MAX326CPE Equivalent & Substitute Parts

Part Overview

The MAX326CPE is a 4-circuit IC switch with SPST-NC (Single Pole Single Throw - Normally Closed) configuration, manufactured by Analog Devices Inc./Maxim Integrated. This component features 1:1 multiplexer/demultiplexer functionality with 4.6kOhm on-state resistance and operates across single supply (10V ~ 30V) or dual supply (±5V ~ 18V) configurations. The MAX326CPE is classified as obsolete, with 3428 units currently in stock. Due to its obsolete status, identifying functionally equivalent active alternatives is essential for new designs and long-term supply chain continuity.

Key Parameters

Parameter	MAX326CPE
Switch Circuit Configuration	SPST - NC
Number of Circuits	4
Multiplexer/Demultiplexer Ratio	1:1
On-State Resistance (Max)	4.6kOhm
Channel-to-Channel Matching (ΔRon)	175Ohm
Voltage - Supply, Single (V+)	10V ~ 30V
Voltage - Supply, Dual (V±)	±5V ~ 18V
Switch Time (Ton, Toff) (Max)	1µs, 500ns
Charge Injection	2pC
Channel Capacitance (CS(off), CD(off))	1.7pF, 1.7pF
Current - Leakage (IS(off)) (Max)	10pA
Crosstalk	-90dB @ 100kHz
Operating Temperature	0°C ~ 70°C (TA)
Package / Case	16-DIP (0.300", 7.62mm)
Mounting Type	Through Hole
Product Status	Obsolete
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution eligibility for the MAX326CPE is determined by the following mandatory parameters:

Switch Circuit Configuration: Must be SPST - NC (Single Pole Single Throw - Normally Closed)
Number of Circuits: Must be 4
Multiplexer/Demultiplexer Ratio: Must be 1:1
Package / Case: Must be 16-DIP (0.300", 7.62mm)
Mounting Type: Must be Through Hole

All identified substitute parts meet these core requirements. Variations in on-state resistance, switching speed, leakage current, and operating temperature range are acceptable within the constraints of the application. The MAX326CPE+ is a direct variant with identical electrical specifications but improved RoHS compliance and active product status. The ADG441BNZ, DG271BCJ-E3, and DG441DJ-E3 are functionally equivalent alternatives with lower on-state resistance values and enhanced performance characteristics, suitable for applications where reduced resistance and faster switching are beneficial.

Parameter Comparison

Parameter	MAX326CPE	MAX326CPE+	ADG441BNZ	DG271BCJ-E3	DG441DJ-E3
Switch Circuit	SPST - NC	SPST - NC	SPST - NC	SPST - NC	SPST - NC
Number of Circuits	4	4	4	4	4
Multiplexer/Demultiplexer Ratio	1:1	1:1	1:1	1:1	1:1
On-State Resistance (Max)	4.6kOhm	4.6kOhm	70Ohm	50Ohm	85Ohm
Voltage - Supply, Single (V+)	10V ~ 30V	10V ~ 30V	12V	-	12V
Voltage - Supply, Dual (V±)	±5V ~ 18V	±5V ~ 18V	±15V	±15V	±15V
Switch Time (Ton, Toff) (Max)	1µs, 500ns	1µs, 500ns	110ns, 60ns	65ns, 65ns	220ns, 120ns
Charge Injection	2pC	2pC	1pC	-5pC	-1pC
Channel Capacitance (CS(off), CD(off))	1.7pF, 1.7pF	1.7pF, 1.7pF	4pF, 4pF	8pF, 8pF	4pF, 4pF
Current - Leakage (IS(off)) (Max)	10pA	10pA	500pA	1nA	500pA
Crosstalk	-90dB @ 100kHz	-90dB @ 100kHz	-100dB @ 1MHz	-100dB @ 100kHz	-100dB @ 1MHz
Operating Temperature	0°C ~ 70°C	0°C ~ 70°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Package / Case	16-DIP (0.300", 7.62mm)	16-DIP (0.300", 7.62mm)	16-DIP (0.300", 7.62mm)	16-DIP (0.300", 7.62mm)	16-DIP (0.300", 7.62mm)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Product Status	Obsolete	Active	Active	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

MAX326CPE+ (Direct Upgrade) The MAX326CPE+ is the preferred direct substitute, offering identical electrical specifications to the MAX326CPE while maintaining active product status and ROHS3 compliance. This part is suitable for applications requiring no design modifications and provides the most straightforward transition path from the obsolete MAX326CPE.

