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Analog Devices Inc./Maxim Integrated MAX4550EWI
- Part No.:
- MAX4550EWI
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog Switches - Special Purpose
- Package:
- 28-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MAX4550EWI.pdf
- Description:
- DUAL 4X2 AUDIO/VIDEO XPOINT S/W
- Quantity:
- Payment:
- Shipping:
Inventory:284
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Product details
Overview
MAX4550EWI from Maxim Integrated is a serially controlled, dual 4×2 analog crosspoint switch IC designed for audio/video signal routing in multimedia systems. It features I²C-compatible 2-wire interface, ±2.7V to ±5.5V dual-supply or +2.7V to +5.5V single-supply operation, 43Ω typical on-resistance, -110dB off-isolation at 20kHz, and selectable clickless switching mode per output. It is used in set-top boxes and high-end audio systems requiring low-distortion, low-crosstalk analog switching.
For engineers reviewing the MAX4550EWI datasheet, MAX4550EWI pinout, MAX4550EWI application, or MAX4550EWI equivalent, this page delivers verified electrical parameters, package mapping, functional pin roles, real-world use cases, and validated alternative parts - all confirmed against Maxim's official documentation and ordering information for the MAX4550EWI (28-pin wide SO, -40°C to +85°C).
Technical Context
The MAX4550EWI integrates two independent 4-input × 2-output analog switch matrices with programmable clickless (soft-switching) mode per output, internal resistive bias networks (BIASH/BIASL), and four auxiliary digital outputs (Q0–Q3). Its I²C-compatible 2-wire interface supports fast-mode (400kHz) operation with addressable slave configuration via A0/A1 pins.
It operates across dual ±2.7V to ±5.5V or single +2.7V to +5.5V supplies, delivering 0.014% THD+N into 1kΩ at 20kHz, 14MHz 0.1dB bandwidth (dual supply), and -95dB crosstalk at audio frequencies. Shunt inputs SA/SB enable external capacitor connection to improve off-isolation beyond -110dB.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-Resistance | 43Ω typical (±5V supplies); ensures minimal signal attenuation and voltage drop in audio/video paths. |
| On-Resistance Matching | 5Ω typical between channels; maintains balanced gain and phase across parallel signal paths. |
| Off-Isolation | -110dB at 20kHz; suppresses audible leakage between inactive input/output pairs in audio applications. |
| Crosstalk | -95dB at 20kHz; prevents audible interference between simultaneously active channels. |
| THD+N | 0.014% with 1kΩ load; preserves fidelity in high-fidelity audio routing without harmonic corruption. |
| Supply Range | +2.7V to +5.5V (single) or ±2.7V to ±5.5V (dual); supports legacy ±5V and modern low-voltage system designs. |
| Interface | I²C-compatible 2-wire (fast-mode, 400kHz); enables simple microcontroller integration with minimal GPIO usage. |
Pinout & Package
MAX4550EWI is housed in a 28-pin wide SO (Small Outline) package, RoHS-compliant, with exposed pad not present. Pin pitch is 1.27mm; body width is 7.5mm; total length is 17.9mm. Thermal resistance θJA = 12.5°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SA) | Shunt input to crosspoint A | Connects to AC ground or shunt capacitor to improve off-isolation of matrix A; extends isolation beyond -110dB. |
| 9 (NO1A), 11 (NO2A), 6 (NO3A), 5 (NO4A) | Outputs of crosspoint A | Two independently routable outputs per 4×2 matrix; each supports clickless or hard switching via register control. |
| 18 (COM1A), 20 (COM1B) | Common inputs to crosspoint A | Input ports accepting analog signals; routed to NO1A–NO4A based on I²C-configured switch state. |
| 12 (Q1), 10 (Q0), 17 (Q2), 19 (Q3) | Auxiliary digital outputs | Each sources 1mA / sinks 12mA; used to drive LEDs, enable circuits, or expand µP I/O without external drivers. |
| 14 (SCL), 15 (SDA) | I²C serial interface | SCL accepts 400kHz clock; SDA is bidirectional data line with open-drain output and internal pull-up capability. |
| 13 (A0), 16 (A1) | I²C address bits | Set slave address (10011A1A00); allow up to four MAX4550EWI devices on same bus without conflict. |
