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CD4050BCM Equivalent & Substitute Parts
Part Overview
The CD4050BCM is a non-inverting buffer IC from onsemi's 4000B logic series, featuring 6 elements with 1 bit per element and push-pull output configuration. This component operates across a 3V to 15V supply range and is rated for -55°C to 125°C operating temperature. The CD4050BCM is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity.
Substiute Parts
Key Parameters
| Parameter | CD4050BCM |
|---|---|
| Logic Type | Buffer, Non-Inverting |
| Number of Elements | 6 |
| Number of Bits per Element | 1 |
| Output Type | Push-Pull |
| Current - Output High, Low | 12mA, 40mA |
| Voltage - Supply | 3V ~ 15V |
| Operating Temperature | -55°C ~ 125°C (TA) |
| Package / Case | 16-SOIC (0.154", 3.90mm Width) |
| Mounting Type | Surface Mount |
| Product Status | Obsolete |
Substitute Part Grouping Explanation
Substitution for the CD4050BCM is determined by the following critical parameters:
- Logic Function: Buffer, Non-Inverting with 6 elements, 1 bit per element
- Output Configuration: Push-Pull output type
- Package Compatibility: 16-SOIC form factor (physical dimensions and pin count)
- Supply Voltage Range: Minimum 3V to 15V or higher
- Operating Temperature Range: Support for -55°C to 125°C or compatible subset
- Output Current Capability: High and low output current ratings
Substitute parts are grouped into two categories based on voltage rating and thermal specifications:
Category A - Extended Voltage Range (3V ~ 18V): Parts with higher maximum supply voltage than the original, offering broader application flexibility while maintaining backward compatibility.
Category B - Standard Voltage Range (3V ~ 15V): Parts matching the original voltage specification, with potential differences in output current or thermal operating range.
Parameter Comparison
| Part Number | Manufacturer | Logic Type | Elements | Output Type | Current High/Low (mA) | Voltage Supply | Temp Range (°C) | Package | Product Status |
|---|---|---|---|---|---|---|---|---|---|
| CD4050BCM | onsemi | Buffer, Non-Inverting | 6 x 1-bit | Push-Pull | 12, 40 | 3V ~ 15V | -55 ~ 125 | 16-SOIC (0.154") | Obsolete |
| MC14050BDG | Fairchild Semiconductor | Buffer, Non-Inverting | 6 x 1-bit | Push-Pull | — | — | — | 16-SOIC | Active |
| MC14050BDR2G | onsemi | Buffer, Non-Inverting | 6 x 1-bit | Push-Pull | 10, 40 | 3V ~ 18V | -55 ~ 125 | 16-SOIC (0.154") | Active |
| CD4050BDR | Texas Instruments | Buffer, Non-Inverting | 6 x 1-bit | Push-Pull | 8, 48 | 3V ~ 18V | -55 ~ 125 | 16-SOIC (0.154") | Active |
| CD4050BDT | Texas Instruments | Buffer, Non-Inverting | 6 x 1-bit | Push-Pull | 8, 48 | 3V ~ 18V | -55 ~ 125 | 16-SOIC (0.154") | Discontinued at DiGi Electronics |
| CD4050BDW | Texas Instruments | Buffer, Non-Inverting | 6 x 1-bit | Push-Pull | 8, 48 | 3V ~ 18V | -55 ~ 125 | 16-SOIC (0.295") | Last Time Buy |
| CD4050BDWR | Texas Instruments | Buffer, Non-Inverting | 6 x 1-bit | Push-Pull | 8, 48 | 3V ~ 18V | -55 ~ 125 | 16-SOIC (0.295") | Active |
| CD4050BNSR | Texas Instruments | Buffer, Non-Inverting | 6 x 1-bit | Push-Pull | 8, 48 | 3V ~ 18V | -55 ~ 125 | 16-SO (0.209") | Active |
| HEF4050BT,653 | Nexperia USA Inc. | Buffer, Non-Inverting | 6 x 1-bit | Push-Pull | 3, 20 | 3V ~ 15V | -40 ~ 85 | 16-SO (0.154") | Active |
| TC4050BF(EL,N,F) | Toshiba Semiconductor and Storage | Buffer, Non-Inverting | 6 x 1-bit | Push-Pull | 8, 48 | 3V ~ 18V | -40 ~ 85 | 16-SOP (0.209") | Active |
Engineering Selection Recommendations
Primary Recommendation - MC14050BDR2G (onsemi)
MC14050BDR2G is the preferred substitute, maintaining onsemi manufacturer continuity while offering extended voltage range (3V ~ 18V) and full temperature specification (-55°C ~ 125°C) matching the original. Product status is Active with RoHS3 compliance.
