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Analog Devices Inc./Maxim Integrated MAX4635ETB+T
- Part No.:
- MAX4635ETB+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
MAX4635ETB+T.pdf
- Description:
- IC SWITCH SPDT X 2 4OHM 10TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,486
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Product details
Overview
MAX4635ETB+T 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 3mm × 3mm thin QFN package.
For engineers reviewing the MAX4635ETB+T datasheet, MAX4635ETB+T pinout, MAX4635ETB+T application, or MAX4635ETB+T equivalent, key selection criteria include guaranteed on-resistance flatness (≤1Ω), break-before-make timing (≤1ns), low crosstalk (−67dB @ 1MHz), and compatibility with 1.8V logic interfaces while powered from 3.3V or 5V supplies.
Technical Context
The MAX4635ETB+T implements two independent SPDT switches using CMOS transmission-gate architecture with matched P/N channel pairs to ensure low RON and high linearity. Its inverted logic inputs (IN1/IN2) drive complementary gate signals directly-no external inverters required-enabling deterministic break-before-make switching with ≤1ns interval.
Signal paths support bidirectional rail-to-rail analog operation (0V to V+), with leakage currents ≤±0.3nA over −40°C to +85°C and THD of 0.1% across 20Hz–20kHz. Input logic thresholds are supply-independent up to +5.5V, allowing direct interfacing with 5V controllers even when V+ = 3.3V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-Resistance (max) | 4Ω at +5V supply - enables <10mV drop at 10mA signal current, critical for precision signal routing |
| On-Resistance Flatness (max) | 1Ω over full signal range at +5V - ensures consistent gain/attenuation across 0V to V+ analog swing |
| Turn-On Time (max) | 14ns - supports >30MHz digital signal multiplexing without edge degradation |
| Crosstalk (at 1MHz) | −67dB - prevents audible interference in stereo audio path switching |
| Off-Isolation (at 1MHz) | −65dB - blocks >99.8% of coupled noise between active and inactive channels |
| Supply Range | +1.8V to +5.5V - allows direct integration into Li-ion (3.0–3.7V) and USB-powered (5V) systems |
| Logic Compatibility | Inputs tolerate up to +5.5V regardless of V+ - eliminates level shifters when interfacing 5V microcontrollers |
Pinout & Package
MAX4635ETB+T is packaged in a 10-pin 3mm × 3mm thin QFN with exposed thermal pad (package code T1033-1 per Maxim). Pin 1 is marked by a dot; the exposed pad must be soldered to PCB ground for thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN1 | Inverted logic control for Switch 1 | Low = COM1 connected to NC1; High = COM1 connected to NO1 - no external inversion needed |
| 2 NO1 | Normally open terminal, Switch 1 | Open-circuit when IN1 = Low; connects to COM1 only when IN1 = High |
| 3 GND | Digital and analog ground reference | Must be low-impedance connection; shared return for all analog and digital currents |
| 4 NO2 | Normally open terminal, Switch 2 | Open-circuit when IN2 = Low; connects to COM2 only when IN2 = High |
| 5 IN2 | Inverted logic control for Switch 2 | Independent of IN1; enables asynchronous routing of two signal paths |
| 6 COM2 | Common terminal, Switch 2 | Bidirectional node - may serve as input or output depending on signal flow direction |
| 7 NC2 | Normally closed terminal, Switch 2 | Connected to COM2 when IN2 = Low; breaks before NO2 makes during transition |
| 8 V+ | Positive supply (1.8V–5.5V) | Power source for analog and digital sections; decoupling capacitor required within 5mm |
| 9 NC1 | Normally closed terminal, Switch 1 | Connected to COM1 when IN1 = Low; breaks before NO1 makes during transition |
| 10 COM1 | Common terminal, Switch 1 | Bidirectional node - may serve as input or output depending on signal flow direction |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail analog signal handling | Supports 0V to V+ input/output swing - preserves full dynamic range in audio and sensor interfaces |
| Guaranteed break-before-make | ≤1ns interval prevents momentary short between NO_ and NC_ - essential for avoiding signal glitches |
| Matched on-resistance between channels | ≤0.2Ω max mismatch - ensures identical insertion loss across dual-path applications like stereo channels |
| Low charge injection (2pC typ) | Minimizes voltage glitch on COM_ during switching - critical for sample-and-hold and precision ADC front-ends |
| −67dB crosstalk at 1MHz | Prevents audible bleed between left/right audio channels or adjacent sensor inputs |
| 1.8V logic-compatible control | Operates with 1.8V CMOS logic levels while powered from 3.3V or 5V - reduces system-level voltage translation |
Applications
| Audio Signal Routing | Low-Voltage Data Acquisition |
|---|---|
|
Use Scenario: Selecting between microphone inputs or routing line-level audio between codec and amplifier in portable media players. IC Role / Device Role / Timing Role: Dual SPDT switch providing isolated, low-distortion signal path selection with <0.1% THD. Use Value: Enables seamless stereo channel switching without pop/click artifacts due to low charge injection (2pC) and rail-to-rail operation. |
Use Scenario: Multiplexing multiple sensor outputs (e.g., temperature, pressure, humidity) into a single ADC channel in IoT edge nodes. IC Role / Device Role / Timing Role: Precision analog multiplexer with matched on-resistance (<0.2Ω) ensuring consistent gain across channels. Use Value: Eliminates calibration drift between channels; 4Ω max RON keeps series resistance error <0.05% at 10kΩ sensor impedance. |
| Sample-and-Hold Circuits | Relay Replacement in Portable Equipment |
