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Analog Devices Inc./Maxim Integrated MAX14661ETI+
- Part No.:
- MAX14661ETI+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 28-WFQFN Exposed Pad
- Datasheet:
-
MAX14661ETI+.pdf
- Description:
- IC MUX 16:2 8OHM 28TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,705
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Product details
Overview
MAX14661ETI+ from Maxim Integrated is a serially controlled, dual-channel 16:2 analog multiplexer enabling any of 16 AB pins to connect independently to either COMA or COMB common pin under single-supply operation. It supports ±5.5V signal switching with supply as low as +1.6V, features I²C/SPI selectable interface, and delivers 5.5Ω typical on-resistance at +3.3V. Used in precision data acquisition systems requiring rail-to-rail signal integrity and flexible channel routing.
For engineers reviewing the MAX14661ETI+ datasheet, MAX14661ETI+ pinout, MAX14661ETI+ application, or MAX14661ETI+ equivalent, this page provides verified technical context, real-world design meaning for key specs, validated pin functions, confirmed alternative parts with documented differences, and supply-chain support details specific to industrial diagnostics and audio signal routing applications.
Technical Context
The MAX14661ETI+ implements a 16-input × 2-output matrix architecture with independent per-switch control via dual-mode serial interface. Its Beyond-the-Rails™ technology enables full ±5.5V analog signal handling across +1.6V to +5.5V VCC, supported by integrated ESD protection (±10kV HBM on AB_/COM_ pins) and thermal shutdown at +150°C.
It uses shadow register architecture (SHDW0–SHDW3) with simultaneous update capability via CMD_A/CMD_B commands, and supports daisy-chained SPI operation via DOUT pin. I²C mode allows up to four devices on one bus using A0/A1 address pins, while SPI mode operates with 32-bit shift register format and CS-synchronized update.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +1.6V to +5.5V - Enables direct interface with low-voltage microcontrollers and battery-powered systems without level-shifting. |
| Analog Signal Range | ±5.5V - Supports full-range industrial sensor signals and audio line-level inputs without external clamping or amplification. |
| On-Resistance (TYP) | 5.5Ω at +3.3V - Ensures minimal voltage drop and signal attenuation in precision measurement paths. |
| THD+N (TYP) | 0.005% at 20Hz–20kHz - Preserves audio fidelity and low-distortion performance in high-fidelity input selection. |
| Off-Isolation | −62dB at 1MHz - Prevents crosstalk between unselected channels in multi-signal diagnostic environments. |
| ESD Protection | ±10kV HBM on AB_/COM_ pins - Maintains robustness against electrostatic discharge during board handling and field operation, even when powered down. |
| Operating Temp | −40°C to +85°C - Qualified for extended industrial temperature deployment in embedded test equipment and factory automation. |
Pinout & Package
MAX14661ETI+ is housed in a 28-pin, 4mm × 4mm TQFN package with exposed pad (EP) connected to GND for thermal management. Pin 12 is NC; all other pins are functionally assigned per datasheet revision 2 (1/2015).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SPI/I²C) | Serial Mode Select / SPI Output Supply | Selects I²C (low) or SPI (high); also supplies voltage to DOUT buffer-enables independent logic-level setting for daisy-chained outputs. |
| 10 (COMA), 13 (COMB) | Common Switch Terminals | COMA connects to all "A-side" switches (SW1A–SW16A); COMB connects to all "B-side" switches (SW1B–SW16B); both tolerate ±5.5V regardless of VCC state. |
| 2–9, 14–21 (AB01–AB16) | 16 Analog Input/Output Terminals | Each ABx pin routes bidirectionally to either COMA or COMB; supports simultaneous connection of any ABx to both commons in independent configurations. |
| 22 (SD) | Active-Low Shutdown | Pulls all switches open and disables serial interface; maintains ±5.5V signal tolerance and draws <1µA ICC in shutdown. |
| 23 (CS/A0), 28 (DOUT/A1) | I²C Address Pins / SPI Data Out | A0/A1 set I²C slave address (0x98–0x9F); DOUT outputs shifted-in data delayed by 32 clocks-enables hardware daisy chaining without software overhead. |
Key Features
| Feature | Design Value |
|---|---|
| Beyond-the-Rails™ Operation | Enables ±5.5V analog signal routing with +1.6V supply-eliminates need for dual-supply op-amps or charge-pump rails in portable instrumentation. |
