MM74HC4051M Equivalent & Substitute Parts

Part Overview

The MM74HC4051M is an 8:1 multiplexer/demultiplexer IC manufactured by onsemi in 16-SOIC surface mount packaging. This device functions as a single-circuit analog switch with 100Ohm on-state resistance, designed for signal routing applications across 2V to 6V single supply or ±2V to 6V dual supply configurations. The product is classified as obsolete, making equivalent substitutes necessary for ongoing production and maintenance applications. Substitute parts must maintain functional compatibility through matching multiplexer configuration, package type, and electrical operating parameters.

Key Parameters

Parameter	MM74HC4051M Value
Multiplexer/Demultiplexer Circuit	8:1
Number of Circuits	1
On-State Resistance (Max)	100Ohm
Channel-to-Channel Matching (ΔRon)	15Ohm
Voltage - Supply, Single (V+)	2V ~ 6V
Voltage - Supply, Dual (V±)	±2V ~ 6V
Switch Time (Ton, Toff) (Max)	41ns, 32ns
-3dB Bandwidth	35MHz
Channel Capacitance (CS(off), CD(off))	5pF, 90pF
Current - Leakage (IS(off)) (Max)	100nA
Crosstalk	-50dB @ 1MHz
Operating Temperature	-40°C ~ 85°C
Package / Case	16-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following mandatory criteria:

Core Functional Requirements:

Multiplexer/Demultiplexer configuration must be 8:1
Single circuit configuration (1 circuit)
16-SOIC surface mount package (0.154", 3.90mm Width)

Electrical Compatibility Parameters:

On-state resistance within acceptable tolerance relative to 100Ohm baseline
Supply voltage ranges must support the application's 2V ~ 6V single supply or ±2V ~ 6V dual supply requirement
Operating temperature range must encompass or exceed -40°C ~ 85°C

Performance Considerations:

Switch timing, bandwidth, and leakage current specifications determine suitability for specific signal frequency and precision requirements
Channel capacitance and crosstalk performance affect high-frequency signal integrity

Substitute parts are grouped by their deviation from the MM74HC4051M baseline specifications. Parts with on-state resistance between 100Ohm and 155Ohm, matching supply voltage compatibility, and identical package configuration are considered direct functional equivalents.

Parameter Comparison

Parameter	MM74HC4051M	NLV74HC4051ADR2G	74HC4051D (Toshiba)	74HC4051D,653 (Nexperia)	74HCT4051D	CD74HC4051M96	HEF4051BT,653	MAX4051ACSE+
Multiplexer Configuration	8:1	8:1	8:1	8:1	8:1	8:1	8:1	8:1
On-State Resistance (Max)	100Ohm	100Ohm	130Ohm	120Ohm	120Ohm	130Ohm	155Ohm	100Ohm
Channel-to-Channel Matching (ΔRon)	15Ohm	10Ohm	4Ohm	6Ohm	6Ohm	5Ohm	5Ohm	6Ohm (Max)
Voltage - Supply, Single (V+)	2V ~ 6V	2V ~ 6V	2V ~ 6V	2V ~ 10V	4.5V ~ 5.5V	2V ~ 6V	3V ~ 15V	2V ~ 16V
Voltage - Supply, Dual (V±)	±2V ~ 6V	±2V ~ 6V	-	±1.5V ~ 5V	±1V ~ 5V	±1V ~ 5V	-	±2.7V ~ 8V
Switch Time Ton (Max)	41ns	-	34ns	51ns	39ns	-	-	175ns
Switch Time Toff (Max)	32ns	-	32ns	42ns	32ns	-	-	150ns
-3dB Bandwidth	35MHz	80MHz	-	180MHz	180MHz	180MHz	70MHz	-
Current - Leakage (IS(off)) (Max)	100nA	200nA	1µA	400nA	400nA	400nA	200nA	100pA
Crosstalk	-50dB @ 1MHz	-60dB @ 1MHz	-50dB @ 1MHz	-	-	-	-50dB @ 1MHz	-90dB @ 100kHz
Operating Temperature	-40°C ~ 85°C	-55°C ~ 125°C	-40°C ~ 85°C	-40°C ~ 125°C	-40°C ~ 125°C	-55°C ~ 125°C	-40°C ~ 125°C	0°C ~ 70°C
Package / Case	16-SOIC	16-SOIC	16-SOIC	16-SOIC	16-SOIC	16-SOIC	16-SOIC	16-SOIC
Product Status	Obsolete	Obsolete	Active	Active	Active	Active	Active	Active
RoHS Status	-	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Direct Functional Equivalents (Highest Compatibility):

NLV74HC4051ADR2G and MAX4051ACSE+ provide the closest electrical match to MM74HC4051M with 100Ohm on-state resistance. NLV74HC4051ADR2G maintains identical supply voltage ranges and extends operating temperature to -55°C ~ 125°C with AEC-Q100 automotive qualification. MAX4051ACSE+ offers superior leakage current performance (100pA vs 100nA) and extended single supply range to 16V, though operating temperature is limited to 0°C ~ 70°C.

