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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:1,071
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Product details
Overview
MAX4749EUD from Maxim Integrated is a low-voltage, dual SPST-NO / dual SPST-NC analog switch IC operating from +2V to +11V, featuring 50Ω (max) on-resistance at +3V, 3.5Ω (max) channel-to-channel RON matching, and <0.1nA leakage at +25°C. It enables precise signal routing in compact battery-powered instrumentation such as glucose meters and portable audio interfaces.
For engineers reviewing the MAX4749EUD datasheet, MAX4749EUD pinout, MAX4749EUD application, or MAX4749EUD equivalent, this page delivers verified electrical specs, TSSOP-14 package layout, real-world use cases in medical and communications systems, and two validated alternative parts with documented functional and interface differences.
Technical Context
The MAX4749EUD integrates two normally open (NO) and two normally closed (NC) single-pole single-throw switches in one monolithic CMOS die, supporting bidirectional rail-to-rail analog signal handling up to V+ without distortion. Its break-before-make timing is guaranteed at 1ns (typ), preventing momentary shorting during state transitions.
Logic inputs are TTL/CMOS-compatible across supply voltages; at +3V, VIH = +2.0V and VIL = +0.8V. The device consumes only 0.5nW (typ) quiescent power and exhibits -72dB off-isolation and -84dB crosstalk at 1MHz - critical for high-fidelity A/V routing and low-noise data acquisition.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.0V to +11V - supports single-supply operation in Li-ion, 3.3V, and 5V systems without level shifters |
| On-Resistance (RON) | 50Ω (max) at +3V - ensures minimal signal attenuation and gain error in precision sensor front-ends |
| RON Matching | 3.5Ω (max) at +3V - maintains channel balance in differential or multi-path signal conditioning |
| Leakage Current | <0.1nA at +25°C - preserves accuracy in high-impedance pH or biosensor circuits |
| Off-Isolation | -72dB at 1MHz - suppresses coupling between inactive channels in multiplexed AFEs |
| Crosstalk | -84dB at 1MHz - prevents interference between adjacent audio or communication paths |
| Turn-On/Off Time | 170ns / 70ns (max) at +3V - enables fast switching in time-division multiplexing and auto-ranging systems |
Pinout & Package
MAX4749EUD is supplied in a 14-pin TSSOP package (lead-free, RoHS-compliant), with exposed pad not present. Pin 1 is located at the top-left corner when the notch faces upward. All pins are electrically defined per the MAX4749-specific truth table and configuration.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | V+ | Positive supply input for analog and digital sections; must be bypassed with ≥0.1µF capacitor near pin |
| 2, 4, 9, 10 | COM1–COM4 | Common terminals - bidirectional signal path junctions shared by NO/NC pairs |
| 3, 11 | NC2, NC4 | Normally closed analog outputs - conduct to COM when IN = LOW |
| 5, 6, 12, 13 | IN1–IN4 | Digital control inputs - TTL/CMOS-compatible; drive to GND or V+ for reliable switching |
| 7 | GND | Digital ground reference - must connect to system ground plane with low-inductance path |
| 8 | NO3 | Normally open analog output - conducts to COM3 only when IN3 = HIGH |
| 14 | NO1 | Normally open analog output - conducts to COM1 only when IN1 = HIGH |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail signal handling | Analog signals from GND to V+ pass unclipped - eliminates need for external biasing in ±0.5V to ±5V input ranges |
| Break-before-make switching | Guaranteed 1ns minimum interval prevents short-through during IN transition - essential for safe reconfiguration of sensor inputs |
| Ultra-low quiescent power | 0.5nW typical supply current - extends battery life in always-on wearable health monitors |
| Low charge injection | 7pC (typ) - minimizes voltage glitch on high-impedance nodes like ADC sample capacitors |
| Small footprint TSSOP-14 | 5.0mm × 4.4mm body - fits dense PCB layouts in handheld diagnostics and telecom modules |
Applications
| Glucose Monitoring Systems | Portable Audio Signal Routing |
|---|---|
Use Scenario: Multiplexing multiple electrochemical sensor electrodes to a single low-power ADC in a handheld glucometer. IC Role / Device Role / Timing Role: Dual NO/NC switch isolates active electrode while grounding unused ones to reduce noise and cross-talk. Use Value: 0.1nA leakage ensures stable baseline readings; 50Ω RON avoids gain error in transimpedance amplifier feedback paths. |
Use Scenario: Selecting between microphone inputs and line-level sources in a Bluetooth headset with adaptive ANC. IC Role / Device Role / Timing Role: Bidirectional analog switch routes AC-coupled audio signals without DC bias disruption. Use Value: -84dB crosstalk prevents audible bleed between mic and speaker paths; rail-to-rail support handles ±1Vpk signals directly. |
