器件名称:
CD54HC4046A
功能描述:
High-Speed CMOS Logic Phase-Locked Loop with VCO
文件大小:
443.56KB 共28页
简 介:
CD54HC4046A, CD74HC4046A, CD54HCT4046A, CD74HCT4046A Data sheet acquired from Harris Semiconductor SCHS204J February 1998 - Revised December 2003 High-Speed CMOS Logic Phase-Locked Loop with VCO Description The ’HC4046A and ’HCT4046A are high-speed silicon-gate CMOS devices that are pin compatible with the CD4046B of the “4000B” series. They are specified in compliance with JEDEC standard number 7. The ’HC4046A and ’HCT4046A are phase-locked-loop circuits that contain a linear voltage-controlled oscillator (VCO) and three different phase comparators (PC1, PC2 and PC3). A signal input and a comparator input are common to each comparator. The signal input can be directly coupled to large voltage signals, or indirectly coupled (with a series capacitor) to small voltage signals. A self-bias input circuit keeps small voltage signals within the linear region of the input amplifiers. With a passive low-pass filter, the 4046A forms a second-order loop PLL. The excellent VCO linearity is achieved by the use of linear op-amp techniques. Features [ /Title (CD74 HC404 6A, CD74 HCT40 46A) /Subject (HighSpeed CMOS Operating Frequency Range - Up to 18MHz (Typ) at VCC = 5V - Minimum Center Frequency of 12MHz at VCC = 4.5V Choice of Three Phase Comparators - EXCLUSIVE-OR - Edge-Triggered JK Flip-Flop - Edge-Triggered RS Flip-Flop Excellent VCO Frequency Linearity VCO-Inhibit Control for ON/OFF Keying and for Low Standby Power Consumption Minimal Frequency Drift Operating Power Supply……