Secondary Recommendation - CD4050BDR (Texas Instruments)
CD4050BDR provides Active product status with identical thermal range (-55°C ~ 125°C) and extended voltage support (3V ~ 18V). Texas Instruments maintains robust supply availability. RoHS3 compliant.
Alternative for Extended Voltage Applications - CD4050BDWR (Texas Instruments)
CD4050BDWR offers Active status with 3V ~ 18V supply range and -55°C ~ 125°C operating temperature. Tape & Reel packaging supports high-volume production. RoHS3 compliant.
Voltage-Matched Alternative - HEF4050BT,653 (Nexperia USA Inc.)
HEF4050BT,653 matches the original 3V ~ 15V voltage specification with Active product status and RoHS3 compliance. Operating temperature range is -40°C ~ 85°C, suitable for applications not requiring full -55°C lower limit. Output current is reduced (3mA/20mA vs. 12mA/40mA).
Avoid - CD4050BDT and CD4050BDW
CD4050BDT is discontinued at DiGi Electronics. CD4050BDW carries Last Time Buy status, indicating end-of-life phase-out. Both should be avoided for new designs.
Frequently Asked Questions (FAQ)
Q: Can I directly replace CD4050BCM with MC14050BDR2G?
A: Yes. Both are 6-element, non-inverting buffers with push-pull output in 16-SOIC packaging. MC14050BDR2G extends voltage range to 18V and maintains -55°C ~ 125°C thermal specification. Pin configuration and functional behavior are compatible.
Q: What is the difference between CD4050BDR and CD4050BDWR?
A: Both are Texas Instruments CD4050 variants with identical electrical specifications (3V ~ 18V, -55°C ~ 125°C, 8mA/48mA output). The primary difference is package width: CD4050BDR uses 0.154" width (standard 16-SOIC), while CD4050BDWR uses 0.295" width (wider 16-SOIC). Select based on PCB layout requirements.
Q: Why does HEF4050BT,653 have lower output current ratings?
A: HEF4050BT,653 from Nexperia is designed for lower-power applications with 3mA/20mA output capability versus 12mA/40mA on the original. Verify your circuit's current requirements before substitution. Operating temperature range is also narrower (-40°C ~ 85°C).
Q: Are all substitutes RoHS compliant?
A: All listed substitutes carry RoHS3 compliance or RoHS Compliant status, meeting environmental regulations. TC4050BF(EL,N,F) shows Vendor Undefined REACH status; verify with supplier if REACH compliance is required.
Q: Can I use CD4050BNSR as a direct replacement?
A: CD4050BNSR is functionally equivalent with identical electrical specifications (3V ~ 18V, -55°C ~ 125°C, 8mA/48mA). However, package width differs: 0.209" versus 0.154" on the original. Confirm PCB footprint compatibility before selection.
Q: What is the difference between 16-SOIC, 16-SO, and 16-SOP packages?
A: These are variations of 16-pin surface-mount packages with different body widths and lead configurations. 16-SOIC (0.154") is the original specification. 16-SO and 16-SOP variants may have different pitch or width. Verify PCB footprint compatibility with your design before substitution.
Q: Which substitute offers the best long-term availability?
A: MC14050BDR2G (onsemi) and CD4050BDR (Texas Instruments) both carry Active product status with established supply chains. Both are recommended for new designs requiring long-term component availability.
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