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Analog Devices Inc./Maxim Integrated MAX4646EUA+T
- Part No.:
- MAX4646EUA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX4646EUA+T.pdf
- Description:
- IC SWITCH SPST-NCX1 2.5OHM 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:3,404
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Product details
Overview
The MAX4646EUA+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, rail-to-rail signal handling capability, and 8ns turn-off time-designed for precision low-voltage signal routing in battery-powered instrumentation and audio paths.
For engineers reviewing the MAX4646EUA+T datasheet, MAX4646EUA+T pinout, MAX4646EUA+T application, or MAX4646EUA+T equivalent, this device offers verified low leakage (±0.25nA at +25°C), guaranteed RON flatness (0.4Ω max), -75dB off-isolation at 1MHz, and TTL/CMOS logic compatibility in a compact 8-pin µMAX package.
Technical Context
The MAX4646EUA+T implements a fully complementary CMOS transmission gate architecture enabling true rail-to-rail analog conduction from GND to V+ (1.8V–5.5V). Its NC configuration ensures default continuity without control voltage, critical for fail-safe signal paths in data acquisition and sample-and-hold circuits.
Switching dynamics are optimized via matched P/N channel sizing: tON = 12ns and tOFF = 8ns (V+ = 5V, CL = 35pF) with charge injection limited to 5pC-enabling sub-0.014% THD in 20Hz–20kHz audio applications and minimal settling error in precision ADC front-ends.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-resistance (RON) | 2.5Ω typical at +5V - enables <1mV drop at 10mA signal current, preserving accuracy in low-level sensor interfaces |
| RON flatness | 0.4Ω maximum - ensures consistent gain and linearity across full 0V to V+ analog range |
| Off-isolation | -75dB at 1MHz - suppresses crosstalk between adjacent channels in multiplexed systems |
| Turn-off time (tOFF) | 8ns typical - supports >50MHz switching rates in high-speed test equipment and communications routing |
| Off-leakage current | ±0.25nA max at +25°C - prevents DC error accumulation in high-impedance sample-and-hold capacitors |
| Supply voltage range | +1.8V to +5.5V - allows direct integration into Li-ion (3.0–3.7V) and USB-powered (5V) systems without regulation |
| Total harmonic distortion | 0.014% typical - maintains fidelity in audio signal paths up to 20kHz with 600Ω load |
Pinout & Package
MAX4646EUA+T is housed in an 8-pin µMAX package (3.05mm × 3.05mm × 0.8mm), thermally enhanced with internal die attach but no exposed paddle. Pin 1 is marked by a dot or notch; pin numbering follows standard µMAX convention (counterclockwise from top-left corner).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Logic control input | Inverts NC behavior: logic low = switch closed (COM–NC path conductive); compatible with 1.8V/3.3V/5V logic |
| 2 (N.C.) | No internal connection | Unused terminal; must be left floating or tied to GND/V+ per layout best practice-no electrical function |
| 3 (N.C.) | No internal connection | Unused terminal; electrically isolated from die-no decoupling or routing required |
| 4 (V+) | Positive supply | Single power rail supporting 1.8V–5.5V operation; bypassing with 0.1µF to GND reduces supply noise coupling |
| 5 (NO) | Normally open terminal | Remains open unless IN = high; provides isolation path when MAX4646EUA+T is active-high gated |
| 6 (GND) | Analog/digital ground | Common reference for all signals and supply; requires low-impedance connection to system ground plane |
| 7 (NC) | Normally closed terminal | Default-conductive path to COM when IN = low; carries full analog signal current up to ±50mA continuous |
| 8 (COM) | Common analog terminal | Signal hub connecting to either NC (default) or NO (when enabled); supports rail-to-rail voltage swing (0V to V+) |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail analog operation | Signals from GND to V+ pass unclamped-eliminates level-shifting in mixed-supply systems |
| TTL/CMOS logic compatibility | VIL ≤ 0.8V and VIH ≥ 2.4V at +5V supply-ensures robust interfacing with microcontrollers and FPGAs |
| Low charge injection (5pC) | Minimizes voltage glitch on hold capacitors-critical for <16-bit ADC sample-and-hold accuracy |
| Guaranteed RON flatness | 0.4Ω max variation over full signal range-preserves amplitude consistency in variable-gain amplifier paths |
| Ultra-low off-leakage | ±0.25nA max at +25°C-prevents drift in high-Z sensor buffers and piezoelectric transducer interfaces |
Applications
| Battery-Powered Data Loggers | Audio Signal Routing |
|---|---|
Use Scenario: Multiplexing thermocouple, RTD, and strain gauge inputs into a single 24-bit ΣΔ ADC under 3.3V Li-ion power. IC Role / Device Role / Timing Role: NC switch isolates unused sensors while maintaining bias continuity; fast 8ns tOFF enables 100kSPS channel scanning. Use Value: 2.5Ω RON introduces <0.025% gain error at 10mA excitation; 0.25nA leakage avoids >1µV offset drift over 24-hour logging cycles. |
Use Scenario: Selecting between microphone preamp outputs and line-in sources before a stereo DAC in portable audio gear. IC Role / Device Role / Timing Role: Fail-safe NC path ensures default mic input; CMOS switch preserves 20Hz–20kHz bandwidth with 0.014% THD. Use Value: -75dB off-isolation prevents audible crosstalk between sources; rail-to-rail swing handles ±1.5Vpp line signals without clipping. |
| Low-Voltage Communications Circuits | Relay Replacement in Test Equipment |
Use Scenario: Routing RS-232/RS-485 enable lines and UART debug signals in space-constrained IoT edge nodes powered by 1.8V LDOs. IC Role / Device Role / Timing Role: SPST switch gates control lines with 12ns tON, synchronizing with MCU GPIO toggling at 10MHz. Use Value: 1.8V operation eliminates level translators; 30Ω RON at 1.8V still delivers <10ns propagation delay into 10kΩ loads. |
Use Scenario: Replacing electromechanical relays in automated test fixtures requiring 1M+ actuation cycles and <100ns timing resolution. IC Role / Device Role / Timing Role: NC configuration maintains DUT power path during controller boot; solid-state switching enables 100kHz reconfiguration. Use Value: 50mA continuous rating supports 24V/100mA DUT supplies; 0.4Ω RON flatness ensures stable contact resistance vs. signal voltage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SPST analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4645EUA+T | Normally open (NO) configuration; identical RON, timing, and leakage specs | Requires active-high enable for signal path closure-suitable where default-open safety is mandated | Select MAX4645EUA+T when fail-open behavior is required; pinout and footprint are identical to MAX4646EUA+T |
| ADG849BRMZ-REEL | 2.8Ω RON at 5V; 10ns tOFF; -65dB off-isolation; operates down to +1.65V | Slightly higher RON and lower isolation-acceptable in non-critical audio routing but marginal for precision DAQ | Choose ADG849BRMZ-REEL only if 1.65V minimum supply is mandatory; verify 0.4Ω RON flatness meets system linearity requirements |
Compared with MAX4645EUA+T (NO variant) and ADG849BRMZ-REEL (lower-voltage alternative), the MAX4646EUA+T uniquely combines fail-safe NC operation, industry-leading 0.4Ω RON flatness, and -75dB off-isolation-making it optimal for high-fidelity signal routing where default continuity and minimal distortion are essential.
