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Analog Devices Inc./Maxim Integrated MAX4749EUD+
- Part No.:
- MAX4749EUD+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
MAX4749EUD+.pdf
- Description:
- IC SW SPST-NO/NCX4 25OHM 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,326
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Product details
Overview
MAX4749EUD+ from Maxim Integrated is a low-voltage, dual SPST analog switch with two normally open (NO) and two normally closed (NC) channels in a 14-pin TSSOP package. It operates from +2V to +11V, delivers ≤50Ω on-resistance at +3V, ≤25Ω at +5V, and guarantees <0.1nA leakage at +25°C-enabling precision signal routing in battery-powered glucose meters and portable audio systems.
For engineers reviewing the MAX4749EUD+ datasheet, MAX4749EUD+ pinout, MAX4749EUD+ application, or MAX4749EUD+ equivalent, this page provides verified circuit role, rail-to-rail signal handling capability, break-before-make timing (1ns), on-resistance matching (≤3.5Ω at +3V), and WLP/TSSOP/TQFN package mapping for immediate layout and selection decisions.
Technical Context
The MAX4749EUD+ implements a CMOS-based dual-configuration SPST architecture: two independent NO switches (IN1/IN2 control COM1/NO1 and COM2/NO2) and two independent NC switches (same IN1/IN2 control COM1/NC1 and COM2/NC2). Its logic inputs are TTL/CMOS-compatible across supply voltages, and internal protection diodes enable robust overvoltage tolerance up to V+ + 0.3V.
It features guaranteed break-before-make operation (tBBM ≤1ns at +3V/+5V), rail-to-rail analog signal handling (0V to V+), and low charge injection (7–9pC) - critical for maintaining signal integrity in data-acquisition front-ends and audio channel switching where glitch-free transitions are mandatory.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.0V to +11V single supply - supports direct integration into 3.3V, 5V, and higher-voltage portable systems without level-shifting. |
| On-Resistance (RON) | ≤50Ω max at +3V - ensures minimal signal attenuation and voltage drop in low-power sensor interfaces. |
| On-Resistance Matching | ≤3.5Ω max at +3V - enables matched gain/attenuation across dual-channel paths in differential or stereo applications. |
| Leakage Current | <0.1nA at TA = +25°C - preserves accuracy in high-impedance medical sensor nodes (e.g., glucose meter electrodes). |
| Off-Isolation | −72dB at 1MHz - suppresses crosstalk between inactive channels in multi-signal routing (e.g., A/V multiplexing). |
| Turn-On/Off Time | 170ns / 70ns max at +3V - supports fast-switching data acquisition at ≥1MHz sampling rates. |
| Break-Before-Make | ≤1ns - prevents momentary short-circuit during channel transition in power-sensitive analog paths. |
Pinout & Package
MAX4749EUD+ uses a 14-pin TSSOP package (U14+1, outline 21-0066) with exposed leadframe and RoHS-compliant finish. Pin 1 is V+, pin 7 is GND, and pins 13/5/6/12 serve as digital control inputs IN1–IN4. Analog terminals include COM1/COM2 (pins 2/9), NO1/NO3 (pins 1/8), and NC2/NC4 (pins 4/11).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1, 8 | NO1, NO3 | Normally open analog outputs - connect only when corresponding IN1/IN3 is HIGH; used for selective signal path activation. |
| 2, 9 | COM1, COM2 | Common analog I/O terminals - bidirectional; serve as shared input/output junctions for NO/NC switching. |
| 4, 11 | NC1, NC2 | Normally closed analog outputs - conduct when IN1/IN2 is LOW; provide default-path continuity in fail-safe designs. |
| 13, 5, 6, 12 | IN1–IN4 | Digital control inputs - TTL/CMOS-compatible; drive NO/NC states independently per channel pair. |
| 7 | GND | Digital ground reference - must be tied to system digital ground plane to ensure logic threshold stability. |
| 14 | V+ | Single positive supply - powers analog and digital sections; requires local 0.1µF bypass capacitor for >+5V operation. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail signal handling | Analog signals from 0V to V+ pass unclamped - eliminates external biasing in single-supply sensor front-ends. |
| Break-before-make timing | tBBM ≤1ns ensures no overlap between NO and NC conduction - prevents short-through in dual-path configurations. |
| Ultra-low quiescent power | 0.5nW typical supply current - extends battery life in always-on medical wearables and handheld diagnostics. |
| Low charge injection | 7pC typical - minimizes voltage glitches on high-impedance nodes (e.g., ADC sample capacitors). |
| High off-isolation | −72dB at 1MHz - isolates unused signal paths in multi-channel audio routing without external filtering. |
Applications
| Glucose Monitoring Systems | Portable Audio Signal Routing |
|---|---|
Use Scenario: Multiplexing electrochemical sensor electrodes to a single ADC in handheld glucose meters. IC Role / Device Role / Timing Role: Dual SPST switch isolating reference/working electrodes while maintaining rail-to-rail analog fidelity and sub-1ns break-before-make timing. Use Value: Enables precise low-leakage (<0.1nA) signal selection without introducing offset or crosstalk, directly supporting ISO 15197 accuracy requirements. |
Use Scenario: Routing microphone inputs and headphone outputs in compact Bluetooth headsets. IC Role / Device Role / Timing Role: Configurable NO/NC switching for mic mute, speaker swap, or jack detection with <50Ω RON at 3.3V. Use Value: Delivers flat frequency response (250MHz bandwidth) and −84dB crosstalk - preserving audio clarity across stereo channels. |
| Low-Voltage Data Acquisition | Cell Phone Peripheral Switching |
Use Scenario: Channel selection in 12-bit portable data loggers powered by coin-cell batteries. IC Role / Device Role / Timing Role: Low-power analog multiplexer with 0.5nW quiescent draw and 170ns turn-on time for burst-mode sampling. Use Value: Extends operational lifetime beyond 1 year on CR2032 while maintaining ≤3.5Ω RON matching for calibrated multi-channel gain consistency. |
Use Scenario: Switching between earpiece, loudspeaker, and headset outputs in GSM/WCDMA handsets. IC Role / Device Role / Timing Role: Dual-path SPST switch managing audio path topology under baseband processor control. Use Value: Supports simultaneous 3.3V logic control and 0–3.3V analog swing - eliminating level shifters and reducing BOM count. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4748EUD+ | Four NC-only SPST switches (no NO functionality); identical RON, leakage, and timing specs. | Suitable only where default-closed signal paths are required (e.g., safety interlocks), not for mixed NO/NC topologies. | Select MAX4749EUD+ when dual-path redundancy or fail-open/fail-closed flexibility is needed. |
| ADG719BRMZ | Single SPDT, 4Ω RON at +3V, −76dB off-isolation, but lacks break-before-make guarantee and NO/NC dual configuration. | Applicable for simple single-pole routing only; cannot replicate MAX4749EUD+'s independent dual NO/NC channel control. | Choose MAX4749EUD+ for systems requiring coordinated switching of complementary signal paths without external logic. |
Compared with MAX4748EUD+ (NC-only) and ADG719BRMZ (single SPDT), MAX4749EUD+ uniquely delivers integrated dual NO/NC functionality in one 14-pin TSSOP - reducing PCB area and eliminating discrete OR-gate logic needed to synthesize equivalent behavior.
