MAX311EWN+ 8-Channel CMOS RF Video Multiplexer | Analog Devices
MPN: MAX311EWN+ ✓ ActiveMAX311EWN+ Overview
A video multiplexer is a semiconductor switching device that connects multiple signal inputs to a common output path. In the product hierarchy, the MAX311EWN+ is an analog switch and multiplexer IC, which is a type of interface IC used to route high-speed signals under digital control. The MAX311 family is identified by Analog Devices as an 8-channel CMOS RF/video multiplexer. The wide SOIC package provides a practical option for conventional PCB assembly and offers enough mechanical spacing for production inspection compared with a fine-pitch package.
The MAX311EWN+ uses CMOS switching circuitry to control RF or video signal paths. CMOS implementation is suited to high-input-impedance systems because it can provide low loading on the source signals while accepting digital control inputs from a controller. The multiplexing function can reduce the number of separate downstream receivers, comparators, or signal-processing channels required when several sources must be routed through a common processing chain.
Primary applications include video measurement systems, multimedia routing, broadcast and professional video equipment, camera and imaging test setups, RF test fixtures, and compact embedded video systems. The 8-channel configuration allows a controller to scan or select among multiple sources, making the device useful in automatic test equipment where repetitive routing is required. Designers should also evaluate signal attenuation, isolation, switching speed, bandwidth, control levels, and channel count against the specific source impedance and termination network.
For PCB implementation, place the device close to the routed signals and provide a continuous ground reference around the package. Keep high-frequency video traces short and use controlled-impedance routing when trace geometry or dielectric properties affect signal quality. Decoupling near the supply pins should follow the capacitor-selection and placement guidance in the manufacturer data sheet. The control traces should be kept away from sensitive analog paths to minimize switching transients and unintended coupling.
This page organizes the manufacturer identification, exact orderable MPN, package information, functional requirements, application guidance, comparison parameters, and engineering considerations into a practical procurement and design reference. It also distinguishes the verified drop-in replacement from package or channel-count mismatches, helping engineers avoid substitutions that appear similar but would require PCB changes or redesign.
Drop-in alternatives for MAX311EWN+ — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
MAX311CWN+
✅ Drop-In📋 Reference alternative (not in catalog)
MAX311EWN+ Specifications
| Manufacturer | Analog Devices |
| Product Type | CMOS RF/Video Multiplexer |
| Channel Count | 8 channels |
| Switching Type | Multiplexer |
| Process Technology | CMOS |
| Signal Type | RF/Video |
| Package | 18-pin wide SOIC |
| Mounting Type | Surface Mount |
| Orderable Part Number | MAX311EWN+ |
| Manufacturer Product Family | MAX311 |
MAX311EWN+ 18-pin wide soic Pin Configuration Guide
Pin configuration for MAX311EWN+ (18-pin wide soic package). Pin numbering, functions, and connection diagrams are defined in the manufacturer datasheet. Refer to it for the exact footprint and soldering guidelines.
No detailed pinout data available for MAX311EWN+.
Refer to the datasheet for full pin configuration.
Typical Applications
MAX311EWN+ is suitable for 6 applications: Automated Video Test Equipment, Broadcast Video Signal Routing, Camera and Imaging Test Fixtures, RF Test Signal Multiplexing, Multimedia Input Selection, Embedded Video Routing Systems.
Automated Video Test Equipment
The MAX311EWN+ fits automated video test equipment because its 8-channel CMOS RF/video multiplexing architecture can route multiple source conditions through a shared measurement path. Each selected path should be checked for insertion loss, isolation, on resistance, and bandwidth against the manufacturer data sheet. Place the device close to the source and receiver connections, use controlled-impedance routing where required, and keep digital select traces away from sensitive video nodes. This arrangement reduces repeated switching hardware while retaining a compact 18-pin wide SOIC footprint.
Recommended
Broadcast Video Signal Routing
The MAX311EWN+ is suitable for broadcast and professional video routing when several RF or video sources must be selected before downstream processing. Its CMOS switching implementation can reduce loading when the system uses properly terminated high-impedance video paths. Verify signal amplitude, source impedance, channel isolation, and allowable control levels against the MAX311 data sheet. Keep the selected routes physically short and provide a solid ground reference to minimize coupling and preserve predictable signal behavior.
