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Analog Devices Inc./Maxim Integrated MAX4744ELB+TGC1
- Part No.:
- MAX4744ELB+TGC1
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog Switches - Special Purpose
- Package:
- -
- Datasheet:
-
MAX4744ELB+TGC1.pdf
- Description:
- INTEGRATED CIRCUIT
- Quantity:
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Product details
Overview
MAX4744ELB+TGC1 from Maxim Integrated is a dual SPDT audio analog switch optimized for low-distortion signal routing in portable audio systems. It supports negative signal swing down to VCC − 5.5V, features 0.6Ω typical on-resistance, 0.1Ω max channel-to-channel matching, and operates from a single +1.8V to +5.5V supply. It is used in speaker switching and audio path selection in MP3 players and cellular phones.
For engineers reviewing the MAX4744ELB+TGC1 datasheet, MAX4744ELB+TGC1 pinout, MAX4744ELB+TGC1 application, or MAX4744ELB+TGC1 equivalent, key selection criteria include negative rail capability (VCC − 5.5V), click/pop suppression via internal shunt resistors, break-before-make timing (20ns), THD of 0.01% (20Hz–20kHz), and µDFN-10 (2mm × 2mm) package compatibility with high-density handheld PCB layouts.
Technical Context
The MAX4744ELB+TGC1 implements two independent SPDT switches controlled by separate CB1/CB2 logic inputs, enabling per-channel signal path selection. Its BiCMOS process delivers low on-resistance flatness (0.55Ω max) and tight RON matching (0.1Ω max) across temperature (−40°C to +85°C).
It integrates shunt resistors on both NO1/NO2 and NC1/NC2 terminals to discharge floating node capacitance during state transitions-reducing audible click-and-pop in speaker/audio amplifier interfaces. Break-before-make switching (20ns delay) prevents momentary shorting between NC and NO paths during reconfiguration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +1.8V to +5.5V single supply - enables direct interface with Li-ion battery rails and 3.3V/5V logic without level shifters |
| On-Resistance (RON) | 0.6Ω typical at VCC = 3.3V - minimizes insertion loss and thermal drift in audio signal paths |
| On-Resistance Matching | 0.1Ω max between channels - ensures balanced stereo signal routing without gain mismatch |
| Analog Signal Range | VCC − 5.5V to VCC - supports true bipolar audio signals including sub-ground levels without clipping |
| Total Harmonic Distortion | 0.01% typical (20Hz–20kHz) - preserves audio fidelity in consumer playback applications |
| Off-Isolation | −68dB typical at 100kHz - suppresses crosstalk between active and inactive audio channels |
| Crosstalk | −75dB typical at 100kHz - maintains channel separation in dual-speaker or headset/mic routing |
| Turn-On/Off Time | 55ns / 36ns (NO), 560ns / 540ns (NC) at VCC = 2.7V - fast enough for dynamic audio source switching without audible artifacts |
Pinout & Package
MAX4744ELB+TGC1 is housed in a 10-pin µDFN package (2mm × 2mm, 0.8mm height) with wettable flanks, optimized for space-constrained portable designs and compatible with automated optical inspection (AOI).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | CB1 | Digital control input for Switch 1 - selects NC1 or NO1 connection to COM1 |
| 2 | NO1 | Normally open terminal of Switch 1 - connects to COM1 when CB1 = 1 |
| 3 | GND | Analog/digital ground reference - must be low-impedance return path for audio signals and supply current |
| 4 | NO2 | Normally open terminal of Switch 2 - connects to COM2 when CB2 = 1 |
| 5 | CB2 | Digital control input for Switch 2 - selects NC2 or NO2 connection to COM2 |
| 6 | COM2 | Common terminal of Switch 2 - bidirectional I/O node routed to NO2 or NC2 |
| 7 | NC2 | Normally closed terminal of Switch 2 - default path to COM2 when CB2 = 0 |
| 8 | VCC | Positive supply input (1.8V–5.5V) - powers internal logic and analog switch core |
| 9 | NC1 | Normally closed terminal of Switch 1 - default path to COM1 when CB1 = 0 |
| 10 | COM1 | Common terminal of Switch 1 - bidirectional I/O node routed to NO1 or NC1 |
Key Features
| Feature | Design Value |
|---|---|
| Negative rail capability | Supports analog signals as low as VCC − 5.5V - enables distortion-free handling of AC-coupled or DC-biased audio below ground |
