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Analog Devices Inc./Maxim Integrated MAX4738EUD
- Part No.:
- MAX4738EUD
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
MAX4738EUD.pdf
- Description:
- IC SWITCH SPST-NCX4 3OHM 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:145,708
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Product details
Overview
MAX4738EUD from Maxim Integrated is a quad SPST analog switch optimized for USB 1.1 and low-voltage audio signal routing, featuring 4.5Ω max on-resistance at +3V, <40ns turn-off time, 2ns max differential skew, and rail-to-rail signal handling from +1.8V to +5.5V supply. It operates in battery-powered portable audio interfaces and USB peripheral switching circuits.
For engineers reviewing the MAX4738EUD datasheet, MAX4738EUD pinout, MAX4738EUD application, or MAX4738EUD equivalent, this page delivers verified electrical specs, UCSP-16 package details, real-world timing behavior, leakage performance at temperature extremes, and validated alternatives for USB/audio analog path design.
Technical Context
The MAX4738EUD implements four normally closed (NC) SPST analog switches using CMOS process technology, with guaranteed break-before-make operation excluded (unlike MAX4739). Its digital inputs are +1.8V logic compatible across +2.7V to +3.6V supply range, supporting mixed-voltage system interfacing without level shifters.
It delivers <0.5nA leakage current at +25°C, -55dB off-isolation at 10MHz, and -80dB crosstalk at same frequency-enabling high-fidelity audio channel separation and low-distortion USB data path integrity. The device maintains 300MHz -3dB bandwidth and 0.03% THD under 600Ω load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-Resistance (max) | 4.5Ω at +3V - ensures minimal voltage drop and power loss in low-voltage audio/USB signal paths |
| Turn-Off Time (max) | 40ns at +2.7V - enables fast channel switching for multi-source audio routing |
| Off-Isolation | -55dB at 10MHz - suppresses interference between inactive and active analog channels |
| Crosstalk | -80dB at 10MHz - preserves signal integrity across adjacent switched paths |
| Supply Range | +1.8V to +5.5V - supports direct integration into Li-ion powered and 3.3V/5V system rails |
| Leakage Current (max) | ±1nA over -40°C to +85°C - prevents DC offset drift in precision sample-and-hold or sensor front-ends |
| -3dB Bandwidth | >300MHz - maintains full-speed USB 1.1 (12Mbps) signal fidelity without attenuation |
Pinout & Package
MAX4738EUD is packaged in a 16-bump UCSP (Ultra Compact Silicon Package), measuring 2mm × 2mm with 0.5mm bump pitch. This chip-scale footprint reduces PCB area by >60% versus TSSOP alternatives while enabling high-density portable designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN1–IN4 | Digital control input | Active-low logic enables NC path closure; compatible with +1.8V logic thresholds (VIH = +1.4V, VIL = +0.5V) |
| COM1–COM4 | Analog common terminal | Bidirectional node connecting to source/sink; handles rail-to-rail signals (GND to V+) |
| NC1–NC4 | Analog normally closed terminal | Conducts when INx = LOW; open-circuit when INx = HIGH - default-closed topology for fail-safe routing |
| V+ | Positive supply | Single supply input (1.8V–5.5V); bypassing with 0.1µF to GND required for noise immunity |
| GND | Ground reference | Digital ground connection; must be low-impedance to minimize switching transients |
Key Features
| Feature | Design Value |
|---|---|
| Normally closed (NC) configuration | Ensures default signal continuity during power-up or control loss - critical for audio mute/fail-safe USB host detection |
| 15pF on-channel capacitance | Minimizes loading on high-impedance sources (e.g., MEMS microphones, DAC outputs) without bandwidth degradation |
| 0.4Ω RON matching (max) | Guarantees consistent gain/attenuation across all four channels in stereo or multi-track audio routing |
| Rail-to-rail analog signal range | Supports full-swing audio signals (0V to V+) without clipping or distortion in single-supply systems |
| 2ns max differential skew | Maintains phase coherence between parallel data lines (e.g., USB D+/D−) to prevent timing violations |
Applications
| USB Peripheral Switching | Portable Audio Multiplexer |
|---|---|
Use Scenario: Dynamic reconfiguration of USB D+/D− lines between multiple peripherals (e.g., keyboard, mouse, flash drive) sharing one host port. IC Role / Device Role / Timing Role: Quad NC switch isolating unused devices while maintaining signal integrity on active path. Use Value: Enables hot-plug arbitration without signal reflections or ESD coupling due to <300MHz bandwidth and -55dB off-isolation. |
Use Scenario: Selecting between microphone, line-in, and headset output paths in Bluetooth earbuds or voice assistant modules. IC Role / Device Role / Timing Role: Low-leakage analog multiplexer routing bidirectional audio signals with minimal THD (<0.03%) and crosstalk (-80dB). Use Value: Preserves SNR in battery-powered devices via 4.5Ω RON and <0.5nA leakage, avoiding DC bias errors in amplifier inputs. |
| Low-Voltage Data Acquisition | Sample-and-Hold Front-End |
Use Scenario: Channel selection in 12-bit ADC systems powered from 3.3V or single-cell Li-ion (2.7–4.2V). IC Role / Device Role / Timing Role: Precision analog switch providing low flatness error (1.2Ω) and matched RON to minimize gain mismatch across channels. Use Value: Reduces integral nonlinearity (INL) contribution in multi-channel systems through guaranteed 0.4Ω RON matching. |
Use Scenario: Acquiring analog sensor outputs (e.g., thermistor, pressure transducer) with minimal charge injection disturbance. IC Role / Device Role / Timing Role: Fast turn-on/turn-off switch (<80ns/<40ns) controlling hold capacitor charging with 5pC typical charge injection. Use Value: Limits acquisition error to <1 LSB in 12-bit systems by minimizing voltage step on hold capacitor during switching. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4737EUD | Four normally open (NO) configuration vs. MAX4738EUD's NC topology; identical RON, timing, and bandwidth specs | Suitable where default-open state is required (e.g., power-gated sensor inputs) | Select MAX4737EUD when fail-open behavior is needed; MAX4738EUD preferred for fail-closed safety |
| TS5A23157DCUR | Lower RON (0.9Ω typ at 3V) but higher leakage (±10nA), no guaranteed 1.8V logic compatibility, and 14-pin VSSOP package | Better for low-RON priority in non-battery apps; unsuitable for ultra-low-leakage or space-constrained designs | Choose TS5A23157DCUR only if RON reduction outweighs leakage and footprint trade-offs |
Compared with MAX4737EUD and TS5A23157DCUR, MAX4738EUD uniquely combines NC default state, sub-1nA leakage, and 2mm×2mm UCSP packaging-making it optimal for fail-safe, space-constrained, and low-power audio/USB routing where continuity at power-up is mandatory.
