PIC flash controller IC in SOT-23 package

[Winfield Hill]

A cool easy-to-use 6-pin PIC controller in a SOT-23 package,
http://ww1.microchip.com/downloads/en/DeviceDoc/41210B.pdf
http://ww1.microchip.com/downloads/en/DeviceDoc/41239A.pdf
In circuit flash reprogrammable, and PIC10F204, 206 versions
include a voltage reference and comparator module.

Thanks,
- Win

(email: use hill_at_rowland-dot-org for now)

 

[Spehro Pefhany]

A cool easy-to-use 6-pin PIC controller in a SOT-23 package,
http://ww1.microchip.com/downloads/en/DeviceDoc/41210B.pdf
http://ww1.microchip.com/downloads/en/DeviceDoc/41239A.pdf
In circuit flash reprogrammable, and PIC10F204, 206 versions
include a voltage reference and comparator module.

No BOD module... I wonder which knucklehead made that decision.

Best regards,
Spehro Pefhany

 

[Activ8]

No BOD module... I wonder which knucklehead made that decision.

Best regards,
Spehro Pefhany

No kidding. One of 'em's adv info, so maybe it isn't to late to
change.

If they want to change... change must come from within.

 

[Mike Harrison]

No BOD module... I wonder which knucklehead made that decision.

Agreed, but last time I complained to MCT about their BODs - even when they are present they are
power hogs, unuseable for most battery apps - he said that the reference takes up quite a lot of
silicon, which is why they weren't in the smaller parts.

Pity, as it means that many apps for the SOT-23 will lose 25% of the pins for a reset.

 

[Al]

A cool easy-to-use 6-pin PIC controller in a SOT-23 package,
http://ww1.microchip.com/downloads/en/DeviceDoc/41210B.pdf
http://ww1.microchip.com/downloads/en/DeviceDoc/41239A.pdf
In circuit flash reprogrammable, and PIC10F204, 206 versions
include a voltage reference and comparator module.

Thanks,
- Win

(email: use hill_at_rowland-dot-org for now)

I'm waiting for a 3 pin version: one I/O, power and ground ;-)

Al

 

[Fred Bartoli]

I'm waiting for a 3 pin version: one I/O, power and ground ;-)

Or 2 pins with muxed power and i/o. But you won't have to wait too long :
Onewire already exist.

Thanks,
Fred.

 

[Al Borowski]

Or 2 pins with muxed power and i/o. But you won't have to wait too long :
Onewire already exist.

Why stop there? Mux power, ground, and 8 bi directional I/O pins. Then
you will have a 1 pin chip

Al

 

[Winfield Hill]

Spehro Pefhany wrote...

No BOD module... I wonder which knucklehead made that decision.

Yep no BOD (Brown Out Reset Detection), no 8-bit A/D, no SIO, no
PWM, no EEPROM, no extra timers, etc. But it has an internal 4MHz
oscillator with a 1% calibration instruction, using factory data.
It's micropower (barely), 170uA at 2V = 340uW, typ, 700uW max (at
4MHz). It's small (without requiring painful ball-grid assembly)
and cheap, e.g. 55 to 78 cents qty 100 from Newark (no stock yet,
60-day lead time).

Of course there are many other serious contenders for very small
processors, some with much more capability, such as Silicon Labs
C8051F300 series, 25MIPS in an "11-pin" 3mm-square footprint.

http://www.silabs.com/products/microcontroller/mlp_matrix.asp
http://www.silabs.com/products/pdf/C8051F300_short.pdf
http://www.silabs.com/products/pdf/C8051F30xrev2_3.pdf

But then, the C8051F300 doesn't cost half a buck!


Thanks,
- Win

(email: use hill_at_rowland-dot-org for now)

 

[Jan Panteltje]

A cool easy-to-use 6-pin PIC controller in a SOT-23 package,
http://ww1.microchip.com/downloads/en/DeviceDoc/41210B.pdf
http://ww1.microchip.com/downloads/en/DeviceDoc/41239A.pdf
In circuit flash reprogrammable, and PIC10F204, 206 versions
include a voltage reference and comparator module.

