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Analog Devices Inc./Maxim Integrated MAX7375AXR345
- Part No.:
- MAX7375AXR345
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Oscillators
- Package:
- -
- Datasheet:
-
MAX7375AXR345.pdf
- Description:
- MAX7375 3-PIN SILICON OSCILLATOR
- Quantity:
- Payment:
- Shipping:
Inventory:1,772
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Product details
Overview
MAX7375AXR345 from Maxim Integrated is a factory-trimmed 3.45MHz silicon oscillator in SC70-3 package, designed as a drop-in replacement for ceramic resonators and crystals in microcontroller and UART clocking applications operating from 2.7V to 5.5V. It delivers rail-to-rail 50% duty cycle square-wave output with ±2% initial accuracy, ±50ppm/°C temp drift, and 5µs startup time.
For engineers reviewing the MAX7375AXR345 datasheet, MAX7375AXR345 pinout, MAX7375AXR345 application, or MAX7375AXR345 equivalent, key selection criteria include factory-set frequency stability, vibration/EMI immunity, push-pull CMOS drive capability, and compatibility with wide-temperature industrial control systems.
Technical Context
The MAX7375AXR345 uses a direct silicon oscillator architecture-no PLL, no external capacitors-generating 3.45MHz with guaranteed ±2% initial accuracy at +25°C and ±50ppm/°C temperature coefficient over -40°C to +125°C. Its push-pull output drives 1kΩ to GND or 500Ω to V+ within 300mV of rails.
Startup occurs in ≤5µs after V+ exceeds 1.65V; output jitter is 160psP-P (measured at 8MHz, scaled per period), rise/fall times are 5ns/2.5ns, and duty cycle remains tightly controlled (45–57%) across voltage and temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Frequency | 3.45MHz - factory-trimmed, no calibration required; replaces crystal/resonator in fixed-frequency clocking. |
| Initial Accuracy | ±2% at +25°C - eliminates need for post-solder trimming or system-level frequency calibration. |
| Temp Drift | ±50ppm/°C - ensures stable timing across automotive (-40°C to +125°C) and appliance environments. |
| Supply Range | 2.7V to 5.5V - supports 3V, 3.3V, and 5V microcontroller systems without level-shifting. |
| Output Drive | ±10mA - directly drives CMOS clock inputs; no buffer needed for µC/UART interfaces. |
| Startup Time | 5µs - enables fast system wake-up and synchronizes with power-on reset timing. |
| Duty Cycle | 45%–57% - maintains robust edge timing for synchronous logic sampling. |
| Jitter (8MHz ref) | 160psP-P - low phase noise preserves timing margin in high-speed digital interfaces. |
Pinout & Package
MAX7375AXR345 is housed in a 3-pin SC70-3 surface-mount package (1.25mm × 0.85mm × 0.55mm), optimized for space-constrained PCB layouts in portable and automotive modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V+ | Positive supply input | Accepts 2.7V–5.5V; requires local 0.1µF ceramic decoupling to GND for PSRR integrity. |
| CLOCK | Push-pull CMOS output | Directly drives µC/UART clock input; no load capacitance or bias resistors required. |
| GND | Ground reference | Low-impedance return path; must be connected to system ground plane for EMI immunity. |
Key Features
| Feature | Design Value |
|---|---|
| No external components | Eliminates load caps, feedback resistors, and crystal matching networks-reduces BOM count and layout complexity. |
| Rail-to-rail output | Ensures full logic swing across supply range, guaranteeing reliable clock detection by CMOS inputs. |
| Vibration/EMI immunity | Monolithic silicon design avoids piezoelectric sensitivity-ideal for motor-driven appliances and vehicle ECUs. |
| Fast 5µs startup | Enables immediate clock availability after power ramp, reducing boot latency in battery-powered devices. |
| -40°C to +125°C operation | Qualified across full industrial/automotive temperature range-no derating or thermal compensation needed. |
Applications
| Home Appliance Control | Automotive Body Controller |
|---|---|
|
Use Scenario: Clock source for MCU in washing machine mainboard exposed to vibration, humidity, and thermal cycling. IC Role / Device Role / Timing Role: Primary system clock generator replacing ceramic resonator subject to mechanical shock failure. Use Value: Eliminates resonator cracking and frequency shift under drum spin vibration; maintains ±2% timing accuracy across -20°C to +85°C cabinet ambient. |
Use Scenario: Timing reference for door module MCU in passenger compartment, operating near HVAC motors and RF sources. IC Role / Device Role / Timing Role: EMI-hardened clock source for LIN bus communication and sensor polling. Use Value: Immune to conducted EMI from blower motors; sustains 3.45MHz clock integrity without added shielding or filtering. |
| Industrial HMI Panel | Portable Medical Monitor |
|
Use Scenario: Clock for ARM Cortex-M4-based display controller in factory-floor HMI with wide ambient temperature swings. IC Role / Device Role / Timing Role: Stable timing reference enabling precise touch response sampling and serial interface synchronization. Use Value: ±50ppm/°C drift ensures <100ppm total error over -40°C to +85°C-within UART baud rate tolerance for RS-485 comms. |
Use Scenario: Low-power clock for patient monitor MCU during battery-operated standby and active modes. IC Role / Device Role / Timing Role: Ultra-fast-start oscillator enabling rapid wake-from-sleep for vital sign acquisition. Use Value: 5µs startup allows immediate ADC sampling upon wake event; 2.7V min supply supports brownout operation down to single-cell Li-ion. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar silicon oscillator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SiT1533AI-H4-33E-3.450000M | MEMS oscillator; ±10ppm initial accuracy; 1.62–3.63V supply; 1.5µs startup. | Higher accuracy and lower voltage support; smaller 1.5mm × 1.0mm DFN package. | Preferred when sub-10ppm stability or ultra-low-voltage operation is required; not pin-compatible with MAX7375AXR345. |
| ABM3B-3.450MHZ-D2Y-T | 3.45MHz ceramic resonator; ±0.5% accuracy; requires external load caps and inverter circuit. | Lower cost but needs 2× 22pF caps and gate bias; susceptible to board flex and moisture. | Only suitable for cost-sensitive, non-vibrating, indoor applications where layout area and reliability are secondary. |
Compared with SiT1533AI-H4-33E-3.450000M and ABM3B-3.450MHZ-D2Y-T, the MAX7375AXR345 offers best-in-class EMI/vibration resilience and zero-component integration at moderate accuracy-making it optimal for ruggedized industrial and automotive clocking where layout simplicity and field reliability outweigh ultra-tight ppm specs.