|
Use Scenario: Isolating hold capacitor from input source during acquisition phase in precision instrumentation amplifiers. IC Role / Device Role / Timing Role: Fast-switching SPDT with 14ns tON and guaranteed break-before-make to prevent hold capacitor discharge. Use Value: Reduces aperture uncertainty to <15ps; low leakage (<0.3nA) maintains hold voltage accuracy over 10ms intervals. |
Use Scenario: Replacing electromechanical relays in battery-powered test equipment for signal path reconfiguration. IC Role / Device Role / Timing Role: Solid-state SPDT switch delivering zero-contact bounce, µA-level quiescent current, and 100MΩ off-isolation. Use Value: Extends battery life (I+ = 1µA max) and improves reliability vs. mechanical relays - no wear-out mechanism or coil power. |
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 |
|---|---|---|---|
| MAX4636ETB+T | Same package and pinout, but non-inverted logic (IN_ = High → COM_ to NO_) | Requires inverted control signals in existing MAX4635-based designs; otherwise functionally identical | Select MAX4636ETB+T only if system logic naturally drives active-high enable signals |
| TMUX6219RTER | 4.5Ω max RON at 5V, 16ns tON, no guaranteed break-before-make, 3.3V-only logic interface | Lacks deterministic break-before-make; requires level-shifting for 5V controller interfacing | Choose TMUX6219RTER only when lower cost outweighs need for glitch-free switching and 5V logic tolerance |
Compared with MAX4636ETB+T, the MAX4635ETB+T provides inverted logic control out-of-the-box, eliminating external inverters in microcontroller-driven systems; versus TMUX6219RTER, it delivers guaranteed break-before-make timing and 5.5V-tolerant inputs-critical for mixed-voltage industrial and portable designs.
Availability
MAX4635ETB+T is available at Aetrix Electronics and suitable for battery-powered equipment, audio/video signal routing, and low-voltage data-acquisition systems requiring stable component supply across extended production lifecycles.
Supply support for MAX4635ETB+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 U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, communications, and consumer applications.
The MAX4635/MAX4636 family was designed specifically for low-voltage, low-glitch analog signal routing in space-constrained portable electronics-emphasizing speed, linearity, and supply flexibility from 1.8V to 5.5V.
FAQ
What is the maximum supply voltage rating for the MAX4635ETB+T?
The MAX4635ETB+T has an absolute maximum supply voltage (V+) of +6V. Operation above +5.5V is not recommended, as electrical specifications are only guaranteed from +1.8V to +5.5V. Exceeding +6V risks permanent damage per the Absolute Maximum Ratings table.
Does the MAX4635ETB+T require external pull-up or pull-down resistors on its IN1 and IN2 pins?
No, the MAX4635ETB+T does not require external biasing on IN1 or IN2. Its CMOS inputs have leakage current ≤±100nA and defined logic thresholds (VIH = 2.4V min, VIL = 0.8V max at +5V supply), making them compatible with standard push-pull GPIOs without pull resistors.
Can the MAX4635ETB+T switch analog signals beyond the V+ rail?
No. The MAX4635ETB+T supports rail-to-rail analog operation only between GND and V+, with clamping diodes limiting NO_, NC_, and COM_ voltages to −0.3V to (V+ + 0.3V). Signals exceeding this range risk forward-biasing internal protection diodes and violating Absolute Maximum Ratings.
How does the on-resistance of the MAX4635ETB+T vary with temperature and supply voltage?
At +5V supply, MAX4635ETB+T RON increases from ~3.5Ω at +25°C to ~4.5Ω at +85°C. At +3V supply, RON rises to ~8Ω max over temperature. This variation is characterized in Figures MAX4636-02 and MAX4636-03 of the datasheet and remains within guaranteed 4Ω/+5V and 5.5Ω/+3V limits.
Is the exposed pad on the MAX4635ETB+T's thin QFN package electrically connected?
Yes-the exposed thermal pad on the MAX4635ETB+T (T1033-1 package) is internally connected to GND. It must be soldered to a PCB copper pour tied to the main GND plane to ensure proper thermal dissipation (1951mW max power dissipation at +70°C) and optimal EMI performance.
MAX4635ETB+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):
- 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-TDFN (3x3)
MAX4635ETB+T FAQ
1.How can I place an order for MAX4635ETB+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4635ETB+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 MAX4635ETB+T reliable?
The price and inventory of MAX4635ETB+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4635ETB+T is usually 5 days.
3.What payment methods are accepted for MAX4635ETB+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4635ETB+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4635ETB+T?
MAX4635ETB+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4635ETB+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 MAX4635ETB+T?
For technical support, including MAX4635ETB+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4635ETB+T requirements.
6.How does Aetrix verify that MAX4635ETB+T is sourced from the original manufacturer or authorized distributors?
All MAX4635ETB+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 MAX4635ETB+T meets industry standards.
7.What is the process for return or replacement of MAX4635ETB+T?
All MAX4635ETB+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4635ETB+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 MAX4635ETB+T part is unused and in its original packaging.
Return procedure for MAX4635ETB+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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