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Analog Devices Inc./Maxim Integrated MAX4685EUB+T
- Part No.:
- MAX4685EUB+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX4685EUB+T.pdf
- Description:
- IC SWITCH SPDTX2 800MOHM 10UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:610
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Product details
Overview
MAX4685EUB+T from Maxim Integrated is a dual SPDT analog switch IC designed for low-voltage signal routing in portable and battery-powered systems. It delivers 0.8Ω max on-resistance (NO/NC) at +2.7V, 50ns turn-on time, 40ns turn-off time, and operates from +1.8V to +5.5V - enabling rail-to-rail audio/video signal switching in space-constrained handheld devices.
For engineers reviewing the MAX4685EUB+T datasheet, MAX4685EUB+T pinout, MAX4685EUB+T application, or MAX4685EUB+T equivalent, key selection criteria include guaranteed RON matching (≤0.06Ω), ultra-low leakage (±1nA at +25°C), 1.8V logic compatibility, and μMAX® package compatibility with legacy PCB footprints.
Technical Context
The MAX4685EUB+T implements break-before-make switching with 2ns typical delay to prevent signal shorting during state transitions. Its BiCMOS process enables symmetrical 0.8Ω max RON for both NO and NC paths across the full +1.8V to +5.5V supply range, supporting bidirectional analog signal routing without polarity constraints.
It features 1.8V logic-compatible digital inputs that accept up to +5.5V regardless of V+, allowing direct interfacing with mixed-voltage microcontrollers. The device maintains <0.35Ω RON flatness over the entire signal range (GND to V+) and achieves -64dB off-isolation at 100kHz - critical for high-fidelity audio path integrity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| RON (NO/NC) | 0.8Ω max at +2.7V - ensures minimal insertion loss in audio/video signal paths |
| RON Match | ≤0.06Ω between channels - enables precise differential signal routing without gain mismatch |
| tON/tOFF | 50ns/40ns max at +3V - supports fast multiplexing in real-time communication circuits |
| Supply Range | +1.8V to +5.5V - allows direct operation from Li-ion, 3.3V, or 5V rails without level shifting |
| Leakage Current | ±1nA max at +25°C - preserves signal integrity in high-impedance sensor or bias networks |
| Off-Isolation | -64dB at 100kHz - suppresses crosstalk between active and inactive signal paths |
| THD | 0.03% - maintains fidelity in line-level audio applications without audible distortion |
Pinout & Package
The MAX4685EUB+T uses a 10-pin μMAX® package (3mm × 3mm), RoHS-compliant and compatible with standard surface-mount assembly processes. Its compact footprint supports high-density PCB layouts while maintaining thermal performance via exposed pad connection to ground (EP pin not present in μMAX variant).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 (V+) | Positive Supply Input | Accepts +1.8V to +5.5V; powers internal switch array and logic core |
| 2 (NO1) | Analog Output - Normally Open Path 1 | Connects to COM1 when IN1 = logic low; bidirectional signal terminal |
| 3 (COM1) | Analog Common Terminal 1 | Primary signal I/O node for first SPDT switch; handles ±300mA continuous current |
| 4 (IN1) | Digital Control Input 1 | 1.8V logic-compatible; drives first switch; accepts up to +5.5V regardless of V+ |
| 5 (NC1) | Analog Output - Normally Closed Path 1 | Connects to COM1 when IN1 = logic high; default path before control assertion |
| 6 (GND) | Ground Reference | System return for analog and digital domains; must be low-impedance for THD performance |
| 7 (NC2) | Analog Output - Normally Closed Path 2 | Connects to COM2 when IN2 = logic high; independent second SPDT channel |
| 8 (IN2) | Digital Control Input 2 | Independent control for second switch; identical electrical specs to IN1 |
| 9 (COM2) | Analog Common Terminal 2 | Second independent signal I/O node; fully isolated from COM1 |
| 10 (NO2) | Analog Output - Normally Open Path 2 | Connects to COM2 when IN2 = logic low; completes dual-channel routing capability |
Key Features
| Feature | Design Value |
|---|---|
| Symmetrical RON | 0.8Ω max for both NO and NC paths - eliminates channel-dependent gain error in stereo routing |
| Rail-to-rail signal handling | Supports analog signals from GND to V+ - enables full-swing audio and video without clipping |
| Break-before-make timing | 2ns typical delay - prevents momentary short-circuit between NO/NC paths during switching |
| Low charge injection | 200pC max - minimizes voltage glitch on high-impedance nodes during switching transients |
| 1.8V logic compatibility | VIH = 1.4V, VIL = 0.5V - interfaces directly with modern low-voltage MCUs without level shifters |
Applications
| Speaker Headset Switching | MP3 Player Signal Routing |
|---|---|
Use Scenario: Dynamically selecting between internal speaker and 3.5mm headset jack in portable audio devices. IC Role / Device Role / Timing Role: Dual SPDT analog switch routing audio output paths under MCU control. Use Value: 0.8Ω RON ensures negligible attenuation; -64dB off-isolation prevents audible crosstalk between speaker and headphone outputs. |
Use Scenario: Multiplexing stereo line-out, microphone input, and auxiliary codec signals in flash-based music players. IC Role / Device Role / Timing Role: Low-distortion signal path selector enabling shared ADC/DAC resources across multiple peripherals. Use Value: 0.03% THD preserves audio fidelity; 50ns tON supports rapid source switching without audible artifacts. |
| Battery-Operated Equipment | Cellular Phone Audio Management |
Use Scenario: Power-aware signal routing in medical sensors or handheld test equipment powered by coin cells or Li-ion batteries. IC Role / Device Role / Timing Role: Ultra-low-leakage (±1nA) analog switch enabling long standby times without signal path degradation. Use Value: 50nA max supply current extends battery life; +1.8V minimum supply allows operation down to single-cell discharge voltage. |
Use Scenario: Managing audio paths between baseband processor, earpiece, loudspeaker, and Bluetooth interface in GSM/WCDMA handsets. IC Role / Device Role / Timing Role: High-reliability analog switch supporting simultaneous voice call and background audio playback. Use Value: Break-before-make action prevents pop/click during call handover; -68dB crosstalk isolates sensitive RF sections from audio noise. |
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 |
|---|---|---|---|
| MAX4685EBC+T | 12-bump UCSP (2.0mm × 1.5mm) vs. 10-pin μMAX® (3.0mm × 3.0mm); same RON, timing, and logic specs | Requires new PCB layout due to different footprint and solder bump pitch (0.5mm) | Select for ultra-compact designs where board area is constrained and reflow profile supports UCSP |
| TS5A23157DGSR | 0.9Ω RON max, 65ns tON, -60dB off-isolation; TI's 10-pin VSSOP package | Higher RON and lower isolation limit use in high-fidelity audio; VSSOP footprint differs from μMAX® | Consider only if μMAX® footprint is unavailable and 0.1Ω RON tolerance and -4dB isolation margin are acceptable |
Compared with MAX4685EBC+T, the MAX4685EUB+T offers drop-in compatibility with existing μMAX®-based designs but occupies more PCB area; versus TS5A23157DGSR, it delivers tighter RON matching and superior isolation essential for premium audio routing.
