CD4049UBDWR Equivalent & Substitute Parts

Part Overview

The CD4049UBDWR is a 6-channel inverter logic IC manufactured by Texas Instruments in a 16-SOIC surface mount package. This device is classified as obsolete, making equivalent substitute parts necessary for ongoing production and maintenance applications. The CD4049UBDWR belongs to the 4000B logic series and operates across a wide supply voltage range of 3V to 18V, making it suitable for both low-power and standard logic applications.

Substiute Parts

CD4049UBDWR

Texas InstrumentsIn Stock: 2151CD4049UBDWR Datasheet

Current PartRFQ

HEF4049BT,653

Nexperia USA Inc.In Stock: 12797HEF4049BT,653 Datasheet

MFR RecommendedRFQ

MC14049UBDR2G

onsemiIn Stock: 20461MC14049UBDR2G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the CD4049UBDWR is determined by the following critical parameters:

• Logic function: 6-channel inverter with single input per channel
• Supply voltage range: Minimum 3V, maximum 18V
• Package type: 16-SOIC surface mount
• Series classification: 4000B logic family
• Operating temperature range: -55°C to 125°C
• RoHS3 compliance and REACH unaffected status

The identified substitute parts maintain these core functional and environmental specifications, ensuring direct replacement capability in existing designs.

Parameter Comparison

Engineering Selection Recommendations

Both HEF4049BT,653 and MC14049UBDR2G are active production alternatives to the obsolete CD4049UBDWR.

The MC14049UBDR2G by onsemi provides the closest electrical and thermal specification match, maintaining identical supply voltage range (3V ~ 18V) and operating temperature range (-55°C ~ 125°C) as the original part. This part is recommended for applications requiring the full temperature and voltage specifications of the CD4049UBDWR.

The HEF4049BT,653 by Nexperia USA Inc. operates within a reduced supply voltage range (3V ~ 15V) and narrower operating temperature range (-40°C ~ 85°C). This part is suitable for applications operating within these constraints and offers faster propagation delay (40ns versus 50ns). Both substitute parts maintain ROHS3 compliance, REACH unaffected status, and MSL 1 rating.

Frequently Asked Questions (FAQ)

Q: Can HEF4049BT,653 be used in applications requiring operation above 15V supply voltage?

A: No. The HEF4049BT,653 is specified for maximum 15V supply voltage, while the CD4049UBDWR and MC14049UBDR2G support up to 18V. Applications requiring supply voltages between 15V and 18V must use MC14049UBDR2G.

Q: Are there package compatibility considerations between the substitute parts?

A: Yes. The CD4049UBDWR uses a 16-SOIC package with 0.295" (7.50mm) width, while both HEF4049BT,653 and MC14049UBDR2G use 16-SOIC packages with 0.154" (3.90mm) width. PCB layout and footprint verification is required before substitution.

Q: What is the difference in quiescent current between the substitute parts?

A: The HEF4049BT,653 draws 16 µA maximum quiescent current, while both the CD4049UBDWR and MC14049UBDR2G draw 4 µA maximum. For low-power applications, MC14049UBDR2G is preferred.

Q: Can HEF4049BT,653 be used in applications operating below -40°C?

A: No. The HEF4049BT,653 is specified for minimum -40°C operating temperature. Applications requiring operation below -40°C must use MC14049UBDR2G, which is specified to -55°C.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. Both HEF4049BT,653 and MC14049UBDR2G are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, matching the compliance profile of the CD4049UBDWR.