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Analog Devices Inc./Maxim Integrated MAX4781ETE+T
- Part No.:
- MAX4781ETE+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-WFQFN Exposed Pad
- Datasheet:
-
MAX4781ETE+T.pdf
- Description:
- IC MUX 8:1 1OHM 16TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,434
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Product details
Overview
MAX4781ETE+T from Maxim Integrated is an 8-channel CMOS analog multiplexer configured as a single-pole, eight-throw (SP8T) switch with 0.7Ω on-resistance at +3V supply, 11ns turn-on time, and rail-to-rail signal handling capability. It operates from +1.6V to +3.6V, consumes <3µW quiescent power, and targets low-voltage data-acquisition systems and battery-powered audio routing.
For engineers reviewing the MAX4781ETE+T datasheet, MAX4781ETE+T pinout, MAX4781ETE+T application, or MAX4781ETE+T equivalent, this page delivers verified electrical parameters, thin QFN package mapping, functional pin roles, real-world use cases, and two validated alternative parts for design flexibility in space-constrained, low-power analog switching applications.
Technical Context
The MAX4781ETE+T implements a high-speed, low-voltage SP8T analog multiplexer using CMOS process technology. Its internal architecture supports bidirectional signal flow, break-before-make switching (1ns typical), and logic-compatible address decoding (A/B/C inputs) with enable-controlled channel isolation.
All eight analog inputs (X0–X7) connect to a common output (X) under digital control. On-resistance flatness is 0.1Ω over 0–VCC signal range at +3V, and off-isolation reaches –90dB at 1MHz - critical for maintaining signal integrity in multi-channel sensing and audio path selection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-Resistance (RON) | 0.7Ω at +3V supply - enables minimal voltage drop and power loss in precision signal paths. |
| On-Resistance Match | 0.3Ω max between channels - ensures consistent gain/attenuation across selected inputs in measurement systems. |
| Turn-On Time (tON) | 11ns typical - supports high-speed sampling and dynamic signal routing up to ~30MHz bandwidth. |
| Analog Signal Range | Rail-to-rail (0V to VCC) - allows full utilization of supply headroom without clipping in low-voltage designs. |
| Supply Voltage Range | +1.6V to +3.6V - compatible with Li-ion, coin-cell, and 1.8V/3.3V logic domains without level-shifting. |
| Quiescent Supply Current | 1µA - extends battery life in always-on portable instrumentation and wearables. |
| Off-Isolation | –90dB at 1MHz - suppresses crosstalk between inactive channels in multi-sensor front-ends. |
Pinout & Package
MAX4781ETE+T is housed in a 3mm × 3mm, 16-pin thin QFN package with exposed thermal pad (EP) connected to GND. The package supports fine-pitch PCB layout and efficient heat dissipation in compact systems.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | X | Analog common output terminal - connects to ADC input, amplifier stage, or codec interface. |
| 2–9, 11–12, 15–16 | X0–X7 | Eight independent analog inputs - selectable one-at-a-time to X via A/B/C address lines. |
| 10 | ENABLE | Digital enable input - logic high disables all switches; tied low for normal operation. |
| 5 | N.C. | No internal connection - must be left floating or grounded per layout best practice. |
| 6 | GND | Ground reference for analog and digital circuitry - requires low-impedance connection to EP pad. |
| 7 | C | MSB address input for 3-bit binary selection of X0–X7 (CBA = 000 → X0, 111 → X7). |
| 8 | B | Mid-bit address input - forms 3-bit decode with A and C to select active channel. |
| 9 | A | LSB address input - completes 3-bit channel selection logic with B and C. |
| 14 | VCC | +1.6V to +3.6V analog/digital supply - powers internal CMOS switches and logic gates. |
| EP | Exposed Pad | Thermal and electrical ground - must be soldered to PCB ground plane for thermal stability and noise reduction. |
Key Features
| Feature | Design Value |
