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Analog Devices Inc./Maxim Integrated MAX4542EKA-T
- Part No.:
- MAX4542EKA-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-8
- Datasheet:
-
MAX4542EKA-T.pdf
- Description:
- IC SWITCH SPST-NCX2 60OHM SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:2,192
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Product details
Overview
MAX4542EKA-T from Maxim Integrated is a precision dual normally closed (NC) SPST analog switch operating from a single +2.7V to +12V supply. It delivers 60Ω max on-resistance, 2Ω max RON matching between channels, and 5pC max charge injection-enabling high-fidelity signal routing in battery-powered audio/video switching and portable medical ultrasound front-ends.
For engineers reviewing the MAX4542EKA-T datasheet, MAX4542EKA-T pinout, MAX4542EKA-T application, or MAX4542EKA-T equivalent, key selection criteria include guaranteed break-before-make timing (for MAX4543/MAX4544 only-not applicable), -40°C to +85°C industrial temperature rating, SOT23-8 package footprint, and TTL/CMOS logic compatibility with rail-to-rail input drive capability.
Technical Context
The MAX4542EKA-T implements two independent NC SPST switches in a monolithic CMOS process, each with bidirectional analog signal paths and matched channel characteristics. Its architecture supports full-rail analog signal switching (GND to V+) while maintaining low leakage (<10nA at +85°C) and fast switching (tON = 35ns typ, tOFF = 25ns typ at +5V).
It features integrated ESD protection (>2000V per Method 3015.7), low power consumption (<5µW), and guaranteed performance across its specified industrial temperature range. The device is not break-before-make; it operates as a true dual NC switch with no internal interlock between channels.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.7V to +12V single supply - enables direct interface with 3.3V, 5V, and 12V systems without level shifting |
| On-Resistance (RON) | 60Ω max at +5V - ensures minimal signal attenuation and distortion in precision analog paths |
| RON Matching | 2Ω max between channels - critical for balanced differential signal routing and instrumentation applications |
| Charge Injection | 5pC max - reduces glitch-induced errors in sample-and-hold and multiplexed ADC front-ends |
| Leakage Current | 10nA max at +85°C - preserves signal integrity in high-impedance sensor interfaces |
| Switching Speed | tON = 35ns, tOFF = 25ns (typ at +5V) - supports high-speed multiplexing up to ~10MHz bandwidth |
| ESD Protection | >2000V per Method 3015.7 - provides robust handling margin during board assembly and field operation |
Pinout & Package
SOT23-8 package (top mark: AAAF), 1.50mm × 2.30mm body, 0.65mm pitch, exposed pad (EP) - optimized for space-constrained portable designs with thermal enhancement via EP-to-V+ connection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (COM1) | Analog Common 1 | Input/output node for first NC switch; bidirectional signal path tied to NC1 when enabled |
| 2 (IN1) | Digital Control 1 | Active-low logic input: drives COM1–NC1 closed when low (0V), open when high (≥2.4V) |
| 3 (GND) | Ground Reference | Return path for supply and logic; must be low-impedance for noise-sensitive analog operation |
| 4 (NC2) | Analog Normally Closed 2 | Output terminal of second NC switch; connected to COM2 when IN2 = low |
| 5 (COM2) | Analog Common 2 | Input/output node for second NC switch; bidirectional path tied to NC2 when enabled |
| 6 (IN2) | Digital Control 2 | Active-low logic input: drives COM2–NC2 closed when low, open when high |
| 7 (V+) | Positive Supply | Single power rail (2.7V–12V); powers analog core and logic interface; EP must connect to V+ |
| 8 (NC1) | Analog Normally Closed 1 | Output terminal of first NC switch; connected to COM1 when IN1 = low |
Key Features
| Feature | Design Value |
|---|---|
| Dual NC SPST topology | Provides fail-safe closed-path behavior on power loss-critical for safety-critical signal hold or biasing circuits |
| 6Ω max RON flatness | Ensures consistent gain/attenuation across full analog input range (GND to V+), minimizing harmonic distortion |
| TTL/CMOS logic compatible | Accepts 0.8V/2.4V thresholds at +5V supply; supports rail-to-rail logic drive at other voltages for lowest power |
| Low 100pA max off-leakage | Maintains accuracy in high-impedance sensor monitoring and microamp-level current measurement paths |
| Pin-compatible with MAX323/MAX324/MAX325 | Enables drop-in upgrade path for legacy designs requiring lower RON, tighter matching, and improved ESD |
Applications
| Battery-Powered Audio Switching | Portable Ultrasound Signal Routing |
|---|---|
Use Scenario: Selecting between multiple microphone inputs or speaker outputs in handheld voice recorders and Bluetooth headsets. IC Role / Device Role: Dual NC SPST analog switch providing low-distortion, low-power signal path selection with automatic default connection on power-down. Use Value: 60Ω max RON and 5pC max charge injection preserve audio fidelity; <5µW quiescent power extends battery life. | Use Scenario: Multiplexing transducer receive channels in handheld ultrasound probes with tight size and thermal constraints. IC Role / Device Role: Precision analog switch enabling time-gated echo sampling with minimal signal degradation and crosstalk. Use Value: 2Ω max RON matching ensures channel-to-channel amplitude consistency; >2000V ESD protects against probe handling discharge. |
| Industrial Sensor Signal Conditioning | Test Equipment Channel Multiplexing |
Use Scenario: Routing thermocouple or RTD signals into a shared precision ADC in programmable logic controllers (PLCs). IC Role / Device Role: Low-leakage analog switch isolating high-impedance sensor nodes while maintaining DC accuracy. Use Value: 10nA max off-leakage at +85°C prevents offset drift; -40°C to +85°C rating supports uncontrolled industrial environments. | Use Scenario: Building automated test fixtures that route DUT signals to multiple measurement instruments (oscilloscope, spectrum analyzer, DMM). IC Role / Device Role: High-speed, low-crosstalk analog switch enabling flexible signal path configuration without manual re-wiring. Use Value: -76dB off-isolation and -90dB crosstalk prevent measurement contamination; 35ns switching enables rapid test sequencing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual SPST analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4541EKA-T | Dual NO (normally open) configuration vs. MAX4542EKA-T's dual NC; identical RON, leakage, and speed specs | Used where default-open safety state is required (e.g., disabling power paths on startup) | Select MAX4541EKA-T when fail-open behavior is needed; MAX4542EKA-T for fail-closed |
| MAX4543EKA-T | One NO + one NC channel (SPDT-equivalent); includes guaranteed break-before-make timing (2ns–10ns) | Required for applications needing channel isolation during transition (e.g., relay replacement, power domain switching) | Choose MAX4543EKA-T only if break-before-make is mandatory; otherwise MAX4542EKA-T offers simpler dual-NC control |
Compared with MAX4541EKA-T (dual NO) and MAX4543EKA-T (NO+NC with break-before-make), the MAX4542EKA-T provides deterministic fail-closed operation without transition timing constraints-ideal for bias preservation, default signal routing, and power-loss-safe analog paths.