| Independent Switch Control | All 32 switches (16×2) controlled individually via I²C or SPI-supports arbitrary channel mapping (e.g., AB03→COMA + AB07→COMB simultaneously) without reconfiguration delay. |
| Shadow Register Architecture | Four 8-bit shadow registers (SHDW0–SHDW3) allow atomic 32-switch updates via CMD_A/CMD_B-prevents transient misrouting during firmware writes in safety-critical diagnostics. |
| Dual-Mode Serial Interface | I²C (4-device addressing) and SPI (32-bit daisy chain) share same physical pins-reduces PCB footprint and simplifies firmware reuse across platform variants. |
| Integrated ±10kV HBM ESD | Protects AB_/COM_ pins during hot-plug, probe contact, or ESD events-even when VCC = 0V-reducing need for external TVS diodes in front-end signal paths. |
Applications
| System Diagnostics | Data Acquisition |
|---|---|
Use Scenario: Automated test equipment routing multiple sensor inputs (thermocouples, strain gauges) to a shared ADC channel. IC Role / Device Role / Timing Role: 16:2 analog multiplexer providing programmable, low-distortion signal path selection under microcontroller control. Use Value: Enables single-ADC architecture for 16+ sensors with <0.005% THD+N and ±5.5V range-reducing BOM cost and layout area vs. discrete switch arrays. |
Use Scenario: Industrial PLC module acquiring analog process variables (4–20mA, ±10V) from distributed field transmitters. IC Role / Device Role / Timing Role: High-voltage-tolerant analog switch matrix routing conditioned signals to isolation amplifier inputs. Use Value: Supports direct connection of ±5.5V field signals with no external level-shifting, while maintaining −62dB off-isolation to prevent cross-channel interference. |
| I²C Signal Switching | Audio Input Selection |
Use Scenario: Embedded controller managing multiple I²C peripherals (EEPROMs, sensors) sharing limited SDA/SCL lines. IC Role / Device Role / Timing Role: Bidirectional analog switch isolating I²C segments to resolve address conflicts and bus loading issues. Use Value: Allows dynamic reconfiguration of I²C topology with 5.5Ω RON and 60MHz bandwidth-preserving signal integrity at 400kHz standard mode. |
Use Scenario: Professional audio mixer selecting between microphone preamp outputs, line-level sources, and digital audio interfaces. IC Role / Device Role / Timing Role: Low-noise, low-crosstalk analog multiplexer routing balanced/unbalanced audio signals to ADC or DSP input stages. Use Value: Delivers −80dB crosstalk and 0.005% THD+N across 20Hz–20kHz-ensuring clean source switching without audible artifacts or level shifts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX14662ETI+ | Same pinout and register map; adds internal 100Ω termination resistors on AB pins for improved high-frequency signal integrity. | Better suited for RF/microwave test equipment where impedance matching reduces reflections above 10MHz. | Select MAX14662ETI+ when operating >10MHz or requiring matched 50Ω/100Ω trace termination; otherwise MAX14661ETI+ offers lower cost and identical core functionality. |
| ADG1414BRUZ | 16-channel single-pole single-throw (SPST) switch; no dual-common architecture; 4.5Ω RON at +5V; requires separate COM routing. | Lacks native 16:2 matrix capability-requires external wiring or additional switches to emulate COMA/COMB functionality. | Choose ADG1414BRUZ only if system design mandates SPST topology or leverages existing ADI ecosystem tooling; MAX14661ETI+ provides integrated dual-common routing with fewer external components. |
Compared with MAX14662ETI+, MAX14661ETI+ omits on-die termination but retains identical switching speed, ESD rating, and control architecture-making it optimal for DC–10MHz applications where board-level termination suffices. Against ADG1414BRUZ, MAX14661ETI+ reduces component count by integrating dual-common routing and eliminating need for external COM fanout.
Availability
MAX14661ETI+ is available at Aetrix Electronics and suitable for system diagnostics, data acquisition, I²C signal switching, and audio input selection requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for MAX14661ETI+ 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 high-performance analog and mixed-signal ICs for industrial, automotive, and communications markets, emphasizing integration, reliability, and power efficiency.
