CD4049UBCMX Equivalent & Substitute Parts

Part Overview

The CD4049UBCMX is a 6-channel inverter logic IC manufactured by onsemi in 16-SOIC surface mount packaging. This part is classified as obsolete, which necessitates identification of active equivalent and substitute components for ongoing design requirements. The CD4049UBCMX belongs to the 4000B logic series and operates across a supply voltage range of 3V to 15V with a maximum quiescent current of 4 µA.

Key Parameters

Parameter	CD4049UBCMX
Manufacturer	onsemi
Logic Type	Inverter
Number of Circuits	6
Number of Inputs	1
Voltage - Supply	3V ~ 15V
Current - Quiescent (Max)	4 µA
Current - Output High, Low	7.2mA, 29mA
Input Logic Level - Low	1V ~ 3V
Input Logic Level - High	4V ~ 12V
Max Propagation Delay @ 15V, 50pF	35ns
Operating Temperature	-55°C ~ 125°C
Package / Case	16-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the CD4049UBCMX is determined by the following critical parameters:

Logic function: 6-channel inverter with single input per channel
Package compatibility: 16-SOIC surface mount form factor
Supply voltage range: Minimum 3V operation required
Operating temperature range: -55°C to 125°C
Quiescent current specification: 4 µA maximum
Propagation delay performance at 15V, 50pF load

Substitute parts are grouped into two categories based on electrical performance characteristics:

Category A (onsemi MC14049 series): MC14049BDG, MC14049BDR2G, MC14049UBDG, MC14049UBDR2G. These parts feature extended supply voltage range (3V ~ 18V), higher output current capability (10mA, 40mA), and are all active products with RoHS3 compliance.

Category B (Texas Instruments CD4049 series): CD4049UBD, CD4049UBDR, CD4049UBDRE4, CD4049UBDRG4, CD4049UBDT, CD4049UBDW. These parts maintain the CD4049 base product number with supply voltage range of 3V ~ 18V, lower output current capability (4.3mA, 24mA), and mixed product status (active and discontinued at DiGi Electronics).

Parameter Comparison

Part Number	Manufacturer	Voltage - Supply	Current - Output High, Low	Input Logic Level - Low	Input Logic Level - High	Max Propagation Delay @ 15V, 50pF	Product Status	Packaging	RoHS Status
CD4049UBCMX	onsemi	3V ~ 15V	7.2mA, 29mA	1V ~ 3V	4V ~ 12V	35ns	Obsolete	Cut Tape (CT) & Digi-Reel®	REACH Unaffected
MC14049BDG	onsemi	3V ~ 18V	10mA, 40mA	1.5V ~ 4V	4.6V ~ 11V	60ns	Active	Tube	ROHS3 Compliant
MC14049BDR2G	onsemi	3V ~ 18V	10mA, 40mA	1.5V ~ 4V	4.6V ~ 11V	60ns	Active	Cut Tape (CT) & Digi-Reel®	ROHS3 Compliant
MC14049UBDG	onsemi	3V ~ 18V	10mA, 40mA	1V ~ 2.5V	4V ~ 12.5V	50ns	Active	Tube	ROHS3 Compliant
MC14049UBDR2G	onsemi	3V ~ 18V	10mA, 40mA	1V ~ 2.5V	4V ~ 12.5V	50ns	Active	Cut Tape (CT) & Digi-Reel®	ROHS3 Compliant
CD4049UBD	Texas Instruments	3V ~ 18V	4.3mA, 24mA	1V ~ 2.5V	4V ~ 12.5V	50ns	Discontinued at DiGi Electronics	Tube	ROHS3 Compliant
CD4049UBDR	Texas Instruments	3V ~ 18V	4.3mA, 24mA	1V ~ 2.5V	4V ~ 12.5V	50ns	Active	Cut Tape (CT) & Digi-Reel®	ROHS3 Compliant
CD4049UBDRE4	Texas Instruments	3V ~ 18V	4.3mA, 24mA	1V ~ 2.5V	4V ~ 12.5V	50ns	Discontinued at DiGi Electronics	Cut Tape (CT) & Digi-Reel®	ROHS3 Compliant
CD4049UBDRG4	Texas Instruments	3V ~ 18V	4.3mA, 24mA	1V ~ 2.5V	4V ~ 12.5V	50ns	Discontinued at DiGi Electronics	Cut Tape (CT) & Digi-Reel®	ROHS3 Compliant
CD4049UBDT	Texas Instruments	3V ~ 18V	4.3mA, 24mA	1V ~ 2.5V	4V ~ 12.5V	50ns	Discontinued at DiGi Electronics	Cut Tape (CT) & Digi-Reel®	ROHS3 Compliant
CD4049UBDW	Texas Instruments	3V ~ 18V	4.3mA, 24mA	1V ~ 2.5V	4V ~ 12.5V	50ns	Active	Tube	ROHS3 Compliant

