MAX333AEUP Equivalent & Substitute Parts

Part Overview

The MAX333AEUP is a 4-circuit SPDT analog switch IC manufactured by Analog Devices Inc./Maxim Integrated, housed in a 20-TSSOP package with 45Ohm on-state resistance. This component is classified as obsolete, which necessitates identification of functionally equivalent alternatives for new designs and ongoing production support. The part operates across a wide supply voltage range (10V to 30V single supply, or ±4.5V to ±20V dual supply) and is suitable for signal routing and multiplexing applications in industrial and consumer electronics.

Key Parameters

Parameter	MAX333AEUP Value
Switch Circuit Type	SPDT (Single-Pole Double-Throw)
Multiplexer/Demultiplexer Circuit	2:1
Number of Circuits	4
On-State Resistance (Max)	45Ohm
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	2pC
Channel Capacitance (CS(off), CD(off))	5pF
Current - Leakage (IS(off)) (Max)	250pA
Crosstalk	-78dB @ 1MHz
Operating Temperature	-40°C ~ 85°C (TA)
Package / Case	20-TSSOP (0.173", 4.40mm Width)
RoHS Status	RoHS non-compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the MAX333AEUP is determined by the following critical parameters:

Primary Substitution Criteria:

Switch circuit topology (SPDT 2:1 configuration with 4 circuits)
On-state resistance compatibility (45Ohm nominal)
Package type (20-TSSOP form factor)
Supply voltage range overlap (minimum 10V to 30V single supply capability)
Operating temperature range (-40°C to 85°C minimum)

Substitution Categories:

Direct Packaging Equivalent (MAX333AEUP+): Identical electrical specifications and 20-TSSOP package, differentiated only by packaging format (Tube vs. standard) and product status (Active vs. Obsolete). RoHS3 compliant variant available.
SPDT 2:1 Topology with Lower On-State Resistance (ADG1634BRUZ, ADG1634BRUZ-REEL7, ADG5434BRUZ, ADG5434BRUZ-REEL7): These parts maintain SPDT 2:1 switch topology and 4-circuit configuration in 20-TSSOP package but feature reduced on-state resistance (4.5Ohm or 14Ohm). Supply voltage ranges differ; ADG1634 supports 3.3V to 16V single supply, while ADG5434 supports 9V to 40V single supply. Both are active products with RoHS3 compliance.
SPDT 2:1 Topology with Package Variant (ADG333ABRSZ, ADG333ABRSZ-REEL): Maintains SPDT 2:1 topology, 4-circuit configuration, and 45Ohm on-state resistance but uses 20-SSOP package (0.209", 5.30mm width) instead of 20-TSSOP. Supply voltage range is 3V to 30V single supply. Active product with RoHS3 compliance.
Alternative Topology (ADG1334BRSZ, ADG1334BRSZ-REEL): SPST NO/NC topology (1:1 multiplexer) with 4 circuits in 20-SSOP package. Higher on-state resistance (200Ohm) and different supply requirements (12V single or ±15V dual). Suitable only for applications not requiring SPDT switching capability.

Parameter Comparison

Part Number	Switch Circuit	Multiplexer Type	Number of Circuits	On-State Resistance (Max)	ΔRon (Max)	V+ Supply Range	V± Supply Range	Ton/Toff (Max)	Package	Product Status	RoHS Status
MAX333AEUP	SPDT	2:1	4	45Ohm	2Ohm	10V ~ 30V	±4.5V ~ 20V	175ns, 145ns	20-TSSOP	Obsolete	Non-compliant
MAX333AEUP+	SPDT	2:1	4	45Ohm	2Ohm	10V ~ 30V	±4.5V ~ 20V	175ns, 145ns	20-TSSOP	Active	ROHS3 Compliant
ADG1634BRUZ	SPDT	2:1	4	4.5Ohm	120mOhm	3.3V ~ 16V	±3.3V ~ 8V	38ns, 152ns	20-TSSOP	Active	ROHS3 Compliant
ADG1634BRUZ-REEL7	SPDT	2:1	4	4.5Ohm	120mOhm	3.3V ~ 16V	±3.3V ~ 8V	38ns, 152ns	20-TSSOP	Active	ROHS3 Compliant
ADG5434BRUZ	SPDT	2:1	4	14Ohm	300mOhm	9V ~ 40V	±9V ~ 22V	186ns, 104ns	20-TSSOP	Active	ROHS3 Compliant
ADG5434BRUZ-REEL7	SPDT	2:1	4	14Ohm	300mOhm	9V ~ 40V	±9V ~ 22V	186ns, 104ns	20-TSSOP	Active	ROHS3 Compliant
ADG333ABRSZ	SPDT	2:1	4	45Ohm	5Ohm	3V ~ 30V	±3V ~ 20V	90ns, 80ns (Typ)	20-SSOP	Active	ROHS3 Compliant
ADG333ABRSZ-REEL	SPDT	2:1	4	45Ohm	5Ohm	3V ~ 30V	±3V ~ 20V	90ns, 80ns (Typ)	20-SSOP	Active	ROHS3 Compliant
ADG1334BRSZ	SPST - NO/NC	1:1	4	200Ohm	5Ohm	12V	±15V	130ns, 85ns	20-SSOP	Active	ROHS3 Compliant
ADG1334BRSZ-REEL	SPST - NO/NC	1:1	4	200Ohm	5Ohm	12V	±15V	130ns, 85ns	20-SSOP	Active	ROHS3 Compliant

