Analog Devices Inc./Maxim Integrated MAX4895EETE+T

Overview

The MAX4895EETE+T from Maxim Integrated is a VGA port protector IC integrating level-translating buffers and ESD protection for R/G/B, H/V sync, and DDC (SDA/SCL) signals. It features ±15kV HBM ESD protection on seven terminals, 3mm × 3mm TQFN-16 package, -40°C to +85°C operation, and drives ±10mA per H/V output while meeting VESA TTL-compatible output levels.

For engineers reviewing the MAX4895EETE+T datasheet, MAX4895EETE+T pinout, MAX4895EETE+T application, or MAX4895EETE+T equivalent, key selection criteria include RGB port capacitance (≤3pF), dual-voltage level-shifting capability (VL-referenced inputs / VCC-referenced outputs), enable-controlled H/V and DDC switching, and full compliance with IEC 61000-4-2 contact discharge (±8kV).

Technical Context

The MAX4895EETE+T implements dual-domain signal conditioning: H/V sync paths use CMOS-to-TTL level-shifting buffers with EN-controlled output enable/disable, while DDC paths employ nMOS clamping switches for bidirectional I²C level translation between VL (2.0V–VCC) and VCC (4.5V–5.5V). All seven protected terminals (R, G, B, H1, V1, SDA1, SCL1) integrate high-voltage ESD structures rated to ±15kV HBM and ±8kV IEC 61000-4-2 contact discharge.

RGB terminals provide passive ESD protection only-no signal buffering or level shifting-with ≤2.2pF typical output capacitance and ±1μA leakage at VCC = +5.5V. The device operates across extended temperature range (-40°C to +85°C) with quiescent current ≤5μA per supply rail (ICC and IL), supporting low-power graphics subsystems in space-constrained applications.

Key Specifications

Pinout & Package

The MAX4895EETE+T is housed in a 16-pin, 3mm × 3mm TQFN-EP package with exposed thermal pad (EP). Pin 6 is no-connect (N.C.), and EP must be connected to GND or left unconnected; for optimal thermal performance, it should be soldered to a large copper area.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar VGA interface protection and level-shifting applications.

Compared with MAX4896EETE+T and TPD12S016RGER, the MAX4895EETE+T delivers optimal balance of ultra-low power (≤5μA), precise enable control for both sync and DDC paths, and minimal RGB loading-making it the preferred choice for portable and thermally constrained VGA interface designs.

Availability

The MAX4895EETE+T is available at Aetrix Electronics and suitable for notebook computers, desktop graphics cards, server KVM interfaces, and industrial panel PCs requiring stable component supply, guaranteed RoHS compliance, and full lifecycle support.

Supply support for MAX4895EETE+T 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, computing, and communications markets.

The MAX4895EETE+T belongs to Maxim's VGA interface protection product line, designed specifically to simplify robust analog video interface implementation in space- and power-constrained systems while eliminating discrete ESD and level-shifting components.

FAQ

What is the primary function of the MAX4895EETE+T in a VGA interface?

The MAX4895EETE+T serves as an integrated VGA port protector and level translator. It provides ±15kV HBM ESD protection on R, G, B, H1, V1, SDA1, and SCL1 pins; shifts H/V sync signals from low-voltage CMOS (VL-referenced) to full +5V TTL levels; and translates DDC (I²C) signals bidirectionally between VL and VCC domains using nMOS clamping switches. Its role is to harden the VGA interface against electrical stress while ensuring signal integrity and protocol compatibility.

Can the MAX4895EETE+T operate with a VL supply of 2.5V?

Yes, the MAX4895EETE+T supports VL from +2.0V to VCC (up to +5.5V). At VL = +2.5V, the H0/V0 input thresholds scale accordingly (VIH ≈ 1.3V min), and DDC clamping occurs at approximately VL − 0.7V ≈ +1.8V-ensuring compatibility with 2.5V graphics controllers. Electrical Characteristics tables confirm operation across this full VL range, and typical performance is validated at VL = +3.3V and +5.0V.

How does the EN pin affect DDC communication on the MAX4895EETE+T?

The EN pin controls both H/V sync outputs and DDC signal routing. When EN = high, SDA0/SCL0 are connected to SDA1/SCL1, enabling full bidirectional DDC communication between graphics controller and monitor. When EN = low, SDA1 and SCL1 enter high-impedance state, effectively isolating the monitor-side DDC bus-this prevents spurious communication during GPU initialization or hot-plug events, a critical feature for reliable display enumeration.

What is the maximum allowable capacitance on the R, G, B pins of the MAX4895EETE+T, and why does it matter?

The MAX4895EETE+T specifies maximum R/G/B output capacitance of 3pF (typical 2.2pF). This low value is essential to preserve analog video signal integrity: excessive capacitance attenuates high-frequency content, degrades edge rates, and causes color blurring or ghosting in VGA output. At UXGA resolution (1600×1200, ~67MHz pixel clock), even 5pF can induce measurable rise-time degradation-so the ≤3pF spec ensures compatibility with high-fidelity analog video transmission.

Does the MAX4895EETE+T require external decoupling capacitors, and if so, where?

Yes, the MAX4895EETE+T requires two 1μF ceramic decoupling capacitors: one between VCC (Pin 15) and GND (Pin 4), and another between VL (Pin 5) and GND. These must be placed as close as possible to their respective pins to suppress high-frequency noise and ensure stable ESD structure operation. The datasheet explicitly states "Bypass VCC and VL to ground with a 1µF ceramic capacitor as close as possible to the device," and omitting either capacitor risks degraded ESD performance and potential signal integrity issues.