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Analog Devices Inc./Maxim Integrated MAX14689AETB+
- Part No.:
- MAX14689AETB+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
MAX14689AETB+.pdf
- Description:
- ULTRA-SMALL, LOW-RON, BEYOND-THE
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
MAX14689AETB+ from Maxim Integrated is an ultra-small, low-on-resistance (0.25Ω typ), double-pole/double-throw (DPDT) analog switch with Beyond-the-Rails™ capability enabling distortion-free signal switching from −5.5V to +5.5V independent of VCC, ideal for high-fidelity audio routing in portable devices powered by 1.6V–5.5V supplies.
For engineers reviewing the MAX14689AETB+ datasheet, MAX14689AETB+ pinout, MAX14689AETB+ application, or MAX14689AETB+ equivalent, this device supports GPIO-powered operation, break-before-make timing, ±15kV HBM ESD protection on COM/NO/NC pins, and dual-package availability-critical for space-constrained, low-distortion signal path design.
Technical Context
The MAX14689AETB+ implements a BiCMOS-based DPDT switch architecture with single-bit digital control (CB) that selects between normally closed (NC_) and normally open (NO_) paths per pole, supporting bidirectional AC/DC-biased analog signals without external negative supply. Its Beyond-the-Rails™ topology enables rail-to-rail signal handling even when VCC is below signal voltage.
It features break-before-make switching with tBBM ≤ 150µs at VCC = 2.5V, THD+N = 0.001% (typ) at 20Hz–20kHz, and 110MHz −3dB bandwidth-enabling high-fidelity audio/video channel selection while maintaining isolation (−60dB off-isolation) and crosstalk suppression (−100dB).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-Resistance (RON) | 0.25Ω typical at VCC = 2.5V - ensures minimal insertion loss and signal attenuation in audio paths. |
| Analog Signal Range | −5.5V to +5.5V independent of VCC - enables direct connection of AC-coupled audio signals without level-shifting. |
| Supply Voltage Range | +1.6V to +5.5V - allows direct GPIO powering and compatibility with modern low-voltage SoC I/O domains. |
| THD+N | 0.001% typical - preserves audio fidelity in smartphone/tablet codec interconnects and headphone switching. |
| Off-Isolation | −60dB at 100kHz - prevents audible leakage between inactive channels in multi-source audio systems. |
| Crosstalk | −100dB at 100kHz - eliminates inter-channel interference in stereo or dual-mic signal routing. |
| ESD Protection (COM_) | ±15kV HBM, ±10kV IEC 61000-4-2 air-gap - ensures robustness during handheld device assembly and end-user handling. |
Pinout & Package
MAX14689AETB+ uses a 10-pin TDFN-EP package (2.5mm × 2.0mm, 0.5mm pitch) with exposed pad (EP) connected to GND for thermal and EMI performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| NO1, NO2 | Normally Open terminal (Switch 1 & 2) | Signal path connected to COM_ only when CB = high - used for alternate signal source routing. |
| NC1, NC2 | Normally Closed terminal (Switch 1 & 2) | Signal path connected to COM_ when CB = low - default path for primary input/output selection. |
| COM1, COM2 | Common terminal (Switch 1 & 2) | Bidirectional analog I/O node - accepts or delivers signals across full −5.5V to +5.5V range regardless of VCC state. |
| CB | Digital control input | Single logic bit controlling both poles simultaneously; VIH = 1.4V min, VIL = 0.325V max - compatible with 1.8V/2.5V/3.3V GPIOs. |
| VCC | Power supply input | +1.6V to +5.5V supply; requires local 0.1µF bypass capacitor - enables ultra-low ICC (40µA typ at 1.6V) for battery-sensitive designs. |
| GND | Ground reference | Reference for all analog and digital signals; EP must be soldered to PCB ground plane for thermal dissipation and noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Beyond-the-Rails™ signaling | Supports −5.5V to +5.5V analog signals with VCC as low as 1.6V - eliminates need for charge pumps or dual supplies in portable audio. |
| Break-before-make switching | tBBM ≤ 150µs ensures no momentary short between NC_ and NO_ paths - prevents pop/click artifacts during audio source switching. |