Availability
MAX7375AXR345 is available at Aetrix Electronics and suitable for home appliance control, automotive body electronics, and industrial HMI applications requiring stable component supply, long-term lifecycle support, and consistent factory-trimmed frequency performance.
Supply support for MAX7375AXR345 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 MAX7375AXR345 belongs to Maxim's silicon oscillator product line, engineered to replace fragile quartz and ceramic timing elements with monolithic, EMI-immune, zero-bill-of-materials clock sources for harsh-environment microcontroller systems.
FAQ
What is the exact factory-trimmed frequency of the MAX7375AXR345?
The MAX7375AXR345 is trimmed to precisely 3.45MHz at +25°C, with ±2% initial accuracy guaranteed across the full 2.7V–5.5V supply range. This value is laser-trimmed during wafer test and does not require user adjustment or external components to maintain.
Is the MAX7375AXR345 pin-compatible with other MAX7375 variants like MAX7375AXR405?
Yes-the MAX7375AXR345 shares identical SC70-3 pinout (V+, CLOCK, GND) and electrical interface with all MAX7375A_XR series parts. Frequency is the only difference; no PCB or firmware changes are needed when swapping between standard-frequency variants.
Does the MAX7375AXR345 require external load capacitors or bias resistors?
No-MAX7375AXR345 is a fully integrated oscillator with no external components required. Unlike crystals or ceramic resonators, it contains internal gain and frequency-setting circuitry, eliminating load capacitors, feedback resistors, and matching networks.
Can the MAX7375AXR345 operate reliably in automotive under-hood environments?
Yes-MAX7375AXR345 is qualified for -40°C to +125°C operation and exhibits high immunity to mechanical vibration and EMI, making it suitable for engine control modules, body controllers, and infotainment systems where quartz oscillators may fail due to shock or noise.
What is the maximum capacitive load the MAX7375AXR345 can drive on its CLOCK output?
The MAX7375AXR345 CLOCK pin is specified to drive up to 100pF while maintaining 5ns rise time and 45–57% duty cycle. For loads >50pF, Maxim recommends increasing the local V+/GND bypass capacitor to ≥1000× the output load capacitance to preserve signal integrity.
MAX7375AXR345 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Base Resonator:
- -
- Type:
- -
- Frequency:
- -
- Function:
- -
- Output:
- -
- Voltage - Supply:
- -
- Frequency Stability:
- -
- Absolute Pull Range (APR):
- -
- Operating Temperature:
- -
- Spread Spectrum Bandwidth:
- -
- Current - Supply (Max):
- -
- Ratings:
- -
- Mounting Type:
- -
- Supplier Device Package:
- 4-VDFN (3.2x2.5)
- Size / Dimension:
- -
- Height - Seated (Max):
- -
MAX7375AXR345 FAQ
1.How can I place an order for MAX7375AXR345 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX7375AXR345 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MAX7375AXR345 reliable?
The price and inventory of MAX7375AXR345 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX7375AXR345 is usually 5 days.
3.What payment methods are accepted for MAX7375AXR345?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX7375AXR345 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX7375AXR345?
MAX7375AXR345 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX7375AXR345 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MAX7375AXR345?
For technical support, including MAX7375AXR345 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX7375AXR345 requirements.
6.How does Aetrix verify that MAX7375AXR345 is sourced from the original manufacturer or authorized distributors?
All MAX7375AXR345 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MAX7375AXR345 meets industry standards.
7.What is the process for return or replacement of MAX7375AXR345?
All MAX7375AXR345 units undergo pre-shipment inspection (PSI). If there is an issue with MAX7375AXR345, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MAX7375AXR345 part is unused and in its original packaging.
Return procedure for MAX7375AXR345:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX7375AXR345 Tags
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Raltron Electronics
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