CD4053B: Need your help in selecting correct analog/digital multiplexer for my application.

Krunal Zala

Prodigy 50 points

Part Number: CD4053B
Other Parts Discussed in Thread: TMUX1574, TMUX4053, , TMUX1309, SN74CB3Q3245, TMUX1511

Tool/software:

Hello,

I need your help in selecting correct analog/digital multiplexer for my application.

I have a TI MCU running at 1.8V supply and therefore all digital IOs will be working at 1.8V logic.

I have following signals in my design:

As you can see in above block diagram, I have two different interface signals named as InterfaceA & InterfaceB. This means, signal will always go from Interface to Target(Left To Right)

All signals follow 1.8V digital logic.

The maximum clock frequency on any signal could go as high as 10MHz. I can reduce to 4Mhz as well.

I don’t need signal isolation. So, the GND of Left side circuit and Right-side circuit is common.

I have TI MCU that will control which interface to be selected. So, the multiplexer will be controlled by TI MCU.

CLK1 & CLK2 are always unidirectional and driven from either InterfaceA or InterfaceB. This means, signal will always go from Left to Right

D0, D1, D2 & D3 signals are bidirectional. This means, signal may go from Left to Right or Right to Left

LATCH is always unidirectional and driven from Target device. This means, signal will always go from Right to Left

What I need is a multiplexer that allows me to select the desired Interface between InterfaceA OR Interface B.

The multiplexer should not introduce excessive voltage drop on 1.8V logic. Therefore, ON resistance shall be as low as possible

The multiplexer should not alter signal integrity which results into violation of 1.8V digital logic VIL, VIH, VOH, VOL specification.

I don’t think crosstalk will be matter of concern as my max. frequency is less than 10MHz

Having said that, could you please help me in narrowing down which TI product would be most appropriate for above mentioned requirement?

7 months ago

+1 Clemens Ladisch 7 months ago

Guru 302560 points

Here is a list of suitable switches: ti.com/switches-multiplexers/analog/products.html#480=4;6;10&1143=2:1 SPDT&2192=1.8-V compatible control inputs&3306=1.8

You probably want 2× TMUX1574.

+1 Nir Gilgur 7 months ago

TI__Genius 12995 points

Hello Krunal,

I agree with Clemens suggestion.

Using 2 TMUX1574 should fit your application. It is a 2:1 4-channel mux so two of them will cover all the signals in your system. It is 1.8V logic compatible with an Ron of 2 ohms.

Thanks,

Nir

0 Krunal Zala 7 months ago in reply to Clemens Ladisch

Prodigy 50 points

Thank you for your help and support.

0 Krunal Zala 7 months ago in reply to Nir Gilgur

Prodigy 50 points

Hello Nir,

Need your expert view on below query.

I happen to see https://www.ti.com/product/TMUX4053

Can you please help me on how I can compare TMUX4053 with the one you proposed TMUX1574?

Is there a side by side comparison tool on TI Website?

Both TMUX4053 and TMUX1574 supports bidirectional analog signal. Isn't it?

I am just trying to technically understand what differences are between TMUX4053 and TMUX1574?

Regards,

0 Clemens Ladisch 7 months ago in reply to Krunal Zala

Guru 302560 points

The TMUX4053 is optimized for higher voltages.

0 Krunal Zala 7 months ago in reply to Clemens Ladisch

Prodigy 50 points

Thank you for your reply.

Is there a tool on TI website that allows side by side comparison?

0 Clemens Ladisch 7 months ago in reply to Krunal Zala

Guru 302560 points

In the product search, show all the columns you want, select the devices with the checkbox in the left column, and click "Compare".

0 Rami Mooti1 7 months ago in reply to Krunal Zala

TI__Mastermind 30503 points

Like Clemens mentioned here, you can use the product search tool
https://www.ti.com/switches-multiplexers/analog/products.html

From there you can check the little boxes next to the names of the devices (You can search for specific names by pressing the little sliding bars below "Product Number" since you already know the numbers you're interested in)

From there you'll automatically get a comparison pop up at the bottom. Press compare to get the table

For example, I went ahead and through the CD4053B, TMUX1574 and TMUX4053B all in the same table for you here:

https://www.ti.com/compare-products/?id=520&type=GPT&partList=TMUX4053,TMUX1574,CD4053B&columnList=-2,1143,480,3306,3307,1389,3143typ,3127typ,3193max,192typ,1611,1192,2954,2955,1130,261011,2192,-4,0max

You can choose to highlight only the differences or show all the parameters using the table.

Hope this helps!

Thanks,
Rami

0 Krunal Zala 7 months ago in reply to Rami Mooti1

Prodigy 50 points

Hello,

I have additional query on TMUX1574DYYR

Referring to electrical specification, I see I can connect 3.3V to VDD but S1A, S1B, S2A, S2B, S3A, S3B, S4A, S4B can have signal(analog or digital) with amplitude in the range of GND to VDD of TMUX1574DYYR(in my case that's 3.3V)

Do you endorse my understanding?

Regards,

0 Nir Gilgur 7 months ago in reply to Krunal Zala

TI__Genius 12995 points

Hello Krunal,

Please see recommended operation conditions below:

The VDD signal range of the TMUX1574 is 1.5 to 5.5V, while the Vs/Vd is 0 to VDD x 2. Meaning the signal on the I/O pins can go up to x2 the power voltage.

In your case, if VDD = 3.3V. S1A, S1B, S2A, S2B, S3A, S3B, S4A, S4B can have a signal range from 0 to 6.6V.

Thanks,

Nir

0 Krunal Zala 7 months ago in reply to Nir Gilgur

Prodigy 50 points

Hello,

I need additional help and information on this topic.

The requirements have evolved and I need your help in selecting appropriate analog MUX.

I have attached a document showing my requirement.

I have 4 sources and one target
Source S1, S2, S3 are similar but not necessarily identical
Source S4 has additional signal compared to S1, S2, S3
As long as propagation delay is uniform across all signals in the given group of signals, it is acceptable, although, smaller propagation delay is preferred
Target should not receive altered signals. In other words, for Target, mux shall behave as a transparent block and therefore Target would believe it is receiving signal directly from Source S1 or S2 or S3 or S4
Break before make is desired

The help I need from you is in selecting appropriate analog mux.

At any point of time, Target is connected to either S1 Or S2, Or S3 or S4

More than one source must be active at any point of time

Could you please help me in selecting appropriate mux to satisfy above mentioned requirements?

If TI does not have one mux IC that satisfies above mentioned requirements then please let me know what the best solutions available?

0 Clemens Ladisch 7 months ago in reply to Krunal Zala

Guru 302560 points

For the 4:1 mux, 2× TMUX1309.

For the additional five signals, you can use any 1:1 switch like the SN74CB3Q3245 or 2× TMUX1511.

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CD4053B: Need your help in selecting correct analog/digital multiplexer for my application.