CD4050BCMX Equivalent & Substitute Parts

Part Overview

The CD4050BCMX is a non-inverting buffer logic IC manufactured by onsemi, part of the 4000B series. This device provides 6 independent buffer elements with push-pull outputs, designed for signal conditioning and level shifting applications across a 3V to 15V supply range. The CD4050BCMX is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. Substitute parts maintain functional equivalence through matching logic type, element count, output configuration, and compatible electrical parameters.

Key Parameters

Parameter	CD4050BCMX
Logic Type	Buffer, Non-Inverting
Number of Elements	6
Bits per Element	1
Output Type	Push-Pull
Current - Output High / Low	12mA / 40mA
Voltage - Supply	3V ~ 15V
Operating Temperature	-55°C ~ 125°C
Package / Case	16-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitute parts for the CD4050BCMX are selected based on the following critical parameters:

Logic Function: All substitutes must be non-inverting buffers with 6 elements, 1 bit per element
Output Configuration: Push-pull output type required
Supply Voltage Compatibility: Minimum 3V to 15V overlap with the original part
Package Compatibility: 16-SOIC package family (variations in width permitted for PCB redesign scenarios)
Operating Temperature Range: Overlap with -55°C to 125°C specification
Mounting Type: Surface mount only

Substitutes are grouped into two categories:

Category A - Direct Functional Equivalents (16-SOIC, 0.154" width): MC14050BDG and HEF4050BT,653 maintain identical package dimensions and pinout compatibility.

Category B - Extended Voltage Range Equivalents (16-SOIC variants): MC14050BDR2G, CD4050BDR, CD4050BDT, CD4050BDW, CD4050BDWR, CD4050BNSR, and TC4050BF(EL,N,F) provide 3V to 18V supply range with compatible 16-SOIC packaging (width variations noted).

Parameter Comparison

Part Number	Manufacturer	Logic Type	Elements	Output Type	Current High/Low (mA)	Supply Voltage	Temp Range (°C)	Package	Status
CD4050BCMX	onsemi	Buffer, Non-Inverting	6	Push-Pull	12 / 40	3V ~ 15V	-55 ~ 125	16-SOIC (0.154")	Obsolete
MC14050BDG	Fairchild Semiconductor	Buffer, Non-Inverting	6	Push-Pull	—	—	—	16-SOIC	Active
MC14050BDR2G	onsemi	Buffer, Non-Inverting	6	Push-Pull	10 / 40	3V ~ 18V	-55 ~ 125	16-SOIC (0.154")	Active
CD4050BDR	Texas Instruments	Buffer, Non-Inverting	6	Push-Pull	8 / 48	3V ~ 18V	-55 ~ 125	16-SOIC (0.154")	Active
CD4050BDT	Texas Instruments	Buffer, Non-Inverting	6	Push-Pull	8 / 48	3V ~ 18V	-55 ~ 125	16-SOIC (0.154")	Discontinued at DiGi Electronics
CD4050BDW	Texas Instruments	Buffer, Non-Inverting	6	Push-Pull	8 / 48	3V ~ 18V	-55 ~ 125	16-SOIC (0.295")	Last Time Buy
CD4050BDWR	Texas Instruments	Buffer, Non-Inverting	6	Push-Pull	8 / 48	3V ~ 18V	-55 ~ 125	16-SOIC (0.295")	Active
CD4050BNSR	Texas Instruments	Buffer, Non-Inverting	6	Push-Pull	8 / 48	3V ~ 18V	-55 ~ 125	16-SO (0.209")	Active
HEF4050BT,653	Nexperia USA Inc.	Buffer, Non-Inverting	6	Push-Pull	3 / 20	3V ~ 15V	-40 ~ 85	16-SOIC (0.154")	Active
TC4050BF(EL,N,F)	Toshiba Semiconductor and Storage	Buffer, Non-Inverting	6	Push-Pull	8 / 48	3V ~ 18V	-40 ~ 85	16-SOIC (0.209")	Active

Engineering Selection Recommendations

For Direct Replacement (Pinout and Package Compatible):

MC14050BDR2G (onsemi): Active status, extended voltage range to 18V, maintains -55°C to 125°C operating range, identical 16-SOIC (0.154") package. RoHS3 compliant.
CD4050BDR (Texas Instruments): Active status, extended voltage range to 18V, maintains -55°C to 125°C operating range, identical 16-SOIC (0.154") package. RoHS3 compliant.

For Designs Tolerating Temperature Range Reduction:

HEF4050BT,653 (Nexperia USA Inc.): Active status, matches original 3V to 15V supply range and 16-SOIC (0.154") package. Operating temperature limited to -40°C to 85°C. RoHS3 compliant.

For Designs Requiring Extended Voltage Range with Package Redesign Consideration:

CD4050BDWR (Texas Instruments): Active status, 3V to 18V supply, 16-SOIC (0.295" width) requires PCB layout adjustment. RoHS3 compliant.
TC4050BF(EL,N,F) (Toshiba): Active status, 3V to 18V supply, 16-SOIC (0.209" width) requires PCB layout adjustment. RoHS compliant.

Avoid:

CD4050BDT: Discontinued at DiGi Electronics
CD4050BDW: Last Time Buy status

Frequently Asked Questions (FAQ)

Q: Can MC14050BDR2G replace CD4050BCMX in existing designs without PCB modification?

A: Yes. MC14050BDR2G maintains identical pinout and 16-SOIC (0.154", 3.90mm width) package dimensions. The extended supply voltage range (3V to 18V) is backward compatible with the original 3V to 15V specification. Output current specifications (10mA high, 40mA low) are within acceptable tolerance for most applications designed for the original 12mA/40mA ratings.

Q: What is the difference between CD4050BDR and CD4050BDWR?

A: Both are Texas Instruments CD4050 variants with identical electrical specifications (3V to 18V supply, 8mA/48mA output current, -55°C to 125°C operating range). The difference is package width: CD4050BDR uses 16-SOIC (0.154", 3.90mm), while CD4050BDWR uses 16-SOIC (0.295", 7.50mm). PCB footprint redesign is required when switching between these variants.

Q: Is HEF4050BT,653 suitable for applications requiring -55°C operation?

A: No. HEF4050BT,653 operates from -40°C to 85°C, which does not meet the original CD4050BCMX specification of -55°C to 125°C. Use this substitute only for applications with operating temperature requirements within -40°C to 85°C.

Q: Do all substitute parts have RoHS compliance?

A: Most substitutes are RoHS3 compliant. TC4050BF(EL,N,F) is RoHS compliant (not RoHS3). Verify compliance requirements for your specific application and regulatory jurisdiction.

Q: What is the significance of the 16-SO package variant (CD4050BNSR)?

A: CD4050BNSR uses 16-SO (0.209", 5.30mm width) instead of the standard 16-SOIC (0.154", 3.90mm). This represents a wider package footprint requiring PCB redesign. Electrical specifications remain compatible with the original part.

Q: Can I use TC4050BF(EL,N,F) if my design operates at -55°C?

A: No. TC4050BF(EL,N,F) operates from -40°C to 85°C and does not support the -55°C lower temperature limit of the original CD4050BCMX. Select substitutes with -55°C minimum operating temperature for low-temperature applications.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message