delay is faster (40ns). This part is suitable only for applications within these parameter constraints.

Discontinued Variants: CD4049UBDRE4, CD4049UBDRG4, and CD4049UBDT are Texas Instruments variants marked as discontinued at DiGi Electronics. These maintain identical specifications to the primary part but have limited availability.

Compliance & Certifications: All listed substitutes are ROHS3 compliant, REACH unaffected, and carry MSL rating 1 (unlimited). All parts are suitable for industrial and commercial applications requiring these certifications.

Frequently Asked Questions (FAQ)

Q: Can MC14049UBDR2G be used as a direct replacement for CD4049UBDR? A: Yes. MC14049UBDR2G is a direct functional equivalent. Both parts share identical logic type, circuit count, input configuration, voltage supply range (3V–18V), quiescent current (4 µA), propagation delay (50ns @ 15V, 50pF), and operating temperature range (-55°C to 125°C). The 16-SOIC package footprint is identical, enabling direct PCB substitution.

Q: What is the difference between MC14049UBDR2G and MC14049BDR2G? A: Both are onsemi products with identical electrical specifications. The difference is in packaging format: MC14049UBDR2G uses cut tape & Digi-Reel format, while MC14049BDR2G uses cut tape & Digi-Reel format with a different date code variant. Both are suitable for surface mount assembly.

Q: Can HEF4049BT,653 replace CD4049UBDR in all applications? A: HEF4049BT,653 is suitable only for applications meeting these constraints: maximum supply voltage of 15V (not 18V), operating temperature range of -40°C to 85°C (not -55°C to 125°C). Applications requiring the full 18V supply or extended temperature range must use alternative substitutes.

Q: What packaging options are available for substitutes? A: Substitutes are available in three packaging formats: Cut Tape (CT) & Digi-Reel (CD4049UBDR, MC14049UBDR2G, MC14049BDR2G, NLV14049BDR2G, NLV14049UBDR2G, HEF4049BT,653), Tube (MC14049BDG, MC14049UBDG), and Tape & Reel (NLV14049BDR2G, NLV14049UBDR2G). All maintain the same 16-SOIC footprint.

Q: Are all substitutes ROHS3 compliant? A: Yes. All listed substitutes are ROHS3 compliant with MSL rating 1 (unlimited moisture sensitivity level), matching the compliance profile of the CD4049UBDR.

Q: What is the inventory status of active substitutes? A: MC14049UBDR2G has 20,400 units in stock. MC14049BDR2G has 5,619 units. MC14049UBDG has 4,670 units. NLV14049UBDR2G has 2,100 units. HEF4049BT,653 has 12,787 units. All are currently in active production.

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