Availability
MAX4646EUA+T is available at Aetrix Electronics and suitable for battery-powered systems, audio signal routing, low-voltage data-acquisition systems, and relay replacement applications requiring stable component supply across industrial temperature ranges (-40°C to +85°C).
Supply support for MAX4646EUA+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-with emphasis on high reliability and low-power innovation.
The MAX4645/MAX4646 family targets low-voltage, low-distortion analog switching in space-constrained portable and test equipment, prioritizing rail-to-rail operation, nanosecond timing, and ultra-low leakage over cost-driven general-purpose switching.
FAQ
What is the absolute maximum supply voltage rating for the MAX4646EUA+T?
The MAX4646EUA+T has an absolute maximum supply voltage (V+) of +6V. Operation beyond this limit-even momentarily-may cause permanent damage. The recommended operating range is +1.8V to +5.5V, and the device is fully specified at +5V (4.5V–5.5V) and +3V (2.7V–3.3V) supplies. Always observe the -0.3V to +6V rating on V+, and ensure COM/NO/NC terminals stay within -0.3V to (V+ + 0.3V) relative to GND.
Does the MAX4646EUA+T require external protection diodes for overvoltage conditions?
The MAX4646EUA+T does not require external protection diodes under normal operation, but they are recommended if analog signals may exceed V+ or fall below GND. Two series signal diodes (e.g., BAT54) on V+ and GND pins clamp overvoltage transients while preserving the device's 2.5Ω RON and 0.25nA leakage performance. This protection reduces the usable analog range by one diode drop above GND and below V+, but does not affect switching speed or logic compatibility.
How does the MAX4646EUA+T behave when the IN pin is left unconnected?
When the IN pin of the MAX4646EUA+T is left unconnected (floating), its internal CMOS input structure lacks a defined logic state, causing unpredictable switching behavior. The device may oscillate or settle in either ON or OFF state depending on noise and parasitic coupling. To ensure reliable NC operation, tie IN to GND for default closure or to V+ for forced opening. A pull-down resistor (e.g., 100kΩ to GND) is preferred for fail-safe default-closed functionality.
Can the MAX4646EUA+T switch AC signals centered at mid-supply without distortion?
Yes-the MAX4646EUA+T supports true rail-to-rail analog signals, meaning it can pass AC waveforms centered at any DC bias between GND and V+ without clipping or distortion. Its CMOS transmission gate design maintains symmetrical on-resistance across the full voltage range, and the specified 0.014% THD at 20Hz–20kHz applies to signals with 0V to V+ common-mode swing. For bipolar AC signals, use a split supply or level-shift circuit to map the waveform into the 0V–V+ window.
Is the 8-pin µMAX package of the MAX4646EUA+T RoHS-compliant and lead-free?
Yes, the MAX4646EUA+T in the 8-pin µMAX package is RoHS-compliant and lead-free, meeting JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1) requirements. The package uses matte tin (Sn) termination with no lead content, and the device is rated for reflow soldering per IPC/JEDEC J-STD-020. Full compliance documentation-including substance declarations and test reports-is available through Analog Devices' product change notifications (PCNs) for the MAX4646EUA+T.
MAX4646EUA+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:
- 8-uMAX/uSOP
MAX4646EUA+T FAQ
1.How can I place an order for MAX4646EUA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4646EUA+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 MAX4646EUA+T reliable?
The price and inventory of MAX4646EUA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4646EUA+T is usually 5 days.
3.What payment methods are accepted for MAX4646EUA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4646EUA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4646EUA+T?
MAX4646EUA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4646EUA+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 MAX4646EUA+T?
For technical support, including MAX4646EUA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4646EUA+T requirements.
6.How does Aetrix verify that MAX4646EUA+T is sourced from the original manufacturer or authorized distributors?
All MAX4646EUA+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 MAX4646EUA+T meets industry standards.
7.What is the process for return or replacement of MAX4646EUA+T?
All MAX4646EUA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4646EUA+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 MAX4646EUA+T part is unused and in its original packaging.
Return procedure for MAX4646EUA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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