MAX306CWI 16:1 Analog Multiplexer IC Equivalent & Substitute Parts

Part Overview

The MAX306CWI is a 16:1 analog multiplexer IC manufactured by Analog Devices Inc./Maxim Integrated, designed for signal routing and switching applications in interface circuits. This component features a 100Ohm on-state resistance and operates across a wide supply voltage range (5V to 30V single supply, or ±4.5V to ±20V dual supply). The part is currently classified as obsolete, making equivalent and substitute parts necessary for ongoing production and maintenance applications. The 28-SOIC surface mount package provides compact integration for modern PCB designs.

Key Parameters

Parameter	Value
Multiplexer Configuration	16:1
Number of Circuits	1
On-State Resistance (Max)	100Ohm
Channel-to-Channel Matching (ΔRon)	1.5Ohm
Voltage - Supply, Single (V+)	5V ~ 30V
Voltage - Supply, Dual (V±)	±4.5V ~ 20V
Switch Time (Ton, Toff) (Max)	200ns, 150ns
Charge Injection	2pC
Channel Capacitance (CS(off), CD(off))	8pF, 130pF
Current - Leakage (IS(off)) (Max)	500pA
Crosstalk	-92dB @ 100kHz
Operating Temperature	0°C ~ 70°C
Package / Case	28-SOIC (0.295", 7.50mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution for the MAX306CWI is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Multiplexer configuration: 16:1
Package type: 28-SOIC surface mount
On-state resistance compatibility
Supply voltage range compatibility
Switch timing specifications

Grouping Logic:

The substitute parts are organized into three functional categories based on on-state resistance and supply voltage characteristics:

Direct Electrical Equivalents (100Ohm On-State Resistance): MAX306CWI+ maintains identical electrical specifications to the main part, with the primary difference being active product status and improved RoHS compliance.
Manufacturer-Recommended Alternatives (100Ohm On-State Resistance, Extended Temperature Range): DG406DYZ and DG406DYZ-T from Renesas Electronics provide equivalent on-state resistance with extended operating temperature range (-40°C to 85°C) and improved RoHS3 compliance. These parts accommodate wider thermal environments while maintaining core switching performance.
Alternative Resistance Profiles: DG506BEW-T1-GE3 (300Ohm) and MPC506AU/MPC506AU/1K (1.5kOhm) represent higher on-state resistance options suitable for applications where increased resistance is acceptable or beneficial for noise reduction and power consumption optimization.

Parameter Comparison

Parameter	MAX306CWI	MAX306CWI+	DG406DYZ	DG406DYZ-T	DG506BEW-T1-GE3	MPC506AU	MPC506AU/1K
Manufacturer	Analog Devices/Maxim	Analog Devices/Maxim	Renesas Electronics	Renesas Electronics	Vishay Siliconix	Texas Instruments	Texas Instruments
Multiplexer Configuration	16:1	16:1	16:1	16:1	16:1	16:1	16:1
On-State Resistance (Max)	100Ohm	100Ohm	100Ohm	100Ohm	300Ohm	1.5kOhm	1.5kOhm
Channel-to-Channel Matching (ΔRon)	1.5Ohm	1.5Ohm	5Ohm	5Ohm	10Ohm	—	—
Voltage - Supply, Single (V+)	5V ~ 30V	5V ~ 30V	5V ~ 34V	5V ~ 34V	12V ~ 44V	—	—
Voltage - Supply, Dual (V±)	±4.5V ~ 20V	±4.5V ~ 20V	±5V ~ 20V	±5V ~ 20V	±5V ~ 20V	±5V ~ 22V	±5V ~ 22V
Switch Time (Ton, Toff) (Max)	200ns, 150ns	200ns, 150ns	200ns, 150ns	200ns, 150ns	250ns, 200ns	200ns, 250ns (Typ)	200ns, 250ns (Typ)
Charge Injection	2pC	2pC	40pC	40pC	1pC	—	—
Channel Capacitance (CS(off), CD(off))	8pF, 130pF	8pF, 130pF	8pF, 160pF	8pF, 160pF	3pF, 13pF	5pF, 50pF	5pF, 50pF
Current - Leakage (IS(off)) (Max)	500pA	500pA	500pA	500pA	1nA	500pA (Typ)	500pA (Typ)
Operating Temperature	0°C ~ 70°C	0°C ~ 70°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 125°C	-40°C ~ 85°C	-40°C ~ 85°C
Package / Case	28-SOIC	28-SOIC	28-SOIC	28-SOIC	28-SOIC	28-SOIC	28-SOIC
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

For Direct Replacement (Identical Electrical Performance):

MAX306CWI+ is the primary substitute when electrical specifications must remain unchanged. This part maintains 100Ohm on-state resistance, 1.5Ohm channel matching, and identical switching characteristics. The transition from obsolete to active product status ensures long-term availability. ROHS3 compliance provides regulatory alignment for new designs and manufacturing environments.

