MAX318ESA+ Equivalent & Substitute Parts

Part Overview

The MAX318ESA+ is a single-circuit SPST-NO (Normally Open) analog switch manufactured by Analog Devices Inc./Maxim Integrated. This interface component operates as a 1:1 multiplexer/demultiplexer with 35Ohm on-state resistance and is designed for signal routing applications requiring low on-resistance and fast switching performance. The part is currently in active production status with 843 units in stock. Equivalent and substitute parts are identified based on matching electrical characteristics, package compatibility, and operational parameters that ensure functional interchangeability in circuit applications.

Key Parameters

Parameter	Value
Switch Circuit Type	SPST - NO
Multiplexer/Demultiplexer Configuration	1:1
Number of Circuits	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	3pC
Channel Capacitance (CS(off), CD(off))	8pF, 8pF
Current - Leakage (IS(off)) (Max)	250pA
Crosstalk	-85dB @ 1MHz
Operating Temperature	-40°C ~ 85°C (TA)
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the MAX318ESA+ is determined by the following critical parameters:

Electrical Compatibility Criteria:

Switch circuit type: SPST - NO configuration
On-state resistance: 35Ohm maximum
Operating temperature range: -40°C ~ 85°C
Package type: 8-SOIC surface mount
Supply voltage compatibility: Single supply 10V ~ 30V or dual supply ±4.5V ~ 20V

Identified Substitute Parts:

The MAX318ESA+ has two qualified substitute parts from Vishay Siliconix:

DG418DY-E3 (Tube packaging) - Direct electrical equivalent with identical on-state resistance, switch timing, and package configuration. Voltage supply specifications differ (12V single, ±15V dual) but remain within compatible operating ranges for most applications.
DG418DY-T1-E3 (Tape & Reel packaging) - Functionally identical to DG418DY-E3 with the same electrical characteristics. Packaging format differs to support high-volume automated assembly requirements.

Both Vishay substitutes maintain the core switching functionality and 8-SOIC package footprint, enabling direct board-level replacement when supply constraints or inventory requirements necessitate alternative sourcing.

Parameter Comparison

Parameter	MAX318ESA+	DG418DY-E3	DG418DY-T1-E3
Manufacturer	Analog Devices Inc./Maxim Integrated	Vishay Siliconix	Vishay Siliconix
Switch Circuit	SPST - NO	SPST - NO	SPST - NO
Multiplexer Configuration	1:1	1:1	1:1
Number of Circuits	1	1	1
On-State Resistance (Max)	35Ohm	35Ohm	35Ohm
Voltage - Supply, Single (V+)	10V ~ 30V	12V	12V
Voltage - Supply, Dual (V±)	±4.5V ~ 20V	±15V	±15V
Switch Time (Ton, Toff) (Max)	175ns, 145ns	175ns, 145ns	175ns, 145ns
Charge Injection	3pC	60pC	60pC
Channel Capacitance (CS(off), CD(off))	8pF, 8pF	8pF, 8pF	8pF, 8pF
Current - Leakage (IS(off)) (Max)	250pA	250pA	250pA
Operating Temperature	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)
Package / Case	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Packaging Format	Tube	Tube	Tape & Reel (TR)
Inventory Availability	843 Pcs	1295 Pcs	25100 Pcs

Engineering Selection Recommendations

Primary Selection (MAX318ESA+): The MAX318ESA+ remains the baseline reference part. It is in active production status, ROHS3 compliant, and carries MSL Level 1 rating. This part is suitable for applications requiring the specified charge injection (3pC) and supply voltage range (10V ~ 30V single, ±4.5V ~ 20V dual).

Substitute Selection (DG418DY-E3 or DG418DY-T1-E3): The Vishay DG418 series substitutes are functionally equivalent and maintain ROHS3 compliance and MSL Level 1 rating. Selection between DG418DY-E3 (Tube) and DG418DY-T1-E3 (Tape & Reel) depends on assembly volume and procurement requirements. The DG418DY-T1-E3 offers significantly higher inventory availability (25100 units) for high-volume production scenarios.

Voltage Supply Consideration: The DG418 series operates at fixed supply voltages (12V single, ±15V dual) compared to the MAX318ESA+ range specifications. Applications requiring the full voltage range of the MAX318ESA+ (10V ~ 30V single supply) must confirm DG418 operation at the intended supply voltage before substitution.

Charge Injection Difference: The DG418 series exhibits higher charge injection (60pC) compared to the MAX318ESA+ (3pC). Applications sensitive to charge injection effects must evaluate this parameter difference for circuit performance impact.

Frequently Asked Questions (FAQ)

Q: Can DG418DY-E3 and DG418DY-T1-E3 be used interchangeably with MAX318ESA+?

A: Both DG418 variants are electrically equivalent to the MAX318ESA+ and share the identical 8-SOIC package footprint. The primary difference is packaging format: DG418DY-E3 is supplied in Tube format, while DG418DY-T1-E3 is supplied in Tape & Reel format. Selection depends on assembly process requirements and volume. Both maintain the same electrical performance and compliance certifications.

Q: What is the key difference between MAX318ESA+ and DG418DY series?

A: The primary electrical differences are: (1) Supply voltage specifications—MAX318ESA+ supports 10V ~ 30V single supply and ±4.5V ~ 20V dual supply, while DG418 operates at fixed 12V single and ±15V dual; (2) Charge injection—MAX318ESA+ specifies 3pC versus DG418's 60pC. Both maintain identical on-state resistance (35Ohm), switch timing (175ns/145ns), and package configuration.

Q: Are there any compliance or certification differences between these parts?

A: No. All three parts (MAX318ESA+, DG418DY-E3, and DG418DY-T1-E3) are ROHS3 compliant, carry MSL Level 1 rating, and are REACH unaffected. Compliance certifications are identical across all substitutes.

Q: Which substitute should be selected for high-volume production?

A: DG418DY-T1-E3 (Tape & Reel format) is recommended for high-volume production due to significantly higher inventory availability (25100 units) and compatibility with automated assembly equipment. DG418DY-E3 (Tube format) is suitable for lower-volume or manual assembly scenarios.

Q: Can MAX318ESA+ be used in applications designed for DG418DY series?

A: Yes, the MAX318ESA+ is functionally compatible with DG418 applications. The MAX318ESA+ offers superior charge injection performance (3pC versus 60pC) and broader supply voltage range, making it suitable for applications with tighter charge injection specifications or non-standard supply voltages within its operating range.

Q: What is the significance of the 8-SOIC package specification?

A: The 8-SOIC (Small Outline Integrated Circuit) package with 0.154" width and 3.90mm height is the standard surface-mount package for all three parts. This identical package ensures direct board-level compatibility without PCB redesign or rework when substituting between MAX318ESA+ and DG418 variants.

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