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Analog Devices Inc./Maxim Integrated MAX4684ETB
- Part No.:
- MAX4684ETB
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
MAX4684ETB.pdf
- Description:
- IC SW SPDT-NO/NCX2 800MOHM 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:5,539
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Product details
Overview
The MAX4684ETB from Maxim Integrated is a low-voltage, dual single-pole/double-throw (SPDT) analog switch with 0.5Ω max NC and 0.8Ω max NO on-resistance at +2.7V supply, 50ns turn-on time, and rail-to-rail signal handling - designed for speaker/headset switching and battery-operated audio routing.
For engineers reviewing the MAX4684ETB datasheet, MAX4684ETB pinout, MAX4684ETB application, or MAX4684ETB equivalent, key selection criteria include its 10-pin Thin QFN package, break-before-make timing (2ns), 1.8V logic compatibility, and asymmetrical RON profile optimized for load-matching in portable audio paths.
Technical Context
The MAX4684ETB implements two independent SPDT switches with separate digital control inputs (IN1/IN2), each selecting between normally closed (NC) and normally open (NO) analog paths. Its CMOS transmission-gate architecture enables bidirectional signal flow across COM/NO/NC terminals with rail-to-rail analog voltage support from GND to V+.
Break-before-make switching prevents momentary shorting during state transitions, while low charge injection (200pC) and flat on-resistance (0.15Ω max) preserve signal integrity in audio-frequency applications. The device operates over +1.8V to +5.5V single supply and accepts 1.8V logic inputs even when V+ is ≥2.7V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| NC RON (max) | 0.5Ω at +2.7V - ensures minimal insertion loss for critical NC-path signals like primary speaker output |
| NO RON (max) | 0.8Ω at +2.7V - provides matched but slightly higher loss for secondary path (e.g., headset jack) |
| tON/tOFF | 50ns/40ns at +3V - enables fast channel switching without audible artifacts in audio routing |
| RON Match | 0.06Ω max between channels - maintains amplitude balance across stereo or dual-signal paths |
| Off-Isolation | -64dB at 100kHz - suppresses crosstalk between active and inactive signal paths |
| Supply Range | +1.8V to +5.5V - supports direct integration into Li-ion (3.0–4.2V), 3.3V, and 1.8V system rails |
| I+ (max) | 50nA at +5.5V - negligible quiescent draw for always-on battery monitoring or standby routing |
Pinout & Package
The MAX4684ETB is housed in a 10-pin Thin QFN package (3mm × 3mm, 0.8mm height) with exposed thermal pad, compatible with standard reflow profiles per JEDEC J-STD-020. Pin pitch is 0.5mm; pin 1 marked by top-side index area.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (V+) | Positive supply input | Accepts +1.8V to +5.5V; powers internal logic and analog switches |
| 2 (NO1) | Analog output - normally open path, Channel 1 | Connects to COM1 only when IN1 = logic high; used for secondary signal routing |
| 3 (NC1) | Analog output - normally closed path, Channel 1 | Connected to COM1 when IN1 = logic low; default path for primary signal (e.g., speaker) |
| 4 (IN1) | Digital control input, Channel 1 | 1.8V logic-compatible; drives first SPDT switch; active-high logic sense |
| 5 (GND) | Ground reference | Return path for supply and analog signals; must be low-impedance for THD < 0.03% |
| 6 (COM1) | Analog common terminal, Channel 1 | Bidirectional I/O; connects to either NC1 or NO1 depending on IN1 state |
| 7 (COM2) | Analog common terminal, Channel 2 | Independent second channel common node; supports stereo or dual-function routing |
| 8 (IN2) | Digital control input, Channel 2 | Independent control for second SPDT; enables synchronized or independent switching |
| 9 (NC2) | Analog output - normally closed path, Channel 2 | Default connection for second channel; e.g., auxiliary microphone input |
| 10 (NO2) | Analog output - normally open path, Channel 2 | Activated on IN2 high; used for alternate path like line-out or codec interface |
Key Features
| Feature | Design Value |
|---|---|
| Asymmetrical RON (NC/NO) | 0.5Ω/0.8Ω max enables optimized impedance matching for primary/secondary loads (e.g., 8Ω speaker vs. 32Ω headset) |
