CMOS and TTL Logic Interface

CMOS outputs are compatible with TTL inputs, so you can use any CMOS device running at 5 V.

For translating 3.3 V to 5 V, you can use any unidirectional LV1T/LV4T shifter. But 3.3 V is also the high-level voltage of TTL signals, so you can also use any 5 V buffer with TTL-compatible inputs.

A high capacitance at an output initially looks like a short. To limit the output current, use a series resistor. For example, for a 25 mA limit at 5 V, add 200 Ω.

What exactly does "CMOS high capacitance" mean? Typical CMOS inputs have a very low capacitance. Do you want to use the translator to drive a MOSFET gate?

Hi Balakrishna,

Clemens has touched on all the points perfectly. My question is the same. I'm not exactly sure what you are meaning by: 

CMOS High Capacitance (3000pF) as Load

CMOS Low Capacitance (200pF) as Load

Dear Sir 

These  are the Load Characteristic parameters 

CMOS High Capacitance (3000pF) as Load Characteristic 

CMOS Low Capacitance (200pF) as Load Characteristic 

and can i use single AXC family  voltage Translator for interfacing Both CMOS and TTL

please suggest as earliest as Possible

Thank you in advance

regards

Balakrishna J

AXC devices do not run at 5 V.

Dear Sir 

These  are the Load Characteristic parameters 

CMOS High Capacitance (3000pF) as Load Characteristic 

CMOS Low Capacitance (200pF) as Load Characteristic 

to Drive above Load which buffers do i need prefer 

please suggest as earliest as Possible

Thank you in advance

regards

Balakrishna J

Dear sir

Can I use for Same TTL/CMOS Application

These Buffers

1) SN74LVC8t245 (Direction Controlled)

2) TXS0108 (Auto Direction)

If TXS0108 not recommended as per above quires i will continue with SN74LVC8t245 but I would like to prefer auto bidirectional transceivers for my design

please suggest as earliest as Possible

Thank you in advance

regards

Balakrishna J