Analog Devices Inc./Maxim Integrated MAX9370EUA+

Overview

MAX9370EUA+ from Maxim Integrated is a dual LVTTL/TTL-to-differential LVPECL/PECL translator IC designed for high-speed clock and data distribution in telecom and datacom systems. It operates up to 1.5GHz, delivers 600mV differential output swing, exhibits 270ps propagation delay, and supports 3.0V–5.25V supply voltage-enabling use in 3.3V or 5.0V infrastructure such as DSLAMs and base station timing modules.

For engineers reviewing the MAX9370EUA+ datasheet, MAX9370EUA+ pinout, MAX9370EUA+ application, or MAX9370EUA+ equivalent, key selection criteria include guaranteed 1GHz operation at 600mV swing, 10ps output-to-output skew between channels, flow-through pinout compatibility with legacy PECL translators, and µMAX package thermal performance (221°C/W θ_JA).

Technical Context

The MAX9370EUA+ implements two independent bipolar transistor-based translation paths, each converting single-ended LVTTL/TTL inputs into complementary LVPECL/PECL outputs terminated to V_CC – 2.0V. Its flow-through pinout minimizes trace length mismatch and preserves signal integrity in high-frequency clock trees.

It features open-input default logic (outputs high when D₀/D₁ float), 40ps peak-to-peak deterministic jitter at 1Gbps, and differential output drive capability compliant with industry-standard 50Ω transmission line requirements-making it suitable for precision clock fanout in synchronous optical networks.

Key Specifications

Pinout & Package

The MAX9370EUA+ is housed in an 8-pin µMAX package (3mm × 3mm, 0.5mm pitch), optimized for high-density PCB layouts and offering 221°C/W junction-to-ambient thermal resistance in still air.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC100EPT22DG and SY100ELT22LZG, the MAX9370EUA+ offers integrated dual-channel operation, wider supply range (3.0–5.25V), higher 1.5GHz toggle rate, and lower 10ps skew-making it optimal for space-constrained, multi-clock-domain telecom infrastructure where board real estate and timing precision are critical.

Availability

MAX9370EUA+ is available at Aetrix Electronics and suitable for DSLAM timing distribution, base station clock fanout, and central office SONET clocking requiring stable component supply across extended temperature and high-frequency performance bands.

Supply support for MAX9370EUA+ 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 semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and computing applications.

The MAX9370EUA+ belongs to Maxim's high-speed interface translator product line, engineered specifically for telecom clock/data distribution where low skew, high bandwidth, and robust LVPECL drive capability are mandatory.

FAQ

What is the maximum operating frequency supported by the MAX9370EUA+?

The MAX9370EUA+ guarantees 1.0GHz operation with ≥600mV differential output swing and achieves up to 1.5GHz typical toggle frequency under standard test conditions (V_CC = 3.3V, 50Ω termination to V_CC – 2.0V). This makes the MAX9370EUA+ suitable for OC-48/STM-16 clock distribution and high-speed data path translation in telecom infrastructure.

Does the MAX9370EUA+ require external termination resistors?

Yes, the MAX9370EUA+ requires external 50Ω resistors from each differential output (Q0, Q0, Q1, Q1) to V_CC – 2.0V to establish correct LVPECL common-mode voltage and ensure specified 600mV swing and 10ps skew. The MAX9370EUA+ does not integrate termination; omission causes degraded swing, increased jitter, and timing violations.

How does the MAX9370EUA+ behave when its inputs are left unconnected?

The MAX9370EUA+ features internal pullup circuitry on D0 and D1 inputs, forcing both differential output pairs (Q0/Q0 and Q1/Q1) to a high state when inputs float. This fail-safe behavior prevents undefined logic states during power-up, hot-swap events, or signal loss-ensuring predictable MAX9370EUA+ operation in mission-critical clock systems.

Can the MAX9370EUA+ operate from a 5.0V supply?

Yes, the MAX9370EUA+ supports a full 3.0V to 5.25V supply range, making it fully compatible with 5.0V logic systems. At 5.0V, the MAX9370EUA+ delivers enhanced noise margin and maintains 1.5GHz toggle capability while adhering to absolute maximum ratings (V_CC to GND ≤ +5.5V).

What package type is used for the MAX9370EUA+?

The MAX9370EUA+ uses the 8-pin µMAX package (3mm × 3mm, 0.5mm pitch), which provides superior thermal performance (221°C/W θ_JA) compared to SOT23-8 and compact footprint advantages over SO-8-ideal for dense telecom line card designs where the MAX9370EUA+ must coexist with FPGAs and high-speed SerDes.