MAX350CWN Equivalent & Substitute Parts

Part Overview

The MAX350CWN is a 2-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 per channel, housed in an 18-SOIC surface mount package. The MAX350CWN is classified as obsolete, making identification of suitable substitute parts essential for ongoing system support and new design implementations.

Key Parameters

Parameter	Value
Switch Circuit Configuration	SP4T (Single Pole, 4-Throw)
Multiplexer/Demultiplexer Circuit	4:1
Number of Circuits	2
On-State Resistance (Max)	100Ohm
Channel-to-Channel Matching (ΔRon)	16Ohm (Max)
Supply Voltage - Single (V+)	2.7V ~ 16V
Supply Voltage - Dual (V±)	±2.7V ~ 8V
Switch Time (Ton, Toff) (Max)	275ns, 150ns
Charge Injection	1pC
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	18-SOIC (0.295", 7.50mm Width)
Mounting Type	Surface Mount

Substitute Part Grouping Explanation

Substitution eligibility for the MAX350CWN is determined by strict equivalence across the following critical parameters:

Switch circuit topology: SP4T configuration with 4:1 multiplexing capability
Number of independent circuits: 2 circuits per package
On-state resistance: 100Ohm maximum
Channel-to-channel matching: 16Ohm maximum deviation
Supply voltage ranges: 2.7V ~ 16V (single supply) and ±2.7V ~ 8V (dual supply)
Switching performance: 275ns maximum turn-on time, 150ns maximum turn-off time
Charge injection: 1pC
Channel capacitance: 2pF off-state capacitance for both source and drain
Leakage current: 100pA maximum
Crosstalk performance: -90dB @ 100kHz
Operating temperature range: 0°C ~ 70°C
Package format: 18-SOIC surface mount

Only parts meeting all these specifications qualify as direct substitutes.

Parameter Comparison

Parameter	MAX350CWN (Main Part)	MAX350CWN+ (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	2	2
On-State Resistance (Max)	100Ohm	100Ohm
Channel-to-Channel Matching (ΔRon)	16Ohm (Max)	16Ohm (Max)
Supply Voltage - Single (V+)	2.7V ~ 16V	2.7V ~ 16V
Supply Voltage - Dual (V±)	±2.7V ~ 8V	±2.7V ~ 8V
Switch Time (Ton, Toff) (Max)	275ns, 150ns	275ns, 150ns
Charge Injection	1pC	1pC
Channel Capacitance (CS(off), CD(off))	2pF, 2pF	2pF, 2pF
Current - Leakage (IS(off)) (Max)	100pA	100pA
Crosstalk	-90dB @ 100kHz	-90dB @ 100kHz
Operating Temperature	0°C ~ 70°C (TA)	0°C ~ 70°C (TA)
Package / Case	18-SOIC (0.295", 7.50mm Width)	18-SOIC (0.295", 7.50mm 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 MAX350CWN+ serves as the direct functional equivalent to the obsolete MAX350CWN. Both parts maintain identical electrical and mechanical specifications across all critical parameters, ensuring pin-for-pin and functional compatibility.

The primary distinction between these parts is product status and regulatory compliance. The MAX350CWN is classified as obsolete, while the MAX350CWN+ is actively manufactured and supported. Additionally, the MAX350CWN+ achieves ROHS3 compliance, whereas the original MAX350CWN is RoHS non-compliant. Both parts maintain identical moisture sensitivity classification (MSL 1) and REACH status.

For new designs or system refreshes, the MAX350CWN+ is the appropriate selection due to its active product status and enhanced regulatory compliance. For legacy system maintenance requiring exact part matching, the MAX350CWN+ provides full electrical and mechanical substitution.

Frequently Asked Questions (FAQ)

Q: Can MAX350CWN+ be used as a direct replacement for MAX350CWN in existing designs?

A: Yes. The MAX350CWN+ is electrically and mechanically identical to the MAX350CWN across all specified parameters. Both parts feature identical SP4T switch topology, 100Ohm on-state resistance, supply voltage ranges, switching times, and 18-SOIC packaging. No circuit modifications are required.

Q: What is the significance of the product status difference between MAX350CWN and MAX350CWN+?

A: The MAX350CWN is classified as obsolete, indicating discontinued manufacturing and limited availability. The MAX350CWN+ is actively produced by Analog Devices Inc./Maxim Integrated, ensuring reliable supply and ongoing technical support.

Q: Are there packaging differences between MAX350CWN and MAX350CWN+?

A: Both parts use identical 18-SOIC surface mount packaging with 0.295" (7.50mm) width. The primary packaging distinction is that MAX350CWN+ is supplied in tube packaging, while MAX350CWN packaging format is not specified in available documentation.

Q: Does RoHS compliance affect functional performance?

A: No. RoHS compliance relates to material composition and environmental regulations, not electrical performance. Both MAX350CWN and MAX350CWN+ deliver identical functional characteristics. The MAX350CWN+ achieves ROHS3 compliance, making it suitable for applications with regulatory requirements.

Q: Are the moisture sensitivity levels identical?

A: Yes. Both MAX350CWN and MAX350CWN+ carry MSL 1 (Unlimited) classification, indicating no moisture sensitivity restrictions during storage or handling.

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