Thanks,
- Win

2V to 5.5V is nice!
40 years data retention should bridge the guarantee.

But how long will it take until we see the 1 pin chip? ;-)
JP

 

[Winfield Hill]

Jan Panteltje wrote...

On a sunny day Winfield Hill wrote...


But how long will it take until we see the 1 pin chip? ;-)

I'd like to see a 5-pin SOT-23, can't be installed backwards!

Thanks,
- Win

(email: use hill_at_rowland-dot-org for now)

 

[Mike Harrison]

Jan Panteltje wrote...

I'd like to see a 5-pin SOT-23, can't be installed backwards!

I once had an ap that could have used a TO-92 PIC....

 

[John Devereux]

Jan Panteltje wrote...

I'd like to see a 5-pin SOT-23, can't be installed backwards!

You would think so but that turns out not to be true!

 

[Fred Bartoli]

Jan Panteltje wrote...

I'd like to see a 5-pin SOT-23, can't be installed backwards!

Sure.
Plus if the stripped pin is the VDD one, there's no risk anymore.

Thanks,
Fred.

 

[Ken Smith]

I'm waiting for a 3 pin version: one I/O, power and ground ;-)

I want an 8 pin SO like this:

1 DAC output
2 ADC input
3 ADC input
4 Ground
5 ADC input
6 ADC input
7 DAC output
8 Vcc

I'll get them custom labled as "TIO72" and show them as a dual op-amp on
my schematics. I figure that should be lots of fun.

 

[Spehro Pefhany]

Jan Panteltje wrote...

I'd like to see a 5-pin SOT-23, can't be installed backwards!

OTOH, the QFP-80 etc. packages that are symmetrical be installed 4
ways.

Best regards,
Spehro Pefhany

 

[Joerg]

Hi Mike,

Agreed, but last time I complained to MCT about their BODs - even when they are present they are power hogs, unuseable for most battery apps - he said that the reference takes up quite a lot of silicon, which is why they weren't in the smaller parts.

I wonder what they think is so complicated about brown out reset. Why do they need a reference? How about a poor man's brown out reset using a BJT or diode and resistive divider?

Regards, Joerg

 

[Spehro Pefhany]

Hi Mike,

I wonder what they think is so complicated about brown out reset. Why do they need a reference? How about a poor man's brown out reset using a BJT or diode and resistive divider?

When it's internal oscillator-only like this one, they could do a much
sloppier job and still have an acceptable circuit. All it has to do is
detect out-of-spec supply voltage before the processor is outside of
the guaranteed-operation range.

They could even limit the supply voltage range if the BOD is enabled
and still have a good product. For example, the BOD could have a
threshold voltage in the 2.0 to 3.0V range, allowing 3.3V or 5.0V
nominal operation without external circuitry and losing an I/O, in
applications where a BOD called for. In some special applications, it
might be acceptable to cycle the Vdd to the chip regularly or to
control it with a supervisor circuit.

Best regards,
Spehro Pefhany

 

[Jan Panteltje]

On a sunny day (Mon, 7 Jun 2004 17:30:47 +0000 (UTC)) it happened

I want an 8 pin SO like this:

1 DAC output
2 ADC input
3 ADC input
4 Ground
5 ADC input
6 ADC input
7 DAC output
8 Vcc

That is close to a PIC 16F675,
it has 4 channel 10 bits ADC and some analog out you can make with PWM in
software.
JP

 

[Al]

Or 2 pins with muxed power and i/o. But you won't have to wait too long :
Onewire already exist.

Why stop there? Mux power, ground, and 8 bi directional I/O pins. Then
you will have a 1 pin chip

Al

Thanks,
Fred.

[/QUOTE]

Actually with the three pin version, you might be able to program it so
that a voltage on the input pin controls the current between the other
two pins. ;-)

Al

 

[Jan Panteltje]

Why stop there? Mux power, ground, and 8 bi directional I/O pins. Then
you will have a 1 pin chip

Al

Actually with the three pin version, you might be able to program it so
that a voltage on the input pin controls the current between the other
two pins. ;-)

Al[/QUOTE]
Already done, it is called transistor
JP