Overview
The CD74HC4046APWRE4 is a high-speed silicon-gate CMOS phase-locked loop (PLL) circuit produced by Texas Instruments. It is part of the HC4046A and HCT4046A series, which are pin compatible with the CD4046B of the '4000B' series. These devices are specified in compliance with JEDEC standard number 7 and are designed for a wide range of applications requiring precise frequency control and synchronization.
The device includes a linear voltage-controlled oscillator (VCO) and three different phase comparators (PC1, PC2, and PC3), allowing for flexible configuration in various PLL applications. The VCO exhibits excellent frequency linearity, achieved through the use of linear op-amp techniques. The CD74HC4046APWRE4 is available in a 16-pin TSSOP package and operates over a wide temperature range of -55°C to 125°C.
Key Specifications
| Parameter | Description | Value |
|---|---|---|
| Operating Frequency Range | At VCC = 5V | Up to 18MHz (Typ) |
| Minimum Center Frequency | At VCC = 4.5V | 12MHz (Typ) |
| Power Supply Voltage Range | VCO Section | 3V to 6V |
| Digital Section | 2V to 6V | |
| Operating Temperature Range | -55°C to 125°C | |
| Package Type | 16-pin TSSOP | |
| Fanout (Over Temperature Range) | Standard Outputs | 10 LSTTL Loads |
| Bus Driver Outputs | 15 LSTTL Loads | |
| High-Level Input Voltage (VIH) | HC Types at VCC = 5V | 4.5V (Max) |
| Low-Level Input Voltage (VIL) | HC Types at VCC = 5V | 0.8V (Max) |
Key Features
- Choice of three phase comparators: EXCLUSIVE-OR, Edge-Triggered JK Flip-Flop, and Edge-Triggered RS Flip-Flop.
- Excellent VCO frequency linearity achieved through linear op-amp techniques.
- VCO-Inhibit control for ON/OFF keying and low standby power consumption.
- Minimal frequency drift.
- Significant power reduction compared to LSTTL logic ICs.
- High noise immunity: NIL = 30%, NIH = 30% of VCC at VCC = 5V for HC types.
- Direct LSTTL input logic compatibility for HCT types: VIL = 0.8V (Max), VIH = 2V (Min).
- CMOS input compatibility: Il ≤ 1µA at VOL, VOH.
- Balanced propagation delay and transition times.
- Wide operating temperature range: -55°C to 125°C.
Applications
- FM Modulation and Demodulation
- Frequency Synthesis and Multiplication
- Frequency Discrimination
- Tone Decoding
- Data Synchronization and Conditioning
- Voltage-to-Frequency Conversion
- Motor-Speed Control
Q & A
- What is the CD74HC4046APWRE4?
The CD74HC4046APWRE4 is a high-speed silicon-gate CMOS phase-locked loop (PLL) circuit produced by Texas Instruments.
- What are the key components of the CD74HC4046APWRE4?
The device includes a linear voltage-controlled oscillator (VCO) and three different phase comparators (PC1, PC2, and PC3).
- What is the operating frequency range of the CD74HC4046APWRE4?
The operating frequency range is up to 18MHz (Typ) at VCC = 5V and a minimum center frequency of 12MHz at VCC = 4.5V.
- What is the power supply voltage range for the VCO and digital sections?
The VCO section operates from 3V to 6V, and the digital section operates from 2V to 6V.
- What are the types of phase comparators available in the CD74HC4046APWRE4?
The device offers three phase comparators: EXCLUSIVE-OR, Edge-Triggered JK Flip-Flop, and Edge-Triggered RS Flip-Flop.
- What is the significance of the VCO-Inhibit control?
The VCO-Inhibit control is used for ON/OFF keying and to reduce standby power consumption.
- What are the key applications of the CD74HC4046APWRE4?
Applications include FM Modulation and Demodulation, Frequency Synthesis and Multiplication, Frequency Discrimination, Tone Decoding, Data Synchronization and Conditioning, Voltage-to-Frequency Conversion, and Motor-Speed Control.
- What is the operating temperature range of the CD74HC4046APWRE4?
The device operates over a wide temperature range of -55°C to 125°C.
- What is the package type of the CD74HC4046APWRE4?
The device is available in a 16-pin TSSOP package.
- How does the CD74HC4046APWRE4 achieve excellent VCO frequency linearity?
The excellent VCO frequency linearity is achieved through the use of linear op-amp techniques.
