BS2p24 Input Threshold
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Posts: 46,084
What is the minimum input voltage level
for a BS2p24 that will be read as a logical true(1)?
Tom Fisher
Dallas,TX
for a BS2p24 that will be read as a logical true(1)?
Tom Fisher
Dallas,TX
Comments
-- Jon Williams
-- Applications Engineer, Parallax
-- Dallas Office
Original Message
From: TBooneFisher [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=pc909AdIEFEzfxbrY64WSXqsWX7BmB8VSawASr532G2HUi1BTxlHpDMB8I18iDODFhIO0X4oD8SX-dzr280]tboonefisher@s...[/url
Sent: Saturday, June 19, 2004 9:44 PM
To: basicstamps@yahoogroups.com
Subject: [noparse][[/noparse]basicstamps] BS2p24 Input Threshold
What is the minimum input voltage level
for a BS2p24 that will be read as a logical true(1)?
Tom Fisher
Dallas,TX
wrote:
> What is the minimum input voltage level
> for a BS2p24 that will be read as a logical true(1)?
> Tom Fisher
> Dallas,TX
hi tom,
i couldn't find any info directly from parallax, but standard
high-level input voltages are:
CMOS - 0.7 x Vcc (about 3.5 volts for a 5V supply)
TTL - 2V
i'd assume that it would be a CMOS product (so about 3.5 volts), but
you should run a couple of experiments to validate this.
have fun.
-mike
volts. Our current help file specifies 1.5 volts in a couple places --
this is being corrected now.
-- Jon Williams
-- Applications Engineer, Parallax
-- Dallas Office
Original Message
From: tangent1900 [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=pL_KN42lN8s9BtpDgWuh9iRsmIPX251CWLVLaaNiikV4aXCmJPSpZk6WTfIft3M7F2ZTUA7U2wVX-4ACIhLJzg]mcarnes@l...[/url
Sent: Wednesday, June 23, 2004 12:41 PM
To: basicstamps@yahoogroups.com
Subject: [noparse][[/noparse]basicstamps] Re: BS2p24 Input Threshold
--- In basicstamps@yahoogroups.com, "TBooneFisher" <tboonefisher@s...>
wrote:
> What is the minimum input voltage level
> for a BS2p24 that will be read as a logical true(1)?
> Tom Fisher
> Dallas,TX
hi tom,
i couldn't find any info directly from parallax, but standard high-level
input voltages are: CMOS - 0.7 x Vcc (about 3.5 volts for a 5V supply)
TTL - 2V
i'd assume that it would be a CMOS product (so about 3.5 volts), but you
should run a couple of experiments to validate this.
have fun.
-mike
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> high-level input voltages are:
> CMOS - 0.7 x Vcc (about 3.5 volts for a 5V supply)
> TTL - 2V
>
Thanks. I found it by RTFM! It's 1.5V and is discussed in
the section documenting the RCTIME function.
Tom Fisher
Dallas,TX
printed documenation.
-- Jon Williams
-- Applications Engineer, Parallax
-- Dallas Office
Original Message
From: TBooneFisher [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=GWMFm_jwu2ATjoZMg4ecu3NW4VNzRRw0VDqCzkrmiJIPQfVf-fkRxx6jGa7kOtYxRTAqxXLo2AWn6QaAXCOEIfmY]tboonefisher@s...[/url
Sent: Wednesday, June 23, 2004 6:32 PM
To: basicstamps@yahoogroups.com
Subject: Re: [noparse][[/noparse]basicstamps] Re: BS2p24 Input Threshold
> i couldn't find any info directly from parallax, but standard
> high-level input voltages are: CMOS - 0.7 x Vcc (about 3.5 volts for a
> 5V supply) TTL - 2V
>
Thanks. I found it by RTFM! It's 1.5V and is discussed in
the section documenting the RCTIME function.
Tom Fisher
Dallas,TX
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