MM74HC151MTCX Equivalent & Substitute Parts

Part Overview

The MM74HC151MTCX is a 1 x 8:1 multiplexer logic IC manufactured by onsemi in 16-TSSOP surface mount packaging. This part is classified as obsolete, making equivalent substitutes necessary for new designs and production continuity. The 74HC151 series provides data selection and multiplexing functionality across the 2V to 6V supply voltage range with single supply operation.

Key Parameters

Parameter	Value
Manufacturer Part Number	MM74HC151MTCX
Manufacturer	onsemi
Category	Logic
Type	Multiplexer
Circuit Configuration	1 x 8:1
Package / Case	16-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
Voltage Supply	2V ~ 6V
Operating Temperature	-40°C ~ 85°C
Current - Output High, Low	5.2mA, 5.2mA
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility for the MM74HC151MTCX is determined by the following critical parameters:

Circuit configuration: 1 x 8:1 multiplexer function
Package type: 16-TSSOP surface mount
Voltage supply range: 2V ~ 6V single supply
Pin compatibility: Identical pinout within 74HC151 series
Output current capability: Minimum 5.2mA per output

Substitute parts are grouped into two categories:

Direct Substitutes maintain identical electrical specifications and pinout compatibility with the main part.

Similar Substitutes provide equivalent functionality with compatible parameters but may differ in output current ratings or temperature operating ranges.

Parameter Comparison

Part Number	Manufacturer	Circuit	Package	Voltage Supply	Operating Temp	Output Current (High/Low)	Product Status	Packaging Type
MM74HC151MTCX	onsemi	1 x 8:1	16-TSSOP	2V ~ 6V	-40°C ~ 85°C	5.2mA, 5.2mA	Obsolete	Surface Mount
MC74HC151ADTR2G	onsemi	1 x 8:1	16-TSSOP	2V ~ 6V	-55°C ~ 125°C	5.2mA, 5.2mA	Active	Tape & Reel
SN74HC151PW	Texas Instruments	1 x 8:1	16-TSSOP	2V ~ 6V	-40°C ~ 85°C	7.8mA, 7.8mA	Discontinued at DiGi Electronics	Tube
SN74HC151PWR	Texas Instruments	1 x 8:1	16-TSSOP	2V ~ 6V	-40°C ~ 85°C	7.8mA, 7.8mA	Active	Cut Tape & Digi-Reel
SN74HC151PWT	Texas Instruments	1 x 8:1	16-TSSOP	2V ~ 6V	-40°C ~ 85°C	7.8mA, 7.8mA	Discontinued at DiGi Electronics	Cut Tape & Digi-Reel
74HC151PW,118	Nexperia USA Inc.	1 x 8:1	16-TSSOP	2V ~ 6V	-40°C ~ 125°C	5.2mA, 5.2mA	Active	Tape & Reel
74HC151PW-Q100,118	Nexperia USA Inc.	1 x 8:1	16-TSSOP	2V ~ 6V	-40°C ~ 125°C	5.2mA, 5.2mA	Active	Tape & Reel

Engineering Selection Recommendations

Primary Recommendation: MC74HC151ADTR2G

The MC74HC151ADTR2G from onsemi is the optimal direct substitute. It maintains identical output current specifications (5.2mA), identical voltage supply range (2V ~ 6V), and identical package geometry (16-TSSOP). The part is currently active in production with extended operating temperature range (-55°C ~ 125°C), providing superior thermal performance compared to the obsolete MM74HC151MTCX. RoHS3 compliance and tape & reel packaging support high-volume manufacturing.

Secondary Recommendations: 74HC151PW,118 and 74HC151PW-Q100,118

Both Nexperia parts provide equivalent functionality with matching output current (5.2mA) and voltage specifications. The 74HC151PW-Q100,118 variant includes AEC-Q100 automotive qualification, suitable for automotive-grade applications. Both parts are active and available in tape & reel packaging.

Alternative: SN74HC151PWR

The Texas Instruments SN74HC151PWR is active and available but features higher output current (7.8mA). This part is suitable only when increased drive capability is required. The higher current specification does not prevent substitution but represents a design change from the original specification.

Not Recommended: SN74HC151PW and SN74HC151PWT

Both Texas Instruments parts are discontinued at DiGi Electronics, limiting long-term supply availability despite higher output current ratings.

Frequently Asked Questions (FAQ)

Q: Can I use SN74HC151PWR as a direct replacement for MM74HC151MTCX?

A: Yes, from a functional and pinout perspective. The SN74HC151PWR maintains identical 1 x 8:1 multiplexer configuration, 16-TSSOP package, and 2V ~ 6V supply voltage. However, the output current is 7.8mA versus 5.2mA on the original part. This higher current capability does not create compatibility issues and may improve signal integrity in some applications.

Q: What is the difference between direct and similar substitutes?

A: Direct substitutes maintain all electrical parameters identical to the original part. Similar substitutes provide equivalent functionality but may differ in output current, temperature range, or other secondary specifications. All listed parts maintain the critical 1 x 8:1 circuit configuration and 16-TSSOP package required for physical and functional compatibility.

Q: Does packaging type affect substitution?

A: Packaging type (Tube, Cut Tape & Digi-Reel, Tape & Reel) affects order quantity, handling, and manufacturing processes but does not affect electrical compatibility. Select packaging based on production volume and assembly line requirements.

Q: Is the 74HC151PW-Q100,118 suitable for non-automotive applications?

A: Yes. AEC-Q100 qualification indicates automotive-grade testing and reliability. Parts meeting automotive standards exceed standard industrial requirements and are fully compatible with non-automotive designs.

Q: Why does MC74HC151ADTR2G have a wider operating temperature range?

A: The MC74HC151ADTR2G is specified for -55°C ~ 125°C operation, compared to -40°C ~ 85°C for the original MM74HC151MTCX. This extended range reflects current manufacturing capabilities and does not indicate a design change. The part remains fully compatible across the original temperature specification.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts carry RoHS3 compliance certification, meeting current environmental and regulatory requirements.

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