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Analog Devices Inc./Maxim Integrated MAX4758ETX+
- Part No.:
- MAX4758ETX+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 36-WFQFN Exposed Pad
- Datasheet:
-
MAX4758ETX+.pdf
- Description:
- IC SWITCH DPDTX4 850MOHM 36TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:774
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Product details
Overview
MAX4758ETX+ from Maxim Integrated is a quad double-pole/double-throw (DPDT) analog switch IC designed for high-fidelity audio and low-distortion signal routing in portable electronics. It features eight 0.5Ω on-resistance switches, rail-to-rail signal handling from 0V to V+, ±300mA continuous current per channel, and operates from a single +1.8V to +5.5V supply. It is used in speaker-headset switching and audio-signal routing in cellular phones and notebook computers.
For engineers reviewing the MAX4758ETX+ datasheet, MAX4758ETX+ pinout, MAX4758ETX+ application, or MAX4758ETX+ equivalent, this page delivers verified electrical parameters, package mapping to the 36-pin thin QFN (6mm × 6mm), functional pin roles, real-world audio/data routing use cases, and two confirmed alternative parts with documented technical and application differences.
Technical Context
The MAX4758ETX+ integrates eight matched DPDT analog switches controlled by four logic inputs (INA–IND), each pair sharing one control line. All eight switches are optimized for audio: guaranteed 0.5Ω on-resistance (typ. 0.2Ω flatness, 0.1Ω channel-to-channel matching), 0.03% THD at 20Hz–20kHz, and 102MHz on-channel –3dB bandwidth.
Unlike the MAX4759, the MAX4758ETX+ contains no low-capacitance data switches - all eight channels share identical audio-grade specifications. Its CMOS architecture supports rail-to-rail analog signals, mixed-voltage logic inputs (up to +5.5V), and break-before-make timing (2ns typical) to prevent signal shorting during switching.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-resistance (RON) | 0.5Ω max at V+ = 2.7V, 10mA - ensures minimal insertion loss and voltage drop in audio paths |
| On-resistance flatness | 0.2Ω max - maintains consistent gain across full analog signal range (0V to V+) |
| Channel matching (ΔRON) | 0.1Ω max - enables precise stereo balance and differential signal integrity |
| Total harmonic distortion | 0.03% typ. at 1VP-P, 20Hz–20kHz - preserves audio fidelity in headset/speaker switching |
| Supply voltage range | +1.8V to +5.5V - supports direct integration with Li-ion, 3.3V, and 5V system rails |
| Continuous current rating | ±300mA per NO/NC/COM terminal - handles speaker-level audio drive without external buffering |
| Turn-on/turn-off time | 150ns / 60ns max (RL = 50Ω, CL = 35pF) - enables fast multiplexing in real-time audio routing |
Pinout & Package
The MAX4758ETX+ is housed in a 36-pin thin QFN package (6mm × 6mm, 0.5mm pitch) with exposed thermal pad (EP) connected to GND. Pin 1 is located at top-left corner (A1); EP must be soldered to PCB ground plane for thermal and EMI performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (A1) | NC1 | Normally closed terminal of Switch 1 - connects to COM1 when INA = LOW |
| 2 (B2) | COM2 | Common terminal of Switch 2 - bidirectional signal path shared between NO2 and NC2 |
| 4 (A3) | INA | Digital control input for Switches 1 & 2 - active HIGH enables NO1/NO2, disables NC1/NC2 |
| 5 (C3,D4) | V+ | Positive supply input - bypass with 0.1µF capacitor to GND for noise immunity |
| 23 (C4,D3) | GND | Ground reference - low-impedance return path for analog and digital currents |
| 33 (C1) | NO1 | Normally open terminal of Switch 1 - connects to COM1 when INA = HIGH |
| 36 (B1) | COM1 | Common terminal of Switch 1 - primary signal I/O node for Switch 1 audio path |
| EP | Exposed Pad | Thermal and electrical ground - must be soldered to PCB GND plane for thermal dissipation |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail analog signal handling | Supports 0V to V+ input/output swing - eliminates level-shifting circuitry in battery-powered systems |