| Integrated shunt resistors | 2kΩ–5kΩ on all NO/NC pins - automatically discharges floating node capacitance to eliminate click/pop during switching |
| Break-before-make timing | 20ns guaranteed delay - prevents transient shorting between NC and NO paths, critical for clean audio muting |
| Low THD + high off-isolation | 0.01% THD and −68dB off-isolation - preserves signal integrity in stereo headphone and speaker driver interfaces |
| Wide supply range & rail-to-rail logic | Operates from 1.8V–5.5V; accepts 0V/+5.5V logic inputs regardless of VCC - simplifies mixed-voltage system integration |
Applications
| Speaker Switching | Power Routing |
|---|---|
Use Scenario: Dynamically selecting between mono speaker and stereo earpiece outputs in smartphones during call mode transitions. IC Role / Device Role / Timing Role: Dual SPDT switch routing audio amplifier output to either speaker or headset jack while maintaining DC bias stability. Use Value: Internal shunt resistors and break-before-make timing eliminate audible pop during output switching, meeting EN 50332 loudspeaker safety compliance. | Use Scenario: Isolating power domains between baseband processor and RF transceiver in LTE handsets during sleep/wake cycles. IC Role / Device Role / Timing Role: Analog switch controlling VBAT routing to subsystems using logic-controlled ON/OFF states with minimal leakage (<50nA). Use Value: 0.6Ω RON and 0.1Ω matching ensure consistent voltage drop across dual paths, preventing power sequencing faults. |
| Cellular Phones | MP3 Players |
Use Scenario: Managing microphone input paths between main mic and secondary noise-canceling mic in dual-mic voice capture systems. IC Role / Device Role / Timing Role: Bidirectional SPDT switch selecting analog mic signal source before ADC, supporting both differential and single-ended configurations. Use Value: VCC − 5.5V signal range accommodates ±2.5V mic bias schemes without external clamping diodes or level shifters. | Use Scenario: Routing line-out signals from DAC to either headphone jack or external speaker amplifier in portable media players. IC Role / Device Role / Timing Role: Low-THD analog switch providing selectable audio output paths with simultaneous channel matching for stereo balance. Use Value: 0.01% THD and −75dB crosstalk preserve stereo imaging and dynamic range in high-fidelity playback. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual SPDT audio switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4744HELB+T | Single CB0 control bit + EN enable; shunt resistors on NO/NC; COM protection when VCC = 0V | Requires simplified control logic (1-bit + EN); preferred where power sequencing robustness is critical | Select when system-level VCC sequencing cannot be guaranteed and COM_ may be driven before supply ramp-up |
| TS5A23157DCUR | 0.9Ω RON (typ), no integrated shunt resistors, no negative rail support (−0.5V min), 1.65V–5.5V supply | Lacks click/pop suppression and sub-ground signal handling; requires external RC networks for pop reduction | Choose only if negative rail operation is unnecessary and board area allows discrete pop-suppression components |
Compared with MAX4744HELB+T, MAX4744ELB+TGC1 offers independent per-switch control (CB1/CB2) but lacks COM_ protection at VCC = 0V; versus TS5A23157DCUR, it delivers superior audio performance (lower RON, THD, and isolation) and built-in pop suppression-making it optimal for space-constrained, high-fidelity portable audio.
Availability
MAX4744ELB+TGC1 is available at Aetrix Electronics and suitable for cellular phones, MP3 players, notebook computers, and PDAs requiring stable component supply, long-term lifecycle support, and lead-free compliance.
Supply support for MAX4744ELB+TGC1 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 U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and consumer applications.
The MAX4744 family targets portable audio signal routing, delivering low-RON, clickless switching, and negative rail capability specifically for battery-powered devices with stringent size and fidelity requirements.
FAQ
What is the maximum allowable analog signal voltage range for MAX4744ELB+TGC1?
