MAX4597EXK-T Equivalent & Substitute Parts

Part Overview

The MAX4597EXK-T is a single-circuit SPST-NC (Normally Closed) analog switch IC manufactured by Analog Devices Inc./Maxim Integrated in SC-70-5 package. This component operates across a 2V to 5.5V single supply range with 10Ohm on-state resistance and 300MHz bandwidth, designed for low-impedance signal switching applications. The part is currently obsolete, making equivalent and substitute components necessary for new designs and ongoing production support.

Key Parameters

Parameter	Value
Switch Circuit Type	SPST - NC (Single Pole Single Throw - Normally Closed)
Multiplexer/Demultiplexer Circuit	1:1
Number of Circuits	1
On-State Resistance (Max)	10Ohm
Voltage - Supply, Single (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
Current - Leakage (IS(off)) (Max)	500pA
Operating Temperature	-40°C ~ 85°C (TA)
Package / Case	5-TSSOP, SC-70-5, SOT-353
Mounting Type	Surface Mount
RoHS Status	RoHS non-compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the MAX4597EXK-T is determined by the following critical parameters:

Primary Substitution Criteria:

Switch circuit type: SPST - NC
Multiplexer/Demultiplexer circuit: 1:1
Number of circuits: 1
On-state resistance: 10Ohm (maximum)
Supply voltage range: Must encompass or match 2V ~ 5.5V
Operating temperature: -40°C ~ 85°C
Package compatibility: SC-70-5 (preferred) or alternative surface-mount packages

Secondary Compatibility Factors:

Switch time performance (Ton, Toff)
Bandwidth (-3dB)
Charge injection
Channel capacitance
Leakage current

Substitutes are grouped into three categories: parametric equivalents with identical electrical specifications, direct manufacturer alternatives with compatible performance, and manufacturer-recommended upgrades offering improved performance characteristics.

Parameter Comparison

Part Number	Manufacturer	On-State Resistance (Max)	Supply Voltage (V+)	Switch Time Ton/Toff (Max)	-3dB Bandwidth	Package	Product Status	RoHS Status
MAX4597EXK-T	Analog Devices Inc./Maxim Integrated	10Ohm	2V ~ 5.5V	35ns, 40ns	300MHz	SC-70-5	Obsolete	RoHS non-compliant
MAX4595EXK+T	Analog Devices Inc./Maxim Integrated	10Ohm	2V ~ 5.5V	35ns, 40ns	300MHz	SC-70-5	Active	ROHS3 Compliant
MAX4595DCKR	Texas Instruments	10Ohm	2.4V ~ 5.5V	35ns, 40ns	300MHz	SC-70-5	Active	ROHS3 Compliant
MAX4597DBVR	Texas Instruments	10Ohm	2.4V ~ 5.5V	35ns, 40ns	300MHz	SOT-23-5	Active	ROHS3 Compliant
MAX4597DCKR	Texas Instruments	10Ohm	2.4V ~ 5.5V	35ns, 40ns	300MHz	SC-70-5	Active	ROHS3 Compliant
TS5A4597DBVR	Texas Instruments	8Ohm	2V ~ 5.5V	17ns, 14ns	450MHz	SOT-23-5	Active	ROHS3 Compliant
TS5A4597DCKR	Texas Instruments	8Ohm	2V ~ 5.5V	17ns, 14ns	450MHz	SC-70-5	Active	ROHS3 Compliant
ADG742BKSZ5-REEL7	Analog Devices Inc.	3Ohm	1.8V ~ 5.5V	12ns, 8ns	200MHz	SC-70-5	Active	ROHS3 Compliant

Engineering Selection Recommendations

Direct Replacement (Identical Electrical Performance): MAX4595EXK+T is the primary direct replacement, offering identical electrical specifications to the MAX4597EXK-T with active product status and ROHS3 compliance. This part maintains the same 10Ohm on-state resistance, 2V to 5.5V supply range, and SC-70-5 package footprint.

Package-Compatible Alternatives (SC-70-5): MAX4595DCKR, MAX4597DCKR, and TS5A4597DCKR maintain SC-70-5 package compatibility. MAX4595DCKR and MAX4597DCKR preserve the 10Ohm on-state resistance specification. TS5A4597DCKR offers improved performance with 8Ohm on-state resistance, faster switching times (17ns/14ns), and higher bandwidth (450MHz), suitable for applications requiring enhanced speed and lower impedance.

Alternative Package Options: MAX4597DBVR and TS5A4597DBVR are available in SOT-23-5 package for space-constrained designs. Both maintain electrical compatibility with the original part's supply voltage range and operating temperature. TS5A4597DBVR provides performance improvements identical to its SC-70-5 counterpart.

Performance-Enhanced Substitute: ADG742BKSZ5-REEL7 offers superior electrical characteristics with 3Ohm on-state resistance, faster switching (12ns/14ns typical), and extended supply voltage range (1.8V to 5.5V). This part is suitable for applications requiring lower impedance and improved speed performance, though bandwidth is reduced to 200MHz.

Compliance Consideration: All recommended substitutes carry ROHS3 compliance, addressing the RoHS non-compliance status of the obsolete MAX4597EXK-T. This is critical for new designs and production environments with regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can MAX4595EXK+T directly replace MAX4597EXK-T without circuit modifications? A: Yes. MAX4595EXK+T is electrically and mechanically identical to MAX4597EXK-T, with identical on-state resistance (10Ohm), supply voltage range (2V to 5.5V), switching times, and SC-70-5 package. The primary difference is active product status and ROHS3 compliance.

Q: What is the minimum supply voltage difference between MAX4597EXK-T and Texas Instruments alternatives? A: MAX4597EXK-T operates from 2V minimum, while MAX4595DCKR, MAX4597DCKR, and MAX4597DBVR require 2.4V minimum. Applications operating below 2.4V require MAX4595EXK+T, TS5A4597DBVR, or TS5A4597DCKR (all support 2V minimum).

Q: Are TS5A4597 parts suitable replacements for MAX4597 applications? A: TS5A4597 parts are functionally compatible but offer improved performance. On-state resistance is lower (8Ohm vs. 10Ohm), switching is faster (17ns/14ns vs. 35ns/40ns), and bandwidth is higher (450MHz vs. 300MHz). These improvements are generally beneficial and do not create compatibility issues in existing designs.

Q: What is the package footprint difference between SC-70-5 and SOT-23-5? A: Both are 5-pin surface-mount packages with different physical dimensions. SC-70-5 (SOT-353) is smaller and more compact. SOT-23-5 (SC-74A, SOT-753) is larger. PCB layout modifications are required when switching between these packages.

Q: Is ADG742BKSZ5-REEL7 a direct substitute for MAX4597EXK-T? A: ADG742BKSZ5-REEL7 is functionally compatible but not a direct substitute. It offers superior performance (3Ohm resistance, faster switching, extended voltage range) but reduced bandwidth (200MHz vs. 300MHz). Selection depends on application requirements for impedance, speed, and frequency response.

Q: Which substitute offers the best performance upgrade? A: TS5A4597DCKR and TS5A4597DBVR provide the most comprehensive performance improvement: 8Ohm on-state resistance (vs. 10Ohm), 17ns/14ns switching times (vs. 35ns/40ns), and 450MHz bandwidth (vs. 300MHz). Both maintain the 2V to 5.5V supply range and are ROHS3 compliant.

Q: Are all substitutes available in Tape & Reel packaging? A: Most substitutes are available in Tape & Reel (TR) packaging. TS5A4597DBVR is supplied in Cut Tape (CT) & Digi-Reel format. Verify packaging availability with your supplier for production requirements.

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