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Analog Devices Inc./Maxim Integrated MAX4646EUT+T
- Part No.:
- MAX4646EUT+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-6
- Datasheet:
-
MAX4646EUT+T.pdf
- Description:
- IC SWITCH SPST-NCX1 2.5OHM SOT6
- Quantity:
- Payment:
- Shipping:
Inventory:2,916
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Product details
Overview
MAX4646EUT+T 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 0.25nA max off-leakage at +25°C. Used in audio/video routing and battery-powered data-acquisition systems where mechanical relay replacement is required.
For engineers reviewing the MAX4646EUT+T datasheet, MAX4646EUT+T pinout, MAX4646EUT+T application, or MAX4646EUT+T equivalent, key selection criteria include guaranteed RON flatness, TTL/CMOS logic compatibility, -75dB off-isolation at 1MHz, 12ns turn-on time, and SOT23-5 package compatibility with space-constrained PCB layouts.
Technical Context
The MAX4646EUT+T implements a CMOS transmission-gate architecture enabling rail-to-rail analog signal handling from GND to V+ (1.8V–5.5V). Its NC configuration ensures default conduction path between COM and NC terminals when logic input is low, with fast switching (tON = 12ns, tOFF = 8ns) and minimal charge injection (5pC).
Internal ESD protection and diode clamping allow safe operation with analog signals exceeding supply rails by ±0.3V. Logic inputs accept TTL/CMOS thresholds (VIL ≤ 0.8V, VIH ≥ 2.4V at 5V), and leakage currents are 100% tested at +85°C with correlation to +25°C performance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-Resistance (RON) | 2.5Ω typical at V+ = 5V - enables low insertion loss in precision signal paths |
| On-Resistance Flatness | 0.4Ω max - ensures consistent gain and linearity across full analog signal swing (0V to V+) |
| Turn-On / Turn-Off Time | 12ns / 8ns at +25°C - supports high-speed multiplexing in data-acquisition and communications circuits |
| Off-Isolation | -75dB at 1MHz - suppresses crosstalk between inactive channels in multi-signal routing |
| Off-Leakage Current | ±0.25nA max at +25°C - preserves accuracy in high-impedance sample-and-hold and sensor interfaces |
| Supply Voltage Range | +1.8V to +5.5V - supports direct integration into Li-ion battery-powered systems (2.7–4.2V nominal) |
| Total Harmonic Distortion | 0.014% typical - maintains fidelity in audio-frequency analog signal switching |
Pinout & Package
MAX4646EUT+T is packaged in a 5-pin SOT23 surface-mount package (JEDEC MO-178AA) with 1.6mm × 2.9mm footprint and 1.1mm height. Pin 5 is marked with alphanumeric top-side marking nearest the pin.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - IN | Logic control input | Active-low control: logic 0 connects COM–NC; logic 1 opens path |
| 2 - NO | Normally open terminal | Unconnected in default state; no internal connection in MAX4646 variant |
| 3 - GND | Ground reference | Return path for logic and analog circuitry; must be low-impedance |
| 4 - COM | Analog common terminal | Shared signal node routed to NC when switch is closed |
| 5 - V+ | Positive supply | Single supply rail (1.8V–5.5V); powers internal CMOS switches and logic |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail analog signal handling | Supports input/output signals from GND to V+ without clipping or distortion |
| TTL/CMOS logic compatibility | Accepts standard 5V logic thresholds without level-shifting circuitry |
| Low charge injection (5pC) | Minimizes voltage glitch at COM during switching-critical in sample-and-hold accuracy |
| Guaranteed RON flatness (0.4Ω max) | Ensures uniform channel resistance across full signal range for low THD |
| 100% production-tested leakage at +85°C | Validates reliability in industrial temperature environments without derating assumptions |
Applications
| Audio Signal Routing | Portable Data Acquisition |
|---|---|
Use Scenario: Switching stereo audio channels between multiple sources (e.g., mic, line-in, Bluetooth codec) in handheld audio recorders. IC Role / Device Role / Timing Role: NC SPST analog switch providing default signal path integrity and fast mute/unmute transitions. Use Value: 0.014% THD and -75dB off-isolation preserve dynamic range and prevent audible crosstalk between active/inactive inputs. |
Use Scenario: Multiplexing sensor outputs (thermocouple, RTD, strain gauge) into a shared ADC front-end in battery-operated field instruments. IC Role / Device Role / Timing Role: Low-leakage (±0.25nA), rail-to-rail switch enabling high-impedance sensor interface without signal degradation. Use Value: 2.5Ω RON and 0.4Ω flatness minimize gain error and nonlinearity across full temperature range (-40°C to +85°C). |
| Relay Replacement | Sample-and-Hold Circuits |
Use Scenario: Replacing electromechanical relays in automated test equipment (ATE) fixture control for signal path selection. IC Role / Device Role / Timing Role: Solid-state NC switch delivering >1M cycle lifetime, zero contact bounce, and 12ns switching vs. 10ms relay actuation. Use Value: Eliminates PCB space, power, and reliability penalties of relays while maintaining <1µV offset error in precision DC signal paths. |
Use Scenario: Holding analog voltage from a fast-settling amplifier onto a hold capacitor during ADC conversion cycles. IC Role / Device Role / Timing Role: Low-charge-injection (5pC), low-RON switch minimizing droop and pedestal error in acquisition phase. Use Value: Enables sub-16-bit accuracy in portable instrumentation by reducing aperture uncertainty and hold-step error. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SPST analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4645EUT+T | Normally open (NO) configuration; identical RON, timing, and leakage specs | Requires active-high logic to close path; unsuitable where default-closed safety path is mandated | Select MAX4645EUT+T only when system logic requires default-open behavior and failsafe open state is acceptable |
| TMUX1574DSFR | Higher RON (4.5Ω typ at 5V), wider supply (1.08V–5.5V), no guaranteed RON flatness spec | Supports lower-voltage logic (1.2V I/O), but lacks flatness guarantee critical for precision AC signal routing | Choose TMUX1574DSFR only if 1.08V operation is mandatory and RON variation across signal range is tolerable |
Compared with MAX4646EUT+T, MAX4645EUT+T provides complementary logic polarity but identical analog performance, while TMUX1574DSFR trades guaranteed flatness and lower RON for broader voltage support-making MAX4646EUT+T optimal for precision, rail-to-rail, NC-critical designs.