| Ultra-low THD+N | 0.001% typical at 20Hz–20kHz - maintains studio-grade audio integrity in headphone amplifiers and line-out multiplexers. |
| GPIO-compatible supply | ICC = 40µA typ at VCC = 1.6V - allows direct sourcing from microcontroller GPIO without dedicated LDO. |
| High ESD resilience | ±15kV HBM on COM_/NO_/NC_, ±8kV IEC contact on COM_ - meets stringent IEC 61000-4-2 Level 4 for consumer electronics reliability. |
Applications
| Smartphone Audio Routing | Tablet Stereo Channel Switching |
|---|---|
|
Use Scenario: Dynamic reconfiguration of microphone inputs and speaker/headphone outputs based on accessory detection or user mode. IC Role / Device Role / Timing Role: DPDT analog switch providing bidirectional, low-distortion signal path selection between codec, mic bias, and audio jack. Use Value: Enables seamless transition between earpiece, speakerphone, and Bluetooth headset modes without audible artifacts or signal clipping. |
Use Scenario: Selecting between left/right stereo channels for dual-speaker output or mono headphone drive in compact tablet form factors. IC Role / Device Role / Timing Role: Dual-pole analog switch routing differential audio signals with matched RON and flatness to preserve channel balance. Use Value: Delivers <0.01Ω RON match and <0.01Ω flatness across −5.5V to +5.5V - ensuring consistent gain and phase response in stereo playback. |
| Portable Media Player Line-Out Multiplexer | USB-C Audio Adapter Signal Switching |
|
Use Scenario: Multiplexing line-level analog outputs from multiple DACs or codecs to a shared 3.5mm jack or external amplifier. IC Role / Device Role / Timing Role: Low-RON, high-bandwidth analog switch isolating active DAC path while blocking others to prevent loading and crosstalk. Use Value: 110MHz bandwidth and −100dB crosstalk suppress interference between simultaneous audio sources - critical for multi-DAC architectures. |
Use Scenario: Routing analog audio signals from USB-C Alternate Mode (Audio Accessory Mode) to TRRS headset or legacy 3.5mm jack. IC Role / Device Role / Timing Role: DPDT switch handling bidirectional analog signals (MIC_IN, HP_OUT_L/R) with rail-independent operation across varying VBUS levels. Use Value: −5.5V to +5.5V signal tolerance accommodates wide common-mode swing in USB-C audio accessories without external level shifters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar DPDT analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX14689EWL+T | Same die, 9-bump WLP (1.2mm × 1.2mm) - smaller footprint but no exposed pad; θJA = 83°C/W vs. 102°C/W for TDFN. | Preferred for ultra-thin smartphones where board area is constrained; less thermal margin than TDFN under sustained load. | Select MAX14689EWL+T for maximum miniaturization; choose MAX14689AETB+ for better thermal performance and easier reworkability. |
| TMUX1574RTER | TI part: 0.45Ω RON (min), −3.3V to +3.3V signal range, 1.2V–3.6V supply - narrower analog range, higher RON, no Beyond-the-Rails™ capability. | Suitable for lower-voltage, lower-fidelity applications like industrial sensor multiplexing; not recommended for −5.5V/+5.5V audio. | Use TMUX1574RTER only if signal range is limited to ±3.3V and THD+N > 0.01% is acceptable; MAX14689AETB+ remains superior for premium audio. |
Compared with MAX14689EWL+T, MAX14689AETB+ offers superior thermal management and mechanical robustness via its exposed-pad TDFN; versus TMUX1574RTER, it delivers 1.8× lower RON, 2× wider signal range, and 10× lower THD+N - making MAX14689AETB+ the only choice for high-fidelity portable audio switching.
Availability
MAX14689AETB+ is available at Aetrix Electronics and suitable for smartphone audio routing, tablet stereo channel switching, and USB-C audio adapter signal switching requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX14689AETB+ 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 applications in communications, computing, consumer, and industrial markets.
