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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:3,688
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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 with 2.5Ω typical on-resistance at +5V supply, ±0.25nA max off-leakage at +25°C, and rail-to-rail signal handling capability. It operates from +1.8V to +5V, delivers 12ns turn-on/8ns turn-off times, and is packaged in 5-pin SOT23 for compact audio routing and low-voltage data-acquisition systems.
For engineers reviewing the MAX4646EUT-T datasheet, MAX4646EUT-T pinout, MAX4646EUT-T application, or MAX4646EUT-T equivalent, this page provides verified electrical parameters, thermal performance across –40°C to +85°C, package-specific layout guidance, and validated alternative options for relay replacement and sample-and-hold circuits.
Technical Context
The MAX4646EUT-T implements a CMOS transmission-gate architecture optimized for low RON flatness (0.4Ω max) over full signal range (GND to V+), enabling high-fidelity analog switching without distortion. Its logic input is TTL/CMOS-compatible with VIH = 2.4V and VIL = 0.8V at +5V supply, and internal protection diodes clamp signals beyond V+ or GND.
Designed as a direct NC counterpart to the NO MAX4645, it features guaranteed leakage currents tested at +85°C and correlated to +25°C, charge injection of 5pC (VGEN = 2V), and –75dB off-isolation at 1MHz - all specified under production-tested conditions in SOT23-5 packaging.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-resistance (RON) | 2.5Ω typical at +5V; ensures minimal voltage drop and power loss in signal paths up to ±50mA continuous current. |
| On-resistance flatness | 0.4Ω max over full signal range; maintains consistent gain and linearity for precision instrumentation inputs. |
| Turn-on / turn-off time | 12ns / 8ns typical at +25°C; supports high-speed multiplexing in data-acquisition and communications circuits. |
| Off-leakage current | ±0.25nA max at +25°C; preserves signal integrity in high-impedance sample-and-hold and sensor front-ends. |
| Rail-to-rail operation | Supports analog signals from GND to V+; eliminates level-shifting requirements in battery-powered systems. |
| Supply voltage range | +1.8V to +5V single supply; enables direct integration into 1.8V microcontroller I/O domains and legacy 5V systems. |
| Total harmonic distortion | 0.014% typical at 20Hz–20kHz; meets fidelity requirements for audio routing and measurement-grade signal chains. |
Pinout & Package
MAX4646EUT-T 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 device edge; pin 5 is the positive supply (V+).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | IN | Logic control input: low = ON (closed), high = OFF (open); TTL/CMOS-compatible thresholds. |
| 2 | COM | Analog common terminal: bidirectional path between NO/NC and external circuitry. |
| 3 | GND | Ground reference for logic and analog sections; must be low-impedance for low-noise operation. |
| 4 | NC | Normally closed analog terminal: connected to COM when IN = low; open when IN = high. |
| 5 | V+ | Positive supply: powers internal CMOS switches and logic; bypass with 0.1µF capacitor to GND. |
Key Features
| Feature | Design Value |
|---|---|
| Low RON flatness | 0.4Ω max ensures <0.02% gain error across full signal swing in precision ADC front-ends. |
| Rail-to-rail analog support | Enables direct interfacing with op-amps and sensors operating at GND or V+ without clamping or distortion. |
| Guaranteed leakage performance | ±0.25nA max off-leakage at +25°C prevents DC offset drift in high-Z sample-and-hold capacitors. |
| Fast switching with low charge injection | 5pC charge injection minimizes voltage glitch on hold capacitors during switching transitions. |
| Single-supply flexibility | +1.8V operation allows use with modern ultra-low-power MCUs while maintaining 2.5Ω RON at higher voltages. |
Applications
| Battery-Powered Systems | Audio Signal Routing |
|---|---|
|
Use Scenario: Power-path selection in portable medical monitors with dual Li-ion cells and 3.3V system rails. IC Role / Device Role / Timing Role: NC switch isolates backup battery during main-cell operation; fast tOFF ensures seamless switchover. Use Value: 2.5Ω RON limits voltage drop to <83mV at 33mA load, preserving runtime and regulation accuracy. |
