CD74HC4051MT Equivalent & Substitute Parts

Part Overview

The CD74HC4051MT is an 8:1 multiplexer/demultiplexer IC manufactured by Texas Instruments, housed in a 16-SOIC surface mount package. This device functions as a single-circuit analog switch with 130Ohm maximum on-state resistance, operating across a supply voltage range of 2V to 6V (single supply) or ±1V to ±5V (dual supply). The part is classified as Last Time Buy, indicating discontinued production status. Identifying equivalent and substitute parts is necessary to ensure design continuity and maintain supply chain reliability for applications requiring 8:1 multiplexing functionality.

Key Parameters

Parameter	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)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the CD74HC4051MT is determined by the following critical parameters:

Primary Compatibility Criteria:

Multiplexer/Demultiplexer circuit configuration must be 8:1
Single circuit configuration (1 circuit)
16-SOIC package footprint compatibility
Surface mount mounting type
Operating temperature range must encompass or exceed -55°C to 125°C

Secondary Electrical Criteria:

On-state resistance (130Ohm maximum for CD74HC4051MT) establishes the baseline; substitutes with lower resistance values are acceptable
Channel-to-channel matching (ΔRon) of 5Ohm or better ensures signal integrity
Supply voltage ranges must support the application's operating conditions
Bandwidth of 180MHz or greater maintains signal fidelity
Leakage current specifications must not exceed application requirements

Compliance & Regulatory:

RoHS3 compliance required
MSL rating of 1 (Unlimited) for standard applications

Substitutes are grouped into two categories: direct equivalents from alternative manufacturers maintaining identical electrical specifications, and functional alternatives with improved or comparable performance characteristics within the same package family.

Parameter Comparison

Part Number	Manufacturer	On-State Resistance (Max)	ΔRon	V+ Range	V± Range	Bandwidth	Leakage (Max)	Temp Range	Status
CD74HC4051MT	Texas Instruments	130Ohm	5Ohm	2V ~ 6V	±1V ~ 5V	180MHz	400nA	-55°C ~ 125°C	Last Time Buy
CD74HC4051M96	Texas Instruments	130Ohm	5Ohm	2V ~ 6V	±1V ~ 5V	180MHz	400nA	-55°C ~ 125°C	Active
MC74HC4051ADR2G	onsemi	100Ohm	10Ohm	2V ~ 6V	±2V ~ 6V	80MHz	200nA	-55°C ~ 125°C	Active
74HC4051D,653	Nexperia USA Inc.	120Ohm	6Ohm	2V ~ 10V	±1.5V ~ 5V	180MHz	400nA	-40°C ~ 125°C	Active
74HCT4051D-Q100,11	Nexperia USA Inc.	120Ohm	6Ohm	4.5V ~ 5.5V	±1V ~ 5V	180MHz	400nA	-40°C ~ 125°C	Active
74LV4051D,118	Nexperia USA Inc.	85Ohm	2Ohm	1V ~ 6V	N/A	200MHz	2µA	-40°C ~ 125°C	Active
MAX4051ACSE+	Analog Devices Inc./Maxim Integrated	100Ohm	6Ohm (Max)	2V ~ 16V	±2.7V ~ 8V	N/A	100pA	0°C ~ 70°C	Active
MAX4051ACSE+T	Analog Devices Inc./Maxim Integrated	100Ohm	6Ohm (Max)	2V ~ 16V	±2.7V ~ 8V	N/A	100pA	0°C ~ 70°C	Active
MAX4051AESE+	Analog Devices Inc./Maxim Integrated	100Ohm	6Ohm (Max)	2V ~ 16V	±2.7V ~ 8V	N/A	100pA	-40°C ~ 85°C	Active
MAX4051AESE+T	Analog Devices Inc./Maxim Integrated	100Ohm	6Ohm (Max)	2V ~ 16V	±2.7V ~ 8V	N/A	100pA	-40°C ~ 85°C	Active
MAX4051CSE+	Analog Devices Inc./Maxim Integrated	100Ohm	12Ohm (Max)	2V ~ 16V	±2.7V ~ 8V	N/A	1nA	0°C ~ 70°C	Active

Engineering Selection Recommendations

Tier 1 - Direct Equivalent (Recommended Primary Substitute):

CD74HC4051M96 from Texas Instruments is the direct equivalent to CD74HC4051MT. This part maintains identical electrical specifications including 130Ohm on-state resistance, 5Ohm channel matching, 180MHz bandwidth, and 400nA maximum leakage current. The only difference is packaging format (Cut Tape & Digi-Reel versus Tape & Reel), with CD74HC4051M96 in Active product status. This substitution requires no design modifications and provides the highest compatibility assurance.