| 8, 24 (V+), 25 (V-), 21 (GND) | Power terminals | V+ and V- support dual ±5V or single +5V operation; GND is common reference for analog and digital sections. |
| 4 (BIASH), 5 (BIASL) | Bias network terminals | Provide DC bias for AC-coupled inputs; form internal voltage divider to center outputs at V+/2 when enabled. |
Key Features
| Feature | Design Value |
|---|---|
| Selectable clickless switching per output | Eliminates audible pop/click during audio source switching by controlling COM ramp rate; configurable via I²C register. |
| Dual 4×2 crosspoint architecture | Enables independent routing of two separate 4-input signal groups (e.g., HDMI audio + SPDIF + analog stereo + mic) to dual outputs. |
| Integrated bias resistor networks | Four programmable bias pairs (BIASH/BIASL per output) eliminate need for external DC restoration circuitry with AC-coupled inputs. |
| Four auxiliary digital outputs | Q0–Q3 provide general-purpose logic-level outputs with 12mA sink capability - usable for LED indicators or peripheral enable signals. |
| High off-isolation with shunt inputs | SA/SB pins allow external capacitor connection to reduce charge injection and improve off-state rejection beyond -110dB at 20kHz. |
Applications
| Set-Top Box Signal Routing | PC Multimedia Board Audio Switching |
|---|---|
|
Use Scenario: Routing multiple audio/video sources (HDMI, component, composite) to dual outputs (TV + recorder) while maintaining clean audio during channel changes. IC Role / Device Role / Timing Role: Dual 4×2 analog crosspoint switch with per-output clickless mode control and I²C configuration. Use Value: Prevents audible pops during source switching and ensures <0.014% THD+N for studio-grade audio pass-through. |
Use Scenario: Dynamically selecting between onboard audio codec, USB DAC, and optical SPDIF inputs on a high-end sound card. IC Role / Device Role / Timing Role: Low-on-resistance (43Ω) analog switch enabling transparent signal path selection under µP I²C control. Use Value: Maintains signal integrity across full 20Hz–20kHz range with -95dB crosstalk, avoiding channel bleed in multi-source playback. |
| High-End Audio System Matrix | Video Conferencing Audio Hub |
|
Use Scenario: Building a modular preamp/router that accepts 4 analog line-level inputs and routes to 2 balanced outputs with DC bias control. IC Role / Device Role / Timing Role: Dual crosspoint with integrated BIASH/BIASL bias networks enabling direct AC-coupled input handling. Use Value: Eliminates external op-amp bias stages; reduces BOM count and PCB area while preserving -110dB off-isolation. |
Use Scenario: Managing microphone and speaker signals across multiple USB conferencing devices, headsets, and room mics in unified comms hardware. IC Role / Device Role / Timing Role: Analog switch with auxiliary outputs (Q0–Q3) driving mute LEDs and peripheral enable lines synchronously with routing changes. Use Value: Enables coordinated audio path reconfiguration and status indication using a single I²C transaction - no additional GPIO required. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog crosspoint switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4570EWI | Uses 3-wire SPI/QSPI interface instead of I²C; identical pinout, specs, and package; requires CS/SCLK/DIN instead of SCL/SDA. | Preferred where existing design uses SPI peripherals or requires faster command throughput (2.1MHz vs. 400kHz). | Select MAX4570EWI only if SPI interface is available and I²C bus loading must be avoided. |
| TS3USB30E | Single 3×2 USB 2.0 switch; 6Ω on-resistance; no clickless mode; no auxiliary outputs; supports 480Mbps data, not audio-optimized. | Targeted at USB signal switching, not analog audio routing; lacks bias networks, shunt inputs, and THD/N optimization. | Not functionally equivalent; only consider for digital USB path switching - not for MAX4550EWI's analog audio/video role. |
Compared with MAX4570EWI, the MAX4550EWI offers simpler I²C integration and lower firmware overhead, while TS3USB30E serves a fundamentally different (digital high-speed) application space with no audio performance guarantees.
