CD74HCT7046A: CD74HCT7046A and CD74HCT4046A difference

Carlo

Part Number: CD74HCT7046A
Other Parts Discussed in Thread: CD74HCT4046A,

Hi E2E,

What is the difference between CD74HCT7046A and CD74HCT4046A? Which is the most suitable device to lock a 1 kHz square wave?Is there a PLL integrated circuit with a sinusoidal waveform VCO output

Regards,
Carlo

over 3 years ago

0 Michael J Schultis over 3 years ago

TI__Mastermind 24805 points

Hello Carlo,

The two devices have different types of phase comparators.

The 7046 has a XOR or an JK-FF style comparator, while the 4046 has XOR, JK-FF, or RS-FF styles of phase comparators.

I believe either device would be capable of locking to a 1kHz square wave. There are typical center frequency curves in each of the datasheets that show what R and C values should be used to set the center locking frequency and 1kHz is well within range of either device.

Michael

0 Carlo over 3 years ago in reply to Michael J Schultis

TI__Expert 7715 points

Hello Michael,
Regarding the other question. Is there a PLL integrated circuit with a sinusoidal waveform VCO output? Thank you

Regards,
Carlo

0 Michael J Schultis over 3 years ago in reply to Carlo

TI__Mastermind 24805 points

Carlo,

My apologies for overlooking the second part of the question.

All of the devices we have under Digital timing ICs | Products | Specialty logic ICs | TI.com are digital and do not have analog or sine wave outputs.

Michael

Logic

Logic forum

CD74HCT7046A: CD74HCT7046A and CD74HCT4046A difference