Overview
The CD74HC4046APWRG4, produced by Texas Instruments, is a high-speed silicon-gate CMOS phase-locked loop (PLL) device. It is part of the HC4046A series, which is pin compatible with the CD4046B of the '4000B' series. This device is specified in compliance with JEDEC standard number 7 and is 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, providing flexibility in various signal processing tasks. It operates over a wide temperature range of -55°C to 125°C, making it suitable for diverse environmental conditions.
Key Specifications
| Parameter | Description | Value |
|---|---|---|
| Operating Frequency Range | Typical at VCC = 5V | Up to 18MHz |
| Minimum Center Frequency | At VCC = 4.5V | 12MHz |
| Operating Power Supply Voltage Range | VCO Section | 3V to 6V |
| Operating Power Supply Voltage Range | Digital Section | 2V to 6V |
| Package Type | TSSOP | 16 Pins |
| Operating Temperature Range | -55°C to 125°C | |
| Fanout (Over Temperature Range) | Standard Outputs | 10 LSTTL Loads |
| Fanout (Over Temperature Range) | Bus Driver Outputs | 15 LSTTL Loads |
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.
- Wide operating temperature range: -55°C to 125°C.
- Balanced propagation delay and transition times.
- Significant power reduction compared to LSTTL logic ICs.
- High noise immunity: NIL = 30%, NIH = 30% of VCC at VCC = 5V.
- CMOS input compatibility with low input current (IL ≤ 1µA at VOL, VOH).
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 CD74HC4046APWRG4 used for?
The CD74HC4046APWRG4 is a phase-locked loop (PLL) device used for various applications such as FM modulation and demodulation, frequency synthesis, tone decoding, and motor-speed control.
- What is the operating frequency range of the CD74HC4046APWRG4?
The device operates up to 18MHz at VCC = 5V and has a minimum center frequency of 12MHz at VCC = 4.5V.
- What types of phase comparators are available on the CD74HC4046APWRG4?
The device includes three phase comparators: EXCLUSIVE-OR, Edge-Triggered JK Flip-Flop, and Edge-Triggered RS Flip-Flop.
- What is the operating power supply voltage range for the VCO section?
The VCO section operates within a voltage range of 3V to 6V.
- What is the operating temperature range of the CD74HC4046APWRG4?
The device operates over a temperature range of -55°C to 125°C.
- What is the fanout capability of the CD74HC4046APWRG4?
The device can drive up to 10 LSTTL loads for standard outputs and up to 15 LSTTL loads for bus driver outputs.
- How does the CD74HC4046APWRG4 achieve excellent VCO frequency linearity?
The device achieves excellent VCO frequency linearity through the use of linear op-amp techniques.
- What is the purpose of the VCO-Inhibit control on the CD74HC4046APWRG4?
The VCO-Inhibit control is used for ON/OFF keying and to reduce standby power consumption.
- What are the noise immunity characteristics of the CD74HC4046APWRG4?
The device has high noise immunity with NIL = 30% and NIH = 30% of VCC at VCC = 5V.
- Is the CD74HC4046APWRG4 sensitive to electrostatic discharge?
Yes, the device is sensitive to electrostatic discharge, and users should follow proper IC handling procedures.