ADG441BNZ (Analog Devices Inc.) The ADG441BNZ is an active Analog Devices alternative with significantly reduced on-state resistance (70Ohm vs. 4.6kOhm), faster switching times (110ns/60ns vs. 1µs/500ns), and extended operating temperature range (-40°C ~ 85°C). This part is ROHS3 compliant and suitable for applications where lower resistance and improved switching performance are advantageous. Supply voltage is limited to 12V single supply or ±15V dual supply.

DG271BCJ-E3 (Vishay Siliconix) The DG271BCJ-E3 offers the lowest on-state resistance (50Ohm) and fastest switching times (65ns/65ns) among all alternatives, with ROHS3 compliance and extended operating temperature range. This part operates on dual supply only (±15V). It is suitable for high-speed, low-resistance switching applications where dual supply operation is acceptable.

DG441DJ-E3 (Vishay Siliconix) The DG441DJ-E3 provides moderate on-state resistance (85Ohm) with ROHS3 compliance and extended operating temperature range (-40°C ~ 85°C). This part operates on 12V single supply or ±15V dual supply and offers a balance between performance and supply voltage flexibility.

All substitute parts are ROHS3 compliant and carry active product status, ensuring long-term availability and regulatory compliance for new designs.

Frequently Asked Questions (FAQ)

Q: Can MAX326CPE be directly replaced with MAX326CPE+ without circuit modifications? A: Yes. The MAX326CPE+ is a direct variant with identical electrical specifications, package, and pinout. No circuit modifications are required. The primary difference is improved RoHS compliance and active product status.

Q: What are the key differences between MAX326CPE and the lower-resistance alternatives? A: The primary differences are on-state resistance and switching speed. The MAX326CPE features 4.6kOhm resistance with 1µs/500ns switching times. The ADG441BNZ, DG271BCJ-E3, and DG441DJ-E3 offer significantly lower resistance (50Ohm to 85Ohm) and faster switching (65ns to 220ns). These alternatives are suitable for applications requiring reduced signal attenuation and faster response times.

Q: Are all substitute parts compatible with the same supply voltage range? A: No. The MAX326CPE and MAX326CPE+ support both single supply (10V ~ 30V) and dual supply (±5V ~ 18V). The ADG441BNZ and DG441DJ-E3 are limited to 12V single supply or ±15V dual supply. The DG271BCJ-E3 operates on ±15V dual supply only. Verify supply voltage compatibility before selection.

Q: What is the operating temperature range difference? A: The MAX326CPE and MAX326CPE+ operate from 0°C ~ 70°C. All substitute parts (ADG441BNZ, DG271BCJ-E3, DG441DJ-E3) extend the range to -40°C ~ 85°C, providing improved performance in wider temperature environments.

Q: Are all parts available in the same 16-DIP package? A: Yes. All parts are packaged in 16-DIP (0.300", 7.62mm) with through-hole mounting, ensuring mechanical and electrical compatibility on existing PCB layouts.

Q: What is the RoHS compliance status of each part? A: The MAX326CPE is RoHS non-compliant. The MAX326CPE+ and all substitute parts (ADG441BNZ, DG271BCJ-E3, DG441DJ-E3) are ROHS3 compliant, meeting current environmental and regulatory requirements.

Q: Which substitute part should be selected for lowest on-state resistance? A: The DG271BCJ-E3 offers the lowest on-state resistance at 50Ohm. However, it operates on ±15V dual supply only. If single supply operation is required, the DG271BCJ-E3 is not suitable. The ADG441BNZ (70Ohm) or DG441DJ-E3 (85Ohm) are alternatives supporting 12V single supply.

Q: Can these parts be used interchangeably in existing designs? A: Interchangeability depends on application requirements. All parts share identical switch circuit configuration, circuit count, and package. However, differences in on-state resistance, switching speed, leakage current, and supply voltage requirements must be evaluated against circuit specifications. The MAX326CPE+ is the only true drop-in replacement.

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