MAX385CSE+ Equivalent & Substitute Parts

Part Overview

The MAX385CSE+ is a 2-circuit IC switch with DPST-NO configuration and 35Ohm on-state resistance, manufactured by Analog Devices Inc./Maxim Integrated. This surface-mount component operates across single supply (3V to 15V) and dual supply (±3V to ±8V) ranges, making it suitable for signal routing and multiplexing applications in analog and mixed-signal systems. The part maintains Active product status with full RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Equivalent parts are identified when they maintain identical electrical specifications, package configuration, and performance characteristics across all critical parameters.

Key Parameters

Parameter	Value
Switch Circuit Type	DPST - NO
Multiplexer/Demultiplexer Configuration	2:1
Number of Circuits	2
On-State Resistance (Max)	35Ohm
Channel-to-Channel Matching (ΔRon)	500mOhm
Voltage - Supply, Single (V+)	3V ~ 15V
Voltage - Supply, Dual (V±)	±3V ~ ±8V
Switch Time (Ton, Toff) (Max)	175ns, 100ns
Charge Injection	2pC
Channel Capacitance (CS(off), CD(off))	12pF, 12pF
Current - Leakage (IS(off)) (Max)	200pA
Crosstalk	-90dB @ 1MHz
Operating Temperature	0°C ~ 70°C (TA)
Package / Case	16-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Equivalent parts for the MAX385CSE+ are identified based on strict parameter matching across electrical performance and mechanical specifications. The substitution criteria are:

Switch circuit configuration: DPST - NO topology
Multiplexer/demultiplexer ratio: 2:1 circuit architecture
Number of independent circuits: 2
On-state resistance: 35Ohm maximum
Channel-to-channel matching: 500mOhm tolerance
Supply voltage ranges: 3V to 15V (single) and ±3V to ±8V (dual)
Switching performance: 175ns maximum turn-on, 100ns maximum turn-off
Charge injection: 2pC specification
Channel capacitance: 12pF off-state capacitance on both switch and drain
Leakage current: 200pA maximum
Crosstalk isolation: -90dB @ 1MHz
Operating temperature range: 0°C to 70°C
Package: 16-SOIC surface-mount form factor
Compliance: RoHS3 and REACH unaffected status

Parts meeting all these parameters are direct equivalents suitable for one-to-one replacement without circuit redesign or PCB layout modification.

Parameter Comparison

Parameter	MAX385CSE+ (Main Part)	MAX385CSE+ (Substitute)
Manufacturer	Analog Devices Inc./Maxim Integrated	Analog Devices Inc./Maxim Integrated
Switch Circuit	DPST - NO	DPST - NO
Multiplexer Configuration	2:1	2:1
Number of Circuits	2	2
On-State Resistance (Max)	35Ohm	35Ohm
Channel-to-Channel Matching	500mOhm	500mOhm
Supply Voltage (Single)	3V ~ 15V	3V ~ 15V
Supply Voltage (Dual)	±3V ~ ±8V	±3V ~ ±8V
Switch Time (Ton, Toff)	175ns, 100ns	175ns, 100ns
Charge Injection	2pC	2pC
Channel Capacitance	12pF, 12pF	12pF, 12pF
Leakage Current (Max)	200pA	200pA
Crosstalk	-90dB @ 1MHz	-90dB @ 1MHz
Operating Temperature	0°C ~ 70°C	0°C ~ 70°C
Package	16-SOIC	16-SOIC
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

The MAX385CSE+ maintains Active product status with full regulatory compliance including RoHS3 certification and REACH unaffected classification. The part is suitable for immediate design implementation without obsolescence risk. When selecting equivalent parts, verify that all electrical parameters match exactly as specified in the parameter comparison table. The 16-SOIC package footprint is standard across equivalent devices, ensuring PCB compatibility without layout modification. MSL 1 rating permits unlimited shelf life storage without moisture bake-out requirements, simplifying inventory management and procurement logistics.

Frequently Asked Questions (FAQ)

Q: What defines an equivalent part for the MAX385CSE+? A: An equivalent part must match all electrical specifications including DPST-NO switch configuration, 2:1 multiplexer ratio, 35Ohm on-state resistance, 500mOhm channel matching, supply voltage ranges (3V-15V single, ±3V-±8V dual), switching times (175ns/100ns), charge injection (2pC), channel capacitance (12pF), leakage current (200pA), crosstalk (-90dB @ 1MHz), and operating temperature (0°C-70°C). The package must be 16-SOIC surface-mount form factor.

Q: Can the MAX385CSE+ be replaced with a different package variant? A: No. The 16-SOIC package is a critical specification for PCB compatibility. Different package types require circuit board redesign and layout modification. Only parts in identical 16-SOIC packaging are direct substitutes.

Q: Are there any supply voltage restrictions when substituting parts? A: The substitute part must support both single supply (3V to 15V) and dual supply (±3V to ±8V) ranges. Any deviation in these voltage specifications disqualifies the part as an equivalent.

Q: What is the significance of the 500mOhm channel-to-channel matching specification? A: Channel-to-channel matching (ΔRon) ensures balanced on-state resistance between the two independent circuits. The 500mOhm tolerance is critical for applications requiring matched signal paths. Substitute parts must maintain this specification exactly.

Q: Does RoHS3 compliance affect substitution eligibility? A: Yes. The MAX385CSE+ is RoHS3 compliant. Substitute parts must maintain identical compliance status to ensure regulatory and environmental requirements are met in the final application.

Q: What is the MSL 1 rating and why does it matter? A: MSL 1 (Moisture Sensitivity Level 1) indicates unlimited shelf life without moisture exposure concerns. This simplifies procurement and storage compared to higher MSL ratings that require controlled humidity environments and bake-out procedures before soldering.

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