Recommended
Camera and Imaging Test Fixtures
The MAX311EWN+ can connect multiple camera or imaging-source outputs to a common analysis fixture in automated inspection and characterization systems. The 8-channel organization allows a controller to scan sources without requiring eight duplicated receiver chains. Selectors should use the documented logic thresholds, and unused channels should be handled according to the manufacturer recommendations. Ground-plane continuity and short video traces are important because fixture cables and long board traces can materially affect isolation, attenuation, and crosstalk.
Recommended
RF Test Signal Multiplexing
The MAX311EWN+ can be used as the RF multiplexing element in a bench or production test system that routes several conditioned signals through common downstream instrumentation. The manufacturer identifies the MAX311 family specifically as a CMOS RF/video multiplexer, making it relevant to controlled RF routing applications. The operating frequency must remain within the characterized bandwidth, and source and load impedances should match the signal-path assumptions. PCB launch geometry and return paths require controlled-impedance review to avoid reflections that are not caused by the IC itself.
Recommended
Multimedia Input Selection
The MAX311EWN+ supports multimedia input-selection boards where several video-related sources must be presented to one processing channel. Its 8-channel multiplexing function consolidates routing hardware and keeps the controller interface centralized through digital select inputs. Designers should confirm that the voltage levels driving those inputs meet the device requirements and that the selected channel has the required bandwidth and termination. Decoupling placement, continuous ground connectivity, and separation from high-current switching circuitry help preserve a clean signal path.
Recommended
Embedded Video Routing Systems
The MAX311EWN+ fits embedded systems that must switch among multiple analog video or RF sources under software control. The 18-pin wide SOIC package supports conventional surface-mount assembly, while the 8-channel structure can simplify system architecture when several inputs share a downstream converter or processor. Validate the full analog path with the manufacturer insertion-loss and isolation characteristics, and use the documented control truth table when writing firmware. Firmware should also avoid unnecessary channel changes if transient behavior affects the selected signal.
Recommended
Recommended Products Summary
Engineering reference data for MAX311EWN+ — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MAX311CWN+ |
|---|---|---|
| Brand | Analog Devices | Analog Devices |
| Package | 18-pin wide SOIC | 18-pin SOIC - same package |
| Product Type | CMOS RF/Video Multiplexer | CMOS RF/Video Multiplexer |
| Switching Architecture | Multiplexer | Multiplexer |
| Signal Type | RF/Video | RF/Video |
| Process Technology | CMOS | CMOS |
| Mounting Type | Surface Mount | Surface Mount |
Key Differentiators
- Exact 18-pin wide SOIC orderable configuration (vs MAX311CWN+)
- Manufacturer-designated RF and video multiplexing function (vs MAX311CPE)
- Eight-channel MAX311-family architecture (vs MAX311CPE)
Design Notes
Route RF or video nets as short, impedance-controlled paths when the operating frequency requires it. Match the selected channel's source and load impedances to the manufacturer signal-path assumptions, and provide a continuous ground plane under and around the package. Terminate unused channels according to the data-sheet recommendations rather than leaving them as uncontrolled floating paths.
Validate insertion loss, return loss, isolation, and crosstalk in the assembled board rather than relying only on device-level figures. Probe pads, connectors, cable launches, and layer transitions can dominate performance at higher frequencies. Keep the MAX311EWN+ close to the source or receiver connection and use a controlled-impedance stack-up consistent with the routed signal type.
Do not infer that every MAX311 suffix is interchangeable merely because several use a 16-pin or 18-pin SOIC outline. Confirm the exact pin functions, supply limits, select logic, channel topology, and performance limits in the manufacturer documentation. MAX311CPE was identified in a comparison, but its PDIP-16 package and different channel description make it unsuitable as a footprint-compatible replacement for MAX311EWN+.
Compliance Information
Compliance declarations were not identified in the retrieved product-page information and must be confirmed against the current manufacturer documentation before qualification.