Engineering Selection Recommendations

For applications requiring the CD4049UBCMX in Cut Tape (CT) & Digi-Reel® packaging with active product status, MC14049UBDR2G is the primary selection. This part maintains onsemi manufacturing, active product status, RoHS3 compliance, and identical 16-SOIC package dimensions. The extended supply voltage range (3V ~ 18V) provides additional operational margin beyond the original 3V ~ 15V specification.

For applications where Texas Instruments sourcing is required, CD4049UBDR offers active product status with Cut Tape packaging. This part maintains electrical compatibility within the 16-SOIC package and provides RoHS3 compliance.

For tube packaging applications, MC14049UBDG (onsemi, active) or CD4049UBDW (Texas Instruments, active) are available with equivalent functional performance.

Parts with discontinued status at DiGi Electronics (CD4049UBD, CD4049UBDRE4, CD4049UBDRG4, CD4049UBDT) remain available through alternative distribution channels but should be evaluated for long-term supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can MC14049UBDR2G directly replace CD4049UBCMX in existing designs?

A: Yes. Both parts are 6-channel inverters in 16-SOIC surface mount packaging with identical logic function, operating temperature range (-55°C to 125°C), and quiescent current specification (4 µA maximum). The extended supply voltage range of MC14049UBDR2G (3V ~ 18V) is backward compatible with the original 3V ~ 15V requirement.

Q: What is the difference between MC14049BDR2G and MC14049UBDR2G?

A: Both parts are manufactured by onsemi in Cut Tape packaging with identical electrical specifications. The primary difference is input logic level thresholds: MC14049BDR2G specifies 1.5V ~ 4V (low) and 4.6V ~ 11V (high), while MC14049UBDR2G specifies 1V ~ 2.5V (low) and 4V ~ 12.5V (high). MC14049UBDR2G provides tighter input threshold specifications matching the original CD4049UBCMX more closely.

Q: Why do Texas Instruments CD4049 variants show lower output current than onsemi MC14049 variants?

A: Output current specifications reflect the electrical characteristics of each manufacturer's implementation. CD4049UBDR specifies 4.3mA (high) and 24mA (low) output current, while MC14049UBDR2G specifies 10mA (high) and 40mA (low). Both meet the functional requirement of 6-channel inversion. Application output current requirements determine which specification is appropriate.

Q: Is packaging format (Cut Tape vs. Tube) functionally significant?

A: Packaging format affects supply chain logistics and handling but does not alter electrical function or performance. Cut Tape (CT) & Digi-Reel® packaging is suitable for automated assembly processes, while Tube packaging is used for manual assembly or lower-volume applications. Functional equivalence is maintained across both packaging formats.

Q: What is the significance of RoHS3 compliance on substitute parts?

A: All active substitute parts carry RoHS3 compliance certification, indicating conformance to Restriction of Hazardous Substances regulations. The original CD4049UBCMX carries REACH Unaffected status. RoHS3 compliance on substitute parts ensures regulatory alignment for new designs and manufacturing processes.

Q: Can discontinued parts (CD4049UBDT, CD4049UBDRG4, CD4049UBDRE4) be used as substitutes?

A: These parts remain functionally equivalent and are available through alternative distribution channels. However, discontinued status at DiGi Electronics indicates reduced availability and potential supply chain constraints. For new designs, active products (MC14049UBDR2G, CD4049UBDR, CD4049UBDW) are recommended to ensure long-term supply continuity.

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