Use Scenario: Input multiplexing in USB-C audio dongles supporting analog mic and line-in sources. IC Role / Device Role / Timing Role: SPST NC switch routes mic bias to electret capsule only when active; avoids crosstalk. Use Value: –75dB off-isolation at 1MHz suppresses RF ingress and prevents audible switching pop. |
| Low-Voltage Data Acquisition | Sample-and-Hold Circuits |
|
Use Scenario: Channel selection in 16-bit SAR ADC front-end with ±10V input range and 1MΩ input impedance. IC Role / Device Role / Timing Role: NC configuration enables default connection to calibration reference; breaks only during channel scan. Use Value: 0.4Ω RON flatness contributes <0.0025% nonlinearity error across full input span. |
Use Scenario: Hold capacitor charging path in precision integrator-based energy meters. IC Role / Device Role / Timing Role: NC switch connects integrator output to hold cap during acquisition phase; opens for integration. Use Value: 5pC charge injection limits hold-step error to <5µV on 1nF capacitor, meeting Class 0.2 accuracy. |
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, leakage, timing, and package. | Used where default-open state is required (e.g., safety-critical disconnect). | Select MAX4645EUT-T when system logic demands default isolation rather than default conduction. |
| ADG849BCPZ-REEL7 | 2.8Ω RON at +5V; 0.5Ω flatness; –72dB off-isolation; 5-pin SC70 package (smaller footprint). | Higher bandwidth (200MHz) but higher charge injection (12pC); suited for RF sampling, not precision hold. | Choose ADG849BCPZ-REEL7 only if board space is constrained and RF performance outweighs THD/leakage needs. |
Compared with MAX4646EUT-T, the MAX4645EUT-T offers functional symmetry with inverted logic state, while the ADG849BCPZ-REEL7 trades lower leakage and distortion for higher bandwidth and smaller size - making MAX4646EUT-T optimal for precision, low-leakage, rail-to-rail analog control in industrial and medical systems.
Availability
MAX4646EUT-T is available at Aetrix Electronics and suitable for battery-powered systems, audio signal routing, and low-voltage data-acquisition systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.
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 precision analog, mixed-signal, and power-management ICs for industrial, medical, and communications applications.
The MAX4645/MAX4646 product line targets low-distortion, low-voltage analog switching in space-constrained, battery-operated equipment - emphasizing rail-to-rail signal handling, nanoscale leakage control, and robust single-supply operation.
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 closed; when IN is logic high (≥2.4V), the path opens. This behavior is confirmed in the truth table and functional diagrams of the MAX4646EUT-T datasheet, and differs from the NO MAX4645EUT-T.
Does MAX4646EUT-T support rail-to-rail analog signals?
Yes, MAX4646EUT-T supports rail-to-rail analog signals from GND to V+, as explicitly stated in the General Description and Electrical Characteristics tables. This capability is enabled by its CMOS transmission-gate design and is validated across the full –40°C to +85°C operating temperature range.
What is the maximum continuous current rating for MAX4646EUT-T?
The MAX4646EUT-T supports ±50mA continuous current on any terminal (COM, NC, or IN), per Absolute Maximum Ratings. This limit applies across the full operating temperature range and is independent of supply voltage within +1.8V to +5V.
Is MAX4646EUT-T pin-compatible with other packages in the MAX4645/MAX4646 family?
No - MAX4646EUT-T uses the 5-pin SOT23 package, while MAX4646EUK-T uses 6-pin SOT23 and MAX4646EUA uses 8-pin µMAX. Pin counts, layouts, and terminal assignments differ; no pin-to-pin compatibility exists between these variants. Layout redesign is required when changing packages.
What is the charge injection specification for MAX4646EUT-T?
The MAX4646EUT-T exhibits 5pC typical charge injection at VGEN = 2V, CL = 1.0nF, and RGEN = 0Ω, as measured per Figure 3 in the datasheet. This value is confirmed at +25°C and directly impacts hold-capacitor settling in sample-and-hold applications.
MAX4646EUT-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-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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