MAX325CSA Equivalent & Substitute Parts

Part Overview

The MAX325CSA is a 2-circuit IC switch with SPST (Single Pole Single Throw) NO/NC configuration, manufactured by Analog Devices Inc./Maxim Integrated. This component operates as a 1:1 multiplexer/demultiplexer with 60Ohm on-state resistance and is housed in an 8-SOIC surface mount package. The MAX325CSA is classified as obsolete, making identification of suitable alternatives essential for ongoing design support and production continuity.

Key Parameters

Parameter	Value
Switch Circuit Type	SPST - NO/NC
Number of Circuits	2
Multiplexer/Demultiplexer Configuration	1:1
On-State Resistance (Max)	60Ohm
Channel-to-Channel Matching (ΔRon)	800mOhm
Supply Voltage Range (Single)	2.7V ~ 16V
Switch Time - Ton (Max)	150ns
Switch Time - Toff (Max)	100ns
Charge Injection	1pC
Channel Capacitance (CS(off), CD(off))	9pF, 9pF
Leakage Current (IS(off)) Max	100pA
Crosstalk	-85dB @ 1MHz
Operating Temperature Range	0°C ~ 70°C
Package Type	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount

Substitute Part Grouping Explanation

Substitution eligibility for the MAX325CSA is determined by strict equivalence across the following critical parameters:

Switch circuit configuration (SPST - NO/NC)
Number of circuits (2)
Multiplexer/demultiplexer ratio (1:1)
On-state resistance specification (60Ohm maximum)
Channel-to-channel matching tolerance (800mOhm)
Supply voltage range (2.7V ~ 16V single supply)
Switching time specifications (Ton 150ns max, Toff 100ns max)
Charge injection (1pC)
Channel capacitance values (9pF, 9pF)
Leakage current specification (100pA maximum)
Crosstalk performance (-85dB @ 1MHz)
Operating temperature range (0°C ~ 70°C)
Package and pinout compatibility (8-SOIC)

Only parts meeting all these electrical and mechanical parameters qualify as direct substitutes.

Parameter Comparison

Parameter	MAX325CSA (Main Part)	MAX325CSA+ (Substitute)
Manufacturer	Analog Devices Inc./Maxim Integrated	Analog Devices Inc./Maxim Integrated
Switch Circuit	SPST - NO/NC	SPST - NO/NC
Number of Circuits	2	2
Multiplexer Configuration	1:1	1:1
On-State Resistance (Max)	60Ohm	60Ohm
Channel-to-Channel Matching (ΔRon)	800mOhm	800mOhm
Supply Voltage (V+)	2.7V ~ 16V	2.7V ~ 16V
Switch Time - Ton (Max)	150ns	150ns
Switch Time - Toff (Max)	100ns	100ns
Charge Injection	1pC	1pC
Channel Capacitance (CS(off), CD(off))	9pF, 9pF	9pF, 9pF
Leakage Current (IS(off)) Max	100pA	100pA
Crosstalk	-85dB @ 1MHz	-85dB @ 1MHz
Operating Temperature	0°C ~ 70°C	0°C ~ 70°C
Package / Case	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm 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 MAX325CSA+ is a direct electrical and mechanical equivalent to the MAX325CSA. Both parts share identical electrical specifications across all switching, timing, and signal integrity parameters. The primary distinction is product lifecycle status: the MAX325CSA is obsolete, while the MAX325CSA+ is active.

The MAX325CSA+ offers improved compliance posture with ROHS3 certification, whereas the original MAX325CSA is RoHS non-compliant. Both parts maintain REACH Unaffected status and EAR99 export classification. The MAX325CSA+ is supplied in tube packaging, providing standard handling and storage conditions for surface mount components.

For new designs or production continuity where the MAX325CSA is no longer available, the MAX325CSA+ provides full functional and pinout compatibility with identical electrical performance across the specified operating range.

Frequently Asked Questions (FAQ)

Q: Can MAX325CSA+ be used as a direct replacement for MAX325CSA in existing designs?

A: Yes. The MAX325CSA+ is electrically and mechanically identical to the MAX325CSA. All switching characteristics, timing parameters, and signal integrity specifications are equivalent. Pinout and package dimensions are identical, supporting direct PCB-level substitution.

Q: What is the significance of the product status difference (Obsolete vs. Active)?

A: The MAX325CSA is classified as obsolete and is no longer in active production. The MAX325CSA+ is an active product with ongoing manufacturing and supply chain support. For production applications requiring long-term component availability, the MAX325CSA+ is the appropriate selection.

Q: Does the RoHS compliance difference affect electrical performance?

A: No. RoHS compliance status reflects manufacturing process and material composition standards, not electrical performance. Both parts meet identical electrical specifications. The MAX325CSA+ offers improved environmental compliance with ROHS3 certification.

Q: Are the 8-SOIC packages identical between both parts?

A: Yes. Both parts use the same 8-SOIC package with 0.154" (3.90mm) width. Pinout, lead spacing, and mechanical dimensions are identical, supporting direct PCB compatibility.

Q: What packaging formats are available for each part?

A: The MAX325CSA+ is supplied in tube packaging. The original MAX325CSA packaging format is not specified in the available data. Tube packaging is standard for surface mount components and supports automated assembly processes.

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