MC74HC4046ADG

MC74HC4046ADG is a high‑speed CMOS phase‑locked loop (PLL) with an internal voltage‑controlled oscillator (VCO). It provides the essential PLL blocks: a phase detector that compares a reference input (IN) to the VCO feedback, a loop filter path (external RC) that converts phase error to a control voltage, and a VCO whose frequency is controlled by the VC input. When the loop is in lock, the VCO frequency tracks the reference (within the loop’s range) and is set by the R–C network and supply. The 74HC family offers CMOS compatibility, low power, and operation typically from 2 to 6 V. The ADG suffix denotes Automotive Grade with extended temperature range.
Common uses: FM demodulation, clock recovery, simple frequency synthesis, tone detection, and other PLL-based oscillators.
External components required: an RC network for the VCO, loop-filter components, and a feedback path from the VCO output back to the phase detector. Check the TI datasheet for exact pinout, voltage ranges, and allowable VCO frequencies.

Equivalent parts (cross references) include:
- TI SN74HC4046A (and SN74HCT4046A)
- TI CD4046BE / CD4046UB
- Motorola MC14046BCP
- Toshiba TC4046UB / TC4046BE
- NXP HEF4046B (and HCF4046 variants)
These are CMOS 4000-series or 74HC/74HCT equivalents of the MC74HC4046ADG ( PLL/VCO). Check voltage, package, and pinout for compatibility.

MC74HC4046ADG features (concise):
- CMOS phase-locked loop (PLL) with on-chip voltage-controlled oscillator (VCO).
- External RC network sets VCO frequency; loop filter external as needed.
- Phase detector for reference and feedback signals.
- 2 V to 6 V supply range (HC technology); low static power.
- Automotive-grade option available (ADG suffix) with extended temp range.
- Available in standard 14-pin packages (DIP/SOIC) and related forms.
- Wide operating range of VCO/PLL frequencies dictated by external components.
- Suitable for applications such as frequency synthesis, clock recovery/demodulation, and servo/PLL-based control loops.
Note: Exact pinout and required external components depend on the chosen package and application.

- Pin count: 14 pins (DIP or SOIC-14 package).
- Function: CMOS phase-locked loop (PLL) with a voltage-controlled oscillator (VCO). It provides a phase detector and VCO; an external loop filter/feedback sets the VCO frequency to lock to a reference signal, for applications like FM demodulation, frequency synthesis, and timing.

- Manufacturer: Motorola (historical origin). Today, its MC74HC4046A parts are produced under NXP Semiconductors (Freescale’s successor, after the 2015 merger).
- What kind of company: Motorola was a multinational electronics and telecommunications equipment company; NXP Semiconductors is a Dutch multinational that designs and manufactures semiconductors for embedded systems.

The MC74HC4046ADG is a CMOS phase-locked loop (PLL) with a voltage-controlled oscillator (VCO). Typical applications include:
- Frequency synthesis, clock generation, and timing circuits
- FM/FSK demodulation and tone detection
- Phase-locked servo loops for motor control and robotics
- VCO source for function generators and test equipment
- Demodulation/modulation hardware in communications systems

14-pin surface-mount IC in an SOIC (small-outline) package; RoHS-compliant lead-free version.