MAX397EWI Equivalent & Substitute Parts

Part Overview

The MAX397EWI is a dual 8:1 analog multiplexer/demultiplexer IC manufactured by Analog Devices Inc./Maxim Integrated. This interface component features two independent 8:1 switch circuits with 100Ohm on-state resistance, designed for signal routing and switching applications in analog systems. The device is classified as obsolete, which necessitates identification of functionally equivalent alternatives for new designs and ongoing production requirements.

Key Parameters

Parameter	Value
Multiplexer/Demultiplexer Circuit Configuration	8:1
Number of Circuits	2
On-State Resistance (Max)	100Ohm
Channel-to-Channel Matching (ΔRon)	1.8Ohm
Voltage - Supply, Single (V+)	2.7V ~ 16V
Voltage - Supply, Dual (V±)	±2.7V ~ 8V
Switch Time (Ton, Toff) (Max)	150ns, 150ns
Charge Injection	2pC
Channel Capacitance (CS(off), CD(off))	11pF, 80pF
Current - Leakage (IS(off)) (Max)	100pA
Crosstalk	-92dB @ 100kHz
Operating Temperature	-40°C ~ 85°C (TA)
Package / Case	28-SOIC (0.295", 7.50mm Width)
Mounting Type	Surface Mount

Substitute Part Grouping Explanation

Substitution eligibility for the MAX397EWI is determined by strict equivalence across the following critical parameters:

Multiplexer circuit configuration: 8:1 topology with 2 independent circuits
On-state resistance: 100Ohm maximum
Channel-to-channel matching: 1.8Ohm maximum
Supply voltage ranges: Single supply 2.7V ~ 16V and dual supply ±2.7V ~ 8V
Switching performance: 150ns maximum for both Ton and Toff
Charge injection: 2pC
Channel capacitance specifications: 11pF (CS(off)) and 80pF (CD(off))
Leakage current: 100pA maximum
Crosstalk performance: -92dB @ 100kHz
Package: 28-SOIC surface mount form factor
Operating temperature range: -40°C ~ 85°C

Only parts meeting all these electrical and mechanical specifications are classified as direct substitutes.

Parameter Comparison

Parameter	MAX397EWI (Main Part)	MAX397EWI+ (Substitute)
Manufacturer	Analog Devices Inc./Maxim Integrated	Analog Devices Inc./Maxim Integrated
Category	Interface	Interface
Multiplexer/Demultiplexer Circuit	8:1	8:1
Number of Circuits	2	2
On-State Resistance (Max)	100Ohm	100Ohm
Channel-to-Channel Matching (ΔRon)	1.8Ohm	1.8Ohm
Voltage - Supply, Single (V+)	2.7V ~ 16V	2.7V ~ 16V
Voltage - Supply, Dual (V±)	±2.7V ~ 8V	±2.7V ~ 8V
Switch Time (Ton, Toff) (Max)	150ns, 150ns	150ns, 150ns
Charge Injection	2pC	2pC
Channel Capacitance (CS(off), CD(off))	11pF, 80pF	11pF, 80pF
Current - Leakage (IS(off)) (Max)	100pA	100pA
Crosstalk	-92dB @ 100kHz	-92dB @ 100kHz
Operating Temperature	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)
Package / Case	28-SOIC (0.295", 7.50mm Width)	28-SOIC (0.295", 7.50mm Width)
Mounting Type	Surface Mount	Surface Mount
Product Status	Obsolete	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant
Packaging	Not specified	Tube

Engineering Selection Recommendations

The MAX397EWI+ is a direct electrical and mechanical equivalent to the MAX397EWI. Both parts share identical functional specifications across all critical switching, timing, and signal integrity parameters. The primary distinction between these parts is product lifecycle status and regulatory compliance.

The MAX397EWI is classified as obsolete, indicating discontinued manufacturing and limited availability. The MAX397EWI+ maintains active product status with current manufacturing support. Additionally, the MAX397EWI+ achieves ROHS3 compliance, whereas the original MAX397EWI is RoHS non-compliant. For applications requiring regulatory compliance with modern environmental standards, the MAX397EWI+ is the appropriate selection. Both parts are supplied in 28-SOIC surface mount packaging with identical pinout and electrical performance characteristics.

Frequently Asked Questions (FAQ)

Q: Can MAX397EWI+ be used as a direct replacement for MAX397EWI in existing designs?

A: Yes. The MAX397EWI+ is electrically and mechanically identical to the MAX397EWI across all specified parameters. No circuit modifications are required for substitution. Both parts feature identical 8:1 multiplexer configuration, 100Ohm on-state resistance, supply voltage ranges, switching times, and 28-SOIC package geometry.

Q: What is the primary reason to transition from MAX397EWI to MAX397EWI+?

A: The MAX397EWI is obsolete with limited inventory availability. The MAX397EWI+ is an active product with ongoing manufacturing support. Additionally, the MAX397EWI+ meets ROHS3 environmental compliance requirements, whereas the original part does not.

Q: Are there any differences in pin configuration or package dimensions between these parts?

A: No. Both the MAX397EWI and MAX397EWI+ use identical 28-SOIC surface mount packaging with 0.295" (7.50mm) width. Pin assignments and electrical connections are identical.

Q: What are the key electrical parameters that define substitution eligibility for this multiplexer IC?

A: Substitution is based on matching the 8:1 dual-circuit configuration, 100Ohm on-state resistance, 1.8Ohm channel matching, dual supply voltage ranges (2.7V ~ 16V single, ±2.7V ~ 8V dual), 150ns switching times, 2pC charge injection, specified channel capacitance values, 100pA leakage current, and -92dB crosstalk performance at 100kHz.

Q: Is the packaging format different between MAX397EWI and MAX397EWI+?

A: The electrical package (28-SOIC) is identical. The MAX397EWI+ is supplied in Tube packaging format, while the original MAX397EWI packaging format is not specified in available documentation.

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