MAX4596EXK-T Equivalent & Substitute Parts

Part Overview

The MAX4596EXK-T is a single-circuit SPST (Single Pole Single Throw) analog switch IC manufactured by Analog Devices Inc./Maxim Integrated in SC-70-5 package. This component operates as a 1:1 multiplexer/demultiplexer with 10Ω on-state resistance and supports supply voltages from 2V to 5.5V. The part is currently listed as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity.

Key Parameters

Parameter	Value
Switch Circuit Type	SPST - NO (Normally Open)
Multiplexer/Demultiplexer Configuration	1:1
Number of Circuits	1
On-State Resistance (Max)	10Ω
Supply Voltage Range (V+)	2V ~ 5.5V
Switch Time (Ton/Toff Max)	35ns / 40ns
-3dB Bandwidth	300MHz
Charge Injection	2pC
Channel Capacitance (CS(off)/CD(off))	8pF / 8pF
Leakage Current (IS(off) Max)	500pA
Operating Temperature	-40°C ~ 85°C
Package Type	5-TSSOP, SC-70-5, SOT-353
Mounting Type	Surface Mount
RoHS Status	RoHS non-compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the MAX4596EXK-T is determined by the following critical parameters:

Switch circuit configuration (SPST - NO)
Multiplexer/demultiplexer ratio (1:1)
On-state resistance tolerance (10Ω nominal)
Supply voltage compatibility (2V ~ 5.5V minimum overlap)
Package compatibility (SC-70-5 / 5-TSSOP / SOT-353)
Operating temperature range (-40°C ~ 85°C minimum)
Surface mount capability

Substitute parts are grouped into three categories:

Parametric Equivalents: Parts with identical electrical specifications and SC-70-5 packaging. These provide direct functional replacement with active product status and improved RoHS compliance.

Direct Manufacturer Alternatives: Parts from different manufacturers with matching core specifications but potentially different supply voltage minimums or packaging variants.

MFR Recommended Alternatives: Parts with similar functionality but relaxed on-state resistance specifications or enhanced performance characteristics, suitable for applications where the original specification can be exceeded.

Parameter Comparison

Part Number	Manufacturer	Status	Ron (Max)	V+ Range	Ton/Toff (Max)	BW (-3dB)	Package	RoHS
MAX4596EXK-T	Analog Devices/Maxim	Obsolete	10Ω	2V ~ 5.5V	35ns / 40ns	300MHz	SC-70-5	Non-compliant
MAX4594EXK+T	Analog Devices/Maxim	Active	10Ω	2V ~ 5.5V	35ns / 40ns	300MHz	SC-70-5	ROHS3 Compliant
MAX4596EXK+T	Analog Devices/Maxim	Active	10Ω	2V ~ 5.5V	35ns / 40ns	300MHz	SC-70-5	ROHS3 Compliant
MAX4594DCKR	Texas Instruments	Active	10Ω	2.4V ~ 5.5V	35ns / 40ns	300MHz	SC-70-5	ROHS3 Compliant
MAX4596DCKR	Texas Instruments	Active	10Ω	2.4V ~ 5.5V	35ns / 40ns	300MHz	SC-70-5	ROHS3 Compliant
MAX4596DBVR	Texas Instruments	Active	10Ω	2.4V ~ 5.5V	35ns / 40ns	300MHz	SOT-23-5	ROHS3 Compliant
TS5A4596DCKR	Texas Instruments	Active	8Ω	2V ~ 5.5V	17ns / 14ns	450MHz	SC-70-5	ROHS3 Compliant
TS5A4596DBVR	Texas Instruments	Active	8Ω	2V ~ 5.5V	17ns / 14ns	450MHz	SOT-23-5	ROHS3 Compliant
ADG741BKSZ5-REEL7	Analog Devices	Active	3Ω	1.8V ~ 5.5V	12ns / 8ns	200MHz	SC-70-5	ROHS3 Compliant
74AHC1G66GW-Q100H	Nexperia USA Inc.	Active	22Ω	2V ~ 5.5V	11ns / 11ns	280MHz	5-TSSOP	ROHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation - Parametric Equivalent: MAX4594EXK+T or MAX4596EXK+T are the preferred direct replacements. Both maintain identical electrical specifications to the original MAX4596EXK-T while offering active product status and ROHS3 compliance. These parts are sourced from Analog Devices/Maxim and provide the lowest risk migration path.

