74HCT9046A - Philips

74HCT9046A PLL with bandgap controlled VCO

The 74HCT9046A is a high-speed Si-gate CMOS device. It is specified in compliance with “JEDEC standard no. 7A”. • Tone decoding • Data synchronization and conditioning • Voltage-to-frequency conversion • Motor-speed control. QUICK REFERENCE DATA GND = 0 V; Tamb = 25 °C; tr = tf ≤ 6 ns. SYMBOL fc PARAMETER VCO centre frequency CONDITIONS C1 = 40 pF; R1 = 3 .

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
• Op.