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Analog Devices Inc./Maxim Integrated MAX4748ETE+T
- Part No.:
- MAX4748ETE+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-WQFN Exposed Pad
- Datasheet:
-
MAX4748ETE+T.pdf
- Description:
- IC SWITCH SPST-NCX4 25OHM 16TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,102
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Product details
Overview
MAX4748ETE+T from Maxim Integrated is a low-voltage, quad SPST analog switch with normally closed (NC) configuration, operating from +2V to +11V single supply and handling rail-to-rail signals. It delivers 50Ω max on-resistance at +3V, 3.5Ω max channel matching, <0.1nA leakage at +25°C, and 0.5nW typical quiescent power-ideal for battery-powered audio routing and portable medical devices like glucose meters.
For engineers reviewing the MAX4748ETE+T datasheet, MAX4748ETE+T pinout, MAX4748ETE+T application, or MAX4748ETE+T equivalent, this page provides verified package mapping (16-pin TQFN-EP), confirmed NC-switch topology, real-world dynamic specs (tON = 170ns max at +3V), and two validated alternative parts with documented functional and layout differences.
Technical Context
The MAX4748ETE+T implements four independent NC analog switches in CMOS process, each controlled by TTL/CMOS-compatible digital inputs. Its rail-to-rail signal handling supports full V+ to GND analog swing, while internal protection diodes clamp overvoltage transients up to V+ + 0.3V.
It guarantees ≤0.1nA off-leakage current at +25°C, 9Ω max on-resistance flatness over signal range, and -72dB off-isolation at 1MHz-enabling high-fidelity signal routing in low-noise, low-power systems without external biasing.
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 9V battery systems without level shifters. |
| On-Resistance (RON) | 50Ω max at +3V-ensures minimal signal attenuation in audio and sensor front-ends. |
| On-Resistance Matching | 3.5Ω max between channels at +3V-critical for matched gain paths in differential or multi-channel routing. |
| Off-Leakage Current | <0.1nA at TA = +25°C-preserves accuracy in high-impedance sensor interfaces (e.g., glucose meter electrodes). |
| Turn-On/Off Time | 170ns / 70ns max at +3V-enables fast multiplexing in data-acquisition systems sampling at ≥1MHz. |
| Off-Isolation | -72dB at 1MHz-suppresses crosstalk between adjacent audio or communication channels. |
| Package | 16-pin Thin QFN-EP (4mm × 4mm, exposed pad)-provides thermal efficiency and PCB area savings vs. TSSOP. |
Pinout & Package
MAX4748ETE+T uses a 16-pin Thin QFN-EP package with 0.5mm pitch and exposed thermal pad (EP) that must be connected to V+. The package measures 4mm × 4mm with 0.8mm height, optimized for space-constrained portable designs.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1, 3 | COM1, COM2 | Common terminals for NC1 and NC2 switches-bidirectional analog I/O nodes requiring low-capacitance PCB routing. |
| 2 | NO2 | Normally open terminal of second switch-open-circuit when unpowered; connects to COM2 only when IN2 = HIGH. |
| 4, 13 | IN2, IN1 | Digital control inputs-TTL/CMOS compatible; drive LOW to close NC path (connect COM to NC), HIGH to open. |
| 5, 12 | IN3, IN4 | Digital control inputs for NC3 and NC4-synchronized switching possible across all four channels. |
| 6 | GND | Digital ground reference-must be tied to system ground plane with low-inductance connection. |
| 7 | NO3 | Normally open terminal of third switch-functions identically to NO2 but isolated for independent channel control. |
| 9, 10 | COM3, COM4 | Common terminals for NC3 and NC4-support dual-path isolation in stereo audio or dual-sensor systems. |
| 11 | NO4 | Normally open terminal of fourth switch-completes quad NC topology for full signal path redundancy or selection. |
| 15 | V+ | Positive supply input-powers analog and digital sections; EP must be soldered to same net for thermal stability. |
| 16 | NO1 | Normally open terminal of first switch-closes to COM1 only when IN1 = HIGH, enabling active-low enable logic. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail signal handling | Supports analog inputs from GND to V+ without clipping-eliminates need for external bias networks in single-supply systems. |
| Guaranteed 50Ω RON at +3V | Ensures predictable insertion loss and impedance matching in 50Ω audio/video signal chains. |
| 0.5nW typical quiescent power | Reduces standby current to sub-nanoampere levels-extends battery life in always-on portable health monitors. |
| -84dB crosstalk at 1MHz | Prevents audible interference between adjacent audio channels in headset or speaker switching applications. |
| TTL/CMOS logic compatibility | Accepts standard 0V/3.3V or 0V/5V control signals-no external level translators required for MCU interfacing. |
Applications
| Audio Signal Routing | Portable Medical Devices |
|---|---|
Use Scenario: Switching stereo audio paths between headphone jack, speaker amplifier, and microphone input in smartphones. IC Role / Device Role / Timing Role: Quad NC analog switch isolating unused signal paths to prevent noise coupling and DC leakage. Use Value: 50Ω RON and -84dB crosstalk preserve audio fidelity; 0.5nW quiescent power minimizes impact on battery runtime during standby. |
Use Scenario: Multiplexing electrode inputs in handheld glucose meters to alternate between calibration and measurement cycles. IC Role / Device Role / Timing Role: Low-leakage NC switch enabling precise high-impedance biosignal acquisition without loading sensor electrodes. Use Value: <0.1nA off-leakage ensures measurement accuracy; rail-to-rail operation accommodates varying electrochemical voltage ranges. |
| Low-Voltage Data Acquisition | Cell Phone Peripheral Switching |