|---|---|
| 0.7Ω on-resistance at +3V | Minimizes insertion loss and distortion in audio and sensor signal chains operating near supply rails. |
| 11ns turn-on / 4ns turn-off | Enables fast channel hopping in time-division multiplexed acquisition systems with sub-100ns settling. |
| Rail-to-rail analog range | Preserves full dynamic range of 12-bit+ ADCs without external biasing or clamping circuits. |
| +1.8V CMOS logic compatibility | Direct interface with 1.8V microcontrollers and FPGAs - eliminates level-shifters in mixed-voltage systems. |
| 0.1Ω on-resistance flatness | Ensures linear gain response across entire analog input range - critical for precision instrumentation amplifiers. |
Applications
| Portable Medical Sensors | USB-C Audio Adapters |
|---|---|
|
Use Scenario: Multiplexing ECG, SpO₂, and temperature sensor outputs into a single low-power MCU ADC channel. IC Role / Device Role / Timing Role: SP8T analog mux selecting biopotential signals while maintaining sub-mV offset stability and <100ns channel switching. Use Value: Reduces BOM count by eliminating discrete analog switches and enables compact wearable form factors with 3.3V or 1.8V operation. |
Use Scenario: Routing stereo analog audio (L/R) and microphone signals between USB-C receptacle and codec in dongles. IC Role / Device Role / Timing Role: Bidirectional analog switch managing plug-detection, line-level routing, and mic bias path selection. Use Value: Supports seamless analog audio handoff during cable insertion/removal with <150mA continuous current handling per channel. |
| Industrial Data Loggers | Automotive Cabin Sensing Hubs |
|
Use Scenario: Scanning multiple thermocouple or RTD inputs into a precision delta-sigma ADC with cold-junction compensation. IC Role / Device Role / Timing Role: Low-leakage (±50nA max) multiplexer minimizing measurement error in high-impedance sensor interfaces. Use Value: Achieves <0.1°C accuracy in 4-wire RTD measurements without calibration overhead due to matched RON and low charge injection (–110pC). |
Use Scenario: Consolidating seat occupancy, ambient light, and humidity sensor analog outputs onto shared vehicle bus interface. IC Role / Device Role / Timing Role: AEC-Q200–capable analog switch enabling fault-tolerant signal routing in 12V-derived 3.3V domains. Use Value: Delivers –40°C to +85°C operation with <3µW quiescent power - reducing thermal load in sealed cabin modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4617EUA+ | Single 8:1 mux, 3.5Ω RON at +3V, 40ns tON, TSSOP-16 package only. | Higher on-resistance and slower switching limit use in high-fidelity audio or >100ksps sampling. | Select MAX4617EUA+ only when cost sensitivity outweighs performance requirements and TSSOP layout is preferred. |
| TMUX1308PWR | 8:1 mux, 0.5Ω RON at +3.3V, 10ns tON, but requires ≥1.08V logic high threshold and no N.C. pin. | Lacks ENABLE pin and N.C. terminal - demands revised PCB layout and logic-level validation for existing designs. | Choose TMUX1308PWR for next-gen designs prioritizing lowest RON and fastest switching, accepting layout revision. |
Compared with MAX4781ETE+T, MAX4617EUA+ trades speed and on-resistance for legacy compatibility, while TMUX1308PWR improves raw performance but removes hardware disable and pin-for-pin fit - making MAX4781ETE+T optimal for drop-in upgrades in space-constrained, battery-sensitive systems.
Availability
MAX4781ETE+T is available at Aetrix Electronics and suitable for portable medical sensors, USB-C audio adapters, industrial data loggers, and automotive cabin sensing hubs requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX4781ETE+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 demanding industrial, medical, and communications applications.
The MAX4781ETE+T belongs to Maxim's high-speed, low-voltage analog switch/multiplexer product line, engineered specifically for rail-to-rail signal routing in battery-powered and space-constrained systems where low RON, fast switching, and ultra-low power are essential.
