MM74HC4051MTC Equivalent & Substitute Parts

Part Overview

The MM74HC4051MTC is an 8:1 multiplexer/demultiplexer IC manufactured by onsemi in a 16-TSSOP surface mount package. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The device functions as a single-circuit analog switch with 100Ohm on-state resistance, suitable for signal routing applications across 2V to 6V single supply or ±2V to 6V dual supply configurations.

Key Parameters

Parameter	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
Mounting Type	Surface Mount
Package / Case	16-TSSOP (0.173", 4.40mm Width)
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the MM74HC4051MTC is determined by the following critical parameters:

Mandatory Compatibility Criteria:

Multiplexer/Demultiplexer configuration: 8:1
Number of circuits: 1
Package type: 16-TSSOP surface mount
On-state resistance: 100Ohm to 130Ohm maximum (within acceptable range for signal routing applications)
Supply voltage compatibility: Minimum 2V single supply or ±2V dual supply support
Mounting type: Surface mount

Substitute parts are grouped into three categories based on electrical performance:

Category 1 - Direct Functional Equivalents (100Ohm on-state resistance): M74HCT4051ADTR2G and NLVHC4051ADTR2G maintain the 100Ohm on-state resistance specification with enhanced bandwidth (80MHz) and lower channel-to-channel matching (10Ohm). These parts support extended operating temperature ranges and automotive qualification where applicable.

Category 2 - Compatible Alternatives (120Ohm on-state resistance): 74HC4051PW,112, 74HC4051PW,118, and 74HCT4051PW-Q100,1 feature 120Ohm on-state resistance with superior bandwidth performance (180MHz) and tighter channel-to-channel matching (6Ohm). These parts support wider supply voltage ranges (2V to 10V single supply) and extended temperature operation to 125°C.

Category 3 - Functional Substitutes (130Ohm on-state resistance): CD74HC4051PWR, CD74HC4051PWT, and CD74HC4051QPWRG4Q1 from Texas Instruments provide 130Ohm on-state resistance with 180MHz bandwidth. These parts are actively produced or available as last-time-buy inventory and support automotive-grade qualification.

Category 4 - Extended Supply Range Alternative (155Ohm on-state resistance): HEF4051BTT,118 operates across 3V to 15V single supply with 155Ohm on-state resistance and 70MHz bandwidth. This part is suitable for applications requiring higher supply voltage operation.

Parameter Comparison

Part Number	Manufacturer	On-State Resistance (Max)	ΔRon (Max)	V+ Supply	V± Supply	-3dB Bandwidth	Operating Temp	Product Status	Packaging
MM74HC4051MTC	onsemi	100Ohm	15Ohm	2V ~ 6V	±2V ~ 6V	35MHz	-40°C ~ 85°C	Obsolete	16-TSSOP
M74HCT4051ADTR2G	onsemi	100Ohm	10Ohm	2V ~ 6V	±2V ~ 6V	80MHz	-55°C ~ 125°C	Obsolete	16-TSSOP
NLVHC4051ADTR2G	onsemi	100Ohm	10Ohm	2V ~ 6V	±2V ~ 6V	80MHz	-55°C ~ 125°C	Obsolete	16-TSSOP
74HC4051PW,112	Nexperia USA Inc.	120Ohm	6Ohm	2V ~ 10V	±1.5V ~ 5V	180MHz	-40°C ~ 125°C	Obsolete	16-TSSOP
74HC4051PW,118	Nexperia USA Inc.	120Ohm	6Ohm	2V ~ 10V	±1.5V ~ 5V	180MHz	-40°C ~ 125°C	Active	16-TSSOP
74HCT4051PW-Q100,1	Nexperia USA Inc.	120Ohm	6Ohm	4.5V ~ 5.5V	±1V ~ 5V	180MHz	-40°C ~ 125°C	Active	16-TSSOP
CD74HC4051PWR	Texas Instruments	130Ohm	8.5Ohm	2V ~ 6V	±1V ~ 5V	180MHz	-55°C ~ 125°C	Active	16-TSSOP
CD74HC4051PWT	Texas Instruments	130Ohm	5Ohm	2V ~ 6V	±1V ~ 5V	180MHz	-55°C ~ 125°C	Last Time Buy	16-TSSOP
CD74HC4051QPWRG4Q1	Texas Instruments	130Ohm	5Ohm	2V ~ 6V	±1V ~ 5V	180MHz	-40°C ~ 125°C	Last Time Buy	16-TSSOP
HEF4051BTT,118	Nexperia USA Inc.	155Ohm	5Ohm	3V ~ 15V	N/A	70MHz	-40°C ~ 125°C	Active	16-TSSOP

