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Analog Devices Inc./Maxim Integrated MAX4735ETE+
- Part No.:
- MAX4735ETE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-WFQFN Exposed Pad
- Datasheet:
-
MAX4735ETE+.pdf
- Description:
- IC SWITCH SPDTX2 400MOHM 16TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,465
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Product details
Overview
MAX4735ETE+ from Maxim Integrated is a low-voltage, quad-SPDT analog switch optimized for audio signal routing in portable electronics. It delivers 0.31Ω typical on-resistance, <0.02% THD into 8Ω loads, and break-before-make switching, enabling clean speaker multiplexing in space-constrained designs.
For engineers reviewing the MAX4735ETE+ datasheet, MAX4735ETE+ pinout, MAX4735ETE+ application, or MAX4735ETE+ equivalent, key selection criteria include on-resistance flatness (0.06Ω), THD+N performance at 32Ω (0.015%), rail-to-rail analog signal range (0 to VCC), and 1.8V logic compatibility across its -40°C to +85°C operating range.
Technical Context
The MAX4735ETE+ implements four independent SPDT switches controlled by two digital inputs (INA, INB), each toggling two switch pairs. Its fully bidirectional CMOS architecture supports both multiplexing and demultiplexing with guaranteed break-before-make timing (2ns min) and rail-to-rail analog signal handling (0 to VCC).
It operates from a single 1.6V–3.6V supply, features internal diode clamping on all analog pins, and maintains tight on-resistance matching (0.015Ω) and flatness (0.06Ω) over temperature and signal voltage - critical for low-distortion audio path switching.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-resistance (RON) | 0.31Ω typical at VCC = 2.7V, 100mA - enables <0.02% THD into 8Ω speakers without external buffering |
| On-resistance flatness | 0.06Ω typical - minimizes harmonic distortion across full analog signal swing (0 to VCC) |
| THD+N (8Ω load) | 0.02% typical, f = 20Hz–20kHz - meets high-fidelity audio routing requirements in mobile handsets |
| Supply voltage range | 1.6V to 3.6V - compatible with single-cell Li-ion and Li-poly battery systems |
| Logic compatibility | 1.8V input threshold - ensures reliable control from low-voltage baseband or application processors |
| Off-isolation | -66dB at 100kHz - suppresses crosstalk between active and inactive audio channels |
| Turn-on/turn-off time | 40ns/20ns typical - supports fast channel switching in ringtone/melody IC routing applications |
Pinout & Package
MAX4735ETE+ is housed in a 16-pin, 3mm × 3mm × 0.8mm TQFN package with exposed paddle (EP) connected to GND for thermal and EMI performance. Pin 1 is located at top-left corner adjacent to notch-marked corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| INA | Digital control input A | Drives switches 1 & 2: low → COM1↔NC1 / COM2↔NC2; high → COM1↔NO1 / COM2↔NO2 |
| INB | Digital control input B | Drives switches 3 & 4: low → COM3↔NC3 / COM4↔NC4; high → COM3↔NO3 / COM4↔NO4 |
| COM1–COM4 | Common terminals | Bidirectional analog signal path hubs - connect to codec, amplifier, or transducer |
| NO1–NO4 | Normally open terminals | Active when corresponding IN_ is high; support speaker output or auxiliary audio path routing |
| NC1–NC4 | Normally closed terminals | Active when corresponding IN_ is low; used for default paths (e.g., earpiece, primary speaker) |
| VCC | Positive supply | 1.6V–3.6V analog/digital power rail; requires local 0.1µF ceramic bypass to GND |
| GND | Ground reference | Return path for analog signals and digital logic; must be tied to exposed paddle (EP) |
| EP (Pad) | Exposed thermal pad | Internally connected to GND - improves thermal dissipation and reduces ground impedance |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail analog signal range | 0V to VCC - eliminates clipping when switching line-level or speaker-level audio signals |
| Break-before-make switching | 2ns minimum interval - prevents momentary short-circuits during channel transitions |
| Low charge injection | 100pC - minimizes audible pop/click artifacts during dynamic audio path reconfiguration |
| High off-isolation | -66dB at 100kHz - isolates inactive speaker paths to prevent bleed-through in multi-output systems |
| Low on-capacitance mismatch | 250pF COM_ON, 70pF NO_OFF - preserves high-frequency audio integrity and reduces crosstalk |
Applications
| Cell Phone Audio Routing | Digital Still Camera Speaker Switching |
|---|---|
Use Scenario: Dynamically routes ringtone, voice call, and media playback audio between earpiece, loudspeaker, and headset outputs. IC Role / Device Role / Timing Role: Quad-SPDT analog switch providing concurrent dual-path selection under baseband processor control. Use Value: Enables single audio codec to drive multiple transducers without external amplifiers or relays, reducing BOM count and PCB area. |
Use Scenario: Switches between built-in mono speaker and external stereo headphone jack during video playback or shutter sound feedback. IC Role / Device Role / Timing Role: Low-distortion analog multiplexer selecting between 8Ω speaker and 32Ω headphones based on accessory detection logic. Use Value: Delivers 0.015% THD into 32Ω loads while maintaining <0.02% THD into 8Ω - eliminating need for separate driver stages. |
| MP3 Player Output Multiplexing | PDA Audio Path Management |
Use Scenario: Routes decoded audio from DSP core to either internal speaker or line-out connector depending on user mode (standalone vs. docked). IC Role / Device Role / Timing Role: Bidirectional SPDT switch supporting simultaneous playback and recording path isolation. Use Value: Achieves -86dB crosstalk at 100kHz - prevents microphone input contamination from speaker output leakage. |
Use Scenario: Manages shared audio interface between voice recorder, alarm buzzer, and notification melody generator in resource-constrained palmtop devices. IC Role / Device Role / Timing Role: Four independent SPDT switches configured as dual-DPDT to isolate conflicting analog sources. Use Value: Guarantees 0.45Ω max RON over -40°C to +85°C - ensures consistent volume and distortion performance across industrial temperature range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4736ETE+ | Same quad-SPDT topology but rated for 1.8V–5.5V supply; higher RON (0.5Ω typ) and THD (0.03% @ 8Ω) | Targeted at wider-supply industrial systems where 3.6V ceiling is insufficient | Select MAX4736ETE+ only if system VCC exceeds 3.6V; otherwise MAX4735ETE+ offers superior audio fidelity at lower voltage |
| TS5A23157DGSR | Single dual-SPDT, 0.9Ω RON, 0.05% THD @ 32Ω, 1.65V–5.5V operation | Requires two devices to match quad functionality; lacks integrated break-before-make guarantee | Use TS5A23157DGSR only in cost-sensitive, non-audio-critical applications where layout area is not constrained |
Compared with MAX4736ETE+ and TS5A23157DGSR, the MAX4735ETE+ uniquely combines sub-0.35Ω RON, <0.02% THD into 8Ω, and guaranteed break-before-make in a 3mm × 3mm footprint - making it the optimal choice for high-fidelity, space-limited portable audio routing.