The MAX4744ELB+TGC1 supports analog signals from VCC − 5.5V up to VCC. For example, at VCC = 3.3V, the valid range is −2.2V to +3.3V. This negative rail capability enables distortion-free passage of AC-coupled audio signals that swing below ground, eliminating need for external biasing circuitry in headphone or speaker driver interfaces. Signals exceeding these limits are clamped by internal diodes.
Does MAX4744ELB+TGC1 include built-in click-and-pop suppression?
Yes, MAX4744ELB+TGC1 integrates shunt resistors on all NO1, NO2, NC1, and NC2 terminals. These resistors (2kΩ–5kΩ typical) automatically discharge residual capacitance at unconnected switch nodes during state transitions, reducing DC step transients that cause audible clicks and pops in speakers or headphones. This feature, combined with break-before-make timing (20ns), makes MAX4744ELB+TGC1 suitable for consumer audio applications without external pop-suppression components.
What is the on-resistance matching specification for MAX4744ELB+TGC1, and why does it matter?
MAX4744ELB+TGC1 guarantees ≤0.1Ω maximum on-resistance matching (ΔRON) between its two SPDT switches at VCC = 2.7V and TA = −40°C to +85°C. This tight matching ensures identical insertion loss and frequency response across stereo channels-critical for maintaining left/right balance in headphone amplifiers, speaker selectors, and audio codec interfaces. Mismatch >0.1Ω would introduce audible channel imbalance or phase skew in high-fidelity playback.
Can MAX4744ELB+TGC1 be used with a 1.8V supply, and what performance trade-offs occur?
Yes, MAX4744ELB+TGC1 is fully specified down to +1.8V supply. At 1.8V, on-resistance increases to ~1.0Ω (max), turn-on time lengthens to ~700ns, and THD rises slightly-but remains <0.05% (typ). The device retains full negative rail capability (VCC − 5.5V = −3.7V), making it ideal for ultra-low-power portable designs powered directly by single-cell Li-ion batteries. No functionality is lost at minimum VCC.
How does the break-before-make timing of MAX4744ELB+TGC1 prevent audio artifacts?
MAX4744ELB+TGC1 enforces a guaranteed 20ns break-before-make delay: the NC path opens completely before the NO path closes. This prevents momentary shorting between two audio sources (e.g., speaker and headset), which would otherwise inject transient current spikes into the amplifier output stage-causing loud, damaging "pop" sounds. The timing is process- and temperature-compensated across −40°C to +85°C, ensuring reliable artifact-free switching in all operating conditions.
MAX4744ELB+TGC1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Applications:
- -
- Multiplexer/Demultiplexer Circuit:
- -
- Switch Circuit:
- -
- Number of Channels:
- -
- On-State Resistance (Max):
- -
- Voltage - Supply, Single (V+):
- -
- Voltage - Supply, Dual (V±):
- -
- -3db Bandwidth:
- -
- Features:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- -
MAX4744ELB+TGC1 FAQ
1.How can I place an order for MAX4744ELB+TGC1 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4744ELB+TGC1 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 MAX4744ELB+TGC1 reliable?
The price and inventory of MAX4744ELB+TGC1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4744ELB+TGC1 is usually 5 days.
3.What payment methods are accepted for MAX4744ELB+TGC1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4744ELB+TGC1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4744ELB+TGC1?
MAX4744ELB+TGC1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4744ELB+TGC1 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 MAX4744ELB+TGC1?
For technical support, including MAX4744ELB+TGC1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4744ELB+TGC1 requirements.
6.How does Aetrix verify that MAX4744ELB+TGC1 is sourced from the original manufacturer or authorized distributors?
All MAX4744ELB+TGC1 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 MAX4744ELB+TGC1 meets industry standards.
7.What is the process for return or replacement of MAX4744ELB+TGC1?
All MAX4744ELB+TGC1 units undergo pre-shipment inspection (PSI). If there is an issue with MAX4744ELB+TGC1, 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 MAX4744ELB+TGC1 part is unused and in its original packaging.
Return procedure for MAX4744ELB+TGC1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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