Availability
MAX4738EUD is available at Aetrix Electronics and suitable for USB peripheral switching, portable audio multiplexing, and low-voltage data-acquisition systems requiring stable component supply across industrial temperature ranges (-40°C to +85°C).
Supply support for MAX4738EUD 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 and mixed-signal ICs for demanding industrial, automotive, and communications applications.
The MAX4737/MAX4738/MAX4739 family targets high-fidelity analog signal routing in USB 1.1 and portable audio systems, emphasizing low RON, ultra-low leakage, and compact chip-scale packaging for space-constrained designs.
FAQ
What is the default switch state of MAX4738EUD?
The MAX4738EUD features four normally closed (NC) analog switches. When all digital inputs (IN1–IN4) are held LOW, the COMx–NCx paths conduct. When any INx is driven HIGH, its corresponding NC path opens. This fail-closed behavior ensures signal continuity during power-up or control signal loss, making MAX4738EUD ideal for safety-critical audio routing and USB host detection circuits.
Does MAX4738EUD support 1.8V logic-level control inputs?
Yes, MAX4738EUD accepts +1.8V-compatible logic inputs with VIH = +1.4V (min) and VIL = +0.5V (max) when operating from +2.7V to +3.6V supply. This allows direct interfacing with 1.8V microcontrollers or FPGAs without external level shifters-reducing BOM count and layout complexity in battery-powered portable designs using MAX4738EUD.
Can MAX4738EUD handle rail-to-rail analog signals?
Yes, MAX4738EUD supports rail-to-rail analog signal operation from GND to V+, regardless of supply voltage (1.8V–5.5V). Its CMOS architecture ensures minimal on-resistance variation across the full signal range, enabling accurate transmission of full-swing audio waveforms and USB differential signals without clipping or distortion-key for maintaining fidelity in MAX4738EUD-based routing applications.
What is the thermal performance limit of MAX4738EUD in UCSP package?
MAX4738EUD in 16-bump UCSP has a maximum junction temperature of +150°C and continuous power dissipation of 659mW at +70°C ambient, derating at 8.3mW/°C above that. Its thermal resistance θJA is approximately 105°C/W. For reliable operation in sealed enclosures, keep ambient temperature below +70°C or implement localized airflow-critical for sustained USB/full-audio bandwidth use of MAX4738EUD.
How does MAX4738EUD compare to MAX4739EUD in switching behavior?
Unlike MAX4739EUD-which integrates two NO and two NC switches with break-before-make timing-MAX4738EUD provides four dedicated NC switches with no break-before-make guarantee. MAX4738EUD's simpler topology yields identical RON, bandwidth, and leakage specs but eliminates tBBM delay overhead. Choose MAX4738EUD for pure NC routing; select MAX4739EUD only when mixed NO/NC and guaranteed channel isolation during transition are required.
MAX4738EUD Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Switch Circuit:
- SPST - NC
- Multiplexer/Demultiplexer Circuit:
- 1:1
- Number of Circuits:
- 4
- On-State Resistance (Max):
- 3Ohm
- 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:
- -80dB @ 10MHz
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP
MAX4738EUD FAQ
1.How can I place an order for MAX4738EUD through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4738EUD 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 reliable?
The price and inventory of MAX4738EUD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4738EUD is usually 5 days.
3.What payment methods are accepted for MAX4738EUD?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4738EUD transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4738EUD?
MAX4738EUD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4738EUD 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?
For technical support, including MAX4738EUD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4738EUD requirements.
6.How does Aetrix verify that MAX4738EUD is sourced from the original manufacturer or authorized distributors?
All MAX4738EUD 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 meets industry standards.
7.What is the process for return or replacement of MAX4738EUD?
All MAX4738EUD units undergo pre-shipment inspection (PSI). If there is an issue with MAX4738EUD, 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 part is unused and in its original packaging.
Return procedure for MAX4738EUD:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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