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Analog Devices Inc./Maxim Integrated MAX4738EBE
- Part No.:
- MAX4738EBE
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-WFBGA, CSPBGA
- Datasheet:
-
MAX4738EBE.pdf
- Description:
- MAX4738 QUAD SPST ANALOG SWITCH
- Quantity:
- Payment:
- Shipping:
Inventory:320
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Product details
Overview
MAX4738EBE from Maxim Integrated is a quad single-pole/single-throw (SPST) analog switch optimized for USB 1.1 and audio signal routing, operating from +1.8V to +5.5V with 4.5Ω max on-resistance at +3V, <40ns turn-off time at +2.7V, and 15pF on-channel capacitance. It features four normally closed (NC) switches in a 16-bump UCSP package (2mm × 2mm), enabling compact, low-distortion signal path control in portable audio and data interfaces.
For engineers reviewing the MAX4738EBE datasheet, MAX4738EBE pinout, MAX4738EBE application, or MAX4738EBE equivalent, this page delivers verified electrical specs, UCSP bump mapping, USB 1.1–compliant timing performance, leakage behavior across temperature, and real-world switching trade-offs between RON flatness, crosstalk (-80dB @ 10MHz), and rail-to-rail analog handling.
Technical Context
The MAX4738EBE implements four independent NC-configured CMOS SPST switches with break-before-make logic disabled (unlike MAX4739), supporting bidirectional analog signal flow from GND to V+. Its digital inputs are +1.8V logic compatible even when V+ = +3.6V, allowing mixed-voltage system interfacing without level shifters.
Designed for high-fidelity signal integrity, it achieves >300MHz -3dB bandwidth, 0.03% THD at 1kHz, and differential skew ≤2ns-critical for maintaining USB full-speed (12Mbps) eye diagram margins and stereo audio channel matching in battery-powered equipment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-resistance (max) | 4.5Ω at +3V supply - ensures minimal insertion loss and voltage drop in audio/USB signal paths |
| RON match (max) | 0.4Ω between channels at +3V - enables precise channel balancing in stereo or differential applications |
| Turn-off time (max) | 40ns at +2.7V - supports fast switching in multiplexed data acquisition and sample-and-hold circuits |
| Off-isolation | -55dB at 10MHz - suppresses coupling between inactive and active signal paths in dense PCB layouts |
| Crosstalk | -80dB at 10MHz - preserves signal purity across adjacent switched channels in A/V routing |
| Supply range | +1.8V to +5.5V - allows direct integration with Li-ion, 3.3V, and 5V system rails without regulators |
| Leakage current | <0.5nA at +25°C - minimizes error in high-impedance sensor or precision measurement front-ends |
Pinout & Package
MAX4738EBE uses a 16-bump UCSP (chip-scale package) measuring 2mm × 2mm with 0.5mm bump pitch. The package has no leads; connections are made via solder bumps on the bottom side (bumps-down orientation).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN1–IN4 | Digital control input | CMOS-compatible logic inputs driving NC state; low = ON (closed), high = OFF (open) |
| COM1–COM4 | Analog common terminal | Bidirectional node connected to load or source; handles rail-to-rail signals (GND to V+) |
| NC1–NC4 | Analog normally closed terminal | Connected to COMx when INx = low; open when INx = high - defines default-closed signal path |
| V+ | Positive analog supply | Single power rail for analog and digital sections; bypassing with 0.1µF to GND reduces switching noise |
| GND | Digital/analog ground | Common reference for all signals and supplies; must be low-impedance for THD and crosstalk control |
Key Features
| Feature | Design Value |
|---|---|
| USB 1.1 signal switching | Guaranteed <2ns propagation delay and <0.5ns skew change at 12Mbps - maintains full-speed compliance |
| Rail-to-rail analog handling | Supports signals from GND to V+ across full supply range - eliminates clipping in audio and sensor interfaces |
| Low on-capacitance | 15pF typical - preserves high-frequency bandwidth and minimizes loading on source drivers |
| Break-before-make disabled | No intentional dead-time between switch transitions - avoids signal interruption in NC-only configuration |
| +1.8V logic compatibility | Accepts 0.5V/1.4V thresholds at +2.7V–+3.6V V+ - enables direct interface with ultra-low-voltage MCUs |
Applications
| Portable Audio Switching | USB 1.1 Data Routing |
|---|---|
Use Scenario: Selecting between multiple audio sources (e.g., headset mic, Bluetooth codec, line-in) in a smartphone or wireless earbud dock. IC Role / Device Role / Timing Role: Quad NC switch isolating unused paths while passing selected analog audio with <0.03% THD and 300MHz bandwidth. Use Value: Enables zero-crossing mute during switching and preserves SNR >95dB in 16-bit audio chains without external buffering. |
Use Scenario: Multiplexing D+ and D- lines between host controller and multiple peripheral ports in a USB hub or docking station. IC Role / Device Role / Timing Role: Bidirectional NC switch maintaining DC continuity and impedance-matched 90Ω differential path up to 12Mbps. Use Value: Eliminates need for discrete FETs or relays while meeting USB 1.1 eye diagram mask requirements at full speed. |
| Low-Voltage Data Acquisition | Sample-and-Hold Signal Gating |
