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Analog Devices Inc./Maxim Integrated MAX4738EUD+T
- Part No.:
- MAX4738EUD+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
MAX4738EUD+T.pdf
- Description:
- IC SW SPST-NCX4 4.5OHM 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,938
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Product details
Overview
MAX4738EUD+T from Maxim Integrated is a quad SPST analog switch optimized for USB 1.1 and audio signal routing, featuring 4.5Ω max on-resistance at +3V, <0.5nA leakage current at +25°C, and break-before-make switching with 1ns timing. It operates from a single +1.8V to +5.5V supply and supports rail-to-rail analog signal handling in battery-powered portable audio interfaces.
For engineers reviewing the MAX4738EUD+T datasheet, MAX4738EUD+T pinout, MAX4738EUD+T application, or MAX4738EUD+T equivalent, this device delivers low skew (<2ns), high off-isolation (−55dB @ 10MHz), and 300MHz −3dB bandwidth-critical for full-speed USB signal integrity and low-distortion audio path selection.
Technical Context
The MAX4738EUD+T implements four normally closed (NC) SPST analog switches using CMOS process technology, enabling bidirectional signal flow with guaranteed operation across −40°C to +85°C. Its digital control inputs are +1.8V logic compatible when V+ is +2.7V to +3.6V, and support rail-to-rail drive independent of supply voltage.
It features 15pF on-channel capacitance, 9pF off-capacitance per NC terminal, and 0.4Ω max RON matching between channels at +3V-ensuring minimal crosstalk (−80dB @ 10MHz) and distortion (0.03%) in multi-channel audio routing and data-acquisition front-ends.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +1.8V to +5.5V single supply-enables direct integration into 1.8V/3.3V/5V systems without level-shifting. |
| Max On-Resistance (RON) | 4.5Ω at +3V-minimizes insertion loss and voltage drop in low-voltage analog paths. |
| RON Matching | 0.4Ω max between channels at +3V-ensures consistent gain and phase response across switched audio/data channels. |
| Off-Isolation | −55dB at 10MHz-suppresses interference between inactive and active signal paths in dense PCB layouts. |
| Turn-On/Off Time | tON < 80ns, tOFF < 40ns at +2.7V-supports fast channel switching in sample-and-hold and multiplexed ADC applications. |
| Leakage Current | <0.5nA at +25°C-preserves accuracy in high-impedance sensor interfaces and precision sample-and-hold circuits. |
| Bandwidth (−3dB) | >300MHz-maintains signal fidelity for USB 1.1 (12Mbps) and wideband audio signals up to 15MHz. |
Pinout & Package
MAX4738EUD+T is packaged in a 16-bump UCSP (2mm × 2mm, 0.5mm bump pitch), offering ultra-compact footprint for space-constrained portable designs. The package is RoHS-compliant and optimized for reflow soldering with infrared or vapor-phase profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN1–IN4 | Digital control input | Active-low logic controls NC switch state; compatible with +1.8V logic when V+ = +2.7V to +3.6V. |
| COM1–COM4 | Analog common terminal | Bidirectional node connecting to system ground reference or signal source in NC configuration. |
| NC1–NC4 | Analog normally closed terminal | Default-connected path to COM when IN_ = LOW; opens when IN_ = HIGH-ideal for default-signal-path fail-safe routing. |
| V+ | Positive supply | Single power rail supporting full analog signal swing from GND to V+; bypass with 0.1µF capacitor. |
| GND | Ground reference | Digital ground connection; must be tied to system ground plane to minimize noise coupling into analog paths. |
Key Features
| Feature | Design Value |
|---|---|
| USB 1.1 signal switching compliance | Guaranteed <2ns differential skew and <80ns tON at 12Mbps-meets full-speed USB timing budgets without external buffering. |
| Rail-to-rail analog signal handling | Supports VCOM, VNC from GND to V+-enables seamless integration in single-supply audio codecs and sensor front-ends. |
| Low on-channel capacitance | 15pF typical-reduces loading on high-frequency sources and preserves rise/fall times in fast-switching data paths. |
| Break-before-make timing | Not implemented-MAX4738 is NC-only; no tBBM specification applies, eliminating unintended short-circuits during state transitions. |
| CMOS logic compatibility | +1.8V input thresholds (VIL = 0.5V, VIH = 1.4V at +3V supply)-allows direct interfacing with low-voltage microcontrollers and FPGAs. |
Applications
| USB Peripheral Switching | Portable Audio Routing |
|---|---|
Use Scenario: Selecting between multiple USB upstream ports in a dock or hub controller. IC Role / Device Role / Timing Role: Quad NC switch isolates unused USB D+/D− lines while maintaining default connection to primary host port. Use Value: Eliminates need for external pull-up resistors or manual reset sequencing-ensures plug-and-play USB enumeration stability. |
Use Scenario: Routing microphone and line-in signals between codec, amplifier, and headset jack in smartphones or tablets. IC Role / Device Role / Timing Role: NC configuration provides default analog path continuity during boot or sleep states. Use Value: Prevents pop/click artifacts by avoiding open-circuit transients-leverages <0.5nA leakage to maintain DC bias integrity. |
| Low-Voltage Data Acquisition | Sample-and-Hold Front-End |
Use Scenario: Multiplexing sensor outputs (e.g., thermistors, RTDs) into a 16-bit SAR ADC in handheld test equipment. IC Role / Device Role / Timing Role: Low RON flatness (1.2Ω) ensures consistent channel gain across full input range (0–3.3V). Use Value: Reduces calibration overhead-enables <0.01% gain error contribution even at 100kSPS sampling rates. |
Use Scenario: Isolating hold capacitor from input source during acquisition phase in precision instrumentation amplifiers. IC Role / Device Role / Timing Role: Fast tOFF <40ns at +2.7V enables precise aperture timing control with sub-100ps jitter. Use Value: Limits charge injection (5pC) to <1LSB error in 18-bit systems-avoids dedicated zero-crossing detection circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4737EUD+T | Four NO switches (vs. MAX4738's NC); identical RON, bandwidth, and leakage specs. | Suitable where default-open signal path is required (e.g., power-gated sensor inputs). | Select MAX4737EUD+T only when circuit requires de-energized default state-pinout differs in NO/NC assignment. |
| TMUX1574RSVR | 4.8Ω RON (max), 350MHz bandwidth, −45dB off-isolation @ 10MHz; 1.8V–5.5V supply. | Higher crosstalk (−70dB) and lower isolation limit use in high-density USB/audio co-location. | Prefer TMUX1574RSVR only if UCSP footprint compatibility is secondary to TI ecosystem alignment or volume pricing. |
Compared with MAX4737EUD+T and TMUX1574RSVR, the MAX4738EUD+T uniquely guarantees NC-default behavior with superior off-isolation (−55dB) and tighter RON matching (0.4Ω), making it optimal for fail-safe signal routing where uninterrupted default connectivity is mandatory.
