Path: ...!Xl.tags.giganews.com!local-2.nntp.ord.giganews.com!nntp.supernews.com!news.supernews.com.POSTED!not-for-mail
NNTP-Posting-Date: Fri, 17 May 2024 19:01:42 +0000
From: John Larkin <jjSNIPlarkin@highNONOlandtechnology.com>
Newsgroups: sci.electronics.design
Subject: Re: ac138
Date: Fri, 17 May 2024 11:59:47 -0700
Organization: Highland Tech
Reply-To: xx@yy.com
Message-ID: <fr9f4jtdqtoge7jivttb7h0kd5om1dio4k@4ax.com>
References: <v27sad$fuo$1@reader1.panix.com> <v285sd$2a7cm$1@dont-email.me>
X-Newsreader: Forte Agent 3.1/32.783
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
Lines: 32
X-Trace: sv3-atg4CiGRrjYyHmeDG91VyOgFedb6yUiYkdt8su18v42SoQmOtsA0NBahDUQYVZ/Dh0DlDydLn1yuj3q!Aor1GtfleHlcZrZ1u/f66gHfXQoi/oDgcsvop9VMnHoxoQUf5jMOr7O5iO8Ac8/XDJzU+xgZvPfG!q9Xoqw==
X-Complaints-To: www.supernews.com/docs/abuse.html
X-DMCA-Complaints-To: www.supernews.com/docs/dmca.html
X-Abuse-and-DMCA-Info: Please be sure to forward a copy of ALL headers
X-Abuse-and-DMCA-Info: Otherwise we will be unable to process your complaint properly
X-Postfilter: 1.3.40
Bytes: 2323

On Fri, 17 May 2024 10:58:28 -0700, Don Y
<blockedofcourse@foo.invalid> wrote:

>On 5/17/2024 8:15 AM, Hul Tytus wrote:
>> Anyone know of an ic similar to the hc/ac138/238 (16 pin,
>> 1 input to 8 output multiplexer) but with outputs of the
>> open collector/drain style that can handle 2 amps at
>> 12 volts?
>
>The '138 is a decoder (demultiplexer).  What you are looking
>for is more likely considered a hammer driver.  The two
>functions tend not to coexist; if you wanted a low-side
>driver that could handle 8 loads, you would likely be looking
>to drive any *combination* of those loads... an "octal
>driver".
>
>You can probably find something automotive that would give you
>8 such outputs in a package (though 8@2A would likely be
>pushing the power dissipation of a normal package) -- but it
>would likely have an I2C or SPI interface, requiring you
>to do the "decoding"/selection elsewhere.
>

There are lots of SPI power drivers, like TPIC6595, but not 6 pins.
Somebody makes a higher-current 4-channel part.

Some logic chip could drive a power buffer, like ULN2003. But 8 loads
at 2 amps each is extreme. Discrete fets make more sense at these
currents.

What's the load?