SN74LVC3G17: 10 MHz TTL transmitter and receiver IC

Danilo A.

Mastermind 26410 points

Part Number: SN74LVC3G17
Other Parts Discussed in Thread: SN74LVC1G17

Hi Team,

This inquiry is related to the other E2E thread below.

e2e.ti.com/.../10-mhz-ttl-transmitter-and-receiver-ic

According to our customer,

If I was going to use the 74LVC3G17 for transmit and receive along with using coax as a transmission medium, what data rates could I expect to get? Assume the signal is 50 ohm terminated at the receiver.

To drive the 50 ohm termination, I would have to gang several outputs together. They would always be the same level so there would not be contention.

Regards,

Danilo

over 1 year ago

0 Clemens Ladisch over 1 year ago

Guru 275410 points

A 50 Ω termination has nothing to do with TTL.

Please specify the electrical characteristics of the receiver, especially its V_IL/V_IH.

0 Danilo A. over 1 year ago in reply to Clemens Ladisch

TI__Mastermind 26410 points

Hi Clemens,

Thank you for your response. The 74LVC3G17 will be use as transmitter as well as receiver in the customer's application. Our customer would like to know the data rates if he will use 74LVC3G17 for both transmitter and receiver.

Regards,

Danilo

0 Clemens Ladisch over 1 year ago in reply to Danilo A.

Guru 275410 points

There are several different ways to terminate a transmission line; see pages 1-27…29 of the LVC Designer's Guide. The simplest way is a series resistor at the transmitter, which allows to use a single-channel gate (SN74LVC1G17), but you can choose another one if it fits your circumstances.

LVC supports 175 MHz at 3.3 V. Some termination techniques might reduce this.

0 Danilo A. over 1 year ago in reply to Clemens Ladisch

TI__Mastermind 26410 points

Hi Clemens,

Please see our customer's feedback below.

Is it okay to gang the IO of the LVC device together to give higher drive capability. The question about increasing the drive strength wasn't answered.

Regards,

Danilo

0 Clemens Ladisch over 1 year ago in reply to Danilo A.

Guru 275410 points

Yes, this is allowed. See [FAQ] Can I connect two outputs from a CMOS logic device together directly?

0 Danilo A. over 1 year ago in reply to Clemens Ladisch

TI__Mastermind 26410 points

Hi Clemens,

Thank you very much for your help!

Regards,

Danilo

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SN74LVC3G17: 10 MHz TTL transmitter and receiver IC