MAX351CSE-T Equivalent & Substitute Parts

Part Overview

The MAX351CSE-T is a 4-circuit SPST-NC (Single Pole Single Throw - Normally Closed) analog switch IC manufactured by Analog Devices Inc./Maxim Integrated. This component operates as a 1:1 multiplexer/demultiplexer with 35Ohm on-state resistance and is housed in a 16-SOIC surface mount package. The MAX351CSE-T is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production support. Substitute parts must maintain functional compatibility across switch circuit topology, circuit count, on-state resistance range, supply voltage requirements, and package form factor.

Key Parameters

Parameter	Value
Switch Circuit Type	SPST - NC
Number of Circuits	4
Multiplexer/Demultiplexer Configuration	1:1
On-State Resistance (Max)	35Ohm
Channel-to-Channel Matching (ΔRon)	2Ohm (Max)
Voltage - Supply, Single (V+)	10V ~ 30V
Voltage - Supply, Dual (V±)	±4.5V ~ 20V
Switch Time (Ton, Toff) (Max)	175ns, 145ns
Charge Injection	5pC
Channel Capacitance (CS(off), CD(off))	9pF, 9pF
Current - Leakage (IS(off)) (Max)	250pA
Crosstalk	-85dB @ 1MHz
Operating Temperature	0°C ~ 70°C (TA)
Package / Case	16-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution of the MAX351CSE-T is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Switch circuit topology: SPST - NC (4 circuits, 1:1 configuration)
On-state resistance: 35Ohm maximum
Package form factor: 16-SOIC surface mount
Supply voltage compatibility: Single supply 10V ~ 30V or dual supply ±4.5V ~ 20V
Switching performance: Ton/Toff specifications of 175ns/145ns maximum
Leakage current: 250pA maximum
Crosstalk performance: -85dB @ 1MHz

Substitution Groups:

Group 1 - Direct Equivalent (35Ohm, Identical Specifications): Parts that maintain all electrical parameters of the MAX351CSE-T with improved product status and compliance.

Group 2 - Functional Equivalent with Higher On-State Resistance (115Ohm): Parts that maintain SPST-NC 4-circuit topology and 16-SOIC package but operate with 115Ohm on-state resistance. These are suitable only when circuit design tolerates increased resistance and extended switching times.

Group 3 - Functional Equivalent with Lower On-State Resistance (24Ohm): Parts that maintain SPST-NC 4-circuit topology and 16-SOIC package with improved on-state resistance performance of 24Ohm. These provide enhanced switching characteristics and reduced power dissipation.

Parameter Comparison

Part Number	Manufacturer	Product Status	On-State Resistance (Max)	ΔRon (Max)	V+ Supply	V± Supply	Ton/Toff (Max)	Charge Injection	IS(off) (Max)	Crosstalk	Temp Range	Package	RoHS Status	Packaging Type
MAX351CSE-T	Analog Devices Inc./Maxim	Obsolete	35Ohm	2Ohm	10V ~ 30V	±4.5V ~ 20V	175ns, 145ns	5pC	250pA	-85dB @ 1MHz	0°C ~ 70°C	16-SOIC	Non-compliant	Tube
MAX351CSE+T	Analog Devices Inc./Maxim	Active	35Ohm	2Ohm	10V ~ 30V	±4.5V ~ 20V	175ns, 145ns	5pC	250pA	-85dB @ 1MHz	0°C ~ 70°C	16-SOIC	ROHS3 Compliant	Tape & Reel
ADG411BRZ	Analog Devices Inc.	Active	35Ohm	—	12V	±15V	175ns, 145ns	5pC	250pA	-85dB @ 1MHz	-40°C ~ 85°C	16-SOIC	ROHS3 Compliant	Tube
ADG411BRZ-REEL	Analog Devices Inc.	Active	35Ohm	—	12V	±15V	175ns, 145ns	5pC	250pA	-85dB @ 1MHz	-40°C ~ 85°C	16-SOIC	ROHS3 Compliant	Cut Tape & Digi-Reel
ADG411BRZ-REEL7	Analog Devices Inc.	Active	35Ohm	—	12V	±15V	175ns, 145ns	5pC	250pA	-85dB @ 1MHz	-40°C ~ 85°C	16-SOIC	ROHS3 Compliant	Cut Tape & Digi-Reel
ADG431BRZ	Analog Devices Inc.	Active	24Ohm	1.2Ohm	12V	±15V	90ns, 60ns	5pC	250pA	-85dB @ 1MHz	-40°C ~ 85°C	16-SOIC	ROHS3 Compliant	Tube
ADG431BRZ-REEL	Analog Devices Inc.	Active	24Ohm	1.2Ohm	12V	±15V	90ns, 60ns	5pC	250pA	-85dB @ 1MHz	-40°C ~ 85°C	16-SOIC	ROHS3 Compliant	Tape & Reel
ADG431BRZ-REEL7	Analog Devices Inc.	Active	24Ohm	1.2Ohm	12V	±15V	90ns, 60ns	5pC	250pA	-85dB @ 1MHz	-40°C ~ 85°C	16-SOIC	ROHS3 Compliant	Cut Tape & Digi-Reel
ADG211AKRZ	Analog Devices Inc.	Active	115Ohm	5.75Ohm	15V	±15V	600ns, 450ns	20pC	5nA	-80dB @ 100kHz	-40°C ~ 85°C	16-SOIC	ROHS3 Compliant	Tube
ADG211AKRZ-REEL	Analog Devices Inc.	Active	115Ohm	5.75Ohm	15V	±15V	600ns, 450ns	20pC	5nA	-80dB @ 100kHz	-40°C ~ 85°C	16-SOIC	ROHS3 Compliant	Tape & Reel
ADG211AKRZ-REEL7	Analog Devices Inc.	Active	115Ohm	5.75Ohm	15V	±15V	600ns, 450ns	20pC	5nA	-80dB @ 100kHz	-40°C ~ 85°C	16-SOIC	ROHS3 Compliant	Cut Tape & Digi-Reel

Engineering Selection Recommendations

Direct Replacement (Preferred for Existing Designs):

MAX351CSE+T is the primary direct replacement for MAX351CSE-T. Both parts maintain identical electrical specifications including 35Ohm on-state resistance, 175ns/145ns switching times, and equivalent supply voltage ranges. The MAX351CSE+T is active in production status and ROHS3 compliant, addressing the obsolescence and compliance limitations of the original MAX351CSE-T. Packaging is available in Tape & Reel format for production environments.

