CD74HCT4046AMT

TEXAS INSTRUMENTS  CD74HCT4046AMT  芯片, 锁相环, 带压控振荡器, 38MHZ, SOIC-16

The is a high-speed CMOS logic Phase-locked Loop with VCO. High-speed silicon-gate CMOS device that is pin compatible with the CD4046B of the "4000B" series. They are specified in compliance with JEDEC standard number 7. The HCT4046A is 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.

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Excellent VCO frequency linearity

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VCO-inhibit control for ON/OFF keying and for low standby power consumption

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Minimal frequency drift

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Balanced Propagation Delay and Transition Times

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Significant Power Reduction Compared to LSTTL Logic ICs

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10 LSTTL Loads standard outputs and 15 LSTTL loads bus driver outputs fanout

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VIL= 0.8V maximum, VIH = 2V minimum Direct LSTTL input logic compatibility