MAX4530CPP Equivalent & Substitute Parts

Part Overview

The MAX4530CPP is an 8:1 analog multiplexer/demultiplexer IC manufactured by Analog Devices Inc./Maxim Integrated, housed in a 20-DIP package. This component features a single circuit configuration with 75Ohm on-state resistance and operates across supply voltages of 2V to 12V (single supply) or ±2V to ±6V (dual supply). The device is classified as obsolete, necessitating identification of functionally equivalent alternatives for new designs and ongoing production requirements.

Key Parameters

Parameter	MAX4530CPP
Multiplexer/Demultiplexer Circuit	8:1
Number of Circuits	1
On-State Resistance (Max)	75Ohm
Channel-to-Channel Matching (ΔRon)	1Ohm
Voltage - Supply, Single (V+)	2V ~ 12V
Voltage - Supply, Dual (V±)	±2V ~ 6V
Switch Time (Ton, Toff) (Max)	150ns, 100ns
Charge Injection	1.5pC
Channel Capacitance (CS(off), CD(off))	3pF, 15pF
Current - Leakage (IS(off)) (Max)	1nA
Crosstalk	-92dB @ 1MHz
Operating Temperature	0°C ~ 70°C
Package / Case	20-DIP (0.300", 7.62mm)
Product Status	Obsolete
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution eligibility for the MAX4530CPP is determined by the following critical parameters:

Multiplexer/Demultiplexer configuration: 8:1 (mandatory match)
Single circuit topology (mandatory match)
Package type: 20-DIP form factor (mandatory match)
On-state resistance: Maximum 75Ohm (substitute must not exceed this value)
Supply voltage compatibility: Minimum overlap with 2V ~ 12V single supply or ±2V ~ ±6V dual supply ranges
Switch timing performance: Ton and Toff specifications must support application requirements
Leakage current and crosstalk characteristics must remain within acceptable system tolerances

The identified substitute parts CD74HC4351E and CD74HCT4351E both feature 8:1 multiplexer configuration in 20-DIP packaging. However, both substitutes exhibit higher on-state resistance (130Ohm maximum) compared to the MAX4530CPP (75Ohm maximum), representing a functional trade-off that must be evaluated against specific circuit requirements.

Parameter Comparison

Parameter	MAX4530CPP	CD74HC4351E	CD74HCT4351E
Manufacturer	Analog Devices Inc./Maxim Integrated	Texas Instruments	Harris Corporation
Multiplexer/Demultiplexer Circuit	8:1	8:1	8:1
Number of Circuits	1	1	1
On-State Resistance (Max)	75Ohm	130Ohm	130Ohm
Channel-to-Channel Matching (ΔRon)	1Ohm	5Ohm	5Ohm
Voltage - Supply, Single (V+)	2V ~ 12V	2V ~ 6V	4.5V ~ 5.5V
Voltage - Supply, Dual (V±)	±2V ~ 6V	±1V ~ 5V	±1V ~ 5V
Switch Time Ton (Max)	150ns	55ns	60ns
Switch Time Toff (Max)	100ns	50ns	55ns
Current - Leakage (IS(off)) (Max)	1nA	200nA	400nA
Operating Temperature	0°C ~ 70°C	-55°C ~ 125°C	-55°C ~ 125°C
Package / Case	20-DIP (0.300", 7.62mm)	20-DIP (0.300", 7.62mm)	20-DIP (0.300", 7.62mm)
Product Status	Obsolete	Last Time Buy	Obsolete
RoHS Status	RoHS non-compliant	ROHS3 Compliant	RoHS non-compliant

Engineering Selection Recommendations

CD74HC4351E (Texas Instruments) is the preferred substitute option based on the following criteria:

Product status: Last Time Buy designation provides extended availability window compared to obsolete alternatives
RoHS compliance: ROHS3 compliant, meeting modern environmental and regulatory requirements
Supply voltage range: 2V ~ 6V single supply overlaps with the lower portion of MAX4530CPP specifications; dual supply range ±1V ~ 5V is compatible with MAX4530CPP ±2V ~ ±6V range
Performance characteristics: Faster switch times (55ns/50ns vs. 150ns/100ns) provide improved performance margin
Leakage current: 200nA maximum is acceptable for most applications requiring low-leakage multiplexing

CD74HCT4351E (Harris Corporation) represents a secondary alternative with identical functional configuration but narrower supply voltage specifications (4.5V ~ 5.5V single supply) and higher leakage current (400nA maximum). This device is suitable only for applications operating within the 5V supply range.

Frequently Asked Questions (FAQ)

Q: Can CD74HC4351E directly replace MAX4530CPP in existing designs?

A: Direct pin-compatible replacement is possible due to identical 20-DIP packaging. However, the increased on-state resistance (130Ohm vs. 75Ohm) and higher leakage current (200nA vs. 1nA) require circuit verification. Applications sensitive to signal attenuation or requiring ultra-low leakage must be re-evaluated.

Q: What are the supply voltage compatibility constraints?

A: CD74HC4351E supports 2V ~ 6V single supply, which covers the lower operating range of MAX4530CPP (2V ~ 12V). Applications requiring supply voltages above 6V cannot use CD74HC4351E. CD74HCT4351E is limited to 4.5V ~ 5.5V and is suitable only for standard 5V systems.

Q: How do the switch timing specifications compare?

A: CD74HC4351E exhibits significantly faster switching (55ns Ton, 50ns Toff) compared to MAX4530CPP (150ns Ton, 100ns Toff). This performance improvement is beneficial for high-speed multiplexing applications and does not create compatibility issues.

Q: Are there thermal operating range differences?

A: MAX4530CPP operates 0°C ~ 70°C, while both substitute parts operate -55°C ~ 125°C. Substitute parts provide extended temperature range capability, beneficial for industrial and automotive applications.

Q: What is the significance of RoHS compliance status?

A: CD74HC4351E is ROHS3 compliant, meeting current environmental regulations for new product designs and procurement. MAX4530CPP and CD74HCT4351E are RoHS non-compliant, which may restrict use in regulated markets or new system designs.

Q: How do channel capacitance specifications affect substitution?

A: CD74HC4351E exhibits higher channel capacitance (5pF/25pF vs. 3pF/15pF), which may impact high-frequency performance. Applications operating above 100MHz should verify frequency response compatibility.

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