Analog Devices Inc./Maxim Integrated MAX463ENG

Overview

MAX463ENG from Maxim Integrated is a triple-channel RGB video switch and buffer with unity-gain amplifiers, designed for broadcast-quality color-signal multiplexing. It operates from ±5V supplies, delivers ±2V output swing into 75Ω, achieves 100MHz unity-gain bandwidth, and features 20ns channel switching time-enabling precise RGB signal routing in professional video overlay editors and security systems.

For engineers reviewing the MAX463ENG datasheet, MAX463ENG pinout, MAX463ENG application, or MAX463ENG equivalent, key selection criteria include differential gain/phase error (0.01%/0.03°), input capacitance (5pF), disabled-mode high-Z outputs, back-terminated coaxial cable drive capability, and TTL-compatible digital control interface with latch-enable support.

Technical Context

The MAX463ENG integrates three independent analog channels, each with a unity-gain stable amplifier and SPDT switch, configured as a 3P2T (3-pole, 2-throw) RGB video switch. Its bipolar construction yields low 5pF input capacitance regardless of channel state, minimizing switching transients and preserving signal integrity across wideband video signals up to 100MHz.

Digital control uses CS/A0/EN/LE pins to select between Channel A and Channel B per channel and enable/disable all buffers simultaneously. With LE tied to V+, CS latches both A0 and EN; with LE grounded, EN operates independently-supporting either synchronized shutdown or individual channel enablement in multi-device arrays.

Key Specifications

Pinout & Package

MAX463ENG is housed in a 24-pin narrow plastic DIP package with through-hole mounting, rated for 0°C to +70°C operation. The package includes multiple GND, V+, and V− pins for low-inductance power distribution and thermal dissipation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar RGB video switch and buffer applications.

Compared with MAX465ENG and MAX464ENG, the MAX463ENG offers optimal cost and footprint for triple-input RGB switching with direct unity-gain output drive-making it ideal for 3-source broadcast mixers, tri-head medical displays, and compact RGB overlay hardware where fourth channel or cable-end gain compensation is unnecessary.

Availability

MAX463ENG is available at Aetrix Electronics and suitable for RGB multiplexing, broadcast-quality video overlay systems, and medical imaging equipment requiring stable component supply, long-term obsolescence management, and traceable sourcing for Class II medical and industrial video applications.

Supply support for MAX463ENG 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 demanding performance applications including communications, computing, and industrial systems.

The MAX463–MAX470 product line was engineered specifically for high-fidelity RGB and composite video signal routing, emphasizing low differential gain/phase error, fast switching, and robust coaxial cable drive capability in broadcast, medical, and security video infrastructure.

FAQ

What is the operating temperature range for MAX463ENG?

The MAX463ENG is specified for commercial temperature operation from 0°C to +70°C. This range aligns with standard office and studio environments used in broadcast video equipment, RGB overlay editors, and non-critical medical display subsystems. The device's electrical characteristics-including 100MHz bandwidth and 0.01%/0.03° differential gain/phase error-are guaranteed across this full range, ensuring consistent video fidelity without derating.

Does MAX463ENG support TTL-compatible digital control?

Yes, MAX463ENG supports TTL-compatible digital inputs on CS, A0, EN, and LE pins. Logic thresholds are VIH = 2.0V min and VIL = 0.8V max under ±5V supply conditions. This allows direct interfacing with standard 5V microcontrollers, FPGAs, and logic families without level-shifting. The MAX463ENG also supports latched operation via CS/LE sequencing for glitch-free channel selection in noisy video environments.

Can MAX463ENG outputs be paralleled for higher-current drive?

Yes, MAX463ENG outputs may be safely paralleled when all but one device is placed in logic disable mode (EN = high). In this state, outputs enter high-impedance mode with ~250kΩ resistance, minimizing interaction. For stable paralleling, use series isolation resistors (e.g., 10–22Ω) at each output to dampen potential oscillations from combined output capacitance-verified in Maxim's application circuits for RGB multiplexer expansion.

What is the maximum load capacitance MAX463ENG can drive stably?

The MAX463ENG is internally compensated for stable operation with capacitive loads ≤50pF. When driving larger capacitances (e.g., long cables or multiple downstream inputs), Maxim recommends adding a 12Ω isolation resistor between the output and load-as validated in Figure 3a of the datasheet. This preserves step response fidelity and prevents ringing, maintaining <0.1% settling accuracy even with 100pF loads.

How does MAX463ENG achieve low crosstalk in RGB applications?

MAX463ENG achieves >60dB adjacent-channel crosstalk through physical layout: all analog input pins (IN0A–IN2B) are surrounded by AC-grounded pins (GND, V+, V−, or hard-wired logic inputs), forming a guard ring that suppresses parasitic coupling. This architecture-combined with low 5pF input capacitance and bipolar process design-ensures R/G/B channel isolation remains effective up to 10MHz, critical for maintaining color purity in RGB video systems.