MC74HC4046B: Phase-Locked Loop High−Performance Silicon−Gate CMOS

Description: The MC74HC4046B is similar in function to the MC14...
  • The MC74HC4046B is similar in function to the MC14046 Metal gate CMOS device. The device inputs are compatible with standard CMOS outputs; with pullup resistors, they are compatible with LSTTL outputs. The HC4046B phase−locked loop contains three phase comparators, a voltage−controlled oscillator (VCO) and unity gain op−amp DEMOUT. The comparators have two common signal inputs, COMPIN, and SIGIN. Input SIGIN and COMPIN can be used directly coupled to large voltage signals, or indirectly coupled (with a series capacitor to small voltage signals). The self−bias circuit adjusts small voltage signals in the linear region of the amplifier. Phase comparator 1 (an exclusive OR gate) provides a digital error signal PC1OUT and maintains 90 degrees phase shift at the center frequency between SIGIN and COMPIN signals (both at 50% duty cycle). Phase comparator 2 (with leading−edge sensing logic) provides digital error signals PC2OUT and PCPOUT and maintains a 0 degree phase shift between SIGIN and COMPIN signals (duty cycle is immaterial). The linear VCO produces an output signal VCOOUT whose frequency is determined by the voltage of input VCOIN signal and the capacitor and resistors connected to pins C1A, C1B, R1 and R2. The unity gain op−amp output DEMOUT with an external resistor is used where the VCOIN signal is needed but no loading can be tolerated. The inhibit input, when high, disables the VCO and all op−amps to minimize standby power consumption. Applications include FM and FSK modulation and demodulation, frequency synthesis and multiplication, frequency discrimination, tone decoding, data synchronization and conditioning, voltage−to− frequency conversion and motor speed control.
  • Features
  • Output Drive Capability: 10 LSTTL Loads
  • Low Power Consumption Characteristic of CMOS Devices
  • Operating Speeds Similar to LSTTL
  • Wide Operating Voltage Range for VCO: 3.0 to 6.0 V
  • Low Input Current: 1.0 A Maximum (except SIGIN and COMPIN)
  • In Compliance with the Requirements Defined by JEDEC Standard No. 7 A
  • Low Quiescent Current: 80 A Maximum (VCO disabled)
  • High Noise Immunity Characteristic of CMOS Devices
  • Diode Protection on All Inputs
  • Chip Complexity: 279 FETs or 70 Equivalent Gates
  • Technical Documentation & Design Resources
    Availability and Samples
    MC74HC4046BDTR2G
  • Status: Active
  • Compliance: Pb-free Halide free 
  • Description: Phase-Locked Loop High−Performance Silicon−Gate CMOS
  • Package Type: TSSOP-16
  • Package Case Outline: 948F-01
  • MSL: 1
  • Container Type: 
  • Container Qty: 
  • Specifications
  • Input Level: CMOS 
  • Output Level: CMOS 
  • fMax Typ (MHz):
  • VCC Typ (V):
  • Duty Cycle (%): 50 
  • Package Type: TSSOP-16 
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