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Analog Devices Inc./Maxim Integrated MAX4635EUB+
- Part No.:
- MAX4635EUB+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX4635EUB+.pdf
- Description:
- IC SWITCH SPDT X 2 4OHM 10UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:2,455
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Product details
Overview
MAX4635EUB+ from Maxim Integrated is a dual single-pole/double-throw (SPDT) CMOS analog switch with 4Ω max on-resistance at +5V, 14ns max turn-on time, and rail-to-rail signal handling from +1.8V to +5.5V supply. It features inverted logic control, operates in battery-powered audio routing and low-voltage data-acquisition systems, and is housed in a 10-pin µMAX package.
For engineers reviewing the MAX4635EUB+ datasheet, MAX4635EUB+ pinout, MAX4635EUB+ application, or MAX4635EUB+ equivalent, this page delivers verified electrical specs, truth-table–aligned pin functions, real-world switching performance metrics, and substitution guidance grounded in manufacturer-specified functional equivalence and supply-voltage compatibility.
Technical Context
The MAX4635EUB+ implements two independent SPDT switches using CMOS process technology, with guaranteed break-before-make timing (1ns max) and bidirectional analog signal paths. Its inverted logic architecture means INx = LOW selects NCx, while INx = HIGH selects NOx - directly contrasting the MAX4636's non-inverted behavior.
It supports rail-to-rail analog operation (0V to V+) with <1Ω on-resistance flatness at +5V and −67dB crosstalk at 1MHz. Input logic thresholds are compatible with 5V TTL/CMOS signals even when V+ = +3.3V, eliminating external level shifters in mixed-supply systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-Resistance (max) | 4Ω at +5V supply - enables ≤10mA continuous current per channel without significant voltage drop |
| On-Resistance Match | 0.2Ω max between channels - ensures matched gain/attenuation in differential or dual-path signal routing |
| Turn-On / Turn-Off Time | 14ns / 6ns max - supports high-speed multiplexing in >30MHz sample-and-hold or communications switching |
| Rail-to-Rail Signal Range | 0V to V+ - preserves full dynamic range of baseband audio, sensor, or DAC output signals |
| Off-Isolation | −65dB at 1MHz - suppresses leakage between active and inactive signal paths in multi-channel AFEs |
| Crosstalk | −67dB at 1MHz - prevents audible or measurable coupling between adjacent switched audio/video channels |
| Supply Voltage Range | +1.8V to +5.5V - allows direct integration into Li-ion (3.0–3.7V), USB-powered (5V), and ultra-low-power MCU subsystems |
Pinout & Package
MAX4635EUB+ uses the 10-pin µMAX package (3.0mm × 3.0mm × 0.8mm, no exposed pad), specified for −40°C to +85°C operation. Pin 1 is marked by a dot; pin numbering follows standard counter-clockwise orientation from top-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN1 | Inverted logic control for Switch 1 | LOW → connects COM1 to NC1; HIGH → connects COM1 to NO1; compatible with 5V logic regardless of V+ |
| 2 NO1 | Normally open terminal, Switch 1 | Open-circuit when IN1 = LOW; forms conductive path to COM1 only when IN1 = HIGH |
| 3 GND | Analog/digital ground reference | Return path for all analog signals and digital inputs; must be low-impedance for THD & crosstalk performance |
| 4 NO2 | Normally open terminal, Switch 2 | Open-circuit when IN2 = LOW; forms conductive path to COM2 only when IN2 = HIGH |
| 5 IN2 | Inverted logic control for Switch 2 | Independent of IN1; enables asynchronous dual-channel switching without shared control logic |
| 6 COM2 | Common terminal, Switch 2 | Bidirectional node - may serve as input (to NO2/NC2) or output (from NO2/NC2) |
| 7 NC2 | Normally closed terminal, Switch 2 | Connected to COM2 when IN2 = LOW; open when IN2 = HIGH |
| 8 V+ | Positive supply input | Single supply rail powering both analog switch core and logic interface; accepts +1.8V to +5.5V |
| 9 NC1 | Normally closed terminal, Switch 1 | Connected to COM1 when IN1 = LOW; open when IN1 = HIGH |