Use Scenario: Channel selection in a 12-bit SAR ADC front-end powered by a 3.3V LDO in industrial sensor nodes. IC Role / Device Role / Timing Role: Low-leakage (<0.5nA) NC switch routing sensor outputs to ADC input with minimal offset error. Use Value: Reduces input bias current-induced gain error to <0.01% FS, enabling sub-LSB accuracy without calibration. |
Use Scenario: Isolating hold capacitor from input during acquisition phase in precision instrumentation amplifiers. IC Role / Device Role / Timing Role: Fast tOFF <40ns NC switch disconnecting sampling node to prevent charge injection into hold cap. Use Value: Limits charge injection to 5pC - keeps aperture error below 0.5 LSB for 16-bit systems at 100ksps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4737EBE-T | Four NO switches (vs. NC); identical RON, timing, and package | Requires inverted control logic; suited for default-open fail-safe paths | Select when circuit requires open-at-power-up behavior or signal path isolation by default |
| MAX4739EBE-T | Mixed NO/NC configuration (2×NO + 2×NC); includes break-before-make (1ns tBBM) | Enables safe switching between conflicting sources; adds 1ns dead-time overhead | Choose when hot-swapping or crosspoint routing demands guaranteed isolation during transition |
Compared with MAX4738EBE, MAX4737EBE-T provides complementary logic polarity for fail-open designs, while MAX4739EBE-T adds controlled break-before-make for conflict-free reconfiguration-neither offers pin-to-pin replacement due to differing switch topology and truth table behavior.
Availability
MAX4738EBE is available at Aetrix Electronics and suitable for portable audio switching, USB 1.1 data routing, and low-voltage data-acquisition systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for MAX4738EBE 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 industrial, communications, and consumer applications, with expertise in low-power, high-speed switching and signal integrity.
The MAX4737/MAX4738/MAX4739 family targets USB 1.1–compliant analog signal routing and battery-operated audio systems, emphasizing low RON, rail-to-rail operation, and ultra-small UCSP packaging for space-constrained designs.
FAQ
What is the switch configuration of MAX4738EBE?
The MAX4738EBE contains four independent normally closed (NC) SPST analog switches. When the digital control input (INx) is logic low, the corresponding NCx terminal connects to its COMx terminal; when INx is high, the path opens. This differs from MAX4737EBE-T (four NO) and MAX4739EBE-T (two NO + two NC). The MAX4738EBE does not implement break-before-make timing.
Does MAX4738EBE support rail-to-rail analog signals?
Yes, MAX4738EBE supports analog signals from GND to V+ across its full specified supply range (+1.8V to +5.5V). This rail-to-rail capability allows undistorted passage of audio waveforms, sensor outputs, and USB differential signals without clipping, provided V+ is properly bypassed with a 0.1µF capacitor to GND.
What is the maximum on-resistance of MAX4738EBE at 3.3V supply?
At V+ = +3.3V (within the +2.7V to +3.6V test range), MAX4738EBE guarantees a maximum on-resistance of 4.5Ω per channel. Typical RON is ~3.0Ω, with flatness ≤1.2Ω and matching ≤0.4Ω between channels - critical for balanced stereo or matched differential pair routing.
Can MAX4738EBE be used in USB 2.0 applications?
No, MAX4738EBE is specified and characterized only for USB 1.1 (12Mbps) compliance. Its >300MHz -3dB bandwidth and <2ns skew meet full-speed requirements but do not guarantee High-Speed (480Mbps) signal integrity. For USB 2.0, use purpose-built switches like MAX14502 or similar with 480Mbps validation.
What is the leakage current specification for MAX4738EBE at 85°C?
At TA = +85°C and V+ = +3.6V, MAX4738EBE specifies COM_ off-leakage and NO_/NC_ off-leakage currents of ±1nA maximum. Actual measured values remain below 0.5nA over temperature - essential for preserving accuracy in high-impedance data-acquisition front-ends where leakage directly contributes to offset error.
MAX4738EBE 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:
- 16-UCSP (2.02x2.02)
MAX4738EBE FAQ
1.How can I place an order for MAX4738EBE through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4738EBE 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 MAX4738EBE reliable?
The price and inventory of MAX4738EBE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4738EBE is usually 5 days.
3.What payment methods are accepted for MAX4738EBE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4738EBE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4738EBE?
MAX4738EBE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4738EBE 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 MAX4738EBE?
For technical support, including MAX4738EBE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4738EBE requirements.
6.How does Aetrix verify that MAX4738EBE is sourced from the original manufacturer or authorized distributors?
All MAX4738EBE 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 MAX4738EBE meets industry standards.
7.What is the process for return or replacement of MAX4738EBE?
All MAX4738EBE units undergo pre-shipment inspection (PSI). If there is an issue with MAX4738EBE, 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 MAX4738EBE part is unused and in its original packaging.
Return procedure for MAX4738EBE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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