For Extended Temperature Range Applications:

DG406DYZ and DG406DYZ-T from Renesas Electronics provide equivalent 100Ohm on-state resistance with extended operating temperature range (-40°C to 85°C versus 0°C to 70°C). These parts are suitable for industrial and automotive environments requiring broader thermal performance. DG406DYZ-T offers tape and reel packaging for high-volume production. Channel matching tolerance increases to 5Ohm, which remains acceptable for most multiplexing applications.

For High-Temperature or Precision Applications:

DG506BEW-T1-GE3 from Vishay Siliconix extends operating temperature to -40°C to 125°C and provides superior charge injection (1pC) and lower channel capacitance. The 300Ohm on-state resistance requires circuit redesign but offers improved noise immunity and reduced power dissipation in high-impedance signal paths.

For Low-Power or High-Impedance Signal Routing:

MPC506AU and MPC506AU/1K from Texas Instruments feature 1.5kOhm on-state resistance, suitable for applications where signal source impedance is high or power consumption must be minimized. These parts operate across ±5V to ±22V dual supply range and maintain -40°C to 85°C temperature range. MPC506AU/1K provides tape and reel packaging for automated assembly.

Frequently Asked Questions (FAQ)

Q: Can MAX306CWI+ be used as a direct drop-in replacement for MAX306CWI?

A: Yes. MAX306CWI+ maintains identical electrical specifications including 100Ohm on-state resistance, 1.5Ohm channel matching, and switching times. The primary differences are active product status and ROHS3 compliance. Pin configuration and package dimensions (28-SOIC) are identical.

Q: What is the impact of using DG406DYZ instead of MAX306CWI?

A: DG406DYZ provides equivalent 100Ohm on-state resistance and switching performance. Key differences include extended operating temperature range (-40°C to 85°C), increased channel matching tolerance (5Ohm versus 1.5Ohm), and higher charge injection (40pC versus 2pC). These differences are acceptable in most applications but may affect precision analog signal routing at high frequencies.

Q: When should DG506BEW-T1-GE3 be selected over 100Ohm alternatives?

A: DG506BEW-T1-GE3 is selected when operating temperature must extend to 125°C, when charge injection must be minimized (1pC), or when lower channel capacitance is required for high-frequency applications. The 300Ohm on-state resistance requires circuit analysis to confirm compatibility with signal source impedance and load conditions.

Q: Are MPC506AU and MPC506AU/1K suitable for direct replacement?

A: MPC506AU and MPC506AU/1K are not direct replacements due to 1.5kOhm on-state resistance versus 100Ohm. These parts are selected only when high-impedance signal routing is required or when power consumption must be minimized. Circuit redesign and signal integrity analysis are necessary before substitution.

Q: What packaging options are available for high-volume production?

A: MAX306CWI+ is available in tube packaging. DG406DYZ-T and MPC506AU/1K are supplied in tape and reel format suitable for automated pick-and-place assembly. DG406DYZ and MPC506AU are available in tube packaging. All parts maintain identical 28-SOIC package dimensions.

Q: Do all substitute parts meet RoHS3 compliance?

A: All substitute parts listed (MAX306CWI+, DG406DYZ, DG406DYZ-T, DG506BEW-T1-GE3, MPC506AU, MPC506AU/1K) are ROHS3 compliant. The original MAX306CWI is RoHS non-compliant. Compliance status should be verified during design phase for applications subject to environmental regulations.

Q: What is the difference between DG406DYZ and DG406DYZ-T?

A: Both parts are electrically identical with 100Ohm on-state resistance and -40°C to 85°C operating range. The primary difference is packaging: DG406DYZ is supplied in tube format, while DG406DYZ-T is supplied in cut tape and Digi-Reel format for automated assembly. DG406DYZ-T offers higher inventory availability (16,470 pcs versus 2,039 pcs).

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