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Analog Devices Inc./Maxim Integrated MAX4646EUK
- Part No.:
- MAX4646EUK
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX4646EUK.pdf
- Description:
- IC SW SPST-NCX1 2.5OHM SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,076
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Product details
Overview
MAX4646EUK from Maxim Integrated is a normally closed (NC) single-pole, single-throw (SPST) CMOS analog switch optimized for low-distortion signal routing. It delivers 2.5Ω typical on-resistance at +5V supply, 0.4Ω max on-resistance flatness over rail-to-rail signal range (0V to V+), and 8ns turn-off time. Used in battery-powered audio routing and precision sample-and-hold circuits where leakage <0.25nA and THD = 0.014% are critical.
For engineers reviewing the MAX4646EUK datasheet, MAX4646EUK pinout, MAX4646EUK application, or MAX4646EUK equivalent, key selection criteria include guaranteed RON ≤2.5Ω at 5V, NC logic behavior, SOT23-5 package compatibility, and -75dB off-isolation at 1MHz - all verified across -40°C to +85°C.
Technical Context
The MAX4646EUK implements a CMOS transmission-gate architecture with matched P/N channel devices to achieve rail-to-rail analog conduction and minimal charge injection (5pC). Its control logic is TTL/CMOS-compatible, with VIH = 2.4V and VIL = 0.8V referenced to GND under +5V operation.
Internal ESD protection and diode clamping enable safe handling of signals exceeding V+ or GND by ±0.3V. The device operates without external biasing, supporting direct interface to microcontroller GPIOs and ADC/DAC signal paths in portable instrumentation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-Resistance (RON) | 2.5Ω typical at V+ = 5V - ensures minimal voltage drop and gain error in precision signal paths |
| On-Resistance Flatness | 0.4Ω max - maintains consistent attenuation across full 0V–5V analog input range |
| Turn-Off Time (tOFF) | 8ns typical - enables high-speed multiplexing in data acquisition sampling clocks |
| Off-Leakage Current | ±0.25nA max at +25°C - preserves accuracy in high-impedance sensor front-ends |
| Off-Isolation | -75dB at 1MHz - suppresses crosstalk between adjacent channels in audio/video routing |
| Total Harmonic Distortion | 0.014% typical - meets fidelity requirements for line-level audio switching |
| Supply Voltage Range | +1.8V to +5.5V - supports direct integration into Li-ion (3.7V) and USB-powered (5V) systems |
Pinout & Package
MAX4646EUK is housed in a 5-pin SOT23 package (JEDEC MO-178AA) with 1.6mm × 2.9mm footprint and 1.1mm height. Pin 1 is marked by lettering nearest the corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Logic Control Input | Active-low control: logic 0 closes switch (NC), logic 1 opens it - directly driven by MCU GPIO |
| 2 (GND) | Ground Reference | Return path for logic and analog signals; must be low-impedance to minimize THD and noise coupling |
| 3 (COM) | Analog Common Terminal | Switch pole connection; interfaces to ADC input, DAC output, or sensor signal path |
| 4 (NC) | Normally Closed Terminal | Analog path closed to COM when IN = 0; open when IN = 1 - defines default signal continuity state |
| 5 (V+) | Positive Supply | +1.8V to +5.5V analog/digital supply; bypassing with 0.1µF capacitor to GND required for noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-Rail Signal Handling | Supports analog inputs from GND to V+ without clipping - eliminates level-shifting in mixed-supply systems |
| TTL/CMOS-Compatible Logic | VIH = 2.4V / VIL = 0.8V at 5V supply - ensures reliable switching with standard digital outputs without pull-ups |
| Low Charge Injection | 5pC typical - minimizes voltage glitch on high-impedance nodes (e.g., sample-and-hold capacitors) |
| Guaranteed RON Over Temp | ≤3.5Ω max at 3V supply across -40°C to +85°C - enables stable performance in industrial environments |
| Low Power Consumption | I+ = 0.1µA max - extends battery life in always-on portable measurement devices |
Applications
| Battery-Powered Audio Routing | Low-Voltage Data Acquisition |
|---|---|
|
Use Scenario: Switching microphone or line-level audio signals between multiple codecs in handheld test equipment. IC Role / Device Role / Timing Role: NC analog switch providing default signal path integrity during power-up and MCU initialization. Use Value: 0.014% THD and -75dB off-isolation preserve signal fidelity; 2.5Ω RON avoids gain mismatch between channels. |
Use Scenario: Multiplexing sensor outputs (thermocouples, strain gauges) into a 16-bit SAR ADC in portable environmental monitors. IC Role / Device Role / Timing Role: Low-leakage (±0.25nA) SPST switch isolating high-Z sources to prevent measurement drift. Use Value: 0.4Ω RON flatness ensures linear response across full input range; 8ns tOFF supports ≥10MSPS sampling rates. |
| Sample-and-Hold Circuits | Relay Replacement in Test Equipment |
|
Use Scenario: Controlling hold capacitor charging in precision analog front-ends for oscilloscopes and digitizers. IC Role / Device Role / Timing Role: NC switch maintaining capacitor connection until triggered open by control logic. Use Value: 5pC charge injection prevents hold-step errors; rail-to-rail operation accommodates ±2.5V input ranges. |
Use Scenario: Replacing electromechanical relays in automated test fixtures requiring >1M cycle lifetime and sub-10ns timing control. IC Role / Device Role / Timing Role: Solid-state SPST switch enabling programmable signal path configuration via digital control. Use Value: 12ns tON/8ns tOFF allows rapid test sequence execution; no contact wear or bounce improves repeatability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SPST analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADG801BRMZ | NO configuration (not NC); 0.5Ω RON at 5V; 1.8V–5.5V supply; 6-lead MSOP package | Requires logic inversion for NC behavior; lower RON suits ultra-low-loss paths but lacks default continuity | Select ADG801BRMZ only if normally open function suffices and board layout accommodates MSOP footprint |
| TS5A23157DBVR | NC/NO dual-channel; 0.9Ω RON at 5V; 1.65V–5.5V supply; 6-lead SOT23 package | Dual switch increases channel density but doubles supply current (1µA vs. 0.1µA); higher THD (0.02%) | Choose TS5A23157DBVR when dual-path routing is needed and power budget allows 10× higher I+ |
Compared with MAX4646EUK, ADG801BRMZ offers lower on-resistance but requires redesign for NO logic and different packaging, while TS5A23157DBVR provides dual-channel integration at the cost of higher distortion and quiescent current - making MAX4646EUK optimal for single-channel NC-critical, low-power, high-fidelity applications.