Availability
MAX4749EUD+ is available at Aetrix Electronics and suitable for battery-powered systems, portable medical devices, and low-voltage data-acquisition systems requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for MAX4749EUD+ 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 demanding industrial, medical, and communications applications.
The MAX4747–MAX4750 family targets ultra-low-power, rail-to-rail analog switching in space-constrained portable equipment - emphasizing leakage control, supply flexibility, and guaranteed dynamic timing for reliable signal path management.
FAQ
What is the maximum supply voltage for MAX4749EUD+?
The absolute maximum supply voltage for MAX4749EUD+ is +12V referenced to GND, but the recommended operating range is +2.0V to +11V. Operation above +11V risks exceeding safe power dissipation limits and may degrade long-term reliability. For +11V use, a minimum 0.1µF bypass capacitor must be placed adjacent to the V+ pin.
Does MAX4749EUD+ support rail-to-rail analog signal switching?
Yes, MAX4749EUD+ supports true rail-to-rail analog signal handling from 0V to V+ across all channels. This is enabled by its CMOS process and internal level-shifting design, allowing unclamped passage of signals spanning the full supply range - essential for single-supply sensor interfaces and audio circuits.
What is the function of pins 3, 5, 10, and 12 on MAX4749EUD+?
Pins 3, 5, 10, and 12 on MAX4749EUD+ are no-connect (N.C.) terminals. They are not internally bonded and must remain unconnected in the PCB layout. These pins exist for mechanical symmetry and package compatibility across the MAX4747–MAX4750 family but carry no electrical function in the MAX4749EUD+ device.
How does the break-before-make feature work in MAX4749EUD+?
MAX4749EUD+ guarantees break-before-make timing of ≤1ns during transitions between NO and NC states on the same COM terminal. This prevents momentary short-circuiting of analog paths - critical in applications like audio muting or sensor calibration where overlapping conduction could inject error or damage downstream circuitry.
Can MAX4749EUD+ be used with a 1.8V logic supply?
No - MAX4749EUD+ logic inputs require VIH ≥ +2.0V and VIL ≤ +0.8V, making it incompatible with 1.8V logic families. It is TTL/CMOS-compatible only when powered from ≥+3V supplies, where input thresholds scale with V+. For 1.8V systems, level-shifting circuitry or a different switch (e.g., MAX14661) is required.
MAX4749EUD+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Active
- Switch Circuit:
- SPST - NO/NC
- Multiplexer/Demultiplexer Circuit:
- 1:1
- Number of Circuits:
- 4
- On-State Resistance (Max):
- 25Ohm
- Channel-to-Channel Matching (ΔRon):
- 100mOhm
- Voltage - Supply, Single (V+):
- 2V ~ 11V
- Voltage - Supply, Dual (V±):
- -
- Switch Time (Ton, Toff) (Max):
- 85ns, 45ns
- -3db Bandwidth:
- 250MHz
- Charge Injection:
- 9pC
- Channel Capacitance (CS(off), CD(off)):
- 20pF, 20pF
- Current - Leakage (IS(off)) (Max):
- 100pA
- Crosstalk:
- -84dB @ 1MHz
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP
MAX4749EUD+ FAQ
1.How can I place an order for MAX4749EUD+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4749EUD+ 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 MAX4749EUD+ reliable?
The price and inventory of MAX4749EUD+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4749EUD+ is usually 5 days.
3.What payment methods are accepted for MAX4749EUD+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4749EUD+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4749EUD+?
MAX4749EUD+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4749EUD+ 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 MAX4749EUD+?
For technical support, including MAX4749EUD+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4749EUD+ requirements.
6.How does Aetrix verify that MAX4749EUD+ is sourced from the original manufacturer or authorized distributors?
All MAX4749EUD+ 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 MAX4749EUD+ meets industry standards.
7.What is the process for return or replacement of MAX4749EUD+?
All MAX4749EUD+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX4749EUD+, 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 MAX4749EUD+ part is unused and in its original packaging.
Return procedure for MAX4749EUD+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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