TV Tuner Band Selector The LA7910 is a bipolar integrated circuit (IC) designed for electronic tuning in TV and VCR applications. Below are its key specifications, descriptions, and features:
### **Manufacturer:**
The LA7910 was originally manufactured by **Sanyo Semiconductor** (now part of ON Semiconductor).
### **Specifications:**
1. **Function:** Band decoder/switching IC for electronic tuning systems.
2. **Operating Voltage:** Typically **12V** (max **14.4V**).
3. **Output Configuration:** Open-collector outputs for band switching.
4. **Number of Bands:** Supports **4-band switching** (VHF-L, VHF-H, UHF, and CATV).
5. **Input Logic:** Compatible with **binary-coded input signals** (2-bit input for band selection).
6. **Package:** Available in **SIP-9 (Single In-line Package)**.
### **Descriptions:**
- The LA7910 decodes binary input signals to select the appropriate frequency band in tuners.
- It is commonly used in analog TV tuners and VCRs for channel selection.
- The IC interfaces with a microprocessor or tuning controller to switch between bands.
### **Features:**
- **Low power consumption.**
- **High noise immunity.**
- **Built-in pull-down resistors for input pins.**
- **Open-collector outputs for direct drive of band switching circuits.**
- **Wide operating voltage range (8V–14.4V).**
For exact electrical characteristics, refer to the original **Sanyo/ON Semiconductor datasheet**.
