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

FEATURES
• Low power consumption
• Centre frequency up to 17 MHz (typ.) at VCC = 5.5 V
• Choice of two phase comparators(1):
   – EXCLUSIVE-OR (PC1)
   – Edge-triggered JK flip-flop (PC2)
• No dead zone of PC2
• Charge pump output on PC2, whose current is set by an external resistor Rb
• Centre frequency tolerance ±10%
• Excellent voltage-controlled-oscillator (VCO) linearity
• Low frequency drift with supply voltage and temperature variations
• On chip bandgap reference
• Glitch free operation of VCO, even at very low frequencies
• Inhibit control for ON/OFF keying and for low standby power consumption
• Operation power supply voltage range 4.5 to 5.5 V
• Zero voltage offset due to op-amp buffering
• Output capability: standard
• ICC category: MSI.

APPLICATIONS
• FM modulation and demodulation where a small centre 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.