Availability
MAX4738EUD+T is available at Aetrix Electronics and suitable for USB peripheral switching, portable audio routing, low-voltage data-acquisition systems requiring stable component supply, long-term production continuity, and RoHS-compliant packaging.
Supply support for MAX4738EUD+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) designs precision analog, mixed-signal, and power-management ICs for industrial, medical, and communications applications.
The MAX4737/MAX4738/MAX4739 family targets low-voltage, high-fidelity analog signal routing-specifically engineered for USB 1.1 compliance and audio-grade performance in space-constrained portable electronics.
FAQ
What is the maximum operating temperature range for the MAX4738EUD+T?
The MAX4738EUD+T is specified for continuous operation from −40°C to +85°C ambient temperature. Junction temperature must not exceed +150°C under worst-case power dissipation conditions. Thermal derating begins above +70°C ambient, with 8.3mW/°C reduction in continuous power dissipation for the UCSP package.
Does the MAX4738EUD+T support rail-to-rail analog signal switching?
Yes, the MAX4738EUD+T supports rail-to-rail analog signal handling: analog voltages on COM and NC terminals can swing from GND to V+ without degradation in on-resistance or distortion. This capability is confirmed across the full +1.8V to +5.5V supply range and enables direct interface with single-supply op-amps and ADCs.
What is the logic polarity of the control inputs on the MAX4738EUD+T?
The MAX4738EUD+T uses active-low logic: applying a logic LOW (≤0.5V at +3V supply) closes the NC switch (connects COM to NC), while a logic HIGH (≥1.4V at +3V supply) opens it. Input thresholds scale with supply voltage-VIH = 2.0V and VIL = 0.8V when V+ = +5V.
Can the MAX4738EUD+T be used in USB 2.0 applications?
No, the MAX4738EUD+T is designed and characterized for USB 1.1 (12Mbps) compliance only. Its >300MHz −3dB bandwidth and <2ns skew meet USB 1.1 signal integrity requirements, but it lacks the 480Mbps channel performance, ESD robustness, and eye-diagram specifications required for USB 2.0 High-Speed mode.
What is the recommended power-supply bypassing for the MAX4738EUD+T?
A 0.1µF ceramic capacitor placed as close as possible between V+ and GND pins is sufficient for most applications. This minimizes switching noise coupling and improves noise margin. For high-density layouts or noisy environments, adding a 1µF bulk capacitor in parallel further stabilizes the supply rail during rapid channel switching events.
MAX4738EUD+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Switch Circuit:
- SPST - NC
- Multiplexer/Demultiplexer Circuit:
- 1:1
- Number of Circuits:
- 4
- On-State Resistance (Max):
- 4.5Ohm
- Channel-to-Channel Matching (ΔRon):
- 100mOhm
- Voltage - Supply, Single (V+):
- 1.8V ~ 5.5V
- Voltage - Supply, Dual (V±):
- -
- Switch Time (Ton, Toff) (Max):
- 80ns, 40ns
- -3db Bandwidth:
- 300MHz
- Charge Injection:
- 5pC
- Channel Capacitance (CS(off), CD(off)):
- 9pF
- Current - Leakage (IS(off)) (Max):
- 500pA
- Crosstalk:
- -110dB @ 1MHz
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP
MAX4738EUD+T FAQ
1.How can I place an order for MAX4738EUD+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4738EUD+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 MAX4738EUD+T reliable?
The price and inventory of MAX4738EUD+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4738EUD+T is usually 5 days.
3.What payment methods are accepted for MAX4738EUD+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4738EUD+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4738EUD+T?
MAX4738EUD+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4738EUD+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 MAX4738EUD+T?
For technical support, including MAX4738EUD+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4738EUD+T requirements.
6.How does Aetrix verify that MAX4738EUD+T is sourced from the original manufacturer or authorized distributors?
All MAX4738EUD+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 MAX4738EUD+T meets industry standards.
7.What is the process for return or replacement of MAX4738EUD+T?
All MAX4738EUD+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4738EUD+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 MAX4738EUD+T part is unused and in its original packaging.
Return procedure for MAX4738EUD+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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