Overview
The MC100EL1648DT, produced by onsemi, is a 5 V ECL (Emitter-Coupled Logic) Voltage Controlled Oscillator (VCO) amplifier. This device is designed to operate within a wide frequency range and is ideal for applications requiring a local oscillator or a fixed frequency clock. It utilizes advanced bipolar process technology, enabling it to operate at extended frequency ranges. The MC100EL1648DT requires an external parallel tank circuit consisting of an inductor (L) and capacitor (C), and optionally, a varactor diode for voltage variable input.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Typical Operating Frequency | Up to 1100 MHz | MHz |
| Power Supply Current | 19 mA at 5.0 Vdc | mA |
| PECL Mode Operating Range | VCC = 4.2 V to 5.5 V with VEE = 0 V | V |
| NECL Mode Operating Range | VCC = 0 V with VEE = −4.2 V to −5.5 V | V |
| Input Capacitance | 6.0 pF (Typical) | pF |
| Operating Temperature Range | −40 to +85 °C | °C |
| Storage Temperature Range | −65 to +150 °C | °C |
| Thermal Resistance (Junction-to-Ambient) | 190 °C/W (SOIC-8 at 0 lfpm) | °C/W |
| Thermal Resistance (Junction-to-Case) | 41 to 44 °C/W (SOIC-8) | °C/W |
Key Features
- Advanced bipolar process technology for extended frequency range operation.
- On-chip termination emitter resistor (RE) with a nominal value of 510 Ω, facilitating direct ac-coupling of the output signal into a transmission line.
- No external pull-down resistor required for output dc current path.
- Output intended to drive one ECL load (3.0 pF).
- Option to use an ECL buffer for signal fanout if necessary.
- Ability to produce sine or square wave outputs based on AGC pin configuration.
- Pb-Free and RoHS compliant.
Applications
- Local oscillator in various electronic systems.
- Electronic test equipment.
- Digital high-speed telecommunications.
- Systems requiring fixed frequency clocks.
Q & A
- What is the typical operating frequency range of the MC100EL1648DT?
The MC100EL1648DT can operate up to 1100 MHz.
- What is the power supply current of the MC100EL1648DT at 5.0 Vdc?
The power supply current is 19 mA at 5.0 Vdc.
- What are the operating voltage ranges for PECL and NECL modes?
For PECL mode, VCC = 4.2 V to 5.5 V with VEE = 0 V. For NECL mode, VCC = 0 V with VEE = −4.2 V to −5.5 V.
- How is the output waveform controlled in the MC100EL1648DT?
The output waveform can be controlled to produce either a sine wave or a square wave by configuring the AGC pin.
- What is the thermal resistance of the MC100EL1648DT in SOIC-8 package?
The thermal resistance (Junction-to-Ambient) is 190 °C/W at 0 lfpm.
- Is the MC100EL1648DT Pb-Free and RoHS compliant?
- What type of external circuit is required for the MC100EL1648DT to operate?
An external parallel tank circuit consisting of an inductor (L) and capacitor (C) is required, with the option to include a varactor diode.
- Can the MC100EL1648DT be used as a crystal oscillator?
No, the MC100EL1648DT is not usable as a crystal oscillator.
- What is the recommended method for bypassing various frequencies in the MC100EL1648DT?
Bypassing should be as close to the package pins as possible to minimize unwanted lead inductance, and several different capacitors may be needed to bypass various frequencies.
- What are the typical applications of the MC100EL1648DT?
The MC100EL1648DT is typically used in local oscillator applications, electronic test equipment, and digital high-speed telecommunications.
