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Analog Devices Inc./Maxim Integrated MAX4738EUD+TG51
- Part No.:
- MAX4738EUD+TG51
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- -
- Datasheet:
-
MAX4738EUD+TG51.pdf
- Description:
- INTEGRATED CIRCUIT
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Product details
Overview
MAX4738EUD+TG51 from Maxim Integrated is a quad single-pole/single-throw (SPST) analog switch optimized for USB 1.1 signal routing and low-voltage audio switching. It delivers 4.5Ω max on-resistance at +3V, <40ns turn-off time, 2ns max differential skew, and −80dB crosstalk at 10MHz in a 14-pin TSSOP package. It operates from +1.8V to +5.5V and supports rail-to-rail analog signals in battery-powered portable equipment.
For engineers reviewing the MAX4738EUD+TG51 datasheet, MAX4738EUD+TG51 pinout, MAX4738EUD+TG51 application, or MAX4738EUD+TG51 equivalent, key selection criteria include guaranteed 4.5Ω RON (max) at 3V, break-before-make timing (1ns), USB 1.1 compliance, and compatibility with +1.8V logic inputs across its full supply range.
Technical Context
The MAX4738EUD+TG51 implements four normally closed (NC) SPST switches using CMOS process technology, enabling bidirectional signal routing with minimal distortion (0.03% THD) and high off-isolation (−55dB at 10MHz). Its architecture guarantees monotonic on-resistance flatness (≤1.2Ω) and tight channel matching (≤0.4Ω RON match) over the full analog input range (GND to V+).
It features +1.8V logic-compatible digital inputs that accept rail-to-rail control voltages up to V+ + 0.3V, allowing interoperability with mixed-supply systems. The device maintains stable dynamic performance across temperature (−40°C to +85°C) and supply voltage (1.8V–5.5V), with tON <80ns and tOFF <40ns at +2.7V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-Resistance (RON) | 4.5Ω max at +3V supply - ensures minimal signal attenuation and power loss in low-voltage audio/USB paths |
| RON Matching | 0.4Ω max between channels at +3V - enables precise signal balancing in multi-channel audio routing |
| Turn-Off Time (tOFF) | <40ns at +2.7V - supports fast switching in data-acquisition sample-and-hold circuits |
| Differential Skew | 2ns max - preserves signal timing integrity for USB 1.1 full-speed (12Mbps) differential pairs |
| Off-Isolation | −55dB at 10MHz - suppresses interference between inactive and active signal paths |
| Crosstalk | −80dB at 10MHz - prevents coupling between adjacent switched audio or data channels |
| Supply Range | +1.8V to +5.5V single supply - eliminates need for dual supplies in portable battery-operated designs |
Pinout & Package
The MAX4738EUD+TG51 is housed in a 14-pin Thin Shrink Small Outline Package (TSSOP) with 0.65mm lead pitch, JEDEC MO-153 compliant, footprint compatible with industry-standard 14-TSSOP land patterns.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | V+ | Positive supply input - must be bypassed with 0.1µF capacitor to GND for noise immunity |
| 2 | IN1 | Digital control input for COM1–NC1 switch - active-high logic controls NC closure |
| 3 | IN4 | Digital control input for COM4–NC4 switch - enables independent channel enable/disable |
| 4 | NC4 | Normally closed analog terminal for Switch 4 - connects to COM4 when IN4 = HIGH |
| 5 | COM4 | Common analog node for Switch 4 - bidirectional path between NC4 and system signal line |
| 6 | COM3 | Common analog node for Switch 3 - shared connection point for NC3 and external circuitry |
| 7 | NC3 | Normally closed analog terminal for Switch 3 - closes to COM3 when IN3 = HIGH |
| 8 | COM2 | Common analog node for Switch 2 - carries analog signal routed through NC2 |
| 9 | NC2 | Normally closed analog terminal for Switch 2 - provides low-RON path when enabled |
| 10 | COM1 | Common analog node for Switch 1 - primary interface for source/sink of Switch 1 |
| 11 | NC1 | Normally closed analog terminal for Switch 1 - default-closed path for fail-safe routing |
| 12 | GND | Digital ground reference - must be connected to system ground plane for stable logic thresholds |
