MSP430 Interface

sandhya sarode

Other Parts Discussed in Thread: SN74LVC16245A, SN74LVC3G34

I have a custom design ASIC with LVTTL interface. I want to use the MSP 430 to configure & monitor ASIC as well for data . there are several in/out signals to be interface with uC. suggest the proper buffers for :

signals from uC to ASIC (12)

Signals from ASIC to uC (6)

ASIC will operate @+3.3 VCC

over 8 years ago

0 ShreyasRao over 8 years ago

TI__Guru 61770 points

Hi Sandhya ,

welcome to e2e !
There are buffers and transceivers which could be used. I would think 16bit transceiver sn74lvc16245A can be considered and I have filtered from the parametric search a few more options for direction controlled transceivers.
Else , you could also consider to use a total of 6 of the standard 3bit sn74lvc3G34 for unidirectional buffering without additional direction control required.
www.ti.com/.../compare

0 Clemens Ladisch over 8 years ago

Guru 316440 points

Why do you think you need buffering? Doesn't the MSP run at 3.3 V, too?

0 sandhya sarode over 8 years ago in reply to ShreyasRao

Prodigy 20 points

Thanks, i had considered sn74lvc16244 initially. but my question is ASIC has a LVTTL so should i consider CMOS to LVTTL interface for uC to ASIC signal flow (controller should drive LVTTL ). ASIC is also operating at 3.3V so level conversion is not required. i have to check only driving capacity

0 Clemens Ladisch over 8 years ago in reply to sandhya sarode

Guru 316440 points

The MSP's CMOS I/Os and LVTTL I/Os are compatible, i.e., they can be connected directly.

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MSP430 Interface