Active Supply Voltage Compatible Substitutes (35Ohm Class):

ADG411BRZ, ADG411BRZ-REEL, and ADG411BRZ-REEL7 maintain the 35Ohm on-state resistance specification and identical switching performance. These parts are active, ROHS3 compliant, and feature extended operating temperature range (-40°C ~ 85°C). Supply voltage specifications differ: single supply is 12V (versus 10V ~ 30V) and dual supply is ±15V (versus ±4.5V ~ 20V). These parts are suitable for applications operating within the specified voltage ranges.

Enhanced Performance Substitutes (24Ohm Class):

ADG431BRZ, ADG431BRZ-REEL, and ADG431BRZ-REEL7 provide lower on-state resistance of 24Ohm with improved switching performance (90ns/60ns). These parts are active, ROHS3 compliant, and feature extended operating temperature range. Supply voltage specifications are 12V single supply and ±15V dual supply. Lower on-state resistance reduces power dissipation and improves signal integrity in applications tolerating the specified voltage constraints.

Lower Performance Substitutes (115Ohm Class):

ADG211AKRZ, ADG211AKRZ-REEL, and ADG211AKRZ-REEL7 maintain SPST-NC 4-circuit topology and 16-SOIC package but operate with 115Ohm on-state resistance and extended switching times (600ns/450ns). These parts are active and ROHS3 compliant with extended operating temperature range. Supply voltage is fixed at 15V single supply or ±15V dual supply. These parts are suitable only for applications where increased on-state resistance and switching delay are acceptable.

All substitute parts maintain MSL 1 (Unlimited) moisture sensitivity level and are REACH unaffected with EAR99 export classification.

Frequently Asked Questions (FAQ)

Q: Can MAX351CSE+T directly replace MAX351CSE-T in existing designs?

A: Yes. MAX351CSE+T is a direct electrical equivalent with identical on-state resistance (35Ohm), switching times (175ns/145ns), and supply voltage specifications. The primary differences are active product status and ROHS3 compliance. Packaging format differs (Tape & Reel versus Tube), which may require supply chain adjustment but does not affect circuit functionality.

Q: What are the key differences between the 35Ohm, 24Ohm, and 115Ohm substitute groups?

A: On-state resistance directly affects power dissipation and signal attenuation. The 24Ohm ADG431 series provides the lowest resistance with fastest switching (90ns/60ns), reducing power loss in signal paths. The 35Ohm MAX351/ADG411 series maintains the original specification. The 115Ohm ADG211 series increases resistance and switching delay (600ns/450ns), suitable only for applications tolerating these performance trade-offs. Selection depends on circuit requirements for signal integrity and power efficiency.

Q: Are supply voltage ranges compatible across all substitutes?

A: No. MAX351CSE-T and MAX351CSE+T support 10V ~ 30V single supply or ±4.5V ~ 20V dual supply. ADG411 and ADG431 series are fixed at 12V single supply or ±15V dual supply. ADG211 series is fixed at 15V single supply or ±15V dual supply. Verify your circuit's supply voltage falls within the substitute part's specified range before selection.

Q: What packaging options are available for production?

A: MAX351CSE-T is supplied in Tube packaging. Substitutes are available in multiple formats: Tube (standard reel), Tape & Reel (TR) for automated assembly, and Cut Tape & Digi-Reel for mixed-volume production. ADG411BRZ-REEL7 and ADG431BRZ-REEL7 offer the highest inventory availability in Cut Tape & Digi-Reel format.

Q: Does operating temperature range affect substitution?

A: Yes. MAX351CSE-T operates 0°C ~ 70°C. All active substitutes (ADG411, ADG431, ADG211 series) operate -40°C ~ 85°C, providing extended temperature capability. If your application requires only 0°C ~ 70°C operation, all substitutes are suitable. If extended low-temperature operation below 0°C is required, verify the substitute part's lower temperature limit.

Q: Are all substitutes ROHS3 compliant?

A: Yes. MAX351CSE-T is RoHS non-compliant. All recommended substitutes (MAX351CSE+T, ADG411 series, ADG431 series, ADG211 series) are ROHS3 compliant, meeting current environmental regulations for new designs and production.

Q: What is the significance of Channel-to-Channel Matching (ΔRon)?

A: ΔRon specifies the maximum resistance variation between the four switch circuits within a single IC. MAX351CSE-T and MAX351CSE+T specify 2Ohm maximum matching. ADG431 series specifies 1.2Ohm (tighter matching). ADG411 and ADG211 series do not specify this parameter. Tighter matching improves signal uniformity across multiple channels in multiplexing applications.

Q: Can I use ADG211 (115Ohm) in place of MAX351CSE-T?

A: Only if circuit design accommodates 115Ohm on-state resistance, 600ns/450ns switching times, and fixed 15V/±15V supply voltage. The significantly higher resistance increases signal attenuation and power dissipation. Switching delay increases by 3.4x, affecting timing-critical applications. Use only when performance trade-offs are acceptable and supply voltage is compatible.

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