CD74HC4051M Equivalent & Substitute Parts

Part Overview

The CD74HC4051M is an 8:1 multiplexer/demultiplexer interface IC manufactured by Texas Instruments in 16-SOIC surface mount packaging. This part operates as a single-circuit analog switch with 130Ohm on-state resistance, supporting supply voltages from 2V to 6V (single supply) or ±1V to ±5V (dual supply). The device is classified as Last Time Buy, indicating production discontinuation. Equivalent and substitute parts are necessary to ensure design continuity and maintain component availability for new production runs and field replacements.

Key Parameters

Parameter	CD74HC4051M Value
Multiplexer/Demultiplexer Circuit Configuration	8:1
Number of Circuits	1
On-State Resistance (Max)	130Ohm
Channel-to-Channel Matching (ΔRon)	5Ohm
Voltage - Supply, Single (V+)	2V ~ 6V
Voltage - Supply, Dual (V±)	±1V ~ 5V
-3dB Bandwidth	180MHz
Channel Capacitance (CS(off), CD(off))	25pF
Current - Leakage (IS(off)) (Max)	400nA
Operating Temperature	-55°C ~ 125°C (TA)
Package / Case	16-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the CD74HC4051M is determined by the following critical parameters:

Primary Substitution Criteria:

Multiplexer/Demultiplexer circuit configuration: 8:1 (mandatory)
Number of circuits: 1 (mandatory)
Package type: 16-SOIC surface mount (mandatory for PCB compatibility)
On-state resistance: 130Ohm maximum (allows parts with lower resistance)
Supply voltage ranges: Must support 2V ~ 6V single supply minimum
Operating temperature: Must cover -55°C ~ 125°C or subset thereof
RoHS3 compliance and MSL 1 rating (mandatory for regulatory alignment)

Secondary Compatibility Factors:

Channel-to-channel matching tolerance (ΔRon)
Leakage current specifications
Bandwidth and capacitance characteristics
Switching time parameters

Substitute parts are grouped into three categories based on electrical performance alignment with the original CD74HC4051M specification.

Parameter Comparison

Parameter	CD74HC4051M	CD74HC4051M96	MC74HC4051ADR2G	74HC4051D,653	74LV4051D,118	MAX4051ACSE+T
Manufacturer	Texas Instruments	Texas Instruments	onsemi	Nexperia USA Inc.	Nexperia USA Inc.	Analog Devices Inc./Maxim Integrated
Multiplexer Configuration	8:1	8:1	8:1	8:1	8:1	8:1
On-State Resistance (Max)	130Ohm	130Ohm	100Ohm	120Ohm	85Ohm	100Ohm
Channel-to-Channel Matching (ΔRon)	5Ohm	5Ohm	10Ohm	6Ohm	2Ohm	6Ohm (Max)
Voltage - Supply, Single (V+)	2V ~ 6V	2V ~ 6V	2V ~ 6V	2V ~ 10V	1V ~ 6V	2V ~ 16V
Voltage - Supply, Dual (V±)	±1V ~ 5V	±1V ~ 5V	±2V ~ 6V	±1.5V ~ 5V	-	±2.7V ~ 8V
-3dB Bandwidth	180MHz	180MHz	80MHz	180MHz	200MHz	-
Channel Capacitance (CS(off), CD(off))	25pF	25pF	130pF	4.6pF	4.6pF	2pF, 2pF
Current - Leakage (IS(off)) (Max)	400nA	400nA	200nA	400nA	2µA	100pA
Operating Temperature	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-40°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
Product Status	Last Time Buy	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Direct Equivalent (Recommended Primary Substitute):

CD74HC4051M96 is the direct equivalent manufactured by Texas Instruments. This part maintains identical electrical specifications including 130Ohm on-state resistance, 5Ohm channel matching, 180MHz bandwidth, and 25pF channel capacitance. The only difference is packaging format (Cut Tape & Digi-Reel versus Tube) and active product status. This part is recommended as the primary substitute for new designs and production continuity.