Availability
MAX4646EUT+T is available at Aetrix Electronics and suitable for battery-powered systems, audio/video signal routing, and low-voltage data-acquisition systems requiring stable component supply across industrial temperature ranges (-40°C to +85°C).
Supply support for MAX4646EUT+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 high-performance analog, mixed-signal, and power-management ICs for demanding industrial, automotive, and communications applications.
The MAX4645/MAX4646 product line targets low-voltage, low-distortion analog switching in space- and power-constrained systems-emphasizing rail-to-rail operation, guaranteed RON flatness, and mechanical relay replacement.
FAQ
What is the logic polarity of MAX4646EUT+T?
The MAX4646EUT+T is a normally closed (NC) analog switch: when the IN pin is logic low (≤0.8V), the COM–NC path is conductive; when IN is logic high (≥2.4V), the path opens. This differs from the MAX4645EUT+T, which is normally open. The MAX4646EUT+T truth table confirms ON state at logic 0 input, making it suitable for fail-safe closed-path applications.
Does MAX4646EUT+T support rail-to-rail analog signals?
Yes, MAX4646EUT+T supports rail-to-rail analog signals from GND to V+, verified across its full operating supply range (+1.8V to +5.5V). Internal CMOS switch architecture allows analog voltages equal to or within the supply rails without distortion or clipping. This capability is explicitly confirmed in the "Detailed Description" and "Electrical Characteristics" sections of the MAX4646EUT+T datasheet.
What is the maximum allowable analog signal voltage beyond the supply rails for MAX4646EUT+T?
The MAX4646EUT+T permits analog signals up to ±0.3V beyond the supply rails (i.e., VCOM, VNC may range from -0.3V to V+ + 0.3V), per Absolute Maximum Ratings. Internal diode clamping limits forward current to ±50mA continuous, so external series resistors are recommended if transient overvoltage exceeds this margin. This rating applies regardless of whether V+ is 1.8V or 5.5V.
Is MAX4646EUT+T pin-compatible with other packages in the MAX4645/MAX4646 family?
No-MAX4646EUT+T is specifically the 5-pin SOT23 variant. The same MAX4646 device is also offered in 6-pin SOT23 and 8-pin µMAX packages, each with distinct pinouts and terminal assignments (e.g., SOT23-6 includes dedicated NC and NO pins; SOT23-5 leaves NO unconnected). PCB layout must match the exact package: MAX4646EUT+T uses SOT23-5 pin 1=IN, 2=NO (NC), 3=GND, 4=COM, 5=V+.
What is the thermal performance of MAX4646EUT+T in SOT23-5 package?
In the SOT23-5 package, MAX4646EUT+T has a maximum continuous power dissipation of 571mW at +70°C ambient, derating linearly at 7.1mW/°C above that temperature. Junction-to-ambient thermal resistance (θJA) is approximately 141°C/W. This allows reliable operation at full rated current (±50mA) within the -40°C to +85°C case temperature range, provided PCB copper area meets JEDEC standards for SOT23 thermal relief.
MAX4646EUT+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- 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-6
MAX4646EUT+T FAQ
1.How can I place an order for MAX4646EUT+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4646EUT+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 MAX4646EUT+T reliable?
The price and inventory of MAX4646EUT+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4646EUT+T is usually 5 days.
3.What payment methods are accepted for MAX4646EUT+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4646EUT+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4646EUT+T?
MAX4646EUT+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4646EUT+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 MAX4646EUT+T?
For technical support, including MAX4646EUT+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4646EUT+T requirements.
6.How does Aetrix verify that MAX4646EUT+T is sourced from the original manufacturer or authorized distributors?
All MAX4646EUT+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 MAX4646EUT+T meets industry standards.
7.What is the process for return or replacement of MAX4646EUT+T?
All MAX4646EUT+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4646EUT+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 MAX4646EUT+T part is unused and in its original packaging.
Return procedure for MAX4646EUT+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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