Does anybody know what this IC is?
$begingroup$
I tried different search keywords combinations, but I couldn’t find a datasheet, nor a hint of what this IC could be. Maybe someone who’s familiar with it could give me a clue. 
The IC is on a board that was part of the control panel of a home theater. The options were volume up and down, surround 2.1 or 5.1 and mute. The brand was National Star, as far as I can recall. Thanks in advance.
identification small-electronics
asked Feb 16 at 23:10
Damián GonzálezDamián González
114
$endgroup$
add a comment |
$begingroup$
I tried different search keywords combinations, but I couldn’t find a datasheet, nor a hint of what this IC could be. Maybe someone who’s familiar with it could give me a clue.
The IC is on a board that was part of the control panel of a home theater. The options were volume up and down, surround 2.1 or 5.1 and mute. The brand was National Star, as far as I can recall. Thanks in advance.
identification small-electronics
asked Feb 16 at 23:10
Damián GonzálezDamián González
114
$endgroup$
1
$