CD74HC4046AEG4 Texas Instruments Integrated Circuit (Dual-In-Line Packages) In Stock
CD74HC4046AEG4 is a high-speed CMOS phase-locked loop (PLL) with voltage-controlled oscillator (VCO) by Texas Instruments, housed in a 16-pin DIP package for frequency synthesis and clock recovery applications. Key specs: PLL with VCO, three phase comparators, wide frequency range. Available in stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Dual-In-Line Packages
- Pin Count
- 16
- Lifecycle
- ACTIVE
- Datasheet
- CD74HC4046AEG4 Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Phase-locked loop (PLL) with integrated voltage-controlled oscillator (VCO) in a single IC
- Three independent phase comparators (PC1, PC2, PC3) for flexible PLL loop filter design
- Wide VCO frequency range programmable by external resistor and capacitor network
- HC CMOS logic family for operation from 2V to 6V supply with low power consumption
- 16-pin DIP package suitable for prototyping and through-hole circuit board assembly
Applications
The CD74HC4046AEG4 is widely used in frequency synthesis, clock recovery, FM demodulation, and motor speed control applications where a stable phase-locked output frequency is required. It is a fundamental building block in microcontroller clock multipliers, jitter-reduced signal recovery circuits, and FSK/PSK demodulators in communications and industrial control systems.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for CD74HC4046AEG4:
Frequently Asked Questions
What are the three phase comparators in the CD74HC4046AEG4 and when should each be used?
The CD74HC4046AEG4 includes three phase comparators: PC1 is an XOR-based comparator with a 90° phase offset at lock; PC2 is an edge-triggered phase-frequency detector that acquires lock quickly and holds lock at zero phase offset; PC3 is a negative-edge-triggered variant of PC2. PC2 is most commonly used for general PLL applications due to its large capture range and zero static phase error.
What supply voltage range does the CD74HC4046AEG4 support?
The CD74HC4046AEG4 operates from a supply voltage range of 2V to 6V, consistent with the HC CMOS logic family specification. This wide supply range allows use in 3.3V and 5V digital systems, making it compatible with both modern microcontroller logic levels and classic 5V TTL-compatible environments.
How is the VCO frequency range set in the CD74HC4046AEG4?
The VCO center frequency and operating range of the CD74HC4046AEG4 are programmed using external passive components: a resistor R1 connected to the VCO in/out pin sets the minimum frequency, a resistor R2 sets the maximum frequency, and a capacitor C1 determines the VCO tuning sensitivity. This RC network provides flexible frequency programming from a few Hz to several MHz.
What are typical applications for the CD74HC4046AEG4?
Typical applications include clock multiplication for microprocessors, carrier recovery in FSK/PSK digital communication receivers, FM demodulation, motor speed feedback control, and frequency-shift keying encoders. The CD74HC4046AEG4 is also used as a low-jitter clock synchronizer in data acquisition systems and as a general-purpose frequency synthesizer when combined with a programmable divider.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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