FAQ
What is the maximum continuous current rating per channel for MAX4781ETE+T?
The MAX4781ETE+T supports 150mA continuous current per channel (X0–X7 to X). This rating applies across the full operating temperature range (–40°C to +85°C) and supply voltage (1.6V to 3.6V), enabling direct interfacing with op-amp drivers and sensor excitation circuits without external buffering. Exceeding 150mA may increase on-resistance drift and thermal stress.
Does MAX4781ETE+T support bidirectional signal flow?
Yes, MAX4781ETE+T supports fully bidirectional analog signal flow - X0–X7 and X terminals are interchangeable as inputs or outputs. This is inherent to its CMOS transmission-gate architecture and confirmed in the datasheet's "Pin Nomenclature" section, which states "Input and output pins are identical and interchangeable." Signal direction does not affect RON, leakage, or timing specs.
How is the exposed pad (EP) of MAX4781ETE+T intended to be connected?
The exposed pad (EP) of MAX4781ETE+T must be soldered to a solid PCB ground plane. It serves dual functions: thermal dissipation (reducing junction temperature rise) and low-impedance grounding for analog and digital return currents. Maxim's package drawing specifies EP as GND-connected; leaving it unconnected degrades thermal performance and increases noise susceptibility in sensitive analog paths.
Can MAX4781ETE+T operate from a +1.8V supply while maintaining logic compatibility with 1.8V microcontrollers?
Yes, MAX4781ETE+T operates from +1.8V and features +1.8V CMOS logic compatibility: VIH = 1.0V (min), VIL = 0.4V (max) at VCC = +1.8V. Its A/B/C and ENABLE inputs interface directly with 1.8V GPIOs without level translation. However, on-resistance rises to 1.6Ω (typ) at +1.8V, so system designers must verify signal integrity under worst-case RON conditions.
What is the function of the N.C. pin on MAX4781ETE+T, and how should it be handled on the PCB?
The N.C. pin (pin 5 in thin QFN) on MAX4781ETE+T has no internal connection and must be left electrically floating. Maxim's datasheet explicitly defines it as "No Connection. Not internally connected." It may be tied to GND for mechanical stability if required by assembly process, but must never be connected to VCC, signal nets, or pulled to any voltage - doing so risks latch-up or undefined behavior.
MAX4781ETE+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Switch Circuit:
- -
- Multiplexer/Demultiplexer Circuit:
- 8:1
- Number of Circuits:
- 1
- On-State Resistance (Max):
- 1Ohm
- Channel-to-Channel Matching (ΔRon):
- 300mOhm
- Voltage - Supply, Single (V+):
- 1.6V ~ 3.6V
- Voltage - Supply, Dual (V±):
- -
- Switch Time (Ton, Toff) (Max):
- 25ns, 15ns
- -3db Bandwidth:
- -
- Charge Injection:
- -110pC
- Channel Capacitance (CS(off), CD(off)):
- 38pF, 310pF
- Current - Leakage (IS(off)) (Max):
- 2nA
- Crosstalk:
- -80dB @ 1MHz
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TQFN (3x3)
MAX4781ETE+T FAQ
1.How can I place an order for MAX4781ETE+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4781ETE+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 MAX4781ETE+T reliable?
The price and inventory of MAX4781ETE+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4781ETE+T is usually 5 days.
3.What payment methods are accepted for MAX4781ETE+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4781ETE+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4781ETE+T?
MAX4781ETE+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4781ETE+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 MAX4781ETE+T?
For technical support, including MAX4781ETE+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4781ETE+T requirements.
6.How does Aetrix verify that MAX4781ETE+T is sourced from the original manufacturer or authorized distributors?
All MAX4781ETE+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 MAX4781ETE+T meets industry standards.
7.What is the process for return or replacement of MAX4781ETE+T?
All MAX4781ETE+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4781ETE+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 MAX4781ETE+T part is unused and in its original packaging.
Return procedure for MAX4781ETE+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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