MAX4051EEE Equivalent & Substitute Parts

Part Overview

The MAX4051EEE is an 8:1 analog multiplexer/demultiplexer IC manufactured by Analog Devices Inc./Maxim Integrated, designed for signal routing and switching applications in interface circuits. This part features a single 8:1 switch configuration with 100Ohm on-state resistance and operates across a wide supply voltage range. The MAX4051EEE is currently classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing production, maintenance, and new design implementations.

Key Parameters

Parameter	Value
Multiplexer/Demultiplexer Configuration	8:1
Number of Circuits	1
On-State Resistance (Max)	100Ohm
Channel-to-Channel Matching (ΔRon)	12Ohm (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)	1nA
Crosstalk	-90dB @ 100kHz
Operating Temperature	-40°C ~ 85°C (TA)
Package / Case	16-SSOP (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility for the MAX4051EEE is determined by the following critical parameters:

Primary Substitution Criteria:

Multiplexer/Demultiplexer configuration: 8:1 (mandatory)
Number of circuits: 1 (mandatory)
On-state resistance: Maximum 100Ohm (preferred) or within acceptable tolerance for application
Supply voltage compatibility: Single supply 2V ~ 16V or dual supply ±2.7V ~ 8V (mandatory)
Operating temperature range: -40°C ~ 85°C (mandatory)
Package type: 16-pin surface mount (16-SSOP or 16-LSSOP) (mandatory)

Secondary Compatibility Parameters:

Switch time performance (Ton, Toff)
Charge injection and channel capacitance characteristics
Leakage current specifications
Crosstalk performance

Substitutes are grouped based on exact functional equivalence in core switching parameters and package compatibility. Variations in secondary parameters (such as on-state resistance tolerance or leakage current) are acceptable when the application requirements permit.

Parameter Comparison

Parameter	MAX4051EEE (Main)	MAX4051EEE+ (Direct)	BU4051BCFV-E2 (Alternative)
Manufacturer	Analog Devices Inc./Maxim Integrated	Analog Devices Inc./Maxim Integrated	Rohm Semiconductor
Multiplexer Configuration	8:1	8:1	8:1
Number of Circuits	1	1	1
On-State Resistance (Max)	100Ohm	100Ohm	160Ohm
Channel-to-Channel Matching (ΔRon)	12Ohm (Max)	12Ohm (Max)	Not specified
Voltage - Supply, Single (V+)	2V ~ 16V	2V ~ 16V	3V ~ 18V
Voltage - Supply, Dual (V±)	±2.7V ~ 8V	±2.7V ~ 8V	Not specified
Switch Time (Ton, Toff) (Max)	175ns, 150ns	175ns, 150ns	Not specified
Charge Injection	2pC	2pC	Not specified
Channel Capacitance (CS(off), CD(off))	2pF, 2pF	2pF, 2pF	10pF
Current - Leakage (IS(off)) (Max)	1nA	1nA	300nA
Crosstalk	-90dB @ 100kHz	-90dB @ 100kHz	Not specified
Operating Temperature	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)
Package / Case	16-SSOP (0.154", 3.90mm Width)	16-SSOP (0.154", 3.90mm Width)	16-LSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Product Status	Obsolete	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

MAX4051EEE+ (Direct Substitute - Recommended Primary Choice)

The MAX4051EEE+ is the direct functional equivalent of the MAX4051EEE, manufactured by the same supplier (Analog Devices Inc./Maxim Integrated). This part maintains identical electrical specifications including 100Ohm on-state resistance, 12Ohm channel-to-channel matching, and all switching performance parameters. The MAX4051EEE+ is currently in active production status, ensuring long-term availability and supply chain stability. The primary distinction is packaging format (Tube versus unspecified for the original), and RoHS3 compliance status. For applications requiring exact electrical performance matching and regulatory compliance, the MAX4051EEE+ is the preferred substitute.

BU4051BCFV-E2 (Alternative Substitute - Conditional Use)

The BU4051BCFV-E2, manufactured by Rohm Semiconductor, provides functional 8:1 multiplexer capability with the same circuit configuration and operating temperature range. This part is suitable for applications where the higher on-state resistance (160Ohm maximum versus 100Ohm) and increased leakage current (300nA versus 1nA) are acceptable. The BU4051BCFV-E2 operates across a wider single supply voltage range (3V ~ 18V) and is available in active production status with RoHS3 compliance. Package dimensions differ slightly (16-LSSOP, 0.173" width versus 16-SSOP, 0.154" width), requiring PCB layout verification. This substitute is appropriate for applications with relaxed performance requirements or where the extended supply voltage range provides system-level advantages.

Frequently Asked Questions (FAQ)

Q: Can MAX4051EEE+ be used as a direct replacement for MAX4051EEE?

A: Yes. The MAX4051EEE+ is electrically identical to the MAX4051EEE across all specified parameters including on-state resistance, switching time, charge injection, and operating temperature range. The primary difference is product status (Active versus Obsolete) and RoHS compliance certification. No circuit modifications are required for substitution.

Q: What are the key differences between MAX4051EEE+ and BU4051BCFV-E2?

A: The primary differences are on-state resistance (100Ohm versus 160Ohm), leakage current (1nA versus 300nA), channel capacitance (2pF versus 10pF), and package dimensions (16-SSOP 0.154" versus 16-LSSOP 0.173" width). Both maintain 8:1 multiplexer configuration and -40°C ~ 85°C operating temperature. The BU4051BCFV-E2 supports a wider single supply voltage range (3V ~ 18V versus 2V ~ 16V).

Q: Is the BU4051BCFV-E2 suitable for high-speed signal switching applications?

A: The BU4051BCFV-E2 does not specify switch time (Ton, Toff) parameters. Applications requiring guaranteed switching performance specifications (175ns Ton, 150ns Toff) should use MAX4051EEE+ to ensure performance compliance.

Q: Will the BU4051BCFV-E2 fit in the same PCB footprint as MAX4051EEE?

A: No. The BU4051BCFV-E2 uses a 16-LSSOP package (0.173" width) while MAX4051EEE uses 16-SSOP (0.154" width). PCB layout modifications are required. Pin configuration compatibility must be verified against specific application schematics.

Q: Are both substitute parts RoHS compliant?

A: Yes. Both MAX4051EEE+ and BU4051BCFV-E2 are ROHS3 compliant. The original MAX4051EEE is RoHS non-compliant. For applications requiring RoHS certification, either substitute is acceptable.

Q: What is the leakage current impact of using BU4051BCFV-E2?

A: The BU4051BCFV-E2 specifies maximum leakage current of 300nA compared to 1nA for MAX4051EEE+. This 300x increase may impact applications with strict DC accuracy requirements or low-power operation. Verify leakage current specifications against application power budget and signal integrity requirements.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message