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Analog Devices Inc./Maxim Integrated MAX7394ATTLY+
- Part No.:
- MAX7394ATTLY+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Oscillators
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
MAX7394ATTLY+.pdf
- Description:
- MEMS OSC XO 922.0000 KHZ SMD
- Quantity:
- Payment:
- Shipping:
Inventory:2,390
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Product details
Overview
MAX7394ATTLY+ from Maxim Integrated is a precision silicon oscillator with enable control, replacing quartz crystals and ceramic resonators in +2.4V to +3.6V systems. It delivers factory-set 922kHz output with ±0.25% total accuracy (0°C to +85°C, TDFN package), 5ns rise/fall time, and operates across -40°C to +125°C - ideal for USB timing and microcontroller clocking in space-constrained industrial designs.
For engineers reviewing the MAX7394ATTLY+ datasheet, MAX7394ATTLY+ pinout, MAX7394ATTLY+ application, or MAX7394ATTLY+ equivalent, key selection factors include its enable-controlled startup behavior, dual-supply architecture (VCC/VCC2), rail-to-rail push-pull CLOCK output, and guaranteed frequency stability over temperature and supply voltage variation.
Technical Context
The MAX7394ATTLY+ implements a temperature-compensated BiCMOS oscillator core with manual enable logic, where ENABLE high enables oscillation and low forces shutdown with weak pull-up on CLOCK. Its dual-supply design isolates oscillator core (VCC) from output driver (VCC2), improving noise immunity and load drive capability.
Unlike crystal-based solutions, it requires no external load capacitors or biasing components. The 6-pin TDFN package integrates internal compensation, eliminating aging drift and mechanical sensitivity while maintaining compatibility with standard microcontroller clock inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Frequency | 922kHz - factory-trimmed, no calibration required at board level |
| Total Accuracy (0°C to +85°C) | ±0.25% - meets USB full-speed timing tolerance without margining |
| Supply Voltage Range | +2.4V to +3.6V - matches modern low-voltage MCU I/O domains |
| Output Rise/Fall Time | 5ns - ensures clean edge integrity into 10pF loads without overshoot |
| Duty Cycle | 40%–60% - supports balanced clock distribution in synchronous logic |
| Startup Time | 2ms - enables fast system wake-up from low-power states |
| Shutdown Current | <2µA - reduces power in sleep modes without external switch |
Pinout & Package
MAX7394ATTLY+ uses a 6-pin 3mm × 3mm TDFN package with exposed pad (EP), RoHS-compliant and lead-free. Pin 1 = VCC (core supply), Pin 2 = GND, Pin 3 = I.C. (internally connected to GND), Pin 4 = ENABLE (active-high enable input), Pin 5 = CLOCK (rail-to-rail CMOS push-pull output), Pin 6 = VCC2 (output driver supply). EP must be soldered to ground for thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (Pin 1) | Oscillator core supply | Power source for internal TCXO circuitry; bypass with 0.1µF capacitor to GND |
| GND (Pin 2) | Reference ground | Common return path for core and output stages; connects to EP |
| I.C. (Pin 3) | Internally connected node | Mandatory connection to GND; floating or miswiring causes functional failure |
| ENABLE (Pin 4) | Enable control input | Logic-high enables oscillator; logic-low disables and pulls CLOCK weakly high via 10kΩ |
| CLOCK (Pin 5) | CMOS clock output | Rail-to-rail push-pull output capable of driving 1kΩ to GND or 500Ω to VCC2 |
| VCC2 (Pin 6) | Output driver supply | Independent supply for CLOCK output stage; decouple separately with 0.1µF |
Key Features
| Feature | Design Value |
|---|---|
| Factory-set 922kHz frequency | Eliminates need for external tuning components or post-silicon calibration |
| Enable-controlled startup/shutdown | Enables deterministic power sequencing and low-power state management |
| Dual independent supplies (VCC/VCC2) | Decouples oscillator core noise from output driver, improving EMI robustness |
| No external load capacitance required | Reduces BOM count and PCB area vs. crystal-based solutions |
| Resistant to humidity and vibration | Validated for use in automotive under-hood and industrial motor-control environments |
Applications
| USB Full-Speed Timing | Industrial Microcontroller Clocking |
|---|---|
Use Scenario: Providing precise 922kHz reference for USB full-speed (12MHz) PLLs in embedded host controllers. IC Role / Device Role / Timing Role: Primary system clock source replacing ceramic resonator in USB peripheral ICs. Use Value: ±0.25% accuracy ensures compliance with USB 2.0 full-speed timing budget without derating. | Use Scenario: Clocking ARM Cortex-M0/M3 microcontrollers in programmable logic controllers (PLCs). IC Role / Device Role / Timing Role: System clock generator enabling deterministic real-time task scheduling. Use Value: -40°C to +125°C operation guarantees timing stability across industrial ambient extremes. |
| White Goods Control Timing | Handheld Product Sleep/Wake Coordination |
Use Scenario: Synchronizing motor control and sensor sampling in washing machine main control boards. IC Role / Device Role / Timing Role: Low-power timing source for MCU during standby and active cycles. Use Value: <2µA shutdown current extends battery backup life in EEPROM-critical applications. | Use Scenario: Enabling fast wake-up from deep sleep in portable medical monitors. IC Role / Device Role / Timing Role: Enable-gated clock source synchronized with system power rails. Use Value: 2ms startup time allows sub-10ms resume from hibernation without clock stabilization delay. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision oscillator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX7394ATTMG+ | 1MHz factory frequency; identical package, pinout, and enable interface | Used where higher base frequency needed for integer PLL multiplication to 48MHz/96MHz | Select when system clock tree requires 1MHz reference instead of 922kHz |
| Si501-A-922KHZ | Same 922kHz output, ±50ppm (±0.005%) accuracy, 2.5V–3.6V supply, 4-pin SOT23 | Lacks ENABLE pin; auto-start only; smaller footprint but no shutdown control | Choose for cost-sensitive, always-on applications where enable control is unnecessary |
Compared with MAX7394ATTLY+, MAX7394ATTMG+ offers identical functionality at 1MHz for PLL-friendly systems, while Si501-A-922KHZ trades enable control for tighter accuracy and smaller size - making MAX7394ATTLY+ optimal where deterministic power gating and 922kHz are mandatory.
