SN74HCT04: SN74HCT04

Elamurugan Palanisamy

Part Number: SN74HCT04
Other Parts Discussed in Thread: LM393, TLC339, LM339, TLC374, TLV1704, TLC354, LM311

Hi Team.,

I have tested the below drive circuit, but its consuming more current if i give VCC to GND an Gnd to 5v. But if I connect VCCto 5V, GND to gnd, then my inverter is working fine. But in simulation it was working fine. Kindly help on this.

over 2 years ago

0 Clemens Ladisch over 2 years ago

Guru 273560 points

Yes, this circuit consumes more current.

Just use a comparator with an open-collector output like the LM393.

0 Elamurugan Palanisamy over 2 years ago in reply to Clemens Ladisch

Prodigy 90 points

Actually my design is if I get 5V input, output should be -5 and for 0 Volt input, output should be 0. But I need 48 channels with less space. could you suggest some circuit for LM393.

0 Clemens Ladisch over 2 years ago in reply to Elamurugan Palanisamy

Guru 273560 points

Power the comparators from −5 V and 5 V (or something higher). Connect the input signals to the inverting comparator inputs, and a reference voltage of about 2.5 V to the noninverting inputs. Connect the pull-up resistors at the outputs to GND.

Use quad comparators like the LM339. For lower power consumption, use CMOS devices like the TLC339/TLC374/TLC354/TLV1704.

0 Albert Xu1 over 2 years ago in reply to Elamurugan Palanisamy

TI__Mastermind 24435 points

Hi Elamurugan,

If you are wanting to start looking towards comparators, I will reassign this to the team responsible for that. They will be able to help you with any part/circuit recommendations.

Best,
Albert

0 Chi Nguyen1 over 2 years ago

TI__Genius 11701 points

Thank you, Clemens and Albert, for your inputs.

Elamurugan,

Here is a circuit, which Clemens also suggested, where you can use the TLV1704 (rail to rail so your input can swing 0 to 5V on a +5V/-5V supply).

What speed and power do you need? If you need more speed, you can also use LM311 which directly allows you to have a ground referenced output with split supply on the input.

driverckTLV1701.TSC

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SN74HCT04: SN74HCT04