Timer circuit The **UPC1555G2-E1** is a **PLL (Phase-Locked Loop) frequency synthesizer IC** manufactured by **NEC Electronics (now part of Renesas Electronics)**. Below are its key specifications, descriptions, and features:
### **Specifications:**
- **Manufacturer:** NEC (NEC Electronics)
- **Type:** PLL Frequency Synthesizer IC
- **Package:** SOP (Small Outline Package)
- **Operating Voltage:** Typically **5V** (exact range may vary)
- **Frequency Range:** Designed for **VHF/UHF applications** (exact range depends on external components)
- **Phase Noise Performance:** Optimized for low phase noise in frequency synthesis
- **Lock Time:** Fast lock time for stable frequency generation
### **Descriptions:**
- The **UPC1555G2-E1** is a **monolithic integrated circuit** designed for **frequency synthesis** in communication systems.
- It is commonly used in **radio transceivers, wireless communication devices, and signal generators**.
- The IC integrates a **phase comparator, voltage-controlled oscillator (VCO), and divider logic** for precise frequency control.
### **Features:**
1. **PLL-Based Frequency Synthesis** – Enables stable and accurate frequency generation.
2. **Low Phase Noise** – Suitable for high-performance RF applications.
3. **Wide Operating Voltage** – Compatible with standard **5V** systems.
4. **Compact SOP Package** – Space-efficient for PCB designs.
5. **Fast Lock Time** – Ensures quick frequency stabilization.
6. **Compatible with External VCOs** – Can be used with external oscillators for extended frequency ranges.
This IC is primarily used in **professional and industrial RF equipment** where precise frequency control is required. For exact electrical characteristics, refer to the **official NEC datasheet (now Renesas documentation)**.
