74VHC4051WM Equivalent & Substitute Parts

Part Overview

The 74VHC4051WM is an 8:1 multiplexer/demultiplexer IC manufactured by onsemi, housed in a 16-SOIC 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 a single-circuit analog switch suitable for signal routing applications across supply voltages of 2V to 6V (single supply) or ±1V to 6V (dual supply).

Key Parameters

Parameter	74VHC4051WM
Multiplexer/Demultiplexer Circuit	8:1
Number of Circuits	1
On-State Resistance (Max)	100Ohm
Channel-to-Channel Matching (ΔRon)	10Ohm
Voltage - Supply, Single (V+)	2V ~ 6V
Voltage - Supply, Dual (V±)	±1V ~ 6V
Switch Time (Ton, Toff) (Max)	41ns, 32ns
Channel Capacitance (CS(off), CD(off))	5pF, 90pF
Current - Leakage (IS(off)) (Max)	200nA
Crosstalk	-50dB @ 1MHz
Operating Temperature	-40°C ~ 85°C
Package / Case	16-SOIC (0.295", 7.50mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility for the 74VHC4051WM is determined by the following mandatory parameters:

Circuit Configuration: 8:1 multiplexer/demultiplexer with single circuit
On-State Resistance: Maximum 100Ohm (allows parts with equal or lower resistance)
Package Type: 16-SOIC surface mount
Supply Voltage Compatibility: Minimum overlap with 2V ~ 6V single supply range
Leakage Current: Maximum 200nA or lower
Operating Temperature Range: Must support -40°C minimum

Substitute parts are grouped into two categories based on active product status and packaging availability:

Category A - Active Status, Direct Replacement: MC74HC4051ADWG and MC74HC4051ADWR2G (onsemi) maintain identical electrical specifications with extended operating temperature range (-55°C ~ 125°C) and active product status.

Category B - Active Status, Alternative Specifications: SN74LV4051ADR (Texas Instruments), HEF4051BT,653 (Nexperia), and MAX4051AESE+ (Analog Devices/Maxim) meet core substitution criteria with variations in on-state resistance, supply voltage ranges, and performance characteristics.

Parameter Comparison

Parameter	74VHC4051WM	MC74HC4051ADWG	MC74HC4051ADWR2G	SN74LV4051ADR	HEF4051BT,653	MAX4051AESE+
Manufacturer	onsemi	onsemi	onsemi	Texas Instruments	Nexperia USA Inc.	Analog Devices Inc./Maxim Integrated
Multiplexer/Demultiplexer Circuit	8:1	8:1	8:1	8:1	8:1	8:1
On-State Resistance (Max)	100Ohm	100Ohm	100Ohm	75Ohm	155Ohm	100Ohm
Channel-to-Channel Matching (ΔRon)	10Ohm	10Ohm	10Ohm	1.3Ohm	5Ohm	6Ohm (Max)
Voltage - Supply, Single (V+)	2V ~ 6V	2V ~ 6V	2V ~ 6V	2V ~ 5.5V	3V ~ 15V	2V ~ 16V
Voltage - Supply, Dual (V±)	±1V ~ 6V	±2V ~ 6V	±2V ~ 6V	-	-	±2.7V ~ 8V
Current - Leakage (IS(off)) (Max)	200nA	200nA	200nA	100nA	200nA	100pA
Operating Temperature	-40°C ~ 85°C	-55°C ~ 125°C	-55°C ~ 125°C	-40°C ~ 85°C	-40°C ~ 125°C	-40°C ~ 85°C
Package / Case	16-SOIC (0.295", 7.50mm Width)	16-SOIC (0.295", 7.50mm Width)	16-SOIC (0.295", 7.50mm Width)	16-SOIC (0.154", 3.90mm Width)	16-SOIC (0.154", 3.90mm Width)	16-SOIC (0.154", 3.90mm Width)
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)

MC74HC4051ADWG and MC74HC4051ADWR2G are the preferred substitutes. Both are manufactured by onsemi with active product status and ROHS3 compliance. These parts maintain identical electrical specifications to the 74VHC4051WM with extended operating temperature range (-55°C ~ 125°C). The primary difference is packaging: MC74HC4051ADWG is supplied in Tube packaging, while MC74HC4051ADWR2G is supplied in Tape & Reel format. Selection between these two depends on procurement and assembly requirements.