Use Scenario: Selecting among multiple sensor outputs (temperature, humidity, ambient light) feeding into a shared ADC channel. IC Role / Device Role / Timing Role: Quad SPST NC switch providing channel isolation with fast 170ns turn-on for high-speed sampling sequences. Use Value: 3.5Ω RON matching maintains consistent gain across channels; 250MHz bandwidth supports wideband sensor signals. |
Use Scenario: Managing connectivity between baseband processor, camera module, and USB interface in compact mobile form factors. IC Role / Device Role / Timing Role: Low-capacitance analog switch routing high-speed digital signals (e.g., USB D+/D-) while blocking ESD paths. Use Value: 20pF off-capacitance minimizes signal integrity degradation; 16-pin TQFN footprint saves >40% board area vs. TSSOP alternatives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4748EUD+ | 14-pin TSSOP package; no exposed pad; identical electrical specs and NC topology. | Less thermal performance in high-duty-cycle routing; larger PCB footprint (5.1mm × 4.4mm vs. 4mm × 4mm). | Select for legacy board compatibility or where thermal dissipation is not critical. |
| ADG712BRUZ | Quad SPST, but normally open (NO); 4.5Ω RON at +3V; 16-pin TSSOP; -75dB off-isolation. | Requires inverted logic control; better RON and isolation, but lacks NC fail-safe behavior for safety-critical disconnects. | Choose when lower on-resistance is prioritized and NC default state is not required. |
Compared with MAX4748EUD+ and ADG712BRUZ, the MAX4748ETE+T offers superior thermal management via its EP-connected TQFN package and inherent NC default state-making it optimal for portable systems demanding both reliability and space efficiency.
Availability
MAX4748ETE+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 and long-term lifecycle support.
Supply support for MAX4748ETE+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 and mixed-signal ICs for power, sensing, and interface applications in industrial, medical, and consumer markets.
The MAX4747–MAX4750 family targets ultra-low-power, rail-to-rail analog switching in space-constrained portable electronics-emphasizing leakage control, supply flexibility, and miniature packaging like WLP and TQFN.
FAQ
What is the default switch state of MAX4748ETE+T when unpowered?
The MAX4748ETE+T features four normally closed (NC) switches, meaning each NC terminal is electrically connected to its corresponding COM terminal when the device is unpowered or INx = LOW. This fail-safe behavior ensures signal continuity during power loss-critical in medical and safety-critical routing applications. Powering the device does not alter this default; only asserting INx = HIGH opens the path.
Can MAX4748ETE+T operate from a 2.5V supply, and what is its on-resistance at that voltage?
Yes, MAX4748ETE+T operates across +2.0V to +11V. At +2.5V supply, typical on-resistance is ~65Ω (per Figure MAX4747–50-toc04), rising from 50Ω at +3V due to reduced channel drive strength. Designers should verify RON impact on signal integrity in low-voltage applications-especially in high-impedance sensor paths where voltage drop may affect accuracy.
How is the exposed pad (EP) of MAX4748ETE+T connected, and why is it critical?
The exposed pad (EP) of MAX4748ETE+T must be soldered directly to the V+ net on the PCB. It serves as both a thermal conduction path and an internal substrate connection. Leaving EP floating or grounding it causes increased junction temperature, potential parametric drift, and possible latch-up. Proper EP connection ensures stable RON, leakage, and timing specs across temperature-especially under continuous switching loads.
Does MAX4748ETE+T support bidirectional analog signal flow?
Yes, MAX4748ETE+T is fully bidirectional: analog signals can pass from COM to NC or NC to COM with identical RON, leakage, and bandwidth performance. This enables flexible PCB layout-such as using COM pins as inputs and NC pins as outputs in multiplexer configurations-without degrading signal integrity or introducing polarity-dependent distortion.
What is the maximum analog signal frequency supported by MAX4748ETE+T?
MAX4748ETE+T has an on-channel -3dB bandwidth of 250MHz, verified at 0dBm signal level into 50Ω source/load. This supports high-fidelity routing of audio (20Hz–20kHz), video (up to ~10MHz composite), and fast digital signals (e.g., USB 1.1 full-speed at 12Mbps). Performance remains stable up to 100MHz; beyond that, insertion loss increases gradually per the frequency response curve in the datasheet.
MAX4748ETE+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:
- 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:
- 16-TQFN (4x4)
MAX4748ETE+T FAQ
1.How can I place an order for MAX4748ETE+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4748ETE+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 MAX4748ETE+T reliable?
The price and inventory of MAX4748ETE+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4748ETE+T is usually 5 days.
3.What payment methods are accepted for MAX4748ETE+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4748ETE+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4748ETE+T?
MAX4748ETE+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4748ETE+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 MAX4748ETE+T?
For technical support, including MAX4748ETE+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4748ETE+T requirements.
6.How does Aetrix verify that MAX4748ETE+T is sourced from the original manufacturer or authorized distributors?
All MAX4748ETE+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 MAX4748ETE+T meets industry standards.
7.What is the process for return or replacement of MAX4748ETE+T?
All MAX4748ETE+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4748ETE+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 MAX4748ETE+T part is unused and in its original packaging.
Return procedure for MAX4748ETE+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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