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Analog Devices Inc./Maxim Integrated MAX14661ETI+T
- Part No.:
- MAX14661ETI+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 28-WFQFN Exposed Pad
- Datasheet:
-
MAX14661ETI+T.pdf
- Description:
- IC MUX 16:2 8OHM 28TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:15,146
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Product details
Overview
MAX14661ETI+T 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 +1.6V to +5.5V supply, features I²C/SPI selectable interface, and delivers 5.5Ω typical RON, 0.005% THD+N, and ±10kV HBM ESD on AB_/COM_ pins. It is used in high-precision data acquisition systems requiring rail-to-rail signal integrity.
For engineers reviewing the MAX14661ETI+T datasheet, MAX14661ETI+T pinout, MAX14661ETI+T application, or MAX14661ETI+T equivalent, key selection criteria include Beyond-the-Rails™ analog range compatibility, independent per-switch control via SPI/I²C, simultaneous shadow-register update capability, low RON flatness (2.5mΩ), and guaranteed -40°C to +85°C operation in the 4mm × 4mm TQFN package.
Technical Context
The MAX14661ETI+T implements a 16-input, dual-output matrix switch architecture with two independent banks (A and B), each supporting 16 configurable connections to COMA or COMB. Its serial interface operates in either I²C (up to 400kHz, 7-bit address with A0/A1) or SPI (32-bit shift register with daisy-chain DOUT), with programmable shadow registers enabling atomic switch state updates without glitching.
Internally, it uses Beyond-the-Rails™ charge-pump-assisted switch cells to pass ±5.5V signals across the full +1.6V–+5.5V VCC range while maintaining low distortion (0.005% THD+N) and high off-isolation (-62dB at 1MHz). Thermal shutdown activates at +150°C with 25°C hysteresis, and all AB_/COM_ pins retain ±10kV HBM ESD protection even when unpowered.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +1.6V to +5.5V - Enables direct interfacing with low-voltage microcontrollers and battery-powered systems without level-shifting. |
| Analog Signal Range | ±5.5V - Supports industrial sensor inputs, audio line-level signals, and legacy ±5V instrumentation without external clamping or amplification. |
| On-Resistance (RON) | 8Ω typ @ VCC = +5V - Ensures minimal voltage drop and gain error in precision measurement paths. |
| RON Flatness | 25mΩ typ - Maintains consistent channel matching across full signal swing, critical for differential measurements and multiplexed ADC front-ends. |
| THD + Noise | 0.005% typ - Preserves signal fidelity in audio input selection and high-resolution data acquisition applications. |
| Off-Isolation | -62dB @ 1MHz - Prevents crosstalk between inactive channels during high-frequency multiplexing. |
| ESD Protection | ±10kV HBM on AB_/COM_ pins - Provides robust system-level immunity against handling and board-level transients without external TVS diodes. |
Pinout & Package
MAX14661ETI+T is housed in a 28-pin, 4mm × 4mm, 0.5mm pitch TQFN package with exposed pad (EP) connected to GND for thermal management. Pin 12 is NC; EP must be soldered to a large ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SPI/I²C) | Serial mode select / SPI output supply | High = SPI mode; Low = I²C mode; also supplies VIO for DOUT logic level, decoupled from VCC. |
| 10 (COMA), 13 (COMB) | Dual common outputs | Independent analog return paths for Bank A and Bank B switches; each supports ±5.5V signals and ±10kV HBM. |
| 2–9, 14–21 (AB01–AB16) | 16 bidirectional analog inputs/outputs | Each connects to both COMA and COMB via independent switches; all rated for ±5.5V and ±10kV HBM. |
| 22 (SD) | Active-low shutdown | Pulls all switches open and disables serial interface; maintains ±5.5V signal tolerance and draws <1µA quiescent current. |
| 23 (CS/A0), 28 (DOUT/A1) | I²C address bits / SPI chip select & data out | In I²C mode: configure 4-device bus addressing; in SPI mode: CS enables shift register, DOUT enables daisy-chaining. |
Key Features
| Feature | Design Value |
|---|---|
| Beyond-the-Rails™ operation | Enables ±5.5V analog signal routing from +1.6V single supply - eliminates need for dual-rail or charge-pump ICs in space-constrained designs. |
| Independent per-switch control | 32 individually addressable switches (16×2) via I²C or SPI - supports arbitrary connection topologies (e.g., AB03→COMA + AB12→COMB simultaneously). |
| Shadow register update | Four 8-bit shadow registers (SHDW0–SHDW3) allow atomic 32-bit state changes - prevents transient glitches during reconfiguration in real-time systems. |
| Daisy-chain SPI capability | DOUT pin relays prior shift-register contents - enables cascading multiple MAX14661ETI+T devices using only one CS line and three MCU pins (CS, SCLK, DIN). |
| Power-down signal tolerance | All AB_ and COM_ pins withstand ±5.5V with SD = LOW - allows hot-swap or partial-power-down scenarios without signal path damage. |
Applications
| System Diagnostics | Data Acquisition |
|---|---|
|
Use Scenario: Automated test equipment routes multiple sensor inputs (thermocouples, strain gauges) to a shared high-accuracy ADC. IC Role / Device Role / Timing Role: 16:2 analog multiplexer providing flexible, software-configurable signal path selection with sub-0.01% THD+N. Use Value: Eliminates mechanical relays and discrete analog switches, reducing calibration drift and enabling millisecond-scale channel switching. |
Use Scenario: Industrial PLC module conditions and digitizes up to 16 analog field inputs (4–20mA, ±10V) using a single precision ADC. IC Role / Device Role / Timing Role: Dual-common analog switch bank routing signals to COMA (for voltage inputs) or COMB (for current-loop sensing) with matched RON. Use Value: Achieves <1 LSB gain error across all channels due to 25mΩ RON flatness and ±5.5V beyond-the-rails range. |
| I²C Signal Switching | Audio Input Selection |
|
