Analog Devices Inc./Maxim Integrated MAX7375AXR485+T

Overview

MAX7375AXR485+T from Maxim Integrated is a factory-trimmed 4.85MHz silicon oscillator in SC70-3 package, delivering rail-to-rail 50% duty cycle square-wave output with ±2% initial accuracy and ±50ppm/°C temperature drift. It replaces ceramic resonators and crystal oscillators in microcontroller and UART clocking for 3V/3.3V/5V systems, offering vibration immunity and low EMI susceptibility in white goods and industrial controls.

For engineers reviewing the MAX7375AXR485+T datasheet, MAX7375AXR485+T pinout, MAX7375AXR485+T application, or MAX7375AXR485+T equivalent, key selection criteria include its 4.85MHz factory-set frequency, 5µs startup time, 2.7V–5.5V supply range, ±10mA drive capability, and SC70-3 footprint compatibility with space-constrained embedded timing designs.

Technical Context

The MAX7375AXR485+T uses a direct-generation oscillator architecture-no PLL-ensuring deterministic jitter behavior (160ps_P-P at 8MHz, scaled proportionally) and stable startup within 5µs. Its push-pull CMOS output drives 1kΩ to GND or 500Ω to V+, eliminating external load capacitance or bias components.

Operating across -40°C to +125°C, it maintains 45–57% duty cycle and exhibits <±325ppm/°C max frequency drift over temperature. Supply current scales with both frequency and V+ (e.g., 1.7–4.2mA at 4.85MHz, V+=2.7–5.5V), and output rise/fall times are 5ns/2.5ns respectively.

Key Specifications

Pinout & Package

Supplied in a 3-pin SC70-3 surface-mount package (land pattern 90-0208, package code X3-2), the MAX7375AXR485+T features minimal board area (1.25mm × 0.85mm × 0.9mm) and RoHS-compliant construction.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar silicon oscillator applications.

Compared with SiT1533AI-H4-33E-4.850000G and ABM3B-4.850MHZ-D2Y-T, the MAX7375AXR485+T delivers superior drive capability (±10mA vs. ±4mA), wider supply range (2.7–5.5V), and proven vibration immunity-making it optimal for ruggedized, high-reliability embedded timing where layout simplicity and environmental resilience are critical.

Availability

MAX7375AXR485+T is available at Aetrix Electronics and suitable for smart appliance control panels, industrial UART communication modules, and portable medical monitoring devices requiring stable component supply, long-term lifecycle support, and consistent factory-trimmed frequency performance.

Supply support for MAX7375AXR485+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, designs precision analog, mixed-signal, and power management ICs for industrial, automotive, and computing applications.

The MAX7375AXR485+T belongs to Maxim's silicon oscillator product line, engineered to replace quartz and ceramic timing elements with robust, integrated, drop-in alternatives for microcontroller and UART clocking in harsh environments.

FAQ

What is the factory-trimmed frequency of the MAX7375AXR485+T?

The MAX7375AXR485+T is factory-trimmed to 4.85MHz with ±2% initial accuracy at +25°C and V+=3.0V. This frequency is fixed and non-adjustable-no external components or programming are required to set or maintain it. The MAX7375AXR485+T achieves this using a fully integrated silicon oscillator core, eliminating reliance on external crystals or resonators.

Does the MAX7375AXR485+T require external load capacitors or biasing resistors?

No, the MAX7375AXR485+T requires no external components. Its push-pull CMOS output drives microcontroller clock inputs directly, and its internal oscillator circuit is self-contained. When retrofitting a crystal-based design, all external capacitors and feedback resistors must be removed to avoid instability or incorrect startup behavior of the MAX7375AXR485+T.

What is the operating temperature range guaranteed for the MAX7375AXR485+T?

The MAX7375AXR485+T is production-tested and guaranteed over -40°C to +125°C. While characterization confirms functional operation up to +135°C, full specification compliance-including initial accuracy, duty cycle, and supply current-is assured only within the -40°C to +125°C range. Applications exceeding +125°C require factory consultation.

How does the MAX7375AXR485+T compare to quartz crystal oscillators in vibration-prone environments?

The MAX7375AXR485+T uses monolithic silicon oscillator technology, making it inherently immune to mechanical vibration and shock-unlike quartz crystals, which exhibit frequency shifts and potential failure under sustained agitation. This makes the MAX7375AXR485+T ideal for white goods, motor controls, and handheld tools where crystal-based timing would degrade or fail.

What is the maximum capacitive load the MAX7375AXR485+T can drive reliably?

The MAX7375AXR485+T is characterized with CL = 10pF, 50pF, and 100pF loads, showing clean 5ns/2.5ns edges and stable duty cycle across all. While not explicitly rated for >100pF, its ±10mA drive strength supports moderate capacitive loading; for >100pF, a local bypass capacitor ≥1000× the load capacitance is recommended to maintain power-supply rejection and edge fidelity.