General description

The 74HCT9046A is a high-speed Si-gate CMOS device. It is specified in compliance with JEDEC standard no 7A.

特性 Features

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

■ Low power consumption

■ 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

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