XO-25MHz-3.3V-CMOS
Standard crystal oscillator, 25MHz frequency, 3.3V operation, CMOS output, ±50ppm stability, 5.0x3.2mm ceramic packag...
Product Overview
Description
The XO-25MHz-3.3V-CMOS is a standard crystal oscillator providing a stable 25MHz clock output with CMOS logic levels. It operates from 3.3V supply and provides rail-to-rail square wave output compatible with standard digital logic.
This oscillator features ±50ppm total stability including temperature variation and initial tolerance. The built-in oscillator circuit ensures reliable start-up and consistent performance without external components.
Housed in a compact 5.0mm x 3.2mm ceramic SMD package, this oscillator is ideal for applications requiring a simple clock solution without the need for crystal oscillator circuit design.
Product Series
XO
Primary Application
Microcontroller clock source
Key Features
- Stable 25MHz CMOS clock output
- 3.3V operation for modern digital systems
- ±50ppm stability for general applications
- No external components required
- Fast start-up time <10ms
- Enable/disable control pin
- Compact 5.0x3.2mm ceramic package
- RoHS compliant
Specifications
| Frequency | 25.000 MHz |
|---|---|
| Frequency Stability | ±50 ppm |
| Output Type | CMOS |
| Supply Voltage | 3.3V ±10% |
| Output Voltage | 0.2V to VDD-0.2V |
| Rise/Fall Time | ≤5 ns |
| Duty Cycle | 45-55% |
| Current Consumption | ≤15 mA |
| Temperature Range | -20°C to +70°C |
| Package | 5.0 x 3.2mm SMD |
Applications
Microcontroller clock source
Industrial automation and control
FPGA/CPLD clock input
Electronic system design
Ethernet controller timing
Industrial automation and control
Industrial control systems
Industrial automation and control
Consumer electronics
Consumer electronics
Communication equipment
Communication and interface
FAE Expert Insights
"The XO-25MHz-3.3V-CMOS is my recommendation for customers who need a quick, reliable clock solution without designing an oscillator circuit. It's plug-and-play - just connect power and you have a clean 25MHz clock. I use this extensively for FPGA development boards and Ethernet applications. The ±50ppm stability is adequate for most digital applications. For customers transitioning from crystal resonators to oscillators, this is a great entry point. The 3.3V operation matches most modern MCUs and FPGAs. Power consumption is reasonable at 15mA. The enable pin is useful for power management - you can shut down the clock when not needed. Overall, an excellent general-purpose oscillator at a competitive price."
Plug-and-play 25MHz oscillator with reliable performance and easy integration
— Steven Wang, BeiLuo
Frequently Asked Questions
How do I connect this oscillator to my MCU?
Connecting XO-25MHz-3.3V-CMOS is straightforward: (1) Connect VDD pin to 3.3V supply; (2) Connect GND pin to ground; (3) Connect OUT pin to MCU clock input; (4) Add 0.1μF decoupling capacitor between VDD and GND close to oscillator; (5) Connect OE (Output Enable) to VDD or leave floating for normal operation. No other components needed. The oscillator outputs CMOS levels (0V to 3.3V) compatible with 3.3V MCUs. For 5V MCUs, verify input high voltage is compatible (typically 0.7xVDD = 3.5V for 5V MCU). Some MCUs may need level shifting. Check your MCU datasheet for clock input requirements.
Connect VDD, GND, and OUT. Add decoupling capacitor. No external oscillator circuit needed.
What is the difference between this oscillator and a crystal resonator?
Key differences between XO-25MHz oscillator and crystal resonator: (1) Active vs passive - oscillator has built-in circuit, resonator needs external oscillator; (2) Ease of use - oscillator is plug-and-play, resonator needs circuit design; (3) Power consumption - oscillator uses 15mA, resonator uses <1mA; (4) Cost - oscillator is more expensive; (5) Size - oscillator is larger (5x3.2mm vs 3.2x2.5mm crystal); (6) Stability - oscillator has guaranteed ±50ppm, resonator depends on circuit; (7) Start-up - oscillator starts in <10ms, resonator may need more time. Choose oscillator for faster development and guaranteed performance. Choose resonator for cost savings and lower power.
Choose oscillator for easy integration. Choose resonator for cost and power savings.
Can I use the output enable pin for power saving?
Yes, the OE (Output Enable) pin can be used for power management: When OE is high or floating, oscillator operates normally with clock output. When OE is low, output is disabled (high impedance or low depending on model) and current consumption is reduced. This allows you to: (1) Gate the clock when not needed; (2) Reduce power in standby modes; (3) Synchronize multiple oscillators; (4) Switch between clock sources. Power savings in disable mode varies by model - typically 30-50% reduction. Check datasheet for specific OE pin behavior. Some oscillators have ST (Standby) pin instead of OE with different functionality.
Use OE pin for clock gating and power saving. Connect to GPIO for software control.
What is the warm-up time for this oscillator?
The XO-25MHz-3.3V-CMOS has typical warm-up time of <10ms from power-on to stable output. This is much faster than OCXO which can take minutes. The warm-up time includes: (1) Power supply stabilization - microseconds; (2) Internal oscillator start-up - milliseconds; (3) Output amplitude stabilization - milliseconds. For most applications, the oscillator is ready immediately after power-on. If precise timing is needed immediately after power-up, allow 10-50ms for full stabilization. Warm-up time is specified in the datasheet and is consistent across production. Temperature has minimal effect on warm-up time for standard oscillators.
Oscillator is ready in <10ms. Allow 50ms for full stabilization if precise timing needed immediately.
Is this oscillator suitable for FPGA clock input?
Yes, XO-25MHz-3.3V-CMOS is excellent for FPGA clock input. FPGAs like Xilinx, Intel/Altera, and Lattice typically accept CMOS-level clock inputs. Key considerations: (1) Voltage level - 3.3V CMOS is compatible with 3.3V FPGAs; (2) Frequency - 25MHz is within FPGA PLL input range; (3) Jitter - standard oscillators have adequate jitter for most FPGA applications; (4) Duty cycle - 45-55% is acceptable for FPGAs. For high-speed FPGA designs (>100MHz internal), consider lower jitter oscillators or TCXO. For clocking high-speed transceivers, use dedicated reference oscillators. Check FPGA datasheet for clock input specifications. XGHC oscillators are widely used in FPGA designs.
Suitable for most FPGA applications. Check FPGA datasheet for specific clock requirements.