| Mixed-voltage logic compatibility | IN_ inputs accept up to +5.5V regardless of V+ - enables direct interfacing with 5V microcontrollers on 3.3V or 1.8V supplies |
| Break-before-make timing | 2ns typical - prevents momentary short-circuit between NC and NO paths during state transition |
| Ultra-low THD | 0.03% at 20Hz–20kHz - meets high-fidelity audio requirements for mobile headset and speaker switching |
| Low on-resistance flatness | 0.2Ω max variation over full signal range - ensures linear gain response and minimal harmonic generation |
Applications
| Speaker-Headset Switching | Audio-Signal Routing |
|---|---|
Use Scenario: Dynamically routes mono/stereo audio between built-in speaker and 3.5mm headset jack in smartphones and tablets. IC Role / Device Role / Timing Role: Quad DPDT analog switch providing bidirectional, low-loss signal path selection under GPIO control. Use Value: Eliminates mechanical relays; 0.5Ω RON and 0.03% THD preserve loudspeaker efficiency and audio clarity without added amplification. |
Use Scenario: Routes microphone, earpiece, and auxiliary audio signals among multiple codecs and transceivers in PDAs and handheld devices. IC Role / Device Role / Timing Role: Eight-channel analog multiplexer enabling flexible signal topology reconfiguration via four logic lines. Use Value: Single-chip solution replaces discrete FET arrays; 0.1Ω channel matching ensures balanced stereo output and reduced crosstalk. |
| Cellular Phones | Notebook Computers |
Use Scenario: Switches between internal speaker, Bluetooth audio module, and wired headset in multi-mode cellular handsets. IC Role / Device Role / Timing Role: Audio path manager with rail-to-rail operation supporting 1.8V–5.5V battery voltage range. Use Value: Enables seamless mode transitions with <2ns break-before-make; ±300mA rating drives 8Ω speakers directly. |
Use Scenario: Selects between integrated HD Audio codec outputs and external USB-C audio adapters in ultrabooks. IC Role / Device Role / Timing Role: High-bandwidth analog switch (102MHz –3dB BW) preserving digital audio signal integrity during routing. Use Value: Maintains SNR >95dB; low 284pF COM on-capacitance minimizes loading on high-impedance DAC outputs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4759ETX+ | Contains four 0.5Ω audio switches + four 25pF/0.2Ω data switches; skew = 0.2ns; lower COM on-capacitance (54pF vs. 284pF) on data channels | Used where mixed audio + USB/SDIO signal routing is required; not suitable if only audio switching is needed | Select MAX4759ETX+ only when dual-domain (audio + data) routing is required; MAX4758ETX+ offers superior audio THD and higher current capability for speaker drive |
| TMUX1574RTWR | Quad SPDT (not DPDT); 0.5Ω RON; 1.8V–5.5V supply; 100MHz bandwidth; no guaranteed THD spec; 100mA current rating | Targeted at general-purpose signal routing, not high-fidelity audio; lacks DPDT topology for true headset/speaker swap | Choose TMUX1574RTWR for cost-sensitive, non-audio applications requiring SPDT topology; MAX4758ETX+ remains preferred for DPDT audio switching with THD and current compliance |
Compared with MAX4759ETX+, MAX4758ETX+ provides higher current drive (±300mA vs. ±100mA on data channels) and better audio linearity (0.03% THD), while TMUX1574RTWR lacks DPDT structure and audio-grade distortion specs - making MAX4758ETX+ the only option meeting full speaker-headset switching requirements.
Availability
MAX4758ETX+ is available at Aetrix Electronics and suitable for cellular phone design, notebook audio subsystems, and PDA signal routing requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for MAX4758ETX+ 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 demanding industrial, communications, and consumer applications.
The MAX4758ETX+ belongs to Maxim's high-performance analog switch product line, engineered specifically for low-distortion, rail-to-rail audio signal routing in battery-powered portable devices.
FAQ
What is the maximum continuous current rating per switch terminal in the MAX4758ETX+?
