sim900d logic 5v compatability

[haxan7]

Can sim900d tolerate 5v logic levels? Its datasheet says that the supply voltage should be between 3.2 and 4.8V.
I want to interface sim900d with my arduino running at 5v. If i connect the gsm module and arduino directly would the 5v logic signals by arduino damage my gsm module. If it's safe what voltage should i run my gsm module at?

 

[S.P.S]

I think you can't use 5v TTL with sim900d.I havn't used the specific modem

 

[tommy_ele]

I think you should do the level matching with triode first, or at lease serial a resistor between them

 

[anirudha3]

You can use 4.2V LDO between the external supply and the GSM modem....Other wise you can design resistor divider network

vo= (R2/R1+R2) * Vin