| 10 COM1 | Common terminal, Switch 1 | Bidirectional node - may serve as input (to NO1/NC1) or output (from NO1/NC1) |
Key Features
| Feature | Design Value |
|---|---|
| Inverted logic control | Eliminates need for external inverters when interfacing with active-HIGH microcontroller GPIOs driving NC-critical fail-safe paths |
| Guaranteed break-before-make | 1ns max interval prevents momentary shorting between NO and NC terminals during state transitions - critical for relay replacement |
| Rail-to-rail analog range | Supports full-scale signal passage from 0V to V+ without clipping, enabling direct connection to op-amp outputs or ADC inputs |
| Low charge injection (2pC typ) | Minimizes voltage glitch on high-impedance nodes (e.g., sample capacitors), preserving accuracy in precision data acquisition |
| −67dB crosstalk at 1MHz | Enables simultaneous switching of stereo audio or dual-channel sensor signals without audible or measurable inter-channel interference |
Applications
| Audio Signal Routing | Low-Voltage Data Acquisition |
|---|---|
|
Use Scenario: Selecting between multiple microphone inputs or headphone outputs in portable audio devices. IC Role / Device Role / Timing Role: Dual SPDT analog switch providing channel-select functionality with sub-15ns switching and rail-to-rail support for ±2.5V audio swing. Use Value: Enables zero-crossing–aware mute/unmute and source selection without pop/click artifacts due to low charge injection and fast settling. |
Use Scenario: Multiplexing sensor outputs (e.g., thermistor, RTD, strain gauge) into a single ADC input in battery-powered IoT nodes. IC Role / Device Role / Timing Role: Low-leakage (<0.3nA off-state), low-RON analog switch routing high-impedance sensor signals with minimal gain error. Use Value: Maintains measurement accuracy across temperature ranges by guaranteeing ≤0.2Ω RON match and <1Ω flatness over full signal span. |
| Relay Replacement | Sample-and-Hold Circuits |
|
Use Scenario: Replacing electromechanical relays in industrial control I/O modules where size, power, and lifetime are constraints. IC Role / Device Role / Timing Role: Solid-state SPDT switch delivering 30mA continuous current handling and 100k-cycle reliability without contact wear. Use Value: Reduces PCB area by >90% vs. miniature relays and eliminates coil drive circuitry, lowering BOM count and standby power. |
Use Scenario: Isolating hold capacitor from input source during acquisition phase in precision instrumentation amplifiers. IC Role / Device Role / Timing Role: Fast, low-charge-injection switch controlling sampling aperture with 14ns tON and 2pC Q. Use Value: Limits sampling error to <0.01% FS in 16-bit systems by minimizing droop and pedestal error during hold-phase transitions. |
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 |
|---|---|---|---|
| MAX4636EUB+ | Non-inverted logic (INx = HIGH → NOx); identical RON, speed, and package | Requires inverted control signals or external inverters when replacing MAX4635EUB+ in existing layouts | Select MAX4636EUB+ only if system logic naturally drives active-HIGH select lines and NC-first default state is not required |
| TMUX6219RSVR | 4.5Ω RON at 5V, 16ns tON, +1.8V to +5.5V, but uses 10-pin WQFN (3×3mm, exposed pad) | Higher thermal dissipation capability; requires PCB redesign due to different pad layout and solder mask requirements | Prefer TMUX6219RSVR for thermally constrained designs needing >1951mW PD or enhanced long-term reliability under sustained load |
Compared with MAX4635EUB+, MAX4636EUB+ offers identical analog performance but reversed logic polarity - requiring firmware or gate-level adaptation - while TMUX6219RSVR provides comparable switching specs in a thermally superior package but mandates layout revision and requalification.
Availability
MAX4635EUB+ is available at Aetrix Electronics and suitable for battery-powered equipment, audio signal routing, and low-voltage data-acquisition systems requiring stable component supply, long-lifecycle assurance, and traceable sourcing.
