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Analog Devices Inc./Maxim Integrated MAX4646EUK-T
- Part No.:
- MAX4646EUK-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX4646EUK-T.pdf
- Description:
- IC SW SPST-NCX1 2.5OHM SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,745
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Product details
Overview
MAX4646EUK-T from Maxim Integrated is a normally closed (NC) single-pole, single-throw (SPST) CMOS analog switch optimized for low-voltage signal routing. It delivers 2.5Ω typical on-resistance at +5V supply, 0.4Ω max on-resistance flatness over rail-to-rail signal range, and 8ns turn-off time - enabling high-fidelity audio switching and precision data-acquisition paths in battery-powered instrumentation.
For engineers reviewing the MAX4646EUK-T datasheet, MAX4646EUK-T pinout, MAX4646EUK-T application, or MAX4646EUK-T equivalent, key selection criteria include guaranteed RON ≤3.5Ω at +3V, ±0.25nA max off-leakage at +25°C, -75dB off-isolation at 1MHz, and SOT23-5 package compatibility with space-constrained PCB layouts.
Technical Context
The MAX4646EUK-T implements a complementary MOSFET switch architecture with matched P/N channel pairs to achieve rail-to-rail analog conduction (GND to V+) and low charge injection (5pC typ). Its logic input accepts TTL/CMOS-compatible thresholds (VIL = 0.4V/0.8V, VIH = 2.0V/2.4V) across +1.8V to +5.5V supply operation.
Switch state inversion is inherent: logic low enables conduction (NC path closed), while logic high disables it (NC path open). The device guarantees RON flatness ≤0.4Ω and leakage ≤±0.25nA over -40°C to +85°C, supporting stable performance in portable medical sensors and automated test equipment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-Resistance (RON) | 2.5Ω typ at +5V; ensures minimal signal attenuation in 50Ω–600Ω audio/data paths |
| On-Resistance Flatness | 0.4Ω max; maintains consistent gain/attenuation across full 0V to V+ analog swing |
| Turn-Off Time (tOFF) | 8ns typ; supports >10MHz switching in multiplexed ADC sampling or video routing |
| 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 multi-signal systems |
| Supply Voltage Range | +1.8V to +5.5V; enables direct interface with Li-ion (3.0–4.2V) and logic-supply rails |
| Total Harmonic Distortion | 0.014% typ; meets fidelity requirements for line-level audio signal switching |
Pinout & Package
SOT23-5 package: 2.9mm × 1.6mm footprint, 1.1mm height, surface-mount, lead-free, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - IN | Logic control input | Active-low enable: logic low closes NC path; compatible with 1.8V/3.3V/5V CMOS drivers |
| 2 - NO | Normally open terminal | Unconnected when switch is inactive; not internally bonded in MAX4646 variant |
| 3 - GND | Analog/digital ground reference | Common return for V+, signal paths, and logic inputs; requires low-impedance PCB plane |
| 4 - COM | Common analog terminal | Signal input/output node shared between NC and NO paths; handles rail-to-rail voltages |
| 5 - V+ | Positive supply voltage | Single power rail for analog and logic sections; bypassing with 0.1µF to GND recommended |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail analog signal handling | Supports input/output signals from GND to V+ without clipping or distortion |
| Low charge injection (5pC) | Minimizes voltage glitch on sample-and-hold capacitors during switching transitions |
| TTL/CMOS logic compatibility | Operates with standard microcontroller GPIOs without level-shifting circuitry |
| Guaranteed RON flatness ≤0.4Ω | Ensures linear amplitude response across full analog signal range for measurement integrity |
| 1.8V minimum supply operation | Enables integration into ultra-low-power wearable and IoT sensor nodes |
Applications
| Battery-Powered Audio Routing | Low-Voltage Data-Acquisition Systems |
|---|---|
Use Scenario: Switching microphone or line-level audio signals between multiple codecs in portable medical recorders. IC Role / Device Role / Timing Role: NC analog switch selecting active signal path; controlled by MCU GPIO with <8ns tOFF to prevent pop/click artifacts. Use Value: 0.014% THD and rail-to-rail swing preserve audio fidelity; 2.5Ω RON avoids loading effects on high-Z sources. |
Use Scenario: Multiplexing sensor outputs (thermocouples, strain gauges) into a 16-bit SAR ADC in handheld test equipment. IC Role / Device Role / Timing Role: NC switch isolating unused channels; low 0.25nA leakage prevents DC error accumulation in high-impedance front-end. Use Value: 0.4Ω RON flatness ensures consistent gain calibration across all channels; -75dB off-isolation blocks inter-channel interference. |
| Sample-and-Hold Circuits | Relay Replacement in Automated Test Equipment |
Use Scenario: Capturing transient analog waveforms in oscilloscope front-ends using switched-capacitor hold circuits. IC Role / Device Role / Timing Role: NC switch connecting analog input to hold capacitor; fast 8ns tOFF minimizes aperture jitter during acquisition. Use Value: 5pC charge injection limits hold-step error to <1LSB in 16-bit systems; 1.8V operation enables low-power standby modes. |
