Philips 74HC4046A
The 74HC/HCT4046A are high-speed Si-gate CMOS devices and are pin compatible with the “4046” of the “4000B” series. They are specified in compliance with JEDEC standard no. The 74HC/HCT4046A are phase-locked-loop circuits that comprise a linear voltage-controlled oscillator (VCO) and three different phase comparators (PC1, PC2 and PC3) with a common signal input amplifier and a common comparator input.| Part No. | 74HC4046A |
|---|---|
| Datasheet | 74HC4046A Download |
| Manufacturer |  Philips |
| Description | Phase-locked-loop |
| Buy | Stock & Price |
FEATURES
● Low power consumption● Centre frequency of up to 17 MHz (typ.) at VCC = 4.5 V
● Choice of three phase comparators: EXCLUSIVE-OR; edge-triggered JK flip-flop; edge-triggered RS flip-flop
● Excellent VCO frequency linearity
● VCO-inhibit control for ON/OFF keying and for low standby power consumption
● Minimal frequency drift
● Operating power supply voltage range: VCO section 3.0 to 6.0 V digital section 2.0 to 6.0 V
● Zero voltage offset due to op-amp buffering
● Output capability: standard
● ICC category: MSI.
GENERAL DESCRIPTION
7A. 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. The VCO requires one external capacitor C1 (between C1A and C1B) and one external resistor R1 (between R1 and GND) or two external resistors R1 and R2 (between R1 and GND, and R2 and GND).
