MAX388CWG+ Equivalent & Substitute Parts Reference

Part Overview

The MAX388CWG+ is an 8:1 analog multiplexer/demultiplexer integrated circuit manufactured by Analog Devices Inc./Maxim Integrated. This component features a single circuit configuration with 3kOhm on-state resistance and operates across a dual supply voltage range of ±4.5V to ±18V. The device is housed in a 24-SOIC surface mount package and is classified as obsolete product status. Due to its obsolete classification, identifying equivalent substitute parts is essential for system redesign, board revision, or inventory replenishment in production environments.

Key Parameters

Parameter	Value
Multiplexer/Demultiplexer Circuit Configuration	8:1
Number of Circuits	1
On-State Resistance (Max)	3kOhm
Channel-to-Channel Matching (ΔRon)	300Ohm
Voltage - Supply, Dual (V±)	±4.5V ~ 18V
Switch Time (Ton, Toff) (Max)	1.5µs, 1µs
Charge Injection	55pC
Channel Capacitance (CS(off), CD(off))	5pF, 25pF
Current - Leakage (IS(off)) (Max)	500pA
Operating Temperature	0°C ~ 70°C (TA)
Mounting Type	Surface Mount
Package / Case	24-SOIC (0.295", 7.50mm Width)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the MAX388CWG+ is determined by strict equivalence across the following critical parameters:

Circuit Configuration: 8:1 multiplexer/demultiplexer with single circuit topology
On-State Resistance: Maximum 3kOhm with channel-to-channel matching of 300Ohm
Supply Voltage Range: Dual supply operation at ±4.5V ~ 18V
Switching Performance: Maximum switch times of 1.5µs (Ton) and 1µs (Toff)
Charge Injection and Capacitance: 55pC charge injection with specified channel capacitance values
Leakage Current: Maximum 500pA off-state leakage
Package Compatibility: 24-SOIC surface mount package with identical physical dimensions
Operating Temperature Range: 0°C ~ 70°C
Compliance Standards: ROHS3 compliance and MSL Level 1 rating

Only components meeting all specified parameters across these categories qualify as direct substitutes.

Parameter Comparison

Parameter	MAX388CWG+ (Main Part)	MAX388CWG+ (Direct Substitute)
Manufacturer	Analog Devices Inc./Maxim Integrated	Analog Devices Inc./Maxim Integrated
Multiplexer/Demultiplexer Circuit	8:1	8:1
Number of Circuits	1	1
On-State Resistance (Max)	3kOhm	3kOhm
Channel-to-Channel Matching (ΔRon)	300Ohm	300Ohm
Voltage - Supply, Dual (V±)	±4.5V ~ 18V	±4.5V ~ 18V
Switch Time (Ton, Toff) (Max)	1.5µs, 1µs	1.5µs, 1µs
Charge Injection	55pC	55pC
Channel Capacitance (CS(off), CD(off))	5pF, 25pF	5pF, 25pF
Current - Leakage (IS(off)) (Max)	500pA	500pA
Operating Temperature	0°C ~ 70°C (TA)	0°C ~ 70°C (TA)
Package / Case	24-SOIC (0.295", 7.50mm Width)	24-SOIC (0.295", 7.50mm Width)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

The MAX388CWG+ is classified as obsolete product status. When sourcing replacement inventory or redesigning systems, component selection must prioritize ROHS3 compliance and MSL Level 1 rating to ensure regulatory adherence and manufacturing reliability. The 24-SOIC package footprint is a fixed requirement for direct board-level substitution without layout modifications. Dual supply voltage operation at ±4.5V ~ 18V must be verified against system power architecture to confirm compatibility. The specified electrical parameters—including 3kOhm on-state resistance, 55pC charge injection, and 500pA maximum leakage current—define the functional performance envelope and must be matched exactly in substitute selection.

Frequently Asked Questions (FAQ)

Q: What makes a part a direct substitute for the MAX388CWG+?

A: A direct substitute must match all electrical and mechanical specifications: 8:1 multiplexer configuration, 3kOhm on-state resistance, ±4.5V ~ 18V dual supply operation, 24-SOIC package, and all switching and leakage parameters. Deviations in any parameter disqualify a component from direct substitution.

Q: Can the MAX388CWG+ be replaced with a different package type?

A: No. The 24-SOIC (0.295", 7.50mm Width) package is a fixed requirement for direct substitution. Alternative package types would require PCB redesign and are not considered equivalent substitutes.

Q: Is ROHS3 compliance mandatory for substitute selection?

A: Yes. ROHS3 compliance is a regulatory requirement for this component category. All substitute parts must maintain ROHS3 compliance status to meet environmental and manufacturing standards.

Q: What is the significance of MSL Level 1 rating?

A: MSL Level 1 indicates unlimited shelf life without moisture baking requirements. This classification simplifies inventory management and reduces handling constraints compared to higher MSL levels.

Q: Are there performance differences between the main part and its direct substitute?

A: No. Direct substitutes are electrically and mechanically identical. All specified parameters—including on-state resistance, switching times, charge injection, and leakage current—are equivalent.

Q: What supply voltage range must be supported?

A: The component operates on dual supply voltages ranging from ±4.5V to ±18V. System power architecture must fall within this range for proper operation.

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