IC identification help?

D

DaveC

Guest
Working on a car alarm (Clifford) that has a few components I can't identify.
I've searched IC Master's site and others I found, but get no hits.

The alarm is built around a 40-pin DIP microcontroller that think (!) I've
identified as a National MM9224. It was discontinued in 1997, and National
isn't interested in giving me any information on it, not even package (40
pins?). It has this text on it:
(NS logo) B9224AB
16-002

I'm not interested in getting a replacement (and since it contains code, that
is an impossibility). But to get pin data would help me troubleshoot the
entire system.

The other IC is an 8-pin DIP with this text:
9132
73-544

The first, I presume, is a date code. I've searched on the latter number but
come up blank. Any ideas?

Thanks,
--
Dave C.
dave-usenet3016@mailblocks.com

Franc said:

Could the 9224 be a date code? In any case the chip is most likely a
uP, possibly a mask ROMmed type, which would make it hard, if not
impossible, to replace from third party sources.

- Franc Zabkar
Click to expand...
 
In article <0001HW.BB62792F0002A04202066130@news.individual.net>,
dave-usenet3016@mailblocks.com mentioned...
Working on a car alarm (Clifford) that has a few components I can't identify.
I've searched IC Master's site and others I found, but get no hits.

The alarm is built around a 40-pin DIP microcontroller that think (!) I've
identified as a National MM9224. It was discontinued in 1997, and National
isn't interested in giving me any information on it, not even package (40
pins?). It has this text on it:
(NS logo) B9224AB
16-002

I'm not interested in getting a replacement (and since it contains code, that
is an impossibility). But to get pin data would help me troubleshoot the
entire system.
Click to expand...
Problem is that the I/O pins are inputs, or outputs, or both inputs
and outputs, depending on how the uC is configured. So about the only
things you can be sure of are the power and ground, and some
reset and clock or oscillator pins, which you can figure out without
the pinout. See if the thing is getting power and oscillating, it
could be a bad xtal.

The other IC is an 8-pin DIP with this text:
9132
73-544

The first, I presume, is a date code. I've searched on the latter number but
come up blank. Any ideas?
Click to expand...
Might be a 555, since they are often used in alarms. If it has some
resistors and caps near it, it might be a 555. Or else might be a
comparator. Determine if it's analog or digital, but I strongly
suspect it would be analog with only 8 pins. Then look for signals
coming in and going out.

Thanks,
Click to expand...

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On Fri, 15 Aug 2003 15:41:05 -0700, Watson A.Name - 'Watt Sun' wrote
(in message <MPG.19a7015899320b28989bc9@news.inreach.net>):

Problem is that the I/O pins are inputs, or outputs, or both inputs
and outputs, depending on how the uC is configured. So about the only
things you can be sure of are the power and ground, and some
reset and clock or oscillator pins, which you can figure out without
the pinout. See if the thing is getting power and oscillating, it
could be a bad xtal.
Click to expand...
I'm beginning to suspect the xtal (or is it a resonator -- labeled "Y1" [see
post elsewhere in this NG] ). If it has gone bad, what symptoms can it
display? The microcontroller seems to be oscillating badly ("machineguns" the
output relays at approx 10 Hz).

The other IC is an 8-pin DIP with this text:
9132
73-544

The first, I presume, is a date code. I've searched on the latter number
but come up blank. Any ideas?

Might be a 555, since they are often used in alarms. If it has some
resistors and caps near it, it might be a 555. Or else might be a
comparator. Determine if it's analog or digital, but I strongly
suspect it would be analog with only 8 pins. Then look for signals
coming in and going out.
Click to expand...
No caps connected to it; resistors only. Smells like an op-amp, maybe
comparator, as you say?
--
Dave C.
dave-usenet3016@mailblocks.com
 
On Fri, 15 Aug 2003 11:49:03 -0700, DaveC
<dave-usenet3016@mailblocks.com> put finger to keyboard and composed:

Working on a car alarm (Clifford) that has a few components I can't identify.
I've searched IC Master's site and others I found, but get no hits.

The alarm is built around a 40-pin DIP microcontroller that think (!) I've
identified as a National MM9224. It was discontinued in 1997, and National
isn't interested in giving me any information on it, not even package (40
pins?). It has this text on it:
(NS logo) B9224AB
16-002

I'm not interested in getting a replacement (and since it contains code, that
is an impossibility). But to get pin data would help me troubleshoot the
entire system.

The other IC is an 8-pin DIP with this text:
9132
73-544

The first, I presume, is a date code. I've searched on the latter number but
come up blank. Any ideas?
Click to expand...
Serial EEPROM? Supervisor IC?


- Franc Zabkar
--
Please remove one 's' from my address when replying by email.
 