Engineering Selection Recommendations

Recommended Primary Substitute: MAX333AEUP+

The MAX333AEUP+ is the direct functional equivalent with identical electrical specifications and 20-TSSOP package compatibility. It is the only substitute that requires no circuit redesign or PCB layout modification. The part is currently in active production status with RoHS3 compliance, addressing the obsolescence of the original MAX333AEUP.

Secondary Substitutes for SPDT 2:1 Applications:

ADG1634BRUZ / ADG1634BRUZ-REEL7: Select when lower on-state resistance (4.5Ohm) is beneficial for signal integrity in low-voltage applications (3.3V to 16V single supply). Maintains 20-TSSOP package footprint. Active product with RoHS3 compliance.
ADG5434BRUZ / ADG5434BRUZ-REEL7: Select when higher supply voltage capability (9V to 40V single supply) is required. On-state resistance of 14Ohm provides intermediate performance between MAX333AEUP and ADG1634 variants. Maintains 20-TSSOP package footprint. Active product with RoHS3 compliance.
ADG333ABRSZ / ADG333ABRSZ-REEL: Select when 20-SSOP package footprint is acceptable and lower supply voltage operation (3V minimum) is required. Maintains 45Ohm on-state resistance specification. Requires PCB layout modification due to package change. Active product with RoHS3 compliance.

Not Recommended for Direct Substitution:

ADG1334BRSZ and ADG1334BRSZ-REEL employ SPST NO/NC topology (1:1 multiplexer) instead of SPDT 2:1 configuration, making them unsuitable for applications requiring dual-throw switching capability. These parts are appropriate only for single-throw switching applications with different circuit architecture requirements.

Frequently Asked Questions (FAQ)

Q: Can MAX333AEUP+ be used as a direct replacement without circuit modification?

A: Yes. MAX333AEUP+ is electrically and mechanically identical to MAX333AEUP, with the same 20-TSSOP package footprint, pin configuration, and electrical specifications. No circuit redesign is required. The primary difference is product status (Active vs. Obsolete) and RoHS compliance level.

Q: What is the key difference between ADG1634BRUZ and ADG5434BRUZ?

A: Both maintain SPDT 2:1 topology in 20-TSSOP package but differ in on-state resistance and supply voltage range. ADG1634BRUZ offers 4.5Ohm resistance with 3.3V to 16V supply capability, optimized for low-voltage applications. ADG5434BRUZ offers 14Ohm resistance with 9V to 40V supply capability, optimized for higher-voltage applications. Selection depends on target supply voltage and acceptable on-state resistance for your signal path.

Q: Why does ADG333ABRSZ have a different package (20-SSOP vs. 20-TSSOP)?

A: ADG333ABRSZ uses 20-SSOP package (0.209" width) compared to MAX333AEUP's 20-TSSOP package (0.173" width). While both are 20-pin surface-mount packages, the physical dimensions differ, requiring PCB layout modification. Pin count and function remain equivalent for SPDT 2:1 switching.

Q: Is ADG1334BRSZ compatible with MAX333AEUP applications?

A: No. ADG1334BRSZ uses SPST NO/NC topology (1:1 multiplexer) instead of SPDT 2:1 configuration. It cannot perform dual-throw switching and is unsuitable for applications requiring simultaneous connection to two signal paths. Use only if your application requires single-throw switching exclusively.

Q: What does RoHS3 compliance mean for these substitutes?

A: RoHS3 compliance indicates the part meets Restriction of Hazardous Substances Directive requirements, restricting use of lead, cadmium, mercury, and other hazardous materials. The original MAX333AEUP is RoHS non-compliant. All recommended substitutes (MAX333AEUP+, ADG1634BRUZ, ADG5434BRUZ, ADG333ABRSZ, ADG1334BRSZ) are RoHS3 compliant, supporting modern environmental and regulatory requirements.

Q: Can I use ADG1634BRUZ in a 30V supply application?

A: No. ADG1634BRUZ maximum single supply voltage is 16V. For 30V supply applications, use ADG5434BRUZ (9V to 40V range) or MAX333AEUP+ (10V to 30V range). Exceeding rated supply voltage will damage the component.

Q: What is the significance of packaging format (Tube vs. Cut Tape & Digi-Reel)?

A: Packaging format affects component delivery and handling but not electrical function. Tube packaging is suitable for manual assembly and smaller quantities. Cut Tape & Digi-Reel format is optimized for automated pick-and-place assembly and higher-volume production. Electrical specifications remain identical between packaging variants of the same part number.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message