CD4049UBCN Equivalent & Substitute Parts

Part Overview

The CD4049UBCN is a 6-channel inverter logic IC manufactured by onsemi in the 4000B series, housed in a 16-PDIP package. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement. The CD4049UBCN operates across a wide supply voltage range of 3V to 15V and is suitable for applications requiring single-input inverter logic functions in through-hole mounting configurations.

Substiute Parts

CD4049UBCN

onsemiIn Stock: 2102CD4049UBCN Datasheet

Current PartRFQ

CD4049UBE

Texas InstrumentsIn Stock: 5389CD4049UBE Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the CD4049UBCN is determined by the following critical parameters:

• Logic Function: Both parts must be 6-channel inverters with single-input configuration
• Package Type: 16-PDIP through-hole mounting with identical physical dimensions (0.300", 7.62mm)
• Series Compatibility: Both parts belong to the 4000B logic series
• Supply Voltage Range: The substitute must support the operating voltage window of the original part
• Quiescent Current: Maximum quiescent current specification must be met
• Operating Temperature Range: Must cover the full -55°C to 125°C range
• Output Characteristics: Current output specifications must be compatible with circuit requirements

The CD4049UBE from Texas Instruments meets all substitution criteria as an active-status alternative to the obsolete CD4049UBCN.

Parameter Comparison

Engineering Selection Recommendations

The CD4049UBE from Texas Instruments is the recommended substitute for the obsolete CD4049UBCN. The Texas Instruments part maintains full functional and mechanical compatibility while offering the advantage of active product status, ensuring long-term availability and supply chain continuity.

The CD4049UBE provides a wider supply voltage range (3V to 18V versus 3V to 15V), which offers greater design flexibility. Output current specifications are lower on the Texas Instruments variant, which is acceptable for most applications as it represents conservative performance. The propagation delay is slightly higher (50 ns versus 35 ns at 15V, 50pF), which must be evaluated against specific timing requirements in the target application.

Both parts are REACH Unaffected and classified under ECCN EAR99, maintaining equivalent regulatory compliance. The Texas Instruments CD4049UBE is RoHS3 Compliant, providing additional environmental compliance assurance for modern manufacturing standards.

Frequently Asked Questions (FAQ)

Q: Can the CD4049UBE directly replace the CD4049UBCN without circuit modifications?

A: Yes. Both parts are pin-compatible 16-PDIP packages with identical pinout, logic function, and operating temperature range. No circuit modifications are required for direct substitution.

Q: What is the significance of the different supply voltage ranges?

A: The CD4049UBE supports 3V to 18V, while the CD4049UBCN supports 3V to 15V. The wider range of the substitute part provides greater design margin and flexibility. Circuits designed for the original 3V to 15V window will operate within the substitute's specifications.

Q: How do the output current differences affect circuit design?

A: The CD4049UBE has lower output current specifications (4.3 mA high, 24 mA low) compared to the CD4049UBCN (7.2 mA high, 29 mA low). This represents more conservative performance. Verify that your load impedance is compatible with the lower output current capability of the substitute.

Q: Is the propagation delay difference significant?

A: The CD4049UBE has a maximum propagation delay of 50 ns at 15V with 50pF load, compared to 35 ns for the CD4049UBCN. For timing-critical applications, confirm that the additional 15 ns delay does not violate system timing requirements.

Q: What packaging options are available for the CD4049UBE?

A: The CD4049UBE is supplied in Tube packaging. Verify that your procurement and assembly processes are compatible with tube packaging format.

Q: Are there any compliance or regulatory differences?

A: The CD4049UBE is RoHS3 Compliant, while the CD4049UBCN does not specify RoHS status. Both parts are REACH Unaffected and classified as EAR99. The Texas Instruments part offers enhanced environmental compliance documentation suitable for modern manufacturing standards.

Q: Why is the CD4049UBCN classified as obsolete?

A: Obsolete status indicates that onsemi has discontinued production and support for this part. The CD4049UBE from Texas Instruments provides an active, supported alternative within the same 4000B logic series.