| Rail-to-rail analog range | Supports full V+ to GND signal swing without clipping - essential for unbuffered audio and sensor interfaces |
| Break-before-make (2ns) | Eliminates signal shorting during transition - prevents pop/click in audio and protects downstream circuitry |
| Low THD (0.03%) | Preserves audio fidelity across 20Hz–20kHz; validated with 600Ω load and 2Vp-p input |
| 1.8V logic compatibility | Accepts VIH ≥1.4V and VIL ≤0.5V regardless of V+ (up to +5.5V) - simplifies interface with low-voltage microcontrollers |
Applications
| Speaker Headset Switching | Power Routing |
|---|---|
Use Scenario: Automatically routes audio output between built-in speaker and 3.5mm headset jack based on plug detection. IC Role / Device Role / Timing Role: Dual SPDT analog switch providing isolated, low-loss signal paths with break-before-make to prevent transient shorts. Use Value: Eliminates mechanical relays; achieves <0.03% THD and <50ns switching for click-free transitions. | Use Scenario: Selects between main battery and backup power source for real-time clock or memory retention circuitry. IC Role / Device Role / Timing Role: Low-RON analog switch acting as precision power path controller with sub-100ns enable/disable timing. Use Value: 0.5Ω NC path minimizes voltage drop (<15mV at 30mA), preserving brownout margins in ultra-low-power systems. |
| MP3 Player Audio Path | Cellular Phone Baseband Interface |
Use Scenario: Routes DAC output to earpiece, loudspeaker, or line-out amplifier in portable media players. IC Role / Device Role / Timing Role: Dual-channel analog multiplexer enabling concurrent or exclusive signal routing under processor control. Use Value: Asymmetrical RON matches 16Ω earpiece (NC) and 32Ω line driver (NO); -64dB off-isolation prevents inter-channel bleed. | Use Scenario: Switches baseband audio signals between cellular transceiver, Bluetooth codec, and FM radio receiver in smartphone platforms. IC Role / Device Role / Timing Role: High-fidelity analog switch managing bidirectional voice/data paths with rail-to-rail support for ±1.2V codecs. Use Value: 200pC charge injection and 0.15Ω RON flatness ensure no DC offset or gain error in sensitive RF-adjacent analog sections. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4685ETB | Symmetric 0.8Ω RON on both NC and NO paths; identical timing, package, and supply specs | Preferred where matched channel resistance is required (e.g., differential signal routing or balanced audio) | Select MAX4685ETB when symmetry outweighs NC-path optimization; same footprint and layout |
| TMUX1574RTER | 0.5Ω RON, 4-channel SPDT, 1.8V–5.5V supply, but no break-before-make guarantee; 16-pin WQFN | Offers higher channel count and lower leakage (0.5pA), but lacks BBM timing control critical for audio pop suppression | Choose TMUX1574RTER only if additional channels justify PCB area increase and BBM is managed externally |
Compared with MAX4685ETB, the MAX4684ETB delivers lower NC-path loss for primary signal routing, while TMUX1574RTER trades guaranteed break-before-make for density - making MAX4684ETB optimal for cost-sensitive, pop-free audio switching where asymmetry improves system SNR.
Availability
MAX4684ETB is available at Aetrix Electronics and suitable for speaker headset switching, MP3 player audio routing, and battery-operated equipment requiring stable component supply and long-term industrial availability.
Supply support for MAX4684ETB 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, automotive, and consumer applications.
The MAX4684ETB belongs to Maxim's low-voltage analog switch product line, engineered specifically for high-fidelity, low-power signal routing in portable audio, communications, and battery-constrained systems.
FAQ
What is the maximum supply voltage rating for the MAX4684ETB?
The MAX4684ETB has an absolute maximum supply voltage (V+) of +6V, but its recommended operating range is +1.8V to +5.5V. Operation above +5.5V risks permanent damage, and exceeding +6V violates absolute maximum ratings. For reliable long-term use in battery-powered designs, keep V+ within the specified 1.8–5.5V window - the MAX4684ETB is fully characterized and guaranteed across this range, including at 3.3V and 5.0V nominal rails.
