Automotive temp MCU

From: Ralph Malph (noone_at_yahoo.com)
Date: 01/25/04 

Date: Sat, 24 Jan 2004 23:21:11 -0500

I am looking at replacing several hardware chips with an MCU. I
considered this once before but was looking for a lot more in the way of
IO than I am now. Also, this time the MCU has to operate over the full
automotive temp range of -40 to +125C. I have looked at several
manufacturers web sites, but they typically don't include temperature
range in the guides. So I have to pick the dozen or so that are a
likely fit otherwise and then download every data ***.

I thought I might ask here for chips that anyone has used before that
would fit my needs.

-40C to 125C range (of course)
ISP
18 or more IOs (after accounting for ISP)
at least two outputs must drive LEDs at 20 mA
very little RAM and Flash size requirements, they just have to be there
the flash has to be writable by the MCU (or data EEPROM will do)
temperature measurement or ADC inputs
small package; TSSOP or QFN or very small QFP (like 48 TQFP)
low price, <$3 in 1k qty
easy to buy in 100's or 1000's

I have found a PIC16F818, but the IO count is very tight. I expect that
after setting it up for ISP it won't meet my needs. Microchip is *very*
hard to check for automotive temp since they have literally hundreds of
chips and temperature is not listed anywhere other than in the data
*** (and is not always noted very clearly there). Atmel AVR chips
don't seem to come in automotive temp at all AFAICT. Motorola makes a
few, but none seem to fit all my requirements (mainly pkg and cost
issues). Cygnal is way too expensive and doesn't seem to be
automotive.

Any others that I should look at? I bet there are tons of low cost
automotive 8051s.

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