Supply support for MAX4635EUB+ 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, communications, and consumer applications.
The MAX4635/MAX4636 family targets low-voltage, high-speed analog signal routing in space-constrained, power-sensitive systems - emphasizing rail-to-rail operation, low distortion, and logic-voltage flexibility.
FAQ
What is the logic polarity of MAX4635EUB+?
The MAX4635EUB+ uses inverted logic: an INx pin driven LOW connects COMx to NCx, while HIGH connects COMx to NOx. This differs from the MAX4636EUB+, which uses non-inverted logic. The MAX4635EUB+ datasheet confirms this behavior in its truth table and pin description section, and it applies across the full −40°C to +85°C operating range.
Can MAX4635EUB+ operate with a +3.3V supply and interface to 5V logic inputs?
Yes. MAX4635EUB+ logic inputs (IN1, IN2) tolerate voltages up to +5.5V independent of V+, allowing direct connection to 5V microcontrollers or FPGAs even when powered from +3.3V. This is explicitly stated in the Applications Information section and verified in the Electrical Characteristics tables for +3V supply conditions.
What is the maximum continuous current per channel for MAX4635EUB+?
The MAX4635EUB+ supports ±30mA continuous current into any terminal (COM, NO, or NC), as specified in the Absolute Maximum Ratings table. At typical +5V operation and 4Ω RON, this corresponds to ≤120mW power dissipation per channel - well within the 330mW µMAX package limit at +70°C ambient.
Does MAX4635EUB+ require external protection diodes for overvoltage tolerance?
External diodes are recommended only if analog signals may exceed V+ by >0.3V or dip below GND - per Absolute Maximum Ratings. The internal ESD diodes clamp such excursions but are rated for ≤30mA continuous forward current. Figure 5 in the MAX4635EUB+ datasheet shows optional D1/D2 placement for robust overvoltage protection in harsh environments.
How does on-resistance flatness impact audio performance in MAX4635EUB+?
MAX4635EUB+ guarantees ≤1Ω on-resistance flatness over the full 0V to V+ signal range at +5V, meaning RON varies by <1Ω across the entire audio waveform. This minimizes harmonic distortion (THD = 0.1%) and preserves frequency response linearity - critical for high-fidelity audio routing where amplitude-dependent gain variation causes audible coloration.
MAX4635EUB+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Active
- Switch Circuit:
- SPDT
- Multiplexer/Demultiplexer Circuit:
- 2:1
- Number of Circuits:
- 2
- On-State Resistance (Max):
- 4Ohm
- Channel-to-Channel Matching (ΔRon):
- 100mOhm
- Voltage - Supply, Single (V+):
- 1.8V ~ 5.5V
- Voltage - Supply, Dual (V±):
- -
- Switch Time (Ton, Toff) (Max):
- 14ns, 6ns
- -3db Bandwidth:
- -
- Charge Injection:
- 2pC
- Channel Capacitance (CS(off), CD(off)):
- 9pF
- Current - Leakage (IS(off)) (Max):
- 100pA
- Crosstalk:
- -67dB @ 1MHz
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-uMAX/uSOP
MAX4635EUB+ FAQ
1.How can I place an order for MAX4635EUB+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4635EUB+ 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 MAX4635EUB+ reliable?
The price and inventory of MAX4635EUB+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4635EUB+ is usually 5 days.
3.What payment methods are accepted for MAX4635EUB+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4635EUB+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4635EUB+?
MAX4635EUB+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4635EUB+ 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 MAX4635EUB+?
For technical support, including MAX4635EUB+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4635EUB+ requirements.
6.How does Aetrix verify that MAX4635EUB+ is sourced from the original manufacturer or authorized distributors?
All MAX4635EUB+ 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 MAX4635EUB+ meets industry standards.
7.What is the process for return or replacement of MAX4635EUB+?
All MAX4635EUB+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX4635EUB+, 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 MAX4635EUB+ part is unused and in its original packaging.
Return procedure for MAX4635EUB+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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