CD4504B: Input 3.3V output 4V-10V or opposite

Roy Chou1

Part Number: CD4504B
Other Parts Discussed in Thread: CD40109B

Hi Team,

I would like to find the level shift IC which could let voltage from 3.3V to 4V-10V or 4V-10V to 3.3V (Uni- directional)

I find cd4504b may meet my requirement, but i have not used this part before. Actually it mentioned TTL ; CMOS transmission.

I'm not sure what is the CD parts limitation and difference between CD parts and SN parts.

Regards,

Roy

over 3 years ago

0 Dylan Hubbard over 3 years ago

TI__Mastermind 42600 points

Hey Roy,

That device can work (I'm assuming you are doing CMOS to CMOS so you can operate the select pin accordingly), but the CD40109B may be a better option. The CD4000 family is our high voltage family and the 'CD' indicates that it was acquired from Harris.

0 Roy Chou1 over 3 years ago in reply to Dylan Hubbard

TI__Genius 12505 points

Hi Dylan,

Thank you for your comments. Do we have reference circuit of CD40109B?

Roy

0 Dylan Hubbard over 3 years ago in reply to Roy Chou1

TI__Mastermind 42600 points

Hey Roy,

Not for this specific device, but it's a simple level translation device. Connect Vcc, Vdd, and GND and make sure to terminate any inputs that won't be used.

0 Roy Chou1 over 3 years ago in reply to Dylan Hubbard

TI__Genius 12505 points

Hi Dylan,

Excuse me, could you let me know the meaning of "make sure to terminate any inputs" connect to GND or floating?

Roy

0 Emrys Maier over 3 years ago in reply to Roy Chou1

TI__Guru* 96591 points

Hi Roy,

Any unused channels of a CMOS device should be terminated at GND or VCC. We have an FAQ that explains the effects of leaving an input floating: [FAQ] How does a slow or floating input affect a CMOS device?

0 Roy Chou1 over 3 years ago in reply to Emrys Maier

TI__Genius 12505 points

Hi Emrys,

Thank you. Could you let me know the Band Width of this part?

Roy

0 Emrys Maier over 3 years ago in reply to Roy Chou1

TI__Guru* 96591 points

Hi Roy,

At 4 V operation, I probably wouldn't try to push it past ~5 MHz. You can probably get more speed out of the device, but you might run into trouble across process, voltage, and temperature variations.

Logic

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CD4504B: Input 3.3V output 4V-10V or opposite