Availability
MAX4646EUK is available at Aetrix Electronics and suitable for battery-powered systems, audio and video signal routing, and low-voltage data-acquisition systems requiring stable component supply across industrial temperature ranges.
Supply support for MAX4646EUK 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 industrial, medical, and communications applications, with emphasis on low-power, high-reliability solutions.
The MAX4645/MAX4646 product line targets low-voltage, low-distortion analog switching in space-constrained portable systems - delivering rail-to-rail performance and nanosecond timing without external support components.
FAQ
What is the logic behavior of the MAX4646EUK?
The MAX4646EUK is a normally closed (NC) analog switch: when the IN pin is logic low (≤0.8V), the COM-to-NC path is closed; when IN is logic high (≥2.4V), the path opens. This default-closed behavior ensures signal continuity during power-up or MCU reset, making MAX4646EUK ideal for fail-safe routing in test equipment and portable instruments.
Does the MAX4646EUK support rail-to-rail analog signals?
Yes, the MAX4646EUK supports rail-to-rail analog signals from GND to V+, verified across its full operating supply range (+1.8V to +5.5V). This capability is enabled by its CMOS transmission-gate structure and internal level-shifting, allowing direct interfacing with sensors, ADCs, and DACs without external biasing - a confirmed feature in the MAX4646EUK datasheet Section "Detailed Description".
What is the maximum allowable analog signal voltage for the MAX4646EUK?
The MAX4646EUK allows analog signals on COM, NC, or NO terminals from -0.3V to (V+ + 0.3V), per Absolute Maximum Ratings. Internal clamping diodes limit excursions beyond this range, but sustained operation outside GND to V+ degrades RON flatness and increases leakage. For reliable rail-to-rail use, keep signals strictly within 0V to V+ - a design constraint explicitly validated for MAX4646EUK in Electrical Characteristics tables.
Can the MAX4646EUK operate from a 3.3V supply?
Yes, the MAX4646EUK operates fully specified from +2.7V to +3.3V, with RON ≤3.5Ω max, tON/tOFF ≤15ns/10ns, and leakage ≤±0.25nA. Its 1.8V minimum supply enables direct use with modern low-voltage MCUs and battery systems - confirmed in the "ELECTRICAL CHARACTERISTICS-Single +3V Supply" section of the MAX4646EUK datasheet.
What package type is used for the MAX4646EUK?
The MAX4646EUK uses the 5-pin SOT23 package (JEDEC MO-178AA), with pin 1 identified by marking nearest the corner. This compact 1.6mm × 2.9mm outline matches industry-standard footprints and supports reflow soldering per JEDEC J-STD-020. Package dimensions and thermal characteristics (571mW at +70°C) are documented in the MAX4646EUK datasheet Package Information section.
MAX4646EUK Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Switch Circuit:
- SPST - NC
- Multiplexer/Demultiplexer Circuit:
- 1:1
- Number of Circuits:
- 1
- On-State Resistance (Max):
- 2.5Ohm
- Channel-to-Channel Matching (ΔRon):
- 100mOhm
- Voltage - Supply, Single (V+):
- 1.8V ~ 5V
- Voltage - Supply, Dual (V±):
- -
- Switch Time (Ton, Toff) (Max):
- 15ns, 10ns
- -3db Bandwidth:
- -
- Charge Injection:
- 5pC
- Channel Capacitance (CS(off), CD(off)):
- 17pF, 17pF
- Current - Leakage (IS(off)) (Max):
- 250pA
- Crosstalk:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX4646EUK FAQ
1.How can I place an order for MAX4646EUK through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4646EUK 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 MAX4646EUK reliable?
The price and inventory of MAX4646EUK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4646EUK is usually 5 days.
3.What payment methods are accepted for MAX4646EUK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4646EUK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4646EUK?
MAX4646EUK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4646EUK 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 MAX4646EUK?
For technical support, including MAX4646EUK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4646EUK requirements.
6.How does Aetrix verify that MAX4646EUK is sourced from the original manufacturer or authorized distributors?
All MAX4646EUK 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 MAX4646EUK meets industry standards.
7.What is the process for return or replacement of MAX4646EUK?
All MAX4646EUK units undergo pre-shipment inspection (PSI). If there is an issue with MAX4646EUK, 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 MAX4646EUK part is unused and in its original packaging.
Return procedure for MAX4646EUK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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