CD40106BCMX Equivalent & Substitute Parts

Part Overview

The CD40106BCMX is a 6-channel inverter IC with Schmitt trigger inputs manufactured by onsemi in the 4000B logic series. This device features a 14-SOIC package and operates across a supply voltage range of 3V to 15V. The part is currently listed as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

The CD40106BCMX is functionally a CMOS inverter logic gate with hysteresis characteristics provided by Schmitt trigger inputs. Its obsolete status requires designers to identify active alternative parts that maintain electrical and mechanical compatibility.

Key Parameters

Parameter	Value
Logic Type	Inverter
Number of Circuits	6
Number of Inputs	1
Features	Schmitt Trigger
Voltage - Supply	3V ~ 15V
Current - Quiescent (Max)	4 µA
Current - Output High, Low	3.4mA, 3.4mA
Input Logic Level - Low	0.7V ~ 2.1V
Input Logic Level - High	4.3V ~ 12.9V
Max Propagation Delay @ 15V, 50pF	160ns
Operating Temperature	-55°C ~ 125°C
Package / Case	14-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the CD40106BCMX is determined by the following critical parameters:

Logic Function: All substitutes must be 6-channel inverter ICs with Schmitt trigger inputs
Package Compatibility: Primary substitutes maintain the 14-SOIC (0.154", 3.90mm) package; alternative packages (14-SO with 0.209", 5.30mm width) are noted separately
Supply Voltage Range: The original part operates at 3V ~ 15V; substitutes with extended ranges (3V ~ 18V or 3V ~ 20V) are compatible
Input/Output Logic Levels: Substitutes must accommodate the input and output voltage thresholds of the original design
Propagation Delay: Maximum delay specification of 160ns at 15V, 50pF load determines timing compatibility
Operating Temperature: All substitutes maintain the -55°C ~ 125°C range
Product Status: Active parts are preferred over discontinued alternatives for long-term availability

Substitutes are grouped into two categories: direct replacements from alternative manufacturers (MC14106, CD40106 variants from Texas Instruments) and enhanced alternatives with automotive qualification or extended specifications (HCF40106YM013TR, HEC40106BT variants).

Parameter Comparison

Part Number	Manufacturer	Product Status	Supply Voltage	Quiescent Current (Max)	Output Current (High/Low)	Propagation Delay @ 15V, 50pF	Package	RoHS Status
CD40106BCMX	onsemi	Obsolete	3V ~ 15V	4 µA	3.4mA / 3.4mA	160ns	14-SOIC (0.154")	Not specified
MC14106BDG	onsemi	Active	3V ~ 18V	1 µA	8.8mA / 8.8mA	80ns	14-SOIC (0.154")	ROHS3 Compliant
MC14106BDR2G	onsemi	Active	3V ~ 18V	1 µA	8.8mA / 8.8mA	80ns	14-SOIC (0.154")	ROHS3 Compliant
CD40106BM	Texas Instruments	Active	3V ~ 18V	4 µA	3.4mA / 3.4mA	120ns	14-SOIC (0.154")	ROHS3 Compliant
CD40106BM96	Texas Instruments	Active	3V ~ 18V	4 µA	3.4mA / 3.4mA	120ns	14-SOIC (0.154")	ROHS3 Compliant
CD40106BM96G4	Texas Instruments	Discontinued at DiGi Electronics	3V ~ 18V	4 µA	3.4mA / 3.4mA	120ns	14-SOIC (0.154")	ROHS3 Compliant
CD40106BMT	Texas Instruments	Discontinued at DiGi Electronics	3V ~ 18V	4 µA	3.4mA / 3.4mA	120ns	14-SOIC (0.154")	ROHS3 Compliant
CD40106BNSR	Texas Instruments	Active	3V ~ 18V	4 µA	3.4mA / 3.4mA	120ns	14-SO (0.209")	ROHS3 Compliant
HCF40106YM013TR	STMicroelectronics	Active	3V ~ 20V	20 µA	6.8mA / 6.8mA	120ns	14-SO (0.154")	ROHS3 Compliant
HEC40106BT,112	NXP USA Inc.	Active	3V ~ 15V	1 µA	3.4mA / 3.4mA	60ns	14-SO (0.154")	ROHS3 Compliant
HEC40106BT,118	NXP USA Inc.	Active	3V ~ 15V	1 µA	3.4mA / 3.4mA	60ns	14-SO (0.154")	ROHS3 Compliant

