Analog Devices Inc./Maxim Integrated MAX9372EUA

Overview

MAX9372EUA from Maxim Integrated is a dual LVTTL/TTL-to-differential LVPECL/PECL translator optimized for 3.0V to 3.6V operation, delivering 1GHz toggle frequency, 270ps propagation delay, and 10ps output-to-output skew across two independent channels. It serves as a high-speed clock/data level shifter in precision timing distribution systems requiring low-jitter differential signaling.

For engineers reviewing the MAX9372EUA datasheet, MAX9372EUA pinout, MAX9372EUA application, or MAX9372EUA equivalent, this page provides verified package mapping (8-pin µMAX), confirmed dual-channel LVPECL translation behavior, supply-voltage-limited operation (3.0–3.6V), thermal derating data, and validated alternatives with documented functional and electrical distinctions.

Technical Context

The MAX9372EUA implements bipolar-based differential PECL/LVPECL output stages with internal pull-up logic ensuring outputs default to high when inputs are open. Its dual-channel architecture supports independent signal translation with matched propagation paths, enabling precise skew control critical for clock fanout and serialized data alignment.

It requires 50Ω termination to VCC − 2.0V on each differential pair and operates only within its specified 3.0V–3.6V supply range-unlike the wider-range MAX9370/MAX9371. Output swing is guaranteed ≥600mV differential under 1GHz toggling, with added deterministic jitter ≤40ps (P-P) and random jitter ≤0.23ps (RMS).

Key Specifications

Pinout & Package

MAX9372EUA is housed in an 8-pin µMAX package (pin-compatible with SO and SOT23 variants), measuring 3.05mm × 3.05mm × 1.05mm with exposed pad for thermal enhancement. Thermal resistance θ_JA = +221°C/W in still air.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual LVTTL-to-LVPECL translation applications.

Compared with MC100EPT22DG and SN65LVDS31DR, the MAX9372EUA uniquely delivers 1GHz operation within a 3.3V-native supply envelope while maintaining LVPECL-compliant output levels-making it irreplaceable in space-constrained, thermally sensitive 3.3V telecom clock trees.

Availability

MAX9372EUA is available at Aetrix Electronics and suitable for DSLAM timing distribution, base station clock fanout, and mass storage SAS expander applications requiring stable component supply, long-term lifecycle support, and guaranteed industrial temperature performance.

Supply support for MAX9372EUA 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, mixed-signal, and high-speed interface ICs for industrial, communications, and computing markets.

The MAX9372EUA belongs to Maxim's high-speed translator product line, engineered specifically for low-skew, low-jitter level conversion in telecom infrastructure clock distribution and serial data link applications.

FAQ

What is the maximum supply voltage for MAX9372EUA?

The MAX9372EUA has an absolute maximum VCC rating of +4.0V. Operation above 3.6V violates the recommended operating conditions and risks permanent damage. The device is characterized and guaranteed only from 3.0V to 3.6V; exceeding 3.6V voids parametric guarantees including propagation delay, skew, and output swing. Always use a regulated 3.3V supply with ±5% tolerance for reliable MAX9372EUA operation.

Does MAX9372EUA support single-ended input configurations?

Yes, the MAX9372EUA accepts standard LVTTL/TTL single-ended inputs on D0 and D1 pins. Each input is fully compatible with 3.3V logic families, requiring VIH ≥2.0V and VIL ≤0.8V. No external biasing or termination is needed-the internal input structure includes pull-up circuitry that drives outputs high when inputs are left unconnected. This makes MAX9372EUA suitable for direct interfacing with FPGAs, microcontrollers, and clock generators without additional level-shifting components.

Can MAX9372EUA drive unterminated LVPECL loads?

No, MAX9372EUA requires proper 50Ω termination on both sides of each differential pair-specifically to VCC − 2.0V-to establish correct common-mode voltage and achieve guaranteed 600mV differential swing. Driving unterminated or incorrectly terminated loads causes degraded output levels, increased jitter, and potential device overstress due to reflected energy. The datasheet mandates 50Ω±1% resistors from Qx and Qx̅ to VCC − 2.0V; Thevenin equivalents are acceptable only if they replicate this exact DC operating point.

How does MAX9372EUA differ from MAX9370EUA?

The MAX9372EUA differs from MAX9370EUA primarily in supply voltage range and thermal performance. MAX9372EUA operates strictly from 3.0V to 3.6V and features lower ICC (18–22mA vs. 20–28mA for MAX9370EUA), while MAX9370EUA supports 3.0V to 5.25V. Both share identical pinout, 270ps propagation delay, and 10ps skew-but MAX9372EUA's narrower voltage window optimizes it for modern 3.3V-only systems, whereas MAX9370EUA targets mixed-voltage or legacy 5V designs. Their µMAX packages are mechanically identical.

Is MAX9372EUA pin-compatible with MC100EL22?

No, MAX9372EUA is not pin-compatible with MC100EL22. While both are dual LVTTL-to-PECL translators, MC100EL22 uses a 16-pin SOIC package with different pin assignments-including separate V_EE and V_CC supplies-and lacks flow-through routing. MAX9372EUA uses an 8-pin µMAX with D0/D1 inputs adjacent to their respective Q0/Q0̅ and Q1/Q1̅ outputs. Direct replacement would require PCB redesign. MC100EL22 also requires negative supply rails, unlike the single-positive-rail MAX9372EUA.