Use Scenario: Replacing electromechanical relays in PCB test fixtures requiring >1M cycle life and sub-millisecond switching. IC Role / Device Role / Timing Role: NC solid-state switch controlling stimulus/sense paths; driven by FPGA I/O with no external drivers needed. Use Value: 2.5Ω RON and 0.4Ω flatness ensure calibrated signal integrity; eliminates relay wear-out, bounce, and coil drive complexity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SPST analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4645EUK-T | Normally open (NO) configuration; identical RON, timing, and leakage specs | Requires inverted logic control for same functional behavior; unsuitable where default-closed path is mandatory | Select MAX4645EUK-T only when system design requires default-open safety state |
| ADG801BRMZ-REEL7 | 2.3Ω RON at +5V but higher 10ns tOFF; 0.5nA max leakage at +25°C | Higher leakage may degrade accuracy in >10MΩ sensor interfaces; same SOT23-5 footprint | Prefer MAX4646EUK-T for ultra-low-leakage precision applications; ADG801 offers marginally lower RON |
Compared with MAX4645EUK-T and ADG801BRMZ-REEL7, the MAX4646EUK-T uniquely combines NC default state, 0.25nA leakage guarantee, and 8ns tOFF - making it optimal for fail-safe signal routing and high-speed multiplexing where leakage-induced offset and switching latency are critical.
Availability
MAX4646EUK-T 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-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 industrial, medical, and communications applications, emphasizing low-power, high-reliability performance.
The MAX4645/MAX4646 product line targets low-voltage, low-distortion analog switching in portable and space-constrained systems - delivering rail-to-rail signal handling and nanosecond timing for next-generation sensor and audio interfaces.
FAQ
What is the default switch state of the MAX4646EUK-T?
The MAX4646EUK-T is a normally closed (NC) analog switch: when the IN pin is logic low (≤0.8V at +5V supply), the COM-to-NC path is conductive. When IN is logic high (≥2.4V), the path opens. This default-closed behavior is intrinsic to the MAX4646EUK-T silicon design and differs from the NO MAX4645EUK-T variant.
Does the MAX4646EUK-T support rail-to-rail analog signals?
Yes, the MAX4646EUK-T supports rail-to-rail analog signals from GND to V+. Its CMOS switch architecture allows input and output voltages spanning the full supply range without clipping or increased distortion - confirmed by specifications showing VCOM, VNO, and VNC rated from 0V to V+ under all operating conditions.
What is the maximum allowable supply voltage for the MAX4646EUK-T?
The absolute maximum supply voltage for the MAX4646EUK-T is +6V, but the recommended operating range is +1.8V to +5.5V. Operating at +5.5V ensures full compliance with all electrical characteristics including 2.5Ω RON and ±0.25nA leakage; exceeding +6V risks permanent damage per the Absolute Maximum Ratings table.
Can the MAX4646EUK-T be used with a 1.8V logic supply?
Yes, the MAX4646EUK-T operates with logic inputs compatible down to +1.8V supply: VIL is guaranteed ≤0.4V and VIH ≥2.0V at +3V supply, and the device functions correctly with 1.8V CMOS logic levels when V+ ≥1.8V. No level-shifting circuitry is required for interfacing with 1.8V microcontrollers.
What package type is used for the MAX4646EUK-T?
The MAX4646EUK-T uses the SOT23-5 package: a 5-pin, surface-mount outline measuring 2.9mm × 1.6mm with 1.1mm height. Pin 1 is marked by lettering nearest the package edge, and the pinout is IN (1), NO (2), GND (3), COM (4), V+ (5) - matching the functional diagram in the MAX4646 datasheet Rev 2.
MAX4646EUK-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:
- 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-T FAQ
1.How can I place an order for MAX4646EUK-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4646EUK-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 MAX4646EUK-T reliable?
The price and inventory of MAX4646EUK-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4646EUK-T is usually 5 days.
3.What payment methods are accepted for MAX4646EUK-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4646EUK-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4646EUK-T?
MAX4646EUK-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4646EUK-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 MAX4646EUK-T?
For technical support, including MAX4646EUK-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4646EUK-T requirements.
6.How does Aetrix verify that MAX4646EUK-T is sourced from the original manufacturer or authorized distributors?
All MAX4646EUK-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 MAX4646EUK-T meets industry standards.
7.What is the process for return or replacement of MAX4646EUK-T?
All MAX4646EUK-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4646EUK-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 MAX4646EUK-T part is unused and in its original packaging.
Return procedure for MAX4646EUK-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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