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 guaranteed 1GHz toggle frequency with 600mV differential output swing, 270ps propagation delay, and 10ps output-to-output skew. It serves as a high-speed clock/data level translator in precision timing distribution paths for DSLAMs, base stations, and mass storage systems.

For engineers reviewing the MAX9372EUA+ datasheet, MAX9372EUA+ pinout, MAX9372EUA+ application, or MAX9372EUA+ equivalent, this device supports critical signal integrity requirements including deterministic jitter ≤40ps (P-P), ESD protection >2kV HBM, flow-through pinout for PCB routing efficiency, and open-input default-high behavior for robust system startup.

Technical Context

The MAX9372EUA+ implements two independent bipolar transistor-based LVTTL/TTL input stages driving complementary LVPECL/PECL output pairs, each terminated to VCC − 2.0V via external 50Ω resistors. Its fixed 3.0V–3.6V supply range targets low-voltage 3.3V systems while maintaining full LVPECL voltage compliance (VOH = VCC − 1.145V, VOL = VCC − 1.945V).

It features industry-standard flow-through pinout across all packages, with matched trace-length routing support for <10ps inter-output skew. The device operates over −40°C to +85°C and uses no internal termination-external Thevenin or parallel 50Ω termination is required per output pair to maintain 50Ω characteristic impedance and minimize reflections.

Key Specifications

Pinout & Package

MAX9372EUA+ is housed in an 8-pin µMAX package (3mm × 3mm, 0.5mm pitch), thermally rated at +221°C/W junction-to-ambient in still air. Its flow-through pinout minimizes trace crossovers and supports controlled-impedance routing on dense PCBs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC100EPT22DG and SY100EL15ZC, the MAX9372EUA+ uniquely delivers dual-channel 1GHz LVPECL translation in a single 3.3V-optimized µMAX package, balancing integration density, guaranteed high-frequency performance, and industrial temperature support without compromising skew or jitter specs.

Availability

MAX9372EUA+ is available at Aetrix Electronics and suitable for DSLAM clock distribution, base station timing interfaces, and mass storage SAS/SATA timing applications requiring stable component supply, long-term lifecycle assurance, and consistent parametric performance across production batches.

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) is a U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and computing markets.

The MAX9372EUA+ belongs to Maxim's high-speed interface translator product line, engineered specifically for precision clock/data level shifting in telecom infrastructure and datacom equipment where signal integrity, skew control, and wide temperature operation are mandatory.

FAQ

What is the recommended termination for MAX9372EUA+ LVPECL outputs?

Each differential LVPECL output pair (e.g., Q0 and Q0) must be terminated with two 50Ω resistors-one from each output to VCC − 2.0V-or equivalently with a Thevenin network yielding 50Ω to VCC − 2.0V. This ensures correct VOH/VOL levels, maintains 50Ω characteristic impedance, and minimizes output-to-output skew. Improper termination causes degraded swing, increased jitter, and timing violations in the MAX9372EUA+.

Does MAX9372EUA+ support single-ended output extraction?

Yes, MAX9372EUA+ supports single-ended use: either Q or Q output can be taken as a pseudo-LVPECL signal, but both outputs must still be terminated to VCC − 2.0V to preserve DC bias and common-mode stability. Using only one side degrades noise immunity and increases deterministic jitter by up to 15ps-verified in MAX9372EUA+ characterization data at 1GHz.

What is the maximum allowable supply voltage for MAX9372EUA+?

The absolute maximum VCC for MAX9372EUA+ is +4.0V, but its specified operating range is strictly 3.0V to 3.6V. Operation above 3.6V violates the device's production-tested specifications and risks exceeding junction temperature limits due to increased ICC (up to 28mA typical). For reliable long-term function, MAX9372EUA+ must be powered within 3.0V–3.6V.

How does the open-input default behavior work in MAX9372EUA+?

MAX9372EUA+ integrates internal pull-up circuitry on each D0 and D1 input, forcing corresponding Q/Q outputs into a high-differential state (Q high, Q low) when inputs are unconnected or driven high-impedance. This eliminates external bias components and ensures defined outputs during power-up, reset, or firmware initialization-critical for fail-safe clock distribution in the MAX9372EUA+.

Is MAX9372EUA+ pin-compatible with MAX9370EUA+ or MAX9371EUA+?

No-MAX9372EUA+ shares the same 8-pin µMAX package and flow-through pinout as MAX9370EUA+ (dual) but differs electrically from MAX9371EUA+ (single). While pin assignments match between MAX9372EUA+ and MAX9370EUA+, MAX9371EUA+ has NC pins and different pin mapping. Substituting MAX9372EUA+ for MAX9371EUA+ would cause functional failure due to incorrect signal routing in the MAX9372EUA+.