Tier 2 - Functional Equivalents (Alternative Manufacturers):

74HC4051D,653 from Nexperia USA Inc. operates within the same HC logic family with marginally lower on-state resistance (120Ohm) and extended single-supply voltage range (2V to 10V). Operating temperature range is -40°C to 125°C, which covers the CD74HC4051MT's lower temperature limit of -55°C only in the upper range. This part is suitable for applications not requiring the full -55°C minimum temperature specification.

74LV4051D,118 from Nexperia USA Inc. offers superior performance with 85Ohm on-state resistance, 2Ohm channel matching, and 200MHz bandwidth. However, this part operates on single supply only (1V to 6V) without dual supply capability. The operating temperature range is -40°C to 125°C. Selection of this part requires confirmation that dual supply operation is not required.

Tier 3 - Enhanced Performance Alternatives (Precision Applications):

MAX4051 series devices from Analog Devices Inc./Maxim Integrated provide superior leakage current performance (100pA to 1nA versus 400nA) and extended supply voltage ranges (2V to 16V single supply, ±2.7V to ±8V dual supply). These parts are suitable for low-power and precision analog switching applications. Operating temperature ranges vary by grade: MAX4051ACSE+ and MAX4051CSE+ operate 0°C to 70°C, while MAX4051AESE+ variants extend to -40°C to 85°C. These parts are not suitable for applications requiring -55°C minimum temperature operation.

Tier 4 - Conditional Substitutes:

MC74HC4051ADR2G from onsemi is functionally compatible but exhibits reduced bandwidth (80MHz versus 180MHz) and higher channel matching variation (10Ohm versus 5Ohm). This part is suitable only for lower-frequency applications where bandwidth and matching precision are not critical.

74HCT4051D-Q100,11 from Nexperia USA Inc. is qualified to AEC-Q100 automotive standards and operates within a narrower single-supply range (4.5V to 5.5V). This part is restricted to automotive applications with 5V nominal supply voltage.

Compliance Verification:

All recommended substitutes maintain RoHS3 compliance and MSL rating of 1 (Unlimited). No additional environmental or regulatory constraints apply to the substitution decision.

Frequently Asked Questions (FAQ)

Q: Can CD74HC4051M96 be used as a direct replacement for CD74HC4051MT?

A: Yes. CD74HC4051M96 is electrically and functionally identical to CD74HC4051MT. The only difference is packaging format (Cut Tape & Digi-Reel versus Tape & Reel). Both parts are 16-SOIC surface mount packages with identical pinouts and electrical specifications. No circuit modifications are required.

Q: What is the primary reason to substitute the CD74HC4051MT?

A: CD74HC4051MT is classified as Last Time Buy, indicating Texas Instruments has discontinued production. CD74HC4051M96 from the same manufacturer provides continuity with identical specifications and Active product status, ensuring long-term availability.

Q: Are Nexperia 74HC4051 parts compatible with the CD74HC4051MT?

A: Yes, with minor considerations. The 74HC4051D,653 from Nexperia maintains the same 8:1 multiplexer configuration, 16-SOIC package, and comparable electrical performance (120Ohm on-state resistance versus 130Ohm). The operating temperature range is -40°C to 125°C, which does not extend to the -55°C minimum of the original part. Substitution is valid for applications operating above -40°C.

Q: Can MAX4051 devices replace CD74HC4051MT?

A: MAX4051 devices are functionally compatible for 8:1 multiplexing in 16-SOIC packages but have different operating temperature ranges and supply voltage specifications. MAX4051AESE+ and MAX4051AESE+T extend to -40°C to 85°C, which does not cover the -55°C minimum requirement. MAX4051 parts are suitable for applications operating within 0°C to 70°C or -40°C to 85°C ranges. These parts offer superior leakage current performance (100pA to 1nA) and are preferred for precision low-power applications.

Q: What is the difference between 74HC4051 and 74HCT4051 logic families?

A: 74HC4051 operates across a wide supply voltage range (2V to 6V single supply). 74HCT4051 is optimized for TTL-compatible 5V systems with a narrower supply range (4.5V to 5.5V). The 74HCT4051D-Q100,11 variant includes AEC-Q100 automotive qualification. Selection depends on supply voltage requirements and application environment.

Q: Why does 74LV4051D,118 have lower on-state resistance than CD74HC4051MT?

A: 74LV4051D,118 operates at lower voltage levels (1V to 6V single supply) and uses a different silicon process optimized for reduced on-state resistance (85Ohm). This part does not support dual supply operation (±V). Selection requires confirmation that single supply operation is acceptable for the application.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed maintain RoHS3 compliance and MSL rating of 1 (Unlimited), consistent with the original CD74HC4051MT specifications.

Q: What packaging options are available for substitutes?

A: All substitute parts are available in 16-SOIC surface mount packages with identical footprints. Packaging formats vary between Tape & Reel (TR), Cut Tape & Digi-Reel (CT), and Tube options. Packaging format selection depends on procurement and assembly requirements and does not affect electrical compatibility.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message