Engineering Selection Recommendations

Primary Substitutes (Recommended for Direct Replacement)

CD40106BM and CD40106BM96 from Texas Instruments are the preferred substitutes. Both maintain the same quiescent current specification (4 µA) as the original CD40106BCMX, identical output current ratings (3.4mA), and the same 14-SOIC (0.154") package footprint. These parts are active and ROHS3 compliant. The propagation delay improves to 120ns compared to the original 160ns, providing better timing performance. Supply voltage extends to 3V ~ 18V, maintaining backward compatibility with the original 3V ~ 15V range.

Alternative Substitutes (Extended Specifications)

MC14106BDG and MC14106BDR2G from onsemi offer superior performance characteristics with reduced quiescent current (1 µA) and faster propagation delay (80ns). These parts maintain the same package and are ROHS3 compliant. The extended supply voltage range (3V ~ 18V) and higher output current capability (8.8mA) make these suitable for applications requiring lower power consumption or faster switching.

Package Variant Consideration

CD40106BNSR from Texas Instruments uses a 14-SO package with 0.209" width instead of the standard 0.154" width. This part is active and ROHS3 compliant but requires PCB layout verification due to the wider package footprint.

Automotive-Grade Alternative

HCF40106YM013TR from STMicroelectronics is AEC-Q100 qualified for automotive applications. It offers the fastest propagation delay (120ns) and extended supply voltage (3V ~ 20V), though quiescent current is higher at 20 µA. This part is suitable for designs requiring automotive-grade components.

NXP Alternatives

HEC40106BT,112 and HEC40106BT,118 from NXP USA Inc. provide the fastest propagation delay (60ns) and lowest quiescent current (1 µA) among all substitutes. These parts maintain the original supply voltage range (3V ~ 15V) and are ROHS3 compliant. The 14-SO package with 0.154" width is compatible with standard SOIC footprints.

Frequently Asked Questions (FAQ)

Q: Can I directly replace CD40106BCMX with CD40106BM96?

A: Yes. Both parts are 6-channel Schmitt trigger inverters in the 14-SOIC (0.154") package. CD40106BM96 is active, ROHS3 compliant, and offers improved propagation delay (120ns vs. 160ns). The extended supply voltage range (3V ~ 18V) is backward compatible with designs using 3V ~ 15V.

Q: What is the difference between MC14106BDG and MC14106BDR2G?

A: Both parts are electrically identical 6-channel Schmitt trigger inverters from onsemi with the same specifications. The difference is packaging: MC14106BDG is supplied in Tube packaging, while MC14106BDR2G is supplied in Cut Tape (CT) & Digi-Reel format. Select based on procurement and assembly requirements.

Q: Why does HCF40106YM013TR have higher quiescent current?

A: HCF40106YM013TR is an automotive-grade part (AEC-Q100 qualified) from STMicroelectronics with extended supply voltage range (3V ~ 20V). The higher quiescent current (20 µA) is a characteristic of this specific device variant. It is suitable for automotive applications where qualification is required.

Q: Is CD40106BNSR compatible with my existing PCB layout?

A: CD40106BNSR uses a 14-SO package with 0.209" width, compared to the standard 14-SOIC (0.154") width of the original part. PCB footprint verification is required before substitution. If your design uses standard SOIC footprints, use CD40106BM, CD40106BM96, or MC14106 variants instead.

Q: Which substitute offers the best timing performance?

A: HEC40106BT,112 and HEC40106BT,118 from NXP USA Inc. provide the fastest propagation delay at 60ns @ 15V, 50pF load. These parts are active, ROHS3 compliant, and maintain the original supply voltage range (3V ~ 15V).

Q: Are all substitutes ROHS3 compliant?

A: All listed substitute parts are ROHS3 compliant. The original CD40106BCMX does not specify RoHS status due to its obsolete classification.

Q: Can I use HEC40106BT variants if my design requires 18V supply?

A: No. HEC40106BT,112 and HEC40106BT,118 are rated for 3V ~ 15V supply voltage. For designs requiring 18V operation, use CD40106BM, CD40106BM96, MC14106BDG, MC14106BDR2G, or HCF40106YM013TR instead.

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