Compatible Alternatives (Secondary Substitutes):

74HC4051D,653 (Nexperia USA Inc.) and MC74HC4051ADR2G (onsemi) are functionally compatible alternatives. Both maintain the 8:1 multiplexer configuration and 16-SOIC package. The Nexperia part offers improved specifications with 120Ohm resistance and 4.6pF capacitance. The onsemi part provides 100Ohm resistance with lower leakage current (200nA). Both are active products with ROHS3 compliance.

Extended Range Substitutes:

74LV4051D,118 (Nexperia USA Inc.) provides superior performance with 85Ohm on-state resistance, 2Ohm channel matching, and 200MHz bandwidth. However, it does not support dual supply operation (V± parameter unavailable). This part is suitable only for single-supply applications within the 1V ~ 6V range.

MAX4051ACSE+T (Analog Devices Inc./Maxim Integrated) offers the widest supply voltage range (2V ~ 16V single, ±2.7V ~ 8V dual) and lowest leakage current (100pA). Operating temperature is limited to 0°C ~ 70°C, making it unsuitable for extended temperature applications. This part is appropriate for commercial-grade designs with relaxed temperature requirements.

Automotive Grade Option:

74HCT4051D-Q100,11 (Nexperia USA Inc.) is qualified to AEC-Q100 automotive standards with 120Ohm resistance and 16-SOIC package. Supply voltage is restricted to 4.5V ~ 5.5V single supply, limiting its use to TTL-compatible applications. This part is designated for automotive and mission-critical applications requiring formal qualification.

Frequently Asked Questions (FAQ)

Q: Can I use MAX4051ACSE+T as a direct replacement for CD74HC4051M in all applications?

A: MAX4051ACSE+T is electrically compatible for the 8:1 multiplexer function and 16-SOIC package. However, the operating temperature range is restricted to 0°C ~ 70°C compared to the original -55°C ~ 125°C specification. Use this part only in commercial-grade designs that do not require extended temperature operation.

Q: What is the difference between CD74HC4051M and CD74HC4051M96?

A: Both parts are manufactured by Texas Instruments with identical electrical specifications. CD74HC4051M is supplied in Tube packaging, while CD74HC4051M96 is supplied in Cut Tape & Digi-Reel format. CD74HC4051M96 is the active product; CD74HC4051M is Last Time Buy status.

Q: Is MC74HC4051ADR2G suitable for applications requiring -55°C operation?

A: Yes. MC74HC4051ADR2G operates across -55°C ~ 125°C temperature range, matching the original CD74HC4051M specification. The part maintains 8:1 multiplexer configuration and 16-SOIC package compatibility.

Q: Can 74LV4051D,118 replace CD74HC4051M in dual-supply applications?

A: No. 74LV4051D,118 does not support dual supply operation (V± parameter is not specified). This part is limited to single-supply applications within 1V ~ 6V range. For dual-supply designs, use CD74HC4051M96, MC74HC4051ADR2G, 74HC4051D,653, or MAX4051ACSE+T.

Q: What is the significance of the 16-SOIC package specification?

A: The 16-SOIC (0.154", 3.90mm Width) package is a surface mount form factor with standardized pin spacing and footprint. All listed substitute parts use this identical package, ensuring direct PCB compatibility without layout modifications.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, matching the original CD74HC4051M environmental and regulatory specifications.

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

A: 74LV4051D,118 provides the highest -3dB bandwidth at 200MHz and the lowest channel capacitance at 4.6pF, making it optimal for high-frequency signal switching. However, this part is limited to single-supply operation.

Q: Can I use 74HCT4051D-Q100,11 in non-automotive applications?

A: Yes. 74HCT4051D-Q100,11 is functionally compatible with the 8:1 multiplexer configuration and 16-SOIC package. However, its supply voltage range is restricted to 4.5V ~ 5.5V (TTL-compatible levels), limiting use to applications operating at standard 5V logic levels. The AEC-Q100 qualification is an additional feature, not a restriction.

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