Use Scenario: Embedded host MCU shares a single I²C bus among multiple sensors, requiring dynamic isolation of slave addresses during read/write sequences. IC Role / Device Role / Timing Role: Bidirectional I²C bus switch isolating SDA/SCL lines between master and selected slave device using dedicated AB_/COM_ pairs. Use Value: Prevents bus contention and address collisions without protocol-aware logic; supports 400kHz Fast-mode timing with <5µs tOFF. |
Use Scenario: Professional audio mixer selects between 16 line/mic inputs and routes them to dual DSP processing paths (left/right or A/B buses). IC Role / Device Role / Timing Role: Low-distortion analog matrix switch with independent COMA/COMB outputs feeding stereo ADC front-ends. Use Value: Delivers 0.005% THD+N and -80dB crosstalk at 1MHz - preserves wideband audio fidelity and channel separation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX14662ETI+T | Same pinout and core specs, but adds internal 10-bit ADC and GPIOs; higher quiescent current (2.5mA vs. 1.5mA max). | Targeted at integrated data acquisition nodes where local digitization is required; not suitable for pure analog switching-only use cases. | Select MAX14662ETI+T only if on-chip ADC functionality is needed; otherwise MAX14661ETI+T offers lower power and simpler firmware. |
| ADG1414BRUZ | 16-channel single-ended mux (not dual-common); 4.5Ω RON @ +5V; no Beyond-the-Rails™; requires ≥±4.5V dual supply for ±5.5V signals. | Requires external level-shifting or dual supplies for same signal range; lacks SPI daisy-chain and shadow registers. | Choose ADG1414BRUZ for cost-sensitive, fixed-configuration systems with available dual rails; avoid when single-supply ±5.5V routing is mandatory. |
Compared with MAX14662ETI+T, the MAX14661ETI+T provides optimized analog switching performance with lower power and simpler control, while ADG1414BRUZ demands dual supplies and lacks atomic update capability - making MAX14661ETI+T the preferred choice for flexible, single-supply, high-fidelity multiplexing.
Availability
MAX14661ETI+T is available at Aetrix Electronics and suitable for system diagnostics, data acquisition, I²C signal switching, and audio input selection requiring stable component supply, long-term production continuity, and guaranteed extended temperature operation.
Supply support for MAX14661ETI+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 industrial, medical, and communications applications.
The MAX14661ETI+T belongs to Maxim's Beyond-the-Rails™ analog switch family, engineered specifically for single-supply systems needing wide analog signal range, low distortion, and robust serial configurability in compact packages.
FAQ
What is the maximum analog signal amplitude supported by the MAX14661ETI+T at VCC = +2.5V?
At VCC = +2.5V, the MAX14661ETI+T supports a maximum analog signal amplitude of ±5.5V (11VP-P) for frequencies below 500kHz. For f > 500kHz, the maximum amplitude reduces to ±3V (6VP-P) to maintain distortion-free operation, as specified in the Typical Operating Characteristics plot "Maximum Signal Amplitude vs. Supply Voltage" (Figure toc12).
Does the MAX14661ETI+T support true break-before-make switching?
Yes, the MAX14661ETI+T guarantees 0µs break-before-make time (tBBM) under all operating conditions. This ensures no momentary short-circuit between COMA and COMB during switch transitions, which is essential for protecting sensitive downstream circuitry in fault-tolerant systems.
Can the MAX14661ETI+T be used with a 1.8V microcontroller SPI interface?
Yes - the MAX14661ETI+T supports 1.8V SPI operation. The SPI/I²C pin serves as the DOUT output supply (VIO), so applying 1.8V to Pin 1 configures DOUT logic levels accordingly. DIN, SCLK, and CS thresholds remain compatible (VIH = 1.4V, VIL = 0.5V), and tDO propagation delay is 80ns at VCC ≥ 1.6V.
How does the MAX14661ETI+T handle ESD events when powered down?
The MAX14661ETI+T maintains ±10kV HBM ESD protection on all AB_ and COM_ pins even when VCC = 0V and SD = LOW. This is achieved through internal protection structures that remain active independent of power state - ensuring robustness during board handling, hot-plug events, or partial system power-down.
What is the purpose of the shadow registers in the MAX14661ETI+T?
The shadow registers (SHDW0–SHDW3) in the MAX14661ETI+T store pending switch states without immediately affecting hardware. Writing to CMD_A/CMD_B then atomically copies those values to the active DIR registers - enabling glitch-free, simultaneous reconfiguration of all 32 switches, which is critical for synchronized signal routing in real-time control loops.
MAX14661ETI+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:
- 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+T FAQ
1.How can I place an order for MAX14661ETI+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX14661ETI+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 MAX14661ETI+T reliable?
The price and inventory of MAX14661ETI+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX14661ETI+T is usually 5 days.
3.What payment methods are accepted for MAX14661ETI+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX14661ETI+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX14661ETI+T?
MAX14661ETI+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX14661ETI+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 MAX14661ETI+T?
For technical support, including MAX14661ETI+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX14661ETI+T requirements.
6.How does Aetrix verify that MAX14661ETI+T is sourced from the original manufacturer or authorized distributors?
All MAX14661ETI+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 MAX14661ETI+T meets industry standards.
7.What is the process for return or replacement of MAX14661ETI+T?
All MAX14661ETI+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX14661ETI+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 MAX14661ETI+T part is unused and in its original packaging.
Return procedure for MAX14661ETI+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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