| 13 | IN3 | Digital control input for COM3–NC3 switch - synchronous with other IN pins for coordinated switching |
| 14 | IN2 | Digital control input for COM2–NC2 switch - supports independent or grouped channel control |
Key Features
| Feature | Design Value |
|---|---|
| USB 1.1 Signal Switching | Guaranteed 4.5Ω RON and <2ns skew meet full-speed (12Mbps) timing and impedance requirements |
| Rail-to-Rail Analog Handling | Supports signals from GND to V+ without clipping - essential for audio line-level and sensor interfaces |
| +1.8V Logic Compatibility | Accepts 0.5V/1.4V logic thresholds at +3V supply - enables direct interfacing with low-voltage microcontrollers |
| Low On-Channel Capacitance | 15pF typical - minimizes loading on high-frequency USB and audio traces, preserving bandwidth |
| Break-Before-Make Timing | 1ns guaranteed - prevents momentary short-circuits during channel reconfiguration in multiplexed systems |
Applications
| USB 1.1 Peripheral Multiplexing | Portable Audio Signal Routing |
|---|---|
Use Scenario: Selecting between multiple USB upstream ports in a dock or hub controller. IC Role / Device Role / Timing Role: Quad NC switch routes D+/D− pairs while maintaining signal integrity and USB timing margins. Use Value: Enables compact, low-power USB port sharing without signal degradation or timing violations at 12Mbps. |
Use Scenario: Switching stereo line-in/out paths in Bluetooth headphones or voice-controlled speakers. IC Role / Device Role / Timing Role: Bidirectional analog switch handling rail-to-rail audio waveforms with <0.03% THD. Use Value: Preserves audio fidelity across multiple sources while consuming <1µA quiescent current in standby. |
| Low-Voltage Data Acquisition | Sample-and-Hold Circuit Switching |
Use Scenario: Multiplexing sensor outputs (e.g., thermistors, accelerometers) into a single ADC input. IC Role / Device Role / Timing Role: Low-leakage (<0.5nA) SPST switch isolating high-impedance sensors from ADC front-end. Use Value: Prevents measurement error from channel crosstalk or off-state leakage in 12-bit+ precision systems. |
Use Scenario: Controlling hold capacitor charging/discharging in precision analog-to-digital conversion stages. IC Role / Device Role / Timing Role: Fast-switching (tOFF <40ns) NC path enabling accurate sampling window control. Use Value: Reduces aperture uncertainty and improves effective resolution in high-speed SAR ADC applications. |
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+TG51's four NC - complementary logic sense and default state | Suitable where default-open signal path is required (e.g., safety interlocks, power-gated I/O) | Select MAX4737EUD+ when fail-open behavior is needed; verify control logic polarity inversion in firmware/hardware |
| TS5A3157DCKR | Lower RON (0.75Ω typ at 3V) but higher leakage (10nA max) and no guaranteed USB 1.1 skew spec | Better for low-RON audio line driving; less suitable for timing-critical USB data routing | Prefer TS5A3157DCKR for cost-sensitive audio-only apps; retain MAX4738EUD+TG51 for USB-compliant designs |
Compared with MAX4737EUD+ and TS5A3157DCKR, the MAX4738EUD+TG51 uniquely combines guaranteed NC topology, USB 1.1 skew compliance, and sub-1nA leakage - making it optimal for fail-safe, timing-critical analog multiplexing where default-closed operation is mandatory.
Availability
MAX4738EUD+TG51 is available at Aetrix Electronics and suitable for USB peripheral docking stations, portable audio accessories, low-voltage data-acquisition modules, and sample-and-hold subsystems requiring stable component supply and long-term industrial availability.
Supply support for MAX4738EUD+TG51 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 semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and consumer applications.
The MAX4737/MAX4738/MAX4739 family was designed specifically for low-voltage, high-fidelity analog signal routing in space-constrained portable electronics - emphasizing USB 1.1 compliance, ultra-low leakage, and rail-to-rail operation.
FAQ
What is the default switch state of MAX4738EUD+TG51?
