1. General description

The 74HCT9046A. This device features reduced input threshold levels to allow interfacing to TTL

logic levels. Inputs also include clamp diodes, this enables the use of current limiting resistors to

interface inputs to voltages in excess of VCC.

2. Features and benefits

• Operation power supply voltage range from 4.5 V to 5.5 V

• Low power consumption

• Complies with JEDEC standard no. 7A

• Inhibit control for ON/OFF keying and for low standby power consumption

• Center frequency up to 17 MHz (typical) at VCC = 5.5 V

• Choice of two phase comparators:

• PC1: EXCLUSIVE-OR

• PC2: Edge-triggered JK flip-flop

• No dead zone of PC2

• Charge pump output on PC2, whose current is set by an external resistor Rbias

• Center frequency tolerance ±10

• Excellent Voltage Controlled Oscillator (VCO) linearity

• Low frequency drift with supply voltage and temperature variations

• On-chip band gap reference

• Glitch free operation of VCO, even at very low frequencies

• Zero voltage offset due to operational amplifier buffering

• ESD protection:

• HBM JESD22-A114F exceeds 2000 V

• MM JESD22-A115-A exceeds 200 V

3. Applications

• FM modulation and demodulation where a small center frequency tolerance is essential

• Frequency synthesis and multiplication where a low jitter is required (e.g. video

picture-in-picture)

• Frequency discrimination

• Tone decoding

• Data synchronization and conditioning

• Voltage-to-frequency conversion

• Motor-speed control

74HCT9046A属于集成电路（IC） > 时钟发生器，PLL，频率合成器。安世半导体(中国)有限公司制造生产的74HCT9046A时钟发生器，PLL，频率合成器时钟发生器、PLL 和频率合成器集成电路 (IC) 可为逻辑器件提供参考信号的稳定定时脉冲，这些器件包括计算机、微控制器、数据通信系统和图形/视频发生器。这些集成电路可能包括缓冲器、驱动器、分频器、倍频器、多路复用器、合成器、扇出分配器和预分频器。