Engineering Selection Recommendations

For direct replacement with minimal circuit redesign: Select 74HC4051PW,118 (Nexperia, Active status) or CD74HC4051PWR (Texas Instruments, Active status). Both parts maintain 16-TSSOP packaging, support the required 2V to 6V supply range, and offer superior bandwidth (180MHz) compared to the obsolete MM74HC4051MTC. The 74HC4051PW,118 is currently in active production with 2100 units in stock, providing long-term availability.

For automotive or extended temperature applications: Select 74HCT4051PW-Q100,1 (Nexperia, Active, AEC-Q100 qualified) or CD74HC4051QPWRG4Q1 (Texas Instruments, Last Time Buy, AEC-Q100 qualified). Both parts meet automotive qualification standards and operate across -40°C to 125°C.

For applications requiring extended supply voltage operation: Select HEF4051BTT,118 (Nexperia, Active status) if the circuit can accommodate 3V to 15V single supply operation. This part provides the widest supply voltage range and is actively produced.

For applications with strict on-state resistance requirements: Select M74HCT4051ADTR2G or NLVHC4051ADTR2G if 100Ohm on-state resistance is mandatory. Both parts maintain the original 100Ohm specification with improved channel-to-channel matching (10Ohm vs. 15Ohm).

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with higher on-state resistance (120Ohm or 130Ohm) in place of the MM74HC4051MTC (100Ohm)?

A: Yes, within design constraints. The 20-30Ohm increase in on-state resistance will proportionally increase signal attenuation and reduce bandwidth in analog switching applications. Verify that your circuit's impedance matching and signal integrity requirements accommodate this change. For digital switching applications, the difference is typically negligible.

Q: What is the difference between the 74HC4051PW,112 and 74HC4051PW,118 variants?

A: Both parts are electrically identical with 120Ohm on-state resistance and 180MHz bandwidth. The primary difference is packaging: 74HC4051PW,112 is supplied in Tube packaging (Obsolete status), while 74HC4051PW,118 is supplied in Cut Tape & Digi-Reel packaging (Active status). For new designs, select the 74HC4051PW,118 variant.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed carry RoHS3 compliance certification. The original MM74HC4051MTC does not specify RoHS status in the provided data.

Q: Can I use HEF4051BTT,118 as a direct substitute?

A: HEF4051BTT,118 is functionally compatible but requires circuit evaluation. The 155Ohm on-state resistance is 55Ohm higher than the original part, and the -3dB bandwidth is reduced to 70MHz (vs. 35MHz for MM74HC4051MTC). The part supports 3V to 15V single supply only, with no dual supply option. Use this part only if your application can accommodate these electrical differences.

Q: What is the difference between onsemi and Nexperia variants?

A: Both manufacturers produce pin-compatible 8:1 multiplexer ICs in 16-TSSOP packaging. Nexperia parts (74HC4051PW series) offer higher bandwidth (180MHz) and wider supply voltage ranges (2V to 10V). onsemi parts (M74HCT4051ADTR2G, NLVHC4051ADTR2G) maintain 100Ohm on-state resistance with 80MHz bandwidth. Select based on your specific bandwidth and supply voltage requirements.

Q: Is the MM74HC4051MTC still available for purchase?

A: The MM74HC4051MTC is classified as obsolete. However, 745 units are listed as new original in stock. For long-term design support, select an active-status substitute such as 74HC4051PW,118 (2100 units in stock) or CD74HC4051PWR (73400 units in stock).

Q: Do all substitute parts use the same 16-TSSOP package?

A: Yes. All substitute parts listed use the 16-TSSOP (0.173", 4.40mm Width) surface mount package, ensuring PCB layout compatibility with the original MM74HC4051MTC design.

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