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Analog Devices Inc./Maxim Integrated MAX4685EBC+T
- Part No.:
- MAX4685EBC+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- -
- Datasheet:
-
MAX4685EBC+T.pdf
- Description:
- IC SWITCH DUAL SPDT 12UCSP
- Quantity:
- Payment:
- Shipping:
Inventory:1,169
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Product details
Overview
MAX4685EBC+T from Maxim Integrated is a dual single-pole/double-throw (SPDT) analog switch IC designed for low-voltage signal routing in portable and battery-powered systems. It features 0.8Ω max on-resistance for both NO and NC switches at +2.7V supply, 50ns turn-on time, and rail-to-rail analog signal handling from GND to V+. It is used in audio path switching for cellular phones and headset multiplexing.
For engineers reviewing the MAX4685EBC+T datasheet, MAX4685EBC+T pinout, MAX4685EBC+T application, or MAX4685EBC+T equivalent, key selection criteria include guaranteed RON matching (≤0.06Ω), 1.8V logic compatibility, UCSP package footprint (2.0mm × 1.50mm), and break-before-make timing (2ns).
Technical Context
The MAX4685EBC+T implements two independent SPDT switches with break-before-make architecture, ensuring no signal shorting during state transitions. Each switch supports bidirectional analog signals across the full supply range (GND to V+), with guaranteed RON flatness ≤0.35Ω over the signal range and ≤0.06Ω match between channels.
Its digital control inputs accept 1.8V logic thresholds (VIL = 0.5V, VIH = 1.4V) and tolerate up to +5.5V regardless of V+, enabling interfacing with higher-voltage controllers. The device operates from +1.8V to +5.5V and delivers <1nA leakage at +25°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| RON (NO/NC) | 0.8Ω max at +2.7V - ensures minimal insertion loss in audio and data paths |
| RON Match | ≤0.06Ω - enables precise channel balancing in differential or stereo routing |
| tON/tOFF | 50ns/40ns max at +3V - supports fast signal reconfiguration in dynamic systems |
| Supply Range | +1.8V to +5.5V - compatible with Li-ion, coin-cell, and 3.3V/5V logic domains |
| Logic Compatibility | 1.8V input thresholds - interoperable with modern low-voltage microcontrollers |
| Off-Isolation | −64dB at 100kHz - suppresses crosstalk between active and inactive signal paths |
| THD | 0.03% - preserves fidelity in audio-frequency analog signal routing |
Pinout & Package
The MAX4685EBC+T is housed in a 12-bump, 0.5mm-pitch wafer-level chip-scale package (UCSP), occupying only 2.0mm × 1.50mm PCB area. The package has no leads; solder bumps serve as terminals and require JEDEC-compliant IR/vapor-phase reflow per specification J-STD-020A.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1, C1 | NC1, NC2 | Normally closed analog terminals - conduct when associated IN_ is logic low |
| A2, C2 | IN1, IN2 | Digital control inputs - TTL/CMOS-compatible with 1.8V logic thresholds |
| A3, C3 | COM1, COM2 | Common analog terminals - bidirectional I/O nodes shared by NO and NC paths |
| A4, C4 | NO1, NO2 | Normally open analog terminals - conduct when associated IN_ is logic high |
| B4 | V+ | Positive supply input - powers internal switch array and level translators |
| B1 | GND | Ground reference - must be connected to system ground for proper biasing |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail signal handling | Supports analog signals from GND to V+ without clipping or distortion |
| Break-before-make switching | 2ns minimum delay prevents momentary shorting between NO and NC paths |
| Low charge injection (200pC) | Minimizes voltage glitch at COM during switching - critical for precision sampling |
| Ultra-low leakage (±1nA @ +25°C) | Preserves DC accuracy and battery life in high-impedance sensor or audio circuits |
| 12-bump UCSP footprint | Reduces board area by >70% vs. μMAX or TDFN - ideal for space-constrained mobile designs |
Applications
| Speaker Headset Switching | MP3 Player Audio Routing |
|---|---|
Use Scenario: Dynamically routes mono/stereo audio between internal speaker, earpiece, and 3.5mm jack in smartphones. IC Role / Device Role / Timing Role: Dual SPDT analog switch managing concurrent audio path selection with break-before-make timing. Use Value: Enables seamless audio output handoff without pop/click due to 0.03% THD and 200pC charge injection. |
Use Scenario: Selects between DAC output, line-in, and microphone input in portable media players. IC Role / Device Role / Timing Role: Low-RON analog multiplexer routing bidirectional audio signals under microcontroller control. Use Value: Maintains signal integrity across 20Hz–20kHz with −64dB off-isolation and rail-to-rail swing capability. |
| Cellular Phone Power Routing | PCMCIA Card Signal Multiplexing |
Use Scenario: Routes power and data lines between baseband processor and RF transceiver modules during mode transitions. IC Role / Device Role / Timing Role: Low-leakage, high-speed analog switch enabling power domain isolation and signal path reconfiguration. Use Value: Supports battery longevity via 50nA max supply current and ±1nA leakage at +25°C. |
Use Scenario: Switches USB, UART, or audio signals between PCMCIA host controller and peripheral card functions. IC Role / Device Role / Timing Role: Dual-channel SPDT switch providing flexible interface signal routing with 1.8V logic compatibility. Use Value: Allows direct connection to 1.8V/3.3V host logic without level shifters due to wide VIH/VIL tolerance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual SPDT analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4684EBC+T | Asymmetric RON: 0.5Ω (NC) / 0.8Ω (NO) at +2.7V - optimized for unbalanced loads like speaker/headset pairs | Better suited for applications requiring different drive strengths on NC vs. NO paths | Select MAX4684EBC+T when NC path demands lower resistance than NO path |
| TMUX1574RUKR | Higher RON (1.3Ω typ), wider supply (1.08V–4.5V), smaller 1.6mm × 1.6mm DSBGA package | Targets ultra-low-voltage IoT sensors; lacks guaranteed RON match (0.15Ω typ) | Choose TMUX1574RUKR only if supply voltage drops below 1.8V or board area is tighter than 2.0mm × 1.50mm |
Compared with MAX4684EBC+T, the MAX4685EBC+T provides symmetrical RON for balanced dual-path routing, while TMUX1574RUKR trades RON performance for sub-1.8V operation - making MAX4685EBC+T optimal for 2.7V–3.3V audio and communication routing where channel matching and THD matter.