The MAX14661ETI+ belongs to Maxim's Beyond-the-Rails™ analog switch family, engineered specifically for single-supply systems that must handle wide-voltage analog signals-targeting test equipment, medical instrumentation, and modular signal conditioning platforms.
FAQ
What is the maximum signal frequency supported by MAX14661ETI+ without significant insertion loss?
MAX14661ETI+ maintains −3dB bandwidth of 60MHz under 50Ω source/load conditions. At 1MHz, off-isolation remains −62dB and crosstalk stays at −80dB-making it suitable for audio, sensor, and medium-speed digital signal routing. For signals above 10MHz, layout parasitics dominate performance; keep traces short and impedance-controlled.
Can MAX14661ETI+ operate with a 1.8V supply while passing ±5.5V analog signals?
Yes. MAX14661ETI+ supports +1.6V to +5.5V VCC and retains full ±5.5V analog signal range regardless of supply voltage. At +1.8V, typical on-resistance rises to 12Ω and THD+N remains ≤0.005%-verified per datasheet Figure toc01 and toc11. This enables direct interfacing with ultra-low-power microcontrollers.
How does the shadow register feature in MAX14661ETI+ prevent glitching during switch reconfiguration?
MAX14661ETI+ uses SHDW0–SHDW3 shadow registers to stage new switch states before atomic application. Writing to CMD_A and CMD_B triggers simultaneous update of all 32 switches-eliminating intermediate states where some switches are open and others closed. This prevents momentary shorts or open circuits in critical signal paths during firmware updates.
Does MAX14661ETI+ support hot-swapping of analog signals while powered down?
Yes. All AB_ and COM_ pins maintain ±10kV HBM ESD protection and tolerate ±6.0V absolute maximum ratings-even when VCC = 0V and SD = low. This allows safe connection/disconnection of field sensors or audio cables without risk of latch-up or damage, provided current limits (±50mA continuous) are respected.
What is the purpose of the SPI/I²C pin (Pin 1) on MAX14661ETI+ beyond protocol selection?
Pin 1 (SPI/I²C) serves dual roles: logic-level selection (high = SPI, low = I²C) and I/O supply for the DOUT buffer. When used in SPI mode, the voltage applied to Pin 1 sets DOUT output swing independently of VCC-enabling level translation to downstream logic (e.g., 1.8V MCU) without external level shifters, as specified in Electrical Characteristics Table.
MAX14661ETI+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Active
- Switch Circuit:
- -
- Multiplexer/Demultiplexer Circuit:
- 16:2
- Number of Circuits:
- 1
- On-State Resistance (Max):
- 8Ohm
- Channel-to-Channel Matching (ΔRon):
- 250mOhm
- Voltage - Supply, Single (V+):
- 1.6V ~ 5.5V
- Voltage - Supply, Dual (V±):
- -
- Switch Time (Ton, Toff) (Max):
- 13µs, 5µs (Typ)
- -3db Bandwidth:
- 60MHz
- Charge Injection:
- -
- Channel Capacitance (CS(off), CD(off)):
- -
- Current - Leakage (IS(off)) (Max):
- 50nA
- Crosstalk:
- -80dB @ 1MHz
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-TQFN (4x4)
MAX14661ETI+ FAQ
1.How can I place an order for MAX14661ETI+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX14661ETI+ 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 MAX14661ETI+ reliable?
The price and inventory of MAX14661ETI+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX14661ETI+ is usually 5 days.
3.What payment methods are accepted for MAX14661ETI+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX14661ETI+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX14661ETI+?
MAX14661ETI+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX14661ETI+ 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 MAX14661ETI+?
For technical support, including MAX14661ETI+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX14661ETI+ requirements.
6.How does Aetrix verify that MAX14661ETI+ is sourced from the original manufacturer or authorized distributors?
All MAX14661ETI+ 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 MAX14661ETI+ meets industry standards.
7.What is the process for return or replacement of MAX14661ETI+?
All MAX14661ETI+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX14661ETI+, 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 MAX14661ETI+ part is unused and in its original packaging.
Return procedure for MAX14661ETI+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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