Availability
MAX4542EKA-T is available at Aetrix Electronics and suitable for battery-powered audio switching, portable ultrasound signal routing, and industrial sensor signal conditioning requiring stable component supply across extended temperature ranges.
Supply support for MAX4542EKA-T includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Maxim Integrated (now part of Analog Devices) designs precision analog and mixed-signal ICs for demanding industrial, medical, and communications applications.
The MAX4541–MAX4544 family targets low-voltage, single-supply analog switching in space- and power-constrained systems-emphasizing low RON, low charge injection, and robust ESD for portable and harsh-environment use.
FAQ
What is the logic polarity of the control inputs on the MAX4542EKA-T?
The MAX4542EKA-T uses active-low logic: each INx pin must be driven low (≤0.8V) to close its respective NC switch (connect COMx to NCx), and high (≥2.4V at +5V supply) to open it. This behavior is confirmed in the truth tables and pin descriptions of the official datasheet, and applies identically to both IN1 and IN2 on the MAX4542EKA-T.
Does the MAX4542EKA-T support rail-to-rail analog signal switching?
Yes, the MAX4542EKA-T supports analog signals from GND to V+ across its full specified supply range (+2.7V to +12V). Its CMOS switch architecture maintains low and stable on-resistance over this entire voltage range, as verified in the "ON-Resistance vs. COM Voltage" typical operating characteristic curves for the MAX4542EKA-T.
Is the MAX4542EKA-T pin-compatible with older Maxim analog switches?
Yes, the MAX4542EKA-T is pin-compatible with the MAX323, MAX324, and MAX325 in the SOT23-8 package. This allows direct replacement in existing layouts, delivering improved specifications-including lower RON, tighter matching, reduced charge injection, and higher ESD rating-without PCB modification.
What is the maximum allowable analog signal voltage on the MAX4542EKA-T when V+ = +12V?
When V+ = +12V, the absolute maximum analog signal voltage on COM, NC, or NO pins is V+ + 0.3V = +12.3V, per the Absolute Maximum Ratings table. However, the functional analog signal range remains 0V to +12V (GND to V+), and signals beyond this range risk clamping by internal diodes and increased leakage.
Does the MAX4542EKA-T provide break-before-make switching?
No, the MAX4542EKA-T does not provide break-before-make functionality. It is a dual independent NC SPST switch with no internal timing interlock between channels. Break-before-make is explicitly guaranteed only for the MAX4543EKA-T and MAX4544EUT-T variants, as stated in the Features section and Truth Tables of the MAX4542EKA-T datasheet.
MAX4542EKA-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Switch Circuit:
- SPST - NC
- Multiplexer/Demultiplexer Circuit:
- 1:1
- Number of Circuits:
- 2
- On-State Resistance (Max):
- 60Ohm
- Channel-to-Channel Matching (ΔRon):
- 800mOhm
- Voltage - Supply, Single (V+):
- 2.7V ~ 12V
- Voltage - Supply, Dual (V±):
- -
- Switch Time (Ton, Toff) (Max):
- 100ns, 75ns
- -3db Bandwidth:
- -
- Charge Injection:
- 1pC
- Channel Capacitance (CS(off), CD(off)):
- 8pF, 8pF
- Current - Leakage (IS(off)) (Max):
- 100pA
- Crosstalk:
- -90dB @ 1MHz
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-8
MAX4542EKA-T FAQ
1.How can I place an order for MAX4542EKA-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4542EKA-T on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MAX4542EKA-T reliable?
The price and inventory of MAX4542EKA-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4542EKA-T is usually 5 days.
3.What payment methods are accepted for MAX4542EKA-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4542EKA-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4542EKA-T?
MAX4542EKA-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4542EKA-T order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MAX4542EKA-T?
For technical support, including MAX4542EKA-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4542EKA-T requirements.
6.How does Aetrix verify that MAX4542EKA-T is sourced from the original manufacturer or authorized distributors?
All MAX4542EKA-T products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MAX4542EKA-T meets industry standards.
7.What is the process for return or replacement of MAX4542EKA-T?
All MAX4542EKA-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4542EKA-T, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MAX4542EKA-T part is unused and in its original packaging.
Return procedure for MAX4542EKA-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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