Secondary Substitutes (Application-Dependent Selection)

SN74LV4051ADR (Texas Instruments) offers superior performance characteristics including lower on-state resistance (75Ohm), tighter channel-to-channel matching (1.3Ohm), and faster switch times (14ns). This part is suitable for applications requiring lower signal distortion and faster switching. Supply voltage range is limited to 2V ~ 5.5V single supply.

HEF4051BT,653 (Nexperia) provides extended single supply voltage range (3V ~ 15V) with active product status and ROHS3 compliance. On-state resistance is higher at 155Ohm with improved channel-to-channel matching (5Ohm). This part is suitable for applications requiring higher supply voltage flexibility.

MAX4051AESE+ (Analog Devices/Maxim Integrated) offers the widest supply voltage range (2V ~ 16V single supply, ±2.7V ~ 8V dual supply) with exceptional leakage current performance (100pA) and superior crosstalk isolation (-90dB @ 100kHz). This part is suitable for precision analog switching applications requiring minimal leakage and superior signal isolation.

All substitute parts maintain ROHS3 compliance and REACH unaffected status, meeting current environmental and regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can MC74HC4051ADWG directly replace 74VHC4051WM without PCB modifications?

A: Yes. Both parts share identical 16-SOIC package dimensions (0.295", 7.50mm Width), pinout, and electrical specifications. No PCB layout changes are required. The primary difference is product status (active vs. obsolete) and extended operating temperature range on the substitute.

Q: What is the difference between MC74HC4051ADWG and MC74HC4051ADWR2G?

A: Both parts are electrically identical. The difference is packaging format: MC74HC4051ADWG is supplied in Tube packaging for manual assembly or small-volume procurement, while MC74HC4051ADWR2G is supplied in Tape & Reel format for automated assembly lines. Select based on your assembly process requirements.

Q: Why do some substitutes have different package dimensions (0.154" vs. 0.295")?

A: Package width variation reflects different manufacturing standards. SN74LV4051ADR, HEF4051BT,653, and MAX4051AESE+ use narrower 16-SOIC packages (0.154", 3.90mm Width) compared to the original 74VHC4051WM (0.295", 7.50mm Width). While pinout remains compatible, PCB footprint dimensions differ. Verify PCB layout compatibility before substitution.

Q: Which substitute offers the best performance for low-noise analog applications?

A: MAX4051AESE+ provides superior performance for precision applications with leakage current of 100pA (versus 200nA on the original), crosstalk isolation of -90dB @ 100kHz, and charge injection of 2pC. However, package dimensions differ, requiring PCB footprint verification.

Q: Can I use SN74LV4051ADR if my circuit operates at 6V supply?

A: No. SN74LV4051ADR maximum single supply voltage is 5.5V. For 6V operation, use MC74HC4051ADWG, MC74HC4051ADWR2G, HEF4051BT,653, or MAX4051AESE+.

Q: Are all substitutes ROHS3 compliant?

A: Yes. All active substitute parts listed (MC74HC4051ADWG, MC74HC4051ADWR2G, SN74LV4051ADR, HEF4051BT,653, and MAX4051AESE+) are ROHS3 compliant and REACH unaffected, meeting current environmental regulations.

Q: What is the significance of Channel-to-Channel Matching (ΔRon)?

A: Channel-to-Channel Matching indicates resistance variation between different multiplexer channels. Lower values indicate better uniformity across channels. SN74LV4051ADR (1.3Ohm) provides the tightest matching, while the original 74VHC4051WM and onsemi substitutes specify 10Ohm. For applications requiring precise channel-to-channel signal consistency, lower ΔRon values are preferred.

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