Availability
MAX4550EWI is available at Aetrix Electronics and suitable for set-top box manufacturing, PC multimedia board production, and high-end audio system assembly requiring stable component supply across extended temperature (-40°C to +85°C) and long-lifecycle support.
Supply support for MAX4550EWI 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 precision analog, mixed-signal, and power management ICs for industrial, communications, and consumer applications.
The MAX4550EWI belongs to Maxim's high-performance analog switch product line, engineered specifically for low-distortion, low-crosstalk audio/video signal routing in multimedia equipment with programmable soft-switching capability.
FAQ
What is the operating temperature range for the MAX4550EWI?
The MAX4550EWI is rated for operation from -40°C to +85°C, as confirmed in the Ordering Information table of the official datasheet. This extended temperature grade makes it suitable for industrial and automotive-adjacent multimedia applications where ambient conditions exceed commercial range limits. The MAX4550EWI undergoes full characterization across this range for on-resistance, off-isolation, and THD+N performance.
Does the MAX4550EWI support single-supply operation?
Yes, the MAX4550EWI supports single-supply operation from +2.7V to +5.5V, in addition to ±2.7V to ±5.5V dual-supply mode. At +5V single supply, typical on-resistance is 60Ω, off-isolation is -105dB at 20kHz, and THD+N remains 0.014% into 1kΩ. All I²C interface logic levels are compatible with 3.3V or 5V microcontrollers.
How does the clickless switching mode work in the MAX4550EWI?
The MAX4550EWI implements clickless switching by controlling the slew rate of the common (COM) node during transitions - reducing dV/dt to avoid audible transients. Each output (COM1A, COM1B, COM2A, COM2B) can be individually enabled/disabled for clickless mode via I²C register writes (C5 command bit). The feature is fully functional in both single- and dual-supply configurations.
What are the functions of the SA and SB pins on the MAX4550EWI?
SA (pin 28) and SB (pin 1) are shunt inputs tied to crosspoint A and B, respectively. They accept external capacitors or AC ground connections to improve off-isolation - particularly effective at reducing charge injection and boosting rejection beyond -110dB at 20kHz. These pins are not signal inputs but dedicated noise-reduction terminals referenced in the Pin Description and Applications Information sections.
Can the MAX4550EWI be used with AC-coupled audio inputs?
Yes, the MAX4550EWI supports AC-coupled inputs via its integrated bias networks. Connecting BIASH (pin 4) and BIASL (pin 5) forms an internal voltage divider that biases each output at V+/2, eliminating the need for external DC restoration circuitry. This functionality is programmable per output and documented in the "Using the Internal Bias Resistors" section of the datasheet.
MAX4550EWI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 28-SOIC (0.295", 7.50mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Applications:
- Audio, Video
- Multiplexer/Demultiplexer Circuit:
- 4:2
- Switch Circuit:
- -
- Number of Channels:
- 2
- On-State Resistance (Max):
- 80Ohm
- Voltage - Supply, Single (V+):
- 2.7V ~ 5.5V
- Voltage - Supply, Dual (V±):
- ±2.7V ~ 5.5V
- -3db Bandwidth:
- 14MHz
- Features:
- Break-Before-Make, Clickless, I2C
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- 28-SOIC
MAX4550EWI FAQ
1.How can I place an order for MAX4550EWI through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4550EWI 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 MAX4550EWI reliable?
The price and inventory of MAX4550EWI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4550EWI is usually 5 days.
3.What payment methods are accepted for MAX4550EWI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4550EWI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4550EWI?
MAX4550EWI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4550EWI 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 MAX4550EWI?
For technical support, including MAX4550EWI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4550EWI requirements.
6.How does Aetrix verify that MAX4550EWI is sourced from the original manufacturer or authorized distributors?
All MAX4550EWI 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 MAX4550EWI meets industry standards.
7.What is the process for return or replacement of MAX4550EWI?
All MAX4550EWI units undergo pre-shipment inspection (PSI). If there is an issue with MAX4550EWI, 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 MAX4550EWI part is unused and in its original packaging.
Return procedure for MAX4550EWI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX4550EWI Tags
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