Availability
MAX4685EUB+T is available at Aetrix Electronics and suitable for speaker headset switching, MP3 player signal routing, and battery-operated equipment requiring stable component supply across industrial temperature ranges (-40°C to +85°C).
Supply support for MAX4685EUB+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 precision analog, mixed-signal, and power management ICs for industrial, communications, and consumer applications.
The MAX4684/MAX4685 product line was engineered for low-voltage, low-distortion analog signal routing in portable electronics - prioritizing RON symmetry, rail-to-rail operation, and minimal power consumption.
FAQ
What is the maximum supply voltage rating for MAX4685EUB+T?
The MAX4685EUB+T has an absolute maximum supply voltage (V+) of +6V, though its specified operating range is +1.8V to +5.5V. Exceeding +6V risks permanent damage per the Absolute Maximum Ratings table. For reliable long-term operation, maintain V+ within the 1.8V–5.5V range, where all electrical characteristics - including 0.8Ω RON and 50ns tON - are guaranteed across -40°C to +85°C.
Does MAX4685EUB+T support bidirectional signal flow?
Yes, the MAX4685EUB+T supports fully bidirectional analog signal routing on all NO_, NC_, and COM_ pins. Its CMOS architecture imposes no directionality constraint: signals may enter or exit any terminal, enabling flexible PCB layout in audio/video multiplexing. This is confirmed by the "Analog Signal Levels" section stating signals ranging from GND to V+ pass with minimal RON variation, and by the functional diagram showing symmetric switch topology for both MAX4684 and MAX4685 variants.
What is the logic voltage compatibility of MAX4685EUB+T inputs?
The MAX4685EUB+T digital inputs (IN1, IN2) are 1.8V logic-compatible with VIH = +1.4V (min) and VIL = +0.5V (max) when V+ is +2.7V to +3.3V. Critically, they tolerate up to +5.5V regardless of supply voltage - meaning a +5V microcontroller can drive IN1/IN2 directly without level-shifting circuitry. This is explicitly stated in the Applications Information section and verified in the Electrical Characteristics table under DIGITAL I/O parameters.
How does MAX4685EUB+T handle power-supply sequencing?
Proper sequencing requires applying V+ before analog signals to avoid latch-up or excessive leakage. If analog signals arrive first - especially uncurrent-limited ones - external protection diodes (e.g., Figure 1) are recommended. The MAX4685EUB+T includes internal clamping diodes, but forward current must stay below rated limits. This guidance is detailed in the "Power-Supply Sequencing and Overvoltage Protection" section and applies identically to all MAX4684/MAX4685 variants, including MAX4685EUB+T.
Is MAX4685EUB+T pin-compatible with MAX4684EUB+T?
Yes, MAX4685EUB+T and MAX4684EUB+T share identical 10-pin μMAX® packaging, pinout, and footprint. Both have V+ on pin 1, NO1 on pin 2, COM1 on pin 3, IN1 on pin 4, NC1 on pin 5, GND on pin 6, NC2 on pin 7, IN2 on pin 8, COM2 on pin 9, and NO2 on pin 10. The sole functional difference is RON asymmetry (MAX4684) vs. symmetry (MAX4685); thus, MAX4685EUB+T can replace MAX4684EUB+T in designs requiring matched NO/NC resistance, provided the 0.8Ω max RON meets system requirements.
MAX4685EUB+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Switch Circuit:
- SPDT
- 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, 37pF
- 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-uMAX/uSOP
MAX4685EUB+T FAQ
1.How can I place an order for MAX4685EUB+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4685EUB+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 MAX4685EUB+T reliable?
The price and inventory of MAX4685EUB+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4685EUB+T is usually 5 days.
3.What payment methods are accepted for MAX4685EUB+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4685EUB+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4685EUB+T?
MAX4685EUB+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4685EUB+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 MAX4685EUB+T?
For technical support, including MAX4685EUB+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4685EUB+T requirements.
6.How does Aetrix verify that MAX4685EUB+T is sourced from the original manufacturer or authorized distributors?
All MAX4685EUB+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 MAX4685EUB+T meets industry standards.
7.What is the process for return or replacement of MAX4685EUB+T?
All MAX4685EUB+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4685EUB+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 MAX4685EUB+T part is unused and in its original packaging.
Return procedure for MAX4685EUB+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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