器件名称: LC72121
功能描述: PLL Frequency Synthesizers for Electronic Tuning
文件大小: 379.55KB 共22页
简 介:Ordering number : EN*5815A
CMOS IC
LC72121, 72121M, 72121V
PLL Frequency Synthesizers for Electronic Tuning
Preliminary Overview
The LC72121 and the LC72121M and the LC72121V are high input sensitivity (20 mVrms at 130 MHz) PLL frequency synthesizers for 3 V systems. These ICs are serial data (CCB) compatible with the LC72131, and feature the improved input sensitivity and lower spurious radiation (provided by a redesigned ground system) required in high-performance AM/FM tuners. I/O ports — Output-only ports: 4 pins — I/O ports: 2 pins — Supports the output of a clock time base signal. Operating ranges — Supply voltage: 2.7 to 3.6 V — Operating temperature: – 40 to 85°C Package — DIP22S, MFP24S, SSOP24 Comparison with the LC72131/M — Serial data compatible (CCB) — Identical pin functions — Two VSS pins were added. — The DIP version is pin compatible (VSS pins were inserted as the DIP22S NC pins.) — The MFP product provides a modified pin assignment (The MFP20 package was replaced by an MFP24 package, and extra VSS pins were added.) — The SSOP24 is a newly developed package that has the same pin assignment as the MFP24S product.
Functions
High-speed programmable divider — FMIN: 10 to 160 MHz ... Pulse swallower technique (With built-in divide-by-2 prescaler) — AMIN: 2 to 40 MHz ... Pulse swallower technique 0.5 to 10 MHz ... Direct division technique IF counter — IFIN: 0.4 to 12 MHz ... For AM and FM IF counting Reference frequency — One of 12 reference frequencies ……