Does the MAX4684ETB support rail-to-rail analog signal operation?
Yes, the MAX4684ETB supports true rail-to-rail analog signal handling from GND to V+, meaning signals spanning the full supply range pass through with minimal distortion or on-resistance variation. This capability is confirmed across all operating voltages (+1.8V to +5.5V) and temperatures (−40°C to +85°C), enabling direct interfacing with unbuffered DACs, ADCs, and sensors without level-shifting - a key feature leveraged in the MAX4684ETB's audio and power-routing applications.
What is the logic threshold behavior of the MAX4684ETB control inputs?
The MAX4684ETB digital inputs (IN1/IN2) are 1.8V logic-compatible: VIH is guaranteed ≥1.4V and VIL ≤0.5V across the full +2.7V to +3.3V supply range, and remain functional up to +5.5V V+. Input leakage is ±1µA max. This allows direct interfacing with 1.8V, 2.5V, and 3.3V microcontrollers without level shifters - a design advantage explicitly validated in the MAX4684ETB datasheet and reflected in its use in MP3 players and cellular handsets.
How does the MAX4684ETB achieve pop-free switching in audio applications?
The MAX4684ETB achieves pop-free switching via guaranteed break-before-make timing (2ns typical, ≤15ns max) and ultra-low charge injection (200pC max). The BBM interval prevents momentary shorting between NC and NO paths during transitions, eliminating current spikes that cause audible pops. Combined with 0.03% THD and rail-to-rail operation, this ensures clean, artifact-free signal routing - a core requirement verified in MAX4684ETB applications like speaker/headset switching and cellular phone baseband interfaces.
Is the MAX4684ETB pin-compatible with other variants in the MAX4684/MAX4685 family?
Yes, the MAX4684ETB shares identical pinout and footprint with MAX4685ETB, MAX4684EUB, and MAX4685EUB - all use the same 10-pin configuration (V+, NO1, NC1, IN1, GND, COM1, COM2, IN2, NC2, NO2). This allows direct substitution between MAX4684ETB and MAX4685ETB in existing layouts, differing only in internal RON asymmetry (0.5Ω/0.8Ω vs. 0.8Ω/0.8Ω). No PCB changes are required when swapping these ETB variants, simplifying design flexibility and inventory management for the MAX4684ETB and its family members.
MAX4684ETB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Switch Circuit:
- SPDT - NO/NC
- Multiplexer/Demultiplexer Circuit:
- 2:1
- Number of Circuits:
- 2
- On-State Resistance (Max):
- 800mOhm
- Channel-to-Channel Matching (ΔRon):
- 60mOhm
- Voltage - Supply, Single (V+):
- 1.8V ~ 5.5V
- Voltage - Supply, Dual (V±):
- -
- Switch Time (Ton, Toff) (Max):
- 50ns, 30ns
- -3db Bandwidth:
- -
- Charge Injection:
- 200pC
- Channel Capacitance (CS(off), CD(off)):
- 84pF
- Current - Leakage (IS(off)) (Max):
- 1nA
- Crosstalk:
- -68dB @ 100kHz
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-TDFN-EP (3x3)
MAX4684ETB FAQ
1.How can I place an order for MAX4684ETB through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4684ETB 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 MAX4684ETB reliable?
The price and inventory of MAX4684ETB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4684ETB is usually 5 days.
3.What payment methods are accepted for MAX4684ETB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4684ETB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4684ETB?
MAX4684ETB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4684ETB 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 MAX4684ETB?
For technical support, including MAX4684ETB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4684ETB requirements.
6.How does Aetrix verify that MAX4684ETB is sourced from the original manufacturer or authorized distributors?
All MAX4684ETB 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 MAX4684ETB meets industry standards.
7.What is the process for return or replacement of MAX4684ETB?
All MAX4684ETB units undergo pre-shipment inspection (PSI). If there is an issue with MAX4684ETB, 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 MAX4684ETB part is unused and in its original packaging.
Return procedure for MAX4684ETB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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