| Low-Voltage Data Acquisition | Cell Phone Peripheral Interface |
Use Scenario: Configuring programmable gain and filter paths in an industrial IoT temperature logger using thermistor and RTD inputs. IC Role / Device Role / Timing Role: SPST-NO/NC pair selects between sensor types while maintaining matched RON for calibration consistency. Use Value: 3.5Ω RON matching ensures identical channel gain error; 170ns tON enables sub-millisecond channel scanning. |
Use Scenario: Sharing a single USB-C CC logic analyzer circuit between USB2.0 D+/D- and sideband use cases in smartphone test mode. IC Role / Device Role / Timing Role: Low-leakage switch isolates debug lines during normal operation and connects them only during factory testing. Use Value: <0.1nA leakage prevents false CC detection; 2V min supply allows direct connection to battery-backed test rails. |
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); otherwise identical RON, leakage, and timing specs | Suitable only where all switched paths require default-closed behavior (e.g., fail-safe sensor disconnect) | Select MAX4748EUD+ only if system logic requires active-low enable and no NO paths are needed |
| ADG1419BRUZ | Single SPDT switch (not quad); 4.7Ω RON at +5V; higher 150pA leakage; requires dual supply or level-shifter for +3V logic | Used in high-precision lab equipment where SPDT topology and lower RON outweigh channel count needs | Choose ADG1419BRUZ when SPDT function and sub-5Ω RON are mandatory, and board space permits discrete implementation |
Compared with MAX4749EUD, MAX4748EUD+ offers identical performance but lacks NO functionality, limiting flexibility in mixed-signal routing; ADG1419BRUZ provides superior RON and bandwidth but sacrifices channel density and single-supply simplicity - making MAX4749EUD optimal for compact, battery-operated multi-channel systems requiring both NO and NC states.
Availability
MAX4749EUD is available at Aetrix Electronics and suitable for glucose meters, portable audio interfaces, low-voltage data-acquisition systems, and cell phone peripheral interfaces requiring stable component supply across industrial and medical production cycles.
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, mixed-signal, and power-management ICs for demanding industrial, medical, and communications applications.
The MAX4747–MAX4750 family was engineered specifically for ultra-low-power, rail-to-rail analog switching in space-constrained portable instrumentation - emphasizing leakage control, supply flexibility, and robust signal integrity.
FAQ
What is the maximum supply voltage rating 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 internal oxide breakdown limits; sustained use at +12V is not advised. The MAX4749EUD datasheet specifies +11V as the upper limit for guaranteed parametric performance and reliability over temperature.
Does MAX4749EUD support rail-to-rail analog signal switching?
Yes, MAX4749EUD supports true rail-to-rail analog signal switching - signals from GND to V+ pass through the switch channels with minimal distortion or clipping. This capability is confirmed in the Electrical Characteristics tables and Typical Operating Characteristics plots (e.g., RON vs. VCOM), and applies across the full +2V to +11V supply range.
What is the logic compatibility of MAX4749EUD at +3V supply?
At +3V supply, MAX4749EUD is fully TTL-compatible: VIH = +2.0V (min) and VIL = +0.8V (max). Input leakage remains below ±1µA, and no external level shifting is required. Driving INx pins directly to GND or V+ ensures lowest power consumption and fastest switching - a key advantage for battery-powered designs using MAX4749EUD.
How does the break-before-make timing work in MAX4749EUD?
MAX4749EUD guarantees a minimum 1ns break-before-make (BBM) interval during INx transitions, preventing momentary shorting between NO and NC paths on the same COM terminal. This is measured under standard load conditions (RL = 300Ω, CL = 35pF) and ensures safe reconfiguration in sensor multiplexing or fault-tolerant signal paths - a feature explicitly specified for MAX4749EUD and MAX4750 only.
Can MAX4749EUD be used in medical-grade glucose meters?
Yes, MAX4749EUD is deployed in certified glucose meters due to its <0.1nA leakage at +25°C, 50Ω RON stability over signal range, and guaranteed performance from -40°C to +85°C. Its low charge injection (7pC) and rail-to-rail operation preserve accuracy in electrochemical current measurement - critical for ISO 15197-compliant devices using MAX4749EUD in analog front-end switching.
MAX4749EUD Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Bulk
- 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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