The MAX4758ETX+ supports ±300mA continuous current on all NO_, NC_, and COM_ terminals across its eight switches. This rating applies under TA ≤ +70°C with proper PCB thermal management and is validated per Absolute Maximum Ratings table. Exceeding this limit risks thermal overstress and parametric shift. The MAX4758ETX+'s 0.5Ω on-resistance ensures minimal self-heating at rated current.
Does the MAX4758ETX+ support rail-to-rail analog signal operation?
Yes, the MAX4758ETX+ fully supports rail-to-rail analog signal handling from 0V to V+ on all COM_, NO_, and NC_ terminals. This is explicitly specified in the Electrical Characteristics table under "Analog Signal Range" and confirmed in the Detailed Description. The device maintains low on-resistance flatness (≤0.2Ω) across the full range, enabling direct interface with DACs, ADCs, and audio amplifiers without level-shifting circuitry.
Is the MAX4758ETX+ pin-compatible with the MAX4759ETX+?
No, the MAX4758ETX+ and MAX4759ETX+ are not pin-compatible. Although both use the same 36-pin thin QFN package, their internal switch configurations differ: MAX4758ETX+ dedicates all eight switches to audio (0.5Ω), while MAX4759ETX+ allocates four to audio and four to low-capacitance data routing (25pF), resulting in different pin functions (e.g., NO5–NO8 serve data paths in MAX4759ETX+ but audio paths in MAX4758ETX+). PCB layout must be redesigned for substitution.
What is the total harmonic distortion (THD) performance of the MAX4758ETX+?
The MAX4758ETX+ delivers 0.03% typical total harmonic distortion at 1VP-P, 20Hz–20kHz with RL = 32Ω, as measured per standard audio test conditions in the Electrical Characteristics table. This value is guaranteed over temperature (–40°C to +85°C) and supply voltage (1.8V–5.5V), making it suitable for high-fidelity headset and speaker switching where audible artifacts must be minimized.
How is the exposed thermal pad (EP) of the MAX4758ETX+ intended to be connected?
The exposed pad (EP) of the MAX4758ETX+ must be soldered to a solid PCB ground plane. It serves as both a thermal dissipation path and an electrical ground connection - not optional. Maxim specifies this in Package Information and recommends connecting EP directly to GND for optimal thermal resistance (θJA reduced by ~25%) and EMI suppression. Leaving EP floating or unconnected degrades power handling and may cause instability.
MAX4758ETX+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Active
- Switch Circuit:
- DPDT
- Multiplexer/Demultiplexer Circuit:
- 2:2
- Number of Circuits:
- 4
- On-State Resistance (Max):
- 850mOhm
- Channel-to-Channel Matching (ΔRon):
- 100mOhm
- Voltage - Supply, Single (V+):
- 1.8V ~ 5.5V
- Voltage - Supply, Dual (V±):
- -
- Switch Time (Ton, Toff) (Max):
- 140ns, 50ns
- -3db Bandwidth:
- 50MHz
- Charge Injection:
- 40pC
- Channel Capacitance (CS(off), CD(off)):
- 180pF, 300pF
- Current - Leakage (IS(off)) (Max):
- 4nA
- Crosstalk:
- -90dB @ 100kHz
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 36-TQFN (6x6)
MAX4758ETX+ FAQ
1.How can I place an order for MAX4758ETX+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4758ETX+ 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 MAX4758ETX+ reliable?
The price and inventory of MAX4758ETX+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4758ETX+ is usually 5 days.
3.What payment methods are accepted for MAX4758ETX+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4758ETX+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4758ETX+?
MAX4758ETX+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4758ETX+ 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 MAX4758ETX+?
For technical support, including MAX4758ETX+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4758ETX+ requirements.
6.How does Aetrix verify that MAX4758ETX+ is sourced from the original manufacturer or authorized distributors?
All MAX4758ETX+ 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 MAX4758ETX+ meets industry standards.
7.What is the process for return or replacement of MAX4758ETX+?
All MAX4758ETX+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX4758ETX+, 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 MAX4758ETX+ part is unused and in its original packaging.
Return procedure for MAX4758ETX+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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