The MAX14689AETB+ belongs to Maxim's ultra-low-RON analog switch product line, engineered specifically for high-fidelity, space-constrained portable audio systems requiring rail-independent signal handling and extreme ESD resilience.
FAQ
What is the maximum analog signal voltage range supported by the MAX14689AETB+?
The MAX14689AETB+ supports analog signals from −5.5V to +5.5V relative to GND, independent of VCC voltage - a key feature of its Beyond-the-Rails™ architecture. This allows direct interfacing with AC-coupled audio signals without external level-shifting circuitry, even when VCC is as low as 1.6V. The specification is guaranteed over temperature and process variation.
Does the MAX14689AETB+ require external power sequencing or reset circuitry?
No, the MAX14689AETB+ does not require external power sequencing or reset circuitry. When VCC is unpowered, all switches enter high-impedance mode and tolerate −5.5V to +5.5V on COM_/NO_/NC_ pins. The CB control input operates with standard TTL/CMOS logic thresholds (VIH = 1.4V min, VIL = 0.325V max), eliminating need for level shifters or sequencers in most portable designs.
Can the MAX14689AETB+ be used in bidirectional signal paths?
Yes, the MAX14689AETB+ is fully bidirectional: COM_, NO_, and NC_ terminals function identically as inputs or outputs depending on system configuration. Its symmetrical RON and flatness (<0.01Ω), combined with matched THD+N performance in both directions, make it ideal for applications such as microphone preamp switching and headphone output multiplexing where signal flow direction changes dynamically.
What is the thermal performance of the MAX14689AETB+ in its TDFN package?
The MAX14689AETB+ in 10-pin TDFN-EP has a junction-to-ambient thermal resistance (θJA) of 102°C/W on a four-layer board. With its exposed pad (EP) soldered to a solid GND plane, it achieves reliable operation up to +85°C ambient. At 70°C ambient, derating begins at 9.8mW/°C above that point, allowing up to 784mW continuous power dissipation - sufficient for typical audio switching loads (<100mA per channel).
How does the MAX14689AETB+ handle ESD events during unpowered operation?
The MAX14689AETB+ maintains full ESD protection on all analog pins (±15kV HBM on COM_/NO_/NC_) even when VCC = 0V. Its internal protection structures remain active and functional without supply voltage, preventing latch-up or permanent damage during handling, board assembly, or hot-plug events - a critical requirement for USB-C audio adapters and smartphone accessory ports.
MAX14689AETB+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- Beyond-the-Rails™
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Switch Circuit:
- DPDT
- Multiplexer/Demultiplexer Circuit:
- 2:2
- Number of Circuits:
- 1
- On-State Resistance (Max):
- 450mOhm
- Channel-to-Channel Matching (ΔRon):
- 5mOhm
- Voltage - Supply, Single (V+):
- 1.6V ~ 5.5V
- Voltage - Supply, Dual (V±):
- -
- Switch Time (Ton, Toff) (Max):
- 200µs, 30µs
- -3db Bandwidth:
- 110MHz
- Charge Injection:
- -
- Channel Capacitance (CS(off), CD(off)):
- 25pF
- Current - Leakage (IS(off)) (Max):
- 100nA
- Crosstalk:
- -100dB @ 100kHz
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-TDFN (2.5x2)
MAX14689AETB+ FAQ
1.How can I place an order for MAX14689AETB+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX14689AETB+ 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 MAX14689AETB+ reliable?
The price and inventory of MAX14689AETB+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX14689AETB+ is usually 5 days.
3.What payment methods are accepted for MAX14689AETB+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX14689AETB+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX14689AETB+?
MAX14689AETB+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX14689AETB+ 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 MAX14689AETB+?
For technical support, including MAX14689AETB+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX14689AETB+ requirements.
6.How does Aetrix verify that MAX14689AETB+ is sourced from the original manufacturer or authorized distributors?
All MAX14689AETB+ 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 MAX14689AETB+ meets industry standards.
7.What is the process for return or replacement of MAX14689AETB+?
All MAX14689AETB+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX14689AETB+, 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 MAX14689AETB+ part is unused and in its original packaging.
Return procedure for MAX14689AETB+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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