Availability
MAX4685EBC+T is available at Aetrix Electronics and suitable for cellular phone audio routing, MP3 player signal switching, and PCMCIA card interface design requiring stable component supply, RoHS-compliant packaging, and long-term industrial availability.
Supply support for MAX4685EBC+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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and consumer applications.
The MAX4684/MAX4685 product line was designed specifically for low-voltage, space-constrained analog signal routing in portable electronics - emphasizing ultra-low RON, minimal THD, and chip-scale packaging.
FAQ
What is the maximum supply voltage rating for MAX4685EBC+T?
The MAX4685EBC+T has an absolute maximum supply voltage (V+) of +6V, but its specified operating range is +1.8V to +5.5V. Operation above +5.5V is not guaranteed and may impact reliability or parametric performance. For robust design, keep V+ within the recommended range and observe derating curves for power dissipation at elevated temperatures.
Does MAX4685EBC+T support bidirectional analog signal flow?
Yes, the MAX4685EBC+T supports fully bidirectional analog signal routing on all COM_, NO_, and NC_ pins. Signals can pass from COM to NO/NC or vice versa without degradation, maintaining specified RON, THD, and bandwidth in either direction - a key requirement for audio and data multiplexing applications.
What is the thermal profile requirement for soldering MAX4685EBC+T's UCSP package?
The MAX4685EBC+T UCSP requires strict adherence to JEDEC J-STD-020A reflow profiles: infrared or vapor-phase soldering only, with preheating mandatory and peak bump temperature limited to +220°C (15s) or +215°C (60s). Hand or wave soldering is prohibited due to mechanical stress sensitivity of the chip-scale structure.
How does MAX4685EBC+T achieve 1.8V logic compatibility while operating from a +3.3V supply?
The MAX4685EBC+T integrates internal level-shifting circuitry that accepts logic inputs as low as 0.5V (VIL) and as high as 1.4V (VIH) - independent of V+. This allows direct connection to 1.8V GPIOs even when V+ = +3.3V, eliminating external level shifters and reducing BOM count in mixed-voltage systems.
Is MAX4685EBC+T pin-compatible with MAX4684EBC+T?
Yes, MAX4685EBC+T and MAX4684EBC+T share identical 12-bump UCSP pinout, electrical interface, and package dimensions. They differ only in internal RON symmetry: MAX4685EBC+T provides matched 0.8Ω NO/NC paths, while MAX4684EBC+T offers 0.5Ω NC / 0.8Ω NO. PCB layout and firmware remain unchanged when substituting between them.
MAX4685EBC+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- *
- Packaging:
- Product Status:
- Active
- Switch Circuit:
- -
- Multiplexer/Demultiplexer Circuit:
- -
- Number of Circuits:
- -
- On-State Resistance (Max):
- -
- Channel-to-Channel Matching (ΔRon):
- -
- Voltage - Supply, Single (V+):
- -
- Voltage - Supply, Dual (V±):
- -
- Switch Time (Ton, Toff) (Max):
- -
- -3db Bandwidth:
- -
- Charge Injection:
- -
- Channel Capacitance (CS(off), CD(off)):
- -
- Current - Leakage (IS(off)) (Max):
- -
- Crosstalk:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
MAX4685EBC+T FAQ
1.How can I place an order for MAX4685EBC+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4685EBC+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 MAX4685EBC+T reliable?
The price and inventory of MAX4685EBC+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4685EBC+T is usually 5 days.
3.What payment methods are accepted for MAX4685EBC+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4685EBC+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4685EBC+T?
MAX4685EBC+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4685EBC+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 MAX4685EBC+T?
For technical support, including MAX4685EBC+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4685EBC+T requirements.
6.How does Aetrix verify that MAX4685EBC+T is sourced from the original manufacturer or authorized distributors?
All MAX4685EBC+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 MAX4685EBC+T meets industry standards.
7.What is the process for return or replacement of MAX4685EBC+T?
All MAX4685EBC+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4685EBC+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 MAX4685EBC+T part is unused and in its original packaging.
Return procedure for MAX4685EBC+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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