MAX4051ACPE Equivalent & Substitute Parts

Part Overview

The MAX4051ACPE is an 8:1 analog multiplexer/demultiplexer IC manufactured by Analog Devices Inc./Maxim Integrated, 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 production continuity. The device functions as a single-circuit switch with low on-state resistance and minimal crosstalk, suitable for signal routing and analog switching applications.

Key Parameters

Parameter	Value
Multiplexer/Demultiplexer Circuit Configuration	8:1
Number of Circuits	1
On-State Resistance (Max)	100Ohm
Channel-to-Channel Matching (ΔRon)	6Ohm (Max)
Voltage - Supply, Single (V+)	2V ~ 16V
Voltage - Supply, Dual (V±)	±2.7V ~ 8V
Switch Time (Ton, Toff) (Max)	175ns, 150ns
Charge Injection	2pC
Channel Capacitance (CS(off), CD(off))	2pF, 2pF
Current - Leakage (IS(off)) (Max)	100pA
Crosstalk	-90dB @ 100kHz
Operating Temperature	0°C ~ 70°C (TA)
Package / Case	16-DIP (0.300", 7.62mm)
RoHS Status	RoHS non-compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility for the MAX4051ACPE is determined by the following criteria:

Primary Substitution Parameters:

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

Secondary Compatibility Parameters:

On-state resistance within acceptable range for application
Supply voltage compatibility with system design
Operating temperature range coverage
Leakage current and crosstalk performance

Substitute parts must maintain the 8:1 multiplexer configuration and 16-DIP package footprint. Variations in on-state resistance, supply voltage ranges, and operating temperature are acceptable provided they meet or exceed application requirements.

Parameter Comparison

Parameter	MAX4051ACPE	MAX4051ACPE+	CD74HC4051E	TC74HC4051APF
Manufacturer	Analog Devices Inc./Maxim Integrated	Analog Devices Inc./Maxim Integrated	Texas Instruments	Toshiba Semiconductor and Storage
Multiplexer/Demultiplexer Circuit	8:1	8:1	8:1	8:1
Number of Circuits	1	1	1	1
On-State Resistance (Max)	100Ohm	100Ohm	130Ohm	100Ohm
Channel-to-Channel Matching (ΔRon)	6Ohm (Max)	6Ohm (Max)	8.5Ohm	5Ohm
Voltage - Supply, Single (V+)	2V ~ 16V	2V ~ 16V	2V ~ 6V	2V ~ 6V
Voltage - Supply, Dual (V±)	±2.7V ~ 8V	±2.7V ~ 8V	±1V ~ 5V	±2V ~ 6V
Switch Time (Ton, Toff) (Max)	175ns, 150ns	175ns, 150ns	Not specified	18ns, 29ns (Typ)
Charge Injection	2pC	2pC	Not specified	Not specified
Channel Capacitance (CS(off), CD(off))	2pF, 2pF	2pF, 2pF	25pF	2pF, 70pF
Current - Leakage (IS(off)) (Max)	100pA	100pA	400nA	100nA
Operating Temperature	0°C ~ 70°C (TA)	0°C ~ 70°C (TA)	-55°C ~ 125°C (TA)	-40°C ~ 85°C (TA)
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)
Product Status	Obsolete	Active	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

MAX4051ACPE+ (Direct Manufacturer Upgrade) This part is the active production equivalent from the same manufacturer. It maintains identical electrical specifications to the original MAX4051ACPE while offering ROHS3 compliance and active product status. Selection of this part eliminates obsolescence risk and ensures long-term supply availability. Recommended for designs requiring no electrical parameter changes.

CD74HC4051E (Texas Instruments Alternative) This substitute provides 8:1 multiplexer functionality in the same 16-DIP package with extended operating temperature range (-55°C ~ 125°C). On-state resistance is 130Ohm (30Ohm higher than the original), and leakage current is 400nA (significantly higher than 100pA). This part is suitable for applications where higher on-state resistance and leakage current are acceptable. ROHS3 compliance and active status are confirmed.

TC74HC4051APF (Toshiba Alternative) This substitute maintains the 100Ohm on-state resistance specification and offers superior switch time performance (18ns, 29ns typical versus 175ns, 150ns maximum). Operating temperature range extends to -40°C ~ 85°C. Channel-to-channel matching is 5Ohm, superior to the original 6Ohm specification. This part is suitable for applications requiring faster switching performance. ROHS3 compliance and active status are confirmed.

All substitute parts are available in active production status with ROHS3 compliance, addressing the obsolescence and regulatory concerns of the original MAX4051ACPE.

Frequently Asked Questions (FAQ)

Q: Can MAX4051ACPE+ be used as a direct replacement for MAX4051ACPE? A: Yes. The MAX4051ACPE+ maintains identical electrical specifications and package configuration. The primary difference is product status (active versus obsolete) and RoHS compliance (ROHS3 versus non-compliant). Pin-for-pin compatibility is confirmed.

Q: What are the key differences between CD74HC4051E and the original MAX4051ACPE? A: The CD74HC4051E has higher on-state resistance (130Ohm versus 100Ohm) and significantly higher leakage current (400nA versus 100pA). Supply voltage range is narrower (2V ~ 6V single supply versus 2V ~ 16V). Operating temperature range is extended (-55°C ~ 125°C). These differences must be evaluated against application requirements before selection.

Q: Is TC74HC4051APF suitable for high-speed switching applications? A: The TC74HC4051APF offers faster switch times (18ns, 29ns typical) compared to the MAX4051ACPE (175ns, 150ns maximum). This makes it suitable for applications requiring faster signal routing. On-state resistance remains at 100Ohm, matching the original specification.

Q: Are all substitute parts available in 16-DIP package? A: Yes. All substitute parts listed are available in 16-DIP (0.300", 7.62mm) through-hole package, ensuring mechanical compatibility with existing PCB designs.

Q: What is the impact of higher leakage current in CD74HC4051E? A: The CD74HC4051E leakage current of 400nA is approximately 4000 times higher than the MAX4051ACPE specification of 100pA. Applications sensitive to leakage current (precision analog circuits, high-impedance signal paths) should evaluate this parameter against system requirements.

Q: Do all substitute parts meet RoHS requirements? A: Yes. MAX4051ACPE+ and CD74HC4051E are ROHS3 compliant. TC74HC4051APF is also ROHS3 compliant. The original MAX4051ACPE is RoHS non-compliant, making substitution necessary for RoHS-regulated applications.

Q: What supply voltage range should be considered when selecting a substitute? A: The original MAX4051ACPE supports 2V ~ 16V single supply. CD74HC4051E and TC74HC4051APF both support narrower ranges (2V ~ 6V). Verify system supply voltage compatibility before selection. MAX4051ACPE+ maintains the original 2V ~ 16V range.

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