The common signal types are broken down into two categories: single-ended and differential logic outputs. Each category includes several types of output signals.
Single-Ended
- Sinewave and clipped sinewave
- CMOS (complementary metal oxide semiconductor)
- HCMOS (high speed CMOS)
- LVCMOS (low voltage CMOS)
- TTL (transistor-to-transistor logic)
Differential Logic
- ECL (emitter coupled logic)
- PECL (positive emitter coupled logic)
- LVPECL (low voltage PECL)
- CML (current-mode logic)
- LVDS (low voltage differential signaling)
- HCSL (high speed current steering logic)
Which Oscillator Output Signal Type Is Right for Your Needs?
Differential vs. Single Ended
- Sinewave generally offers the best phase noise, followed by CMOS, then differential.
- Higher frequencies tend to require differential signals.
- Differential signals have better rise and fall time.
- Differential signals are more resistant to common mode noise.
- Differential signals have fewer EMI concerns.
Ease of Use
- LVDS requires only a single resistor at the receiver, while LVPECL requires termination at both transmitter and receiver ends.
- LVDS
Fastest Speed
- LVDS is faster than CMOS. HCSL and LVPECL are faster but can require more power.
Lowest Power Consumption
- LVPECL is faster but consumes more power, so we recommend using CMOS or LVDS for low power consumption.
Best Jitter Performance
- You can get the best jitter performance from LVPECL, followed by LVDS, and then CMOS.
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