CD74HC4046AMT

Overview

The CD74HC4046AMT is a high-speed CMOS logic phase-locked loop (PLL) integrated circuit manufactured by Texas Instruments. It features a single PLL circuit with an integrated voltage-controlled oscillator (VCO). The device operates within a supply voltage range of 2 V to 6 V and supports a maximum frequency of 38 MHz. It is housed in a 16-TSSOP surface-mount package with a width of 4.4 mm and a height of 1.2 mm. The component functions across an extended industrial temperature range from -55°C to +125°C, ensuring reliable performance in demanding environments.

Feature Summary

• Integrates a linear voltage-controlled oscillator (VCO) utilizing linear operational amplifier technology for improved linearity.
• Includes three distinct phase comparers (PC1, PC2, and PC3), each equipped with dedicated signal and comparer inputs.
• Features a self-biasing input circuit designed to maintain small voltage signals within the linear region of the input amplifier.

Applications

• Frequency synthesis circuits
• Motor speed control systems
• FM modulation and demodulation

Procurement Notes

Verify the specific suffix 'MT' against the manufacturer's official documentation to confirm the tape-and-reel packaging configuration and quantity per reel. Ensure the ordering part number matches the exact pinout and electrical specifications required for the target design. Cross-reference the datasheet revision history to validate current manufacturing status and any potential form-fit-function changes.

Selection Notes

Select this component when a single-channel PLL solution with multiple phase comparison options is required. The wide operating voltage range of 2 V to 6 V provides flexibility for various logic families. The TSSOP-16 package is suitable for space-constrained printed circuit board layouts requiring surface-mount assembly techniques.

Part Context

This device belongs to the CD74HC4046A series, which consists of high-speed silicon-gate CMOS logic devices. These components are pin-compatible with the older CD4046B series, facilitating direct upgrades or replacements in existing designs while offering improved switching speeds and lower power consumption characteristics typical of HC logic families.

Replacement Considerations

Compatible alternatives include the CD74HC4046AE (PDIP package) and CD74HC4046APWR (TSSOP package). Verify that substitute packages match the physical footprint and thermal requirements of the original design before implementation.