The MAX4738EUD+TG51 implements four normally closed (NC) SPST switches. When all digital inputs (IN1–IN4) are logic LOW, each COM–NC path remains conductive. This fail-safe default state ensures signal continuity during power-up, reset, or control signal loss - critical in audio routing and sensor monitoring applications where open-circuit failure is unacceptable. The MAX4738EUD+TG51 achieves this via internal CMOS transistor topology configured for NC operation.
Does MAX4738EUD+TG51 support USB 2.0 high-speed (480Mbps) operation?
No, the MAX4738EUD+TG51 is specified and characterized only for USB 1.1 full-speed (12Mbps) operation. Its −55dB off-isolation at 10MHz and 300MHz −3dB bandwidth are insufficient for USB 2.0 high-speed signaling, which requires >500MHz bandwidth and stricter jitter and return-loss specifications. For USB 2.0, designers should select dedicated high-speed analog switches such as the MAX4989 or similar devices explicitly rated for 480Mbps compliance.
Can MAX4738EUD+TG51 operate with a +1.8V supply and still drive +3.3V logic inputs?
Yes, the MAX4738EUD+TG51 digital inputs are overvoltage-tolerant and accept control signals up to V+ + 0.3V regardless of supply voltage. With a +1.8V V+ supply, IN1–IN4 can safely interface with +3.3V logic outputs without level-shifting circuitry. Input thresholds are guaranteed at +0.5V (VIL) and +1.4V (VIH) under +1.8V–+3.6V supply conditions - ensuring reliable recognition of standard 3.3V CMOS logic levels even at minimum V+.
What is the maximum continuous analog current rating for MAX4738EUD+TG51?
The MAX4738EUD+TG51 supports ±100mA continuous current through each COM, NC, or NO terminal (as applicable - note MAX4738 uses NC terminals). This rating applies across the full operating temperature range (−40°C to +85°C) and supply voltage range (+1.8V to +5.5V). Exceeding ±100mA may cause thermal overstress or parametric shift; for pulsed operation, peak current up to ±200mA is allowed at 1ms duration and 10% duty cycle.
How does the on-resistance flatness of MAX4738EUD+TG51 affect audio signal quality?
The MAX4738EUD+TG51 specifies ≤1.2Ω on-resistance flatness (RFLAT(ON)) over the full analog signal range (GND to V+) at +3V supply. This tight flatness ensures minimal variation in insertion loss across the audio band (20Hz–20kHz), preventing amplitude distortion and frequency-dependent attenuation. Combined with 0.03% THD and 15pF on-capacitance, it preserves wideband audio fidelity in line-level routing applications without requiring post-switch gain compensation.
MAX4738EUD+TG51 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Switch Circuit:
- -
- Multiplexer/Demultiplexer Circuit:
- -
- Number of Circuits:
- -
- On-State Resistance (Max):
- -
- Channel-to-Channel Matching (ΔRon):
- -
- Voltage - Supply, Single (V+):
- -
- Voltage - Supply, Dual (V±):
- -
- Switch Time (Ton, Toff) (Max):
- -
- -3db Bandwidth:
- -
- Charge Injection:
- -
- Channel Capacitance (CS(off), CD(off)):
- -
- Current - Leakage (IS(off)) (Max):
- -
- Crosstalk:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
MAX4738EUD+TG51 FAQ
1.How can I place an order for MAX4738EUD+TG51 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4738EUD+TG51 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+TG51 reliable?
The price and inventory of MAX4738EUD+TG51 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4738EUD+TG51 is usually 5 days.
3.What payment methods are accepted for MAX4738EUD+TG51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4738EUD+TG51 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4738EUD+TG51?
MAX4738EUD+TG51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4738EUD+TG51 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+TG51?
For technical support, including MAX4738EUD+TG51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4738EUD+TG51 requirements.
6.How does Aetrix verify that MAX4738EUD+TG51 is sourced from the original manufacturer or authorized distributors?
All MAX4738EUD+TG51 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+TG51 meets industry standards.
7.What is the process for return or replacement of MAX4738EUD+TG51?
All MAX4738EUD+TG51 units undergo pre-shipment inspection (PSI). If there is an issue with MAX4738EUD+TG51, 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+TG51 part is unused and in its original packaging.
Return procedure for MAX4738EUD+TG51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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