MM74HC4051N Equivalent & Substitute Parts

Part Overview

The MM74HC4051N is an 8:1 multiplexer/demultiplexer IC manufactured by onsemi, housed in a 16-DIP package with 100Ohm on-state resistance. This part is classified as obsolete, making equivalent substitutes necessary for new designs and ongoing production requirements. The device functions as an analog switch matrix, enabling single-channel selection from eight input or output lines with low on-state resistance and minimal signal distortion across the operating bandwidth.

Key Parameters

Parameter	MM74HC4051N
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-DIP (0.300", 7.62mm)
Mounting Type	Through Hole
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility for the MM74HC4051N is determined by the following mandatory criteria:

Core Functional Requirements:

Multiplexer/Demultiplexer configuration: 8:1
Number of circuits: 1
Package type: 16-DIP (0.300", 7.62mm)
Mounting type: Through Hole

Electrical Compatibility Parameters:

On-state resistance within acceptable range for signal integrity
Supply voltage range compatibility (single or dual supply)
Operating temperature range coverage
Channel capacitance and leakage current specifications

Substitute parts are grouped into two categories based on on-state resistance alignment with the original specification:

Category A - Direct Resistance Match (100Ohm): MAX4051ACPE+, MAX4051EPE+, TC74HC4051APF Category B - Resistance Variation (130Ohm, 160Ohm): CD74HC4051E, MAX4558EPE+

All listed substitutes maintain the 8:1 multiplexer configuration, 16-DIP package format, and through-hole mounting compatibility required for direct board-level replacement.

Parameter Comparison

Parameter	MM74HC4051N	CD74HC4051E	MAX4051ACPE+	MAX4051EPE+	MAX4558EPE+	TC74HC4051APF
Manufacturer	onsemi	Texas Instruments	Analog Devices Inc./Maxim Integrated	Analog Devices Inc./Maxim Integrated	Analog Devices Inc./Maxim Integrated	Toshiba Semiconductor and Storage
Multiplexer/Demultiplexer Circuit	8:1	8:1	8:1	8:1	8:1	8:1
On-State Resistance (Max)	100Ohm	130Ohm	100Ohm	100Ohm	160Ohm	100Ohm
Channel-to-Channel Matching (ΔRon)	15Ohm	8.5Ohm	6Ohm	12Ohm	2Ohm	5Ohm
Voltage - Supply, Single (V+)	2V ~ 6V	2V ~ 6V	2V ~ 16V	2V ~ 16V	2V ~ 12V	2V ~ 6V
Voltage - Supply, Dual (V±)	±2V ~ 6V	±1V ~ 5V	±2.7V ~ 8V	±2.7V ~ 8V	±2V ~ 6V	±2V ~ 6V
Switch Time (Ton, Toff) (Max)	41ns, 32ns	-	175ns, 150ns	175ns, 150ns	150ns, 120ns	18ns, 29ns
-3dB Bandwidth	35MHz	180MHz	-	-	-	85MHz
Current - Leakage (IS(off)) (Max)	100nA	400nA	100pA	1nA	1nA	100nA
Operating Temperature	-40°C ~ 85°C	-55°C ~ 125°C	0°C ~ 70°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Package / Case	16-DIP (0.300", 7.62mm)	16-DIP (0.300", 7.62mm)	16-DIP (0.300", 7.62mm)	16-DIP (0.300", 7.62mm)	16-DIP (0.300", 7.62mm)	16-DIP (0.300", 7.62mm)
Product Status	Obsolete	Active	Active	Active	Active	Active
RoHS Status	-	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Primary Substitutes (Recommended for Direct Replacement):

MAX4051EPE+ and TC74HC4051APF are the preferred substitutes for MM74HC4051N applications. Both maintain 100Ohm on-state resistance, operate across the -40°C to 85°C temperature range, and support dual supply voltages of ±2V to 6V. Both parts are in active production status with ROHS3 compliance. MAX4051EPE+ offers extended single-supply voltage range (2V ~ 16V) and superior leakage current performance (1nA). TC74HC4051APF provides faster switch times (18ns, 29ns typical) and higher bandwidth (85MHz).

Secondary Substitutes (Application-Dependent):

MAX4051ACPE+ is suitable for applications requiring extended supply voltage range (2V ~ 16V single supply, ±2.7V ~ 8V dual supply) and extremely low leakage current (100pA). Operating temperature range is limited to 0°C ~ 70°C, restricting use in extended temperature applications.

CD74HC4051E accommodates wider operating temperature range (-55°C ~ 125°C) and offers superior bandwidth (180MHz) but exhibits higher on-state resistance (130Ohm) and increased leakage current (400nA), requiring circuit validation for signal integrity.

MAX4558EPE+ is applicable only where higher on-state resistance (160Ohm) is acceptable. This part offers superior channel-to-channel matching (2Ohm) and lowest crosstalk (-93dB @ 100kHz), suitable for precision analog switching applications with relaxed resistance requirements.

All substitutes are REACH Unaffected and classified under ECCN EAR99.

Frequently Asked Questions (FAQ)

Q: Can MM74HC4051N be directly replaced with any of these substitutes without circuit modification?

A: Direct pin-compatible replacement is possible with MAX4051EPE+, MAX4051ACPE+, TC74HC4051APF, and CD74HC4051E due to identical 16-DIP package pinout. However, on-state resistance variations (100Ohm to 160Ohm) may affect signal attenuation and impedance matching in high-frequency or precision applications. Circuit validation is required for applications sensitive to resistance tolerance.

Q: What is the primary difference between Category A and Category B substitutes?

A: Category A substitutes (MAX4051ACPE+, MAX4051EPE+, TC74HC4051APF) maintain the original 100Ohm on-state resistance specification. Category B substitutes (CD74HC4051E at 130Ohm, MAX4558EPE+ at 160Ohm) exhibit higher on-state resistance, which may introduce additional signal loss and require impedance compensation in sensitive circuits.

Q: Which substitute offers the best performance for high-frequency applications?

A: CD74HC4051E provides the highest -3dB bandwidth (180MHz) and is suitable for broadband signal switching. TC74HC4051APF offers 85MHz bandwidth with faster switch times (18ns, 29ns typical). For applications below 35MHz, all substitutes are functionally equivalent to the original MM74HC4051N.

Q: Are all substitutes RoHS compliant?

A: All listed substitutes are ROHS3 compliant. The original MM74HC4051N RoHS status is not specified in available documentation.

Q: What is the temperature range limitation for MAX4051ACPE+?

A: MAX4051ACPE+ operates within 0°C ~ 70°C, which is narrower than the original MM74HC4051N specification (-40°C ~ 85°C). This part is unsuitable for applications requiring extended temperature operation below 0°C or above 70°C.

Q: Can MAX4558EPE+ be used as a direct substitute despite higher on-state resistance?

A: MAX4558EPE+ is pin-compatible and functionally equivalent but exhibits 160Ohm on-state resistance compared to the original 100Ohm specification. Use is restricted to applications where this resistance increase does not compromise signal integrity, impedance matching, or system performance. Circuit simulation or bench testing is required to validate compatibility.

Q: Which substitute has the lowest leakage current?

A: MAX4051ACPE+ exhibits the lowest leakage current at 100pA maximum, compared to 100nA for MM74HC4051N. This characteristic is beneficial for low-power or high-impedance signal applications.

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