Availability
MAX4735ETE+ is available at Aetrix Electronics and suitable for cell phone audio routing, digital still camera speaker switching, MP3 player output multiplexing, PDA audio path management, and portable medical device audio interfaces requiring stable component supply and long-term lifecycle support.
Supply support for MAX4735ETE+ 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 MAX4735ETE+ belongs to Maxim's low-voltage analog switch product line, engineered specifically for distortion-sensitive audio signal routing in battery-powered portable devices operating down to 1.6V.
FAQ
What is the maximum continuous current rating per channel for the MAX4735ETE+?
The MAX4735ETE+ supports ±300mA continuous current on each NO_, NC_, and COM_ terminal. This rating allows direct driving of 8Ω loudspeakers up to 2.3VRMS without external amplification, provided peak currents remain within the 400mA/50% duty cycle limit specified in the Absolute Maximum Ratings table.
Does the MAX4735ETE+ require external pull-up or pull-down resistors on INA and INB inputs?
No, the MAX4735ETE+ does not require external pull-up or pull-down resistors on INA and INB. These inputs are internally diode-clamped to GND and operate reliably with 1.8V logic levels. Driving them directly from baseband processor GPIOs - without additional biasing - ensures correct switch state control across the full -40°C to +85°C temperature range.
Can the MAX4735ETE+ be used to switch differential audio signals?
The MAX4735ETE+ is not designed for differential signal switching. Each switch channel is single-ended, with independent COM/NO/NC paths referenced to system GND. For differential audio (e.g., I²S, PDM), separate matched switches per polarity or dedicated differential analog switches like the MAX4738 are required to maintain common-mode rejection and signal integrity.
How does the exposed thermal pad (EP) on the MAX4735ETE+ TQFN package affect PCB layout?
The exposed pad (EP) of the MAX4735ETE+ must be soldered to a solid GND copper pour on the PCB to ensure thermal stability and low-impedance grounding. A minimum of 9 solder paste vias (0.3mm diameter, spaced ≤1mm apart) connecting EP to inner-layer GND planes is recommended to achieve the 64°C/W θJA specified in the datasheet and prevent thermal derating above +70°C ambient.
Is the MAX4735ETE+ pin-compatible with the MAX4735EUE+ TSSOP variant?
Yes, the MAX4735ETE+ (TQFN) and MAX4735EUE+ (TSSOP) share identical pin numbering, function mapping, and electrical specifications. Both packages use the same 16-pin layout with INA on pin 1 (TQFN) / pin 15 (TSSOP), VCC on pin 16 (TQFN) / pin 1 (TSSOP), and GND on pin 8 (TQFN) / pin 16 (TSSOP) - enabling drop-in replacement where board space or thermal requirements differ.
MAX4735ETE+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- Switch Circuit:
- SPDT
- Multiplexer/Demultiplexer Circuit:
- 4:2
- Number of Circuits:
- 2
- On-State Resistance (Max):
- 400mOhm
- Channel-to-Channel Matching (ΔRon):
- 15mOhm
- Voltage - Supply, Single (V+):
- 1.6V ~ 3.6V
- Voltage - Supply, Dual (V±):
- -
- Switch Time (Ton, Toff) (Max):
- 200ns, 180ns
- -3db Bandwidth:
- 20MHz
- Charge Injection:
- 100pC
- Channel Capacitance (CS(off), CD(off)):
- -
- Current - Leakage (IS(off)) (Max):
- 20nA
- Crosstalk:
- -86dB @ 100kHz
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TQFN (3x3)
MAX4735ETE+ FAQ
1.How can I place an order for MAX4735ETE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4735ETE+ 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 MAX4735ETE+ reliable?
The price and inventory of MAX4735ETE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4735ETE+ is usually 5 days.
3.What payment methods are accepted for MAX4735ETE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4735ETE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4735ETE+?
MAX4735ETE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4735ETE+ 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 MAX4735ETE+?
For technical support, including MAX4735ETE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4735ETE+ requirements.
6.How does Aetrix verify that MAX4735ETE+ is sourced from the original manufacturer or authorized distributors?
All MAX4735ETE+ 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 MAX4735ETE+ meets industry standards.
7.What is the process for return or replacement of MAX4735ETE+?
All MAX4735ETE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX4735ETE+, 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 MAX4735ETE+ part is unused and in its original packaging.
Return procedure for MAX4735ETE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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