On Sun, 17 Aug 2003 6:47:09 -0700, Franc Zabkar wrote
(in message <eo1vjv8gk4ucdk6l4b52hn9qs7ngnlqlrg@4ax.com>):

On Fri, 15 Aug 2003 11:49:03 -0700, DaveC
dave-usenet3016@mailblocks.com> put finger to keyboard and composed:

Working on a car alarm (Clifford) that has a few components I can't
identify. I've searched IC Master's site and others I found, but get
no hits.

The alarm is built around a 40-pin DIP microcontroller that think (!) I've
identified as a National MM9224. It was discontinued in 1997, and National
isn't interested in giving me any information on it, not even package (40
pins?). It has this text on it:
(NS logo) B9224AB
16-002

I'm not interested in getting a replacement (and since it contains code,
that is an impossibility). But to get pin data would help me troubleshoot
the entire system.

The other IC is an 8-pin DIP with this text:
9132
73-544

The first, I presume, is a date code. I've searched on the latter number
but come up blank. Any ideas?

Serial EEPROM? Supervisor IC?
Click to expand...
What makes you think of these types?

Could you please provide me with Mfr and P/N for each of these?

Thanks,
--
Dave C.
dave-usenet3016@mailblocks.com
 
On Sun, 17 Aug 2003 14:24:51 -0700, DaveC
<dave-usenet3016@mailblocks.com> put finger to keyboard and composed:

On Sun, 17 Aug 2003 6:47:09 -0700, Franc Zabkar wrote
(in message <eo1vjv8gk4ucdk6l4b52hn9qs7ngnlqlrg@4ax.com>):

On Fri, 15 Aug 2003 11:49:03 -0700, DaveC
dave-usenet3016@mailblocks.com> put finger to keyboard and composed:

Working on a car alarm (Clifford) that has a few components I can't
identify. I've searched IC Master's site and others I found, but get
no hits.

The alarm is built around a 40-pin DIP microcontroller that think (!) I've
identified as a National MM9224. It was discontinued in 1997, and National
isn't interested in giving me any information on it, not even package (40
pins?). It has this text on it:
(NS logo) B9224AB
16-002

I'm not interested in getting a replacement (and since it contains code,
that is an impossibility). But to get pin data would help me troubleshoot
the entire system.

The other IC is an 8-pin DIP with this text:
9132
73-544

The first, I presume, is a date code. I've searched on the latter number
but come up blank. Any ideas?

Serial EEPROM? Supervisor IC?

What makes you think of these types?

Could you please provide me with Mfr and P/N for each of these?
Click to expand...
A serial EEPROM may have a part number such as 93C46 or 24C08. Parts
such as these are used to store codes, such as in "code hopping"
alarms.

A supervisor IC monitors the power supply and can hold the uP in the
reset state if the voltage is not within acceptable limits. This
prevents indeterminate operation when the uP has no sanity.

Thanks,
Click to expand...

- Franc Zabkar
--
Please remove one 's' from my address when replying by email.
 
On Sun, 17 Aug 2003 14:24:51 -0700, DaveC
<dave-usenet3016@mailblocks.com> put finger to keyboard and composed:

On Sun, 17 Aug 2003 6:47:09 -0700, Franc Zabkar wrote
(in message <eo1vjv8gk4ucdk6l4b52hn9qs7ngnlqlrg@4ax.com>):

On Fri, 15 Aug 2003 11:49:03 -0700, DaveC
dave-usenet3016@mailblocks.com> put finger to keyboard and composed:

Working on a car alarm (Clifford) that has a few components I can't
identify. I've searched IC Master's site and others I found, but get
no hits.

The alarm is built around a 40-pin DIP microcontroller that think (!) I've
identified as a National MM9224. It was discontinued in 1997, and National
isn't interested in giving me any information on it, not even package (40
pins?). It has this text on it:
(NS logo) B9224AB
16-002

I'm not interested in getting a replacement (and since it contains code,
that is an impossibility). But to get pin data would help me troubleshoot
the entire system.

The other IC is an 8-pin DIP with this text:
9132
73-544

The first, I presume, is a date code. I've searched on the latter number
but come up blank. Any ideas?

Serial EEPROM? Supervisor IC?

What makes you think of these types?

Could you please provide me with Mfr and P/N for each of these?
Click to expand...
Here is just one of *many* interesting possibilities:
http://www.catsemi.com/documents/1023.pdf

It is described as a "Supervisory Circuit with I2C Serial 2K CMOS
EEPROM, Manual Reset and Watchdog Timer Monitors WDI pin, Active High
& Low Reset."

Other versions are here:
http://www.catsemi.com/datasheets/mixedsignal.html#03


- Franc Zabkar
--
Please remove one 's' from my address when replying by email.
 
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