MAX4518CSD Equivalent & Substitute Parts

Part Overview

The MAX4518CSD is a single-circuit SP4T (Single Pole, 4-Throw) analog switch IC manufactured by Analog Devices Inc./Maxim Integrated. This component functions as a 4:1 multiplexer/demultiplexer with 100Ohm on-state resistance, designed for signal routing and switching applications in analog circuits. The MAX4518CSD is classified as obsolete, making identification of active equivalent parts essential for new designs and ongoing production support.

Key Parameters

Parameter	Value
Switch Circuit Configuration	SP4T (Single Pole, 4-Throw)
Multiplexer/Demultiplexer Circuit	4:1
Number of Circuits	1
On-State Resistance (Max)	100Ohm
Channel-to-Channel Matching (ΔRon)	4Ohm (Max)
Voltage - Supply, Single (V+)	2V ~ 15V
Voltage - Supply, Dual (V±)	±2.7V ~ 8V
Switch Time (Ton, Toff) (Max)	150ns, 150ns
Charge Injection (Max)	5pC
Channel Capacitance (CS(off), CD(off))	5pF, 16pF
Current - Leakage (IS(off)) (Max)	100pA
Crosstalk	-92dB @ 100kHz
Operating Temperature	0°C ~ 70°C (TA)
Package / Case	14-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount

Substitute Part Grouping Explanation

Substitution eligibility for the MAX4518CSD is determined by strict equivalence across the following critical parameters:

Switch circuit topology: SP4T configuration
Multiplexer function: 4:1 circuit
On-state resistance: 100Ohm maximum
Channel-to-channel matching: 4Ohm maximum
Supply voltage ranges: 2V ~ 15V (single) and ±2.7V ~ 8V (dual)
Switching performance: 150ns maximum for both Ton and Toff
Electrical characteristics: Charge injection, capacitance, leakage current, and crosstalk specifications
Package format: 14-SOIC surface mount
Operating temperature range: 0°C ~ 70°C

The MAX4518CSD+ meets all these criteria and is classified as an active product, making it a direct functional equivalent suitable for replacement in new designs and production applications.

Parameter Comparison

Parameter	MAX4518CSD (Main Part)	MAX4518CSD+ (Substitute)
Manufacturer	Analog Devices Inc./Maxim Integrated	Analog Devices Inc./Maxim Integrated
Product Status	Obsolete	Active
Switch Circuit	SP4T	SP4T
Multiplexer/Demultiplexer Circuit	4:1	4:1
Number of Circuits	1	1
On-State Resistance (Max)	100Ohm	100Ohm
Channel-to-Channel Matching (ΔRon)	4Ohm (Max)	4Ohm (Max)
Voltage - Supply, Single (V+)	2V ~ 15V	2V ~ 15V
Voltage - Supply, Dual (V±)	±2.7V ~ 8V	±2.7V ~ 8V
Switch Time (Ton, Toff) (Max)	150ns, 150ns	150ns, 150ns
Charge Injection (Max)	5pC	5pC
Channel Capacitance (CS(off), CD(off))	5pF, 16pF	5pF, 16pF
Current - Leakage (IS(off)) (Max)	100pA	100pA
Crosstalk	-92dB @ 100kHz	-92dB @ 100kHz
Operating Temperature	0°C ~ 70°C (TA)	0°C ~ 70°C (TA)
Package / Case	14-SOIC (0.154", 3.90mm Width)	14-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount	Surface Mount
RoHS Status	RoHS non-compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

The MAX4518CSD+ is the direct equivalent for the obsolete MAX4518CSD. Both parts share identical electrical specifications, switching characteristics, and package format. The primary distinction is product status and regulatory compliance: the MAX4518CSD+ is an active product with ROHS3 compliance, whereas the original MAX4518CSD is obsolete and RoHS non-compliant.

For new designs and production applications, the MAX4518CSD+ is the appropriate selection. The active product status ensures ongoing availability and manufacturer support. The ROHS3 compliance of the MAX4518CSD+ aligns with current environmental and regulatory requirements for electronic components in most markets.

Both parts maintain identical electrical performance across all specified parameters, ensuring functional interchangeability in circuit applications without design modification.

Frequently Asked Questions (FAQ)

Q: Can the MAX4518CSD+ directly replace the MAX4518CSD in existing designs?

A: Yes. The MAX4518CSD+ is electrically and mechanically identical to the MAX4518CSD. Both parts feature the same SP4T switch configuration, 100Ohm on-state resistance, supply voltage ranges, switching times, and 14-SOIC package format. Direct substitution is possible without circuit modification.

Q: What is the primary reason to transition from MAX4518CSD to MAX4518CSD+?

A: The MAX4518CSD is classified as obsolete, creating supply and support risks. The MAX4518CSD+ is an active product with guaranteed availability. Additionally, the MAX4518CSD+ meets ROHS3 compliance requirements, whereas the original part does not.

Q: Are there any differences in electrical performance between these parts?

A: No. Both parts deliver identical electrical specifications: 100Ohm on-state resistance, 4Ohm maximum channel-to-channel matching, 150ns switching times, 5pC charge injection, and -92dB crosstalk at 100kHz.

Q: Is the package format identical for both parts?

A: Yes. Both the MAX4518CSD and MAX4518CSD+ use the 14-SOIC surface mount package with 0.154" (3.90mm) width. PCB footprints and assembly processes remain unchanged.

Q: What is the difference in packaging between these parts?

A: The MAX4518CSD is supplied in standard packaging, while the MAX4518CSD+ is supplied in tube packaging. This difference does not affect component functionality or electrical performance.

Q: Are both parts suitable for the same operating temperature range?

A: Yes. Both parts operate across the identical temperature range of 0°C to 70°C (TA).

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