Secondary Recommendation - Texas Instruments Variants: MAX4596DCKR and MAX4594DCKR from Texas Instruments provide functional equivalence with SC-70-5 packaging. Note the minimum supply voltage increases to 2.4V, which may require design verification for applications operating below this threshold. Both parts carry ROHS3 compliance and active status.

Alternative for Enhanced Performance: TS5A4596DCKR and TS5A4596DBVR offer improved electrical characteristics with lower on-state resistance (8Ω), faster switching times (17ns/14ns), and higher bandwidth (450MHz). These are suitable for designs where performance headroom is available and the lower resistance specification is beneficial.

Alternative for Lower Resistance Applications: ADG741BKSZ5-REEL7 provides the lowest on-state resistance (3Ω) and supports extended supply voltage range (1.8V ~ 5.5V). This part is appropriate for applications requiring lower insertion loss or operation at reduced supply voltages.

Alternative for Automotive Applications: 74AHC1G66GW-Q100H from Nexperia includes AEC-Q100 automotive qualification and operates across -40°C to 125°C. The 22Ω on-state resistance is higher than the original specification and requires application-level compatibility assessment.

All recommended substitutes maintain SPST-NO configuration, 1:1 multiplexer operation, and surface mount capability. Product status is active for all alternatives, ensuring long-term availability.

Frequently Asked Questions (FAQ)

Q: Can MAX4594EXK+T directly replace MAX4596EXK-T without PCB modifications? A: Yes. MAX4594EXK+T is a parametric equivalent with identical electrical specifications and SC-70-5 packaging. No PCB layout changes are required. The primary difference is improved RoHS3 compliance and active product status.

Q: What is the impact of the 2.4V minimum supply voltage in MAX4596DCKR compared to the original 2V specification? A: Applications operating between 2V and 2.4V require design verification. If your circuit operates above 2.4V, this part is fully compatible. For designs requiring 2V operation, MAX4594EXK+T or TS5A4596DCKR are preferred.

Q: Are TS5A4596 variants pin-compatible with MAX4596EXK-T? A: TS5A4596DCKR maintains SC-70-5 packaging and pin compatibility. TS5A4596DBVR uses SOT-23-5 packaging, which requires PCB layout changes. Both offer superior electrical performance with lower on-state resistance and faster switching.

Q: Can I use 74AHC1G66GW-Q100H as a direct substitute? A: Functional substitution is possible, but the 22Ω on-state resistance is significantly higher than the original 10Ω specification. Applications sensitive to insertion loss or signal attenuation require circuit-level analysis before adoption.

Q: What is the difference between SC-70-5 and SOT-23-5 packaging? A: Both are 5-pin surface mount packages with identical electrical performance. SC-70-5 (SOT-353) is smaller and more compact. SOT-23-5 (SC-74A) is larger with improved thermal characteristics. Package selection depends on PCB space constraints and thermal requirements.

Q: Is ADG741BKSZ5-REEL7 suitable for my 3.3V application? A: Yes. ADG741BKSZ5-REEL7 supports 1.8V to 5.5V supply range, making it compatible with 3.3V systems. The 3Ω on-state resistance provides superior performance compared to the original 10Ω specification.

Q: Which substitute offers the best long-term availability? A: MAX4594EXK+T and MAX4596DCKR both carry active product status from established manufacturers (Analog Devices and Texas Instruments). Both are recommended for new designs requiring extended production lifecycles.

Q: Do all substitutes maintain the same leakage current specification? A: Most substitutes maintain 500pA maximum leakage current. ADG741BKSZ5-REEL7 specifies 250pA, offering improved leakage performance. 74AHC1G66GW-Q100H specifies 100nA, which is significantly higher and may impact low-power applications.

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