CD4050BDT Equivalent & Substitute Parts

Part Overview

The CD4050BDT is a non-inverting buffer logic IC manufactured by Texas Instruments, designed for 6-element buffering with push-pull output capability. This device operates across a wide supply voltage range of 3V to 18V and supports operating temperatures from -55°C to 125°C. The part is discontinued at DiGi Electronics, making equivalent and substitute parts essential for ongoing design support and procurement.

Key Parameters

Parameter	CD4050BDT
Manufacturer	Texas Instruments
Logic Type	Buffer, Non-Inverting
Number of Elements	6
Number of Bits per Element	1
Output Type	Push-Pull
Current - Output High / Low	8mA / 48mA
Voltage - Supply	3V ~ 18V
Operating Temperature	-55°C ~ 125°C (TA)
Package / Case	16-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Series	4000B
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the CD4050BDT is determined by the following critical parameters: logic type (non-inverting buffer), element count (6), output configuration (push-pull), supply voltage range (3V to 18V minimum), operating temperature range (-55°C to 125°C minimum), and package type (16-SOIC surface mount). Parts meeting all these criteria are considered direct parametric equivalents. Parts with reduced voltage or temperature ranges, or different output current specifications, are classified as functional alternatives with application-specific limitations.

Parameter Comparison

Parameter	CD4050BDT	CD4050BDR	MC14050BDR2G	HEF4050BT,653	NLV14050BDR2G	TC4050BF(EL,N,F)
Manufacturer	Texas Instruments	Texas Instruments	onsemi	Nexperia USA Inc.	onsemi	Toshiba Semiconductor and Storage
Logic Type	Buffer, Non-Inverting	Buffer, Non-Inverting	Buffer, Non-Inverting	Buffer, Non-Inverting	Buffer, Non-Inverting	Buffer, Non-Inverting
Number of Elements	6	6	6	6	6	6
Output Type	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull
Current - Output High / Low	8mA / 48mA	8mA / 48mA	10mA / 40mA	3mA / 20mA	10mA / 40mA	8mA / 48mA
Voltage - Supply	3V ~ 18V	3V ~ 18V	3V ~ 18V	3V ~ 15V	3V ~ 18V	3V ~ 18V
Operating Temperature	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-40°C ~ 85°C	-55°C ~ 125°C	-40°C ~ 85°C
Package / Case	16-SOIC (0.154", 3.90mm)	16-SOIC (0.154", 3.90mm)	16-SOIC (0.154", 3.90mm)	16-SOIC (0.154", 3.90mm)	16-SOIC (0.154", 3.90mm)	16-SOIC (0.209", 5.30mm)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Series	4000B	4000B	4000B	4000B	4000B	TC
Product Status	Discontinued	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	RoHS Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

CD4050BDR is the primary parametric equivalent, manufactured by Texas Instruments with identical electrical specifications and packaging. This part maintains full compatibility with the CD4050BDT across all critical parameters and is currently in active production status.

MC14050BDR2G and NLV14050BDR2G, both from onsemi, provide functional equivalence with output current specifications of 10mA / 40mA versus the original 8mA / 48mA. These parts maintain the full 3V to 18V supply range and -55°C to 125°C operating temperature range. NLV14050BDR2G includes AEC-Q100 automotive qualification.

HEF4050BT,653 from Nexperia USA Inc. operates within a reduced supply voltage range of 3V to 15V and reduced operating temperature range of -40°C to 85°C. Output current is specified at 3mA / 20mA. This part is suitable only for applications not requiring the full 18V supply capability or extended temperature operation.

TC4050BF(EL,N,F) from Toshiba Semiconductor and Storage matches the original output current specifications of 8mA / 48mA and supply voltage range of 3V to 18V. Operating temperature range is limited to -40°C to 85°C. Package width differs at 5.30mm versus the standard 3.90mm, requiring PCB layout verification.

MC14050BDG from Fairchild Semiconductor is listed with limited parametric detail and bulk packaging, making it unsuitable for standard procurement workflows.

Frequently Asked Questions (FAQ)

Q: Can CD4050BDR be used as a direct replacement for CD4050BDT?

A: Yes. CD4050BDR is a parametric equivalent manufactured by Texas Instruments with identical electrical specifications, operating temperature range, supply voltage range, output current ratings, and 16-SOIC package dimensions. The only difference is packaging format (Cut Tape & Digi-Reel versus Tape & Reel).

Q: What are the limitations of HEF4050BT,653 as a substitute?

A: HEF4050BT,653 operates at a maximum supply voltage of 15V versus the original 18V, and has a reduced operating temperature range of -40°C to 85°C versus -55°C to 125°C. Output current is also reduced to 3mA / 20mA. Use this part only in applications that do not require 18V operation or extended temperature performance.

Q: Are onsemi parts MC14050BDR2G and NLV14050BDR2G interchangeable with the CD4050BDT?

A: Both onsemi parts maintain the full 3V to 18V supply range and -55°C to 125°C operating temperature range. Output current differs slightly at 10mA / 40mA versus 8mA / 48mA. NLV14050BDR2G includes AEC-Q100 automotive qualification. Both are functionally compatible for standard applications.

Q: Does TC4050BF(EL,N,F) require PCB layout changes?

A: TC4050BF(EL,N,F) uses a 16-SOP package with 5.30mm width versus the standard 16-SOIC at 3.90mm width. PCB footprint verification is required before substitution. Operating temperature is also limited to -40°C to 85°C.

Q: Which substitute part has the best availability?

A: CD4050BDR from Texas Instruments is the recommended choice, offering identical specifications with active production status and high inventory levels.

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