Availability
MAX7394ATTLY+ is available at Aetrix Electronics and suitable for USB timing, industrial microcontroller clocking, and white goods control applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX7394ATTLY+ 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 high-performance analog and mixed-signal semiconductor solutions for industrial, communications, and consumer markets.
The MAX7393/MAX7394 family targets replacement of mechanical timing components with silicon-based oscillators offering superior shock/vibration immunity, faster startup, and simplified layout - specifically for space-constrained, thermally demanding embedded systems.
FAQ
What is the operating supply voltage range for MAX7394ATTLY+?
The MAX7394ATTLY+ operates from +2.4V to +3.6V on both VCC (Pin 1) and VCC2 (Pin 6). These supplies must be tied together externally or sourced from the same regulator. Operation outside this range risks permanent damage or undefined behavior, per Absolute Maximum Ratings. The MAX7394ATTLY+ is not rated for 5V operation.
Does MAX7394ATTLY+ require external load capacitors like quartz crystals?
No, the MAX7394ATTLY+ does not require external load capacitors. Its integrated temperature-compensated oscillator eliminates the need for crystal load matching networks. This simplifies PCB layout, reduces BOM count, and avoids frequency shift due to stray capacitance - a key advantage over traditional crystal oscillators.
What happens to the CLOCK output when ENABLE is driven low on MAX7394ATTLY+?
When ENABLE is driven low, the MAX7394ATTLY+ enters shutdown mode: the internal oscillator stops, and the CLOCK output (Pin 5) is weakly pulled high through an internal 10kΩ resistor to VCC2. This state draws less than 2µA total supply current and avoids floating outputs that could cause downstream logic glitches.
Is the MAX7394ATTLY+ pin-compatible with MAX7393 variants?
No, MAX7394ATTLY+ is not pin-compatible with MAX7393 variants. While both use 6-pin TDFN packages, MAX7393 has CLKIN (Pin 4) for auto-enable functionality, whereas MAX7394ATTLY+ uses ENABLE (Pin 4). Swapping them without board revision will result in nonfunctional clock output or incorrect enable behavior.
What is the guaranteed frequency accuracy of MAX7394ATTLY+ over its full temperature range?
The MAX7394ATTLY+ guarantees ±1.0% total frequency accuracy over -40°C to +125°C (TDFN package). This includes initial tolerance, temperature drift, supply voltage variation, and aging - all tested and specified per Maxim's production characterization, ensuring reliable timing in automotive and industrial environments.
MAX7394ATTLY+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- MAX7394
- Package/Case:
- 6-WDFN Exposed Pad
- Packaging:
- Bulk
- Product Status:
- Active
- Base Resonator:
- MEMS
- Type:
- XO (Standard)
- Frequency:
- 922 kHz
- Function:
- Enable/Disable
- Output:
- -
- Voltage - Supply:
- 2.4V ~ 3.6V
- Frequency Stability:
- -
- Absolute Pull Range (APR):
- -
- Operating Temperature:
- -40°C ~ 125°C
- Spread Spectrum Bandwidth:
- -
- Current - Supply (Max):
- 4.4mA
- Ratings:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 4-VDFN (3.2x2.5)
- Size / Dimension:
- 0.118" L x 0.118" W (3.00mm x 3.00mm)
- Height - Seated (Max):
- 0.031" (0.80mm)
MAX7394ATTLY+ FAQ
1.How can I place an order for MAX7394ATTLY+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX7394ATTLY+ 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 MAX7394ATTLY+ reliable?
The price and inventory of MAX7394ATTLY+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX7394ATTLY+ is usually 5 days.
3.What payment methods are accepted for MAX7394ATTLY+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX7394ATTLY+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX7394ATTLY+?
MAX7394ATTLY+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX7394ATTLY+ 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 MAX7394ATTLY+?
For technical support, including MAX7394ATTLY+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX7394ATTLY+ requirements.
6.How does Aetrix verify that MAX7394ATTLY+ is sourced from the original manufacturer or authorized distributors?
All MAX7394ATTLY+ 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 MAX7394ATTLY+ meets industry standards.
7.What is the process for return or replacement of MAX7394ATTLY+?
All MAX7394ATTLY+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX7394ATTLY+, 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 MAX7394ATTLY+ part is unused and in its original packaging.
Return procedure for MAX7394ATTLY+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX7394ATTLY+ Tags
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