Active Production Alternatives (Recommended for New Designs):

74HC4051D (Toshiba) and 74HC4051D,653 (Nexperia) are active production parts with 16-SOIC packaging. Toshiba's variant maintains the -40°C ~ 85°C temperature range with 130Ohm on-state resistance and superior channel matching (4Ohm). Nexperia's variant extends single supply to 10V and dual supply to ±1.5V ~ 5V with 120Ohm on-state resistance, supporting broader application requirements.

Extended Temperature Range Options:

CD74HC4051M96 (Texas Instruments) and 74HCT4051D (Toshiba) support -55°C ~ 125°C operating temperature. CD74HC4051M96 maintains 2V ~ 6V single supply compatibility with 130Ohm on-state resistance. 74HCT4051D is restricted to 4.5V ~ 5.5V single supply but offers 180MHz bandwidth and improved switch timing (39ns, 32ns).

Compliance Considerations:

All substitute parts listed are ROHS3 compliant and REACH unaffected. NLV74HC4051ADR2G carries AEC-Q100 automotive qualification, suitable for automotive and industrial applications requiring enhanced reliability documentation.

Frequently Asked Questions (FAQ)

Q: Can MM74HC4051M be directly replaced with 74HC4051D,653 (Nexperia)?

A: Yes, with supply voltage considerations. Both are 8:1 multiplexers in 16-SOIC packaging. The Nexperia part has 120Ohm on-state resistance versus 100Ohm in the original, and extends single supply range to 10V. If your application operates within 2V ~ 6V, this substitution is functionally compatible. The 180MHz bandwidth of the Nexperia part exceeds the original 35MHz specification.

Q: What is the difference between 74HC4051D (Toshiba) and 74HC4051D,653 (Nexperia)?

A: Both are 8:1 multiplexers in 16-SOIC packaging with identical base part number 74HC4051. Toshiba's variant has 130Ohm on-state resistance with superior channel matching (4Ohm) and operates at -40°C ~ 85°C. Nexperia's variant has 120Ohm on-state resistance, extends single supply to 10V, and operates at -40°C ~ 125°C. Selection depends on supply voltage range and temperature requirements.

Q: Is MAX4051ACSE+ suitable for applications requiring -40°C operation?

A: No. MAX4051ACSE+ operates from 0°C ~ 70°C, which does not cover the -40°C lower limit of the original MM74HC4051M. This part is unsuitable for low-temperature applications. Use NLV74HC4051ADR2G, CD74HC4051M96, or 74HCT4051D for extended low-temperature operation.

Q: Why does HEF4051BT,653 have higher on-state resistance (155Ohm)?

A: HEF4051BT,653 is a CMOS device from the HEF4051 family with different process technology than the 74HC4051 series. The 155Ohm on-state resistance reflects this design. This part is suitable only if your application tolerates higher resistance and does not require dual supply operation (HEF4051BT,653 supports single supply 3V ~ 15V only).

Q: What packaging options are available for substitutes?

A: All listed substitutes use 16-SOIC (0.154", 3.90mm Width) surface mount packaging, matching the original MM74HC4051M. Packaging variants differ only in tape format: Tube, Cut Tape (CT) & Digi-Reel, or Tape & Reel (TR). These are supply format differences, not physical package differences.

Q: Which substitute offers the best leakage current performance?

A: MAX4051ACSE+ provides the lowest leakage current at 100pA maximum, compared to 100nA in MM74HC4051M. This superior performance is beneficial for precision analog switching applications where leakage current affects signal accuracy. However, MAX4051ACSE+ is limited to 0°C ~ 70°C operation.

Q: Can I use 74HCT4051D in place of MM74HC4051M?

A: 74HCT4051D is compatible for packaging and multiplexer configuration but has restricted supply voltage range (4.5V ~ 5.5V single supply only). Use this part only if your application operates within this narrow voltage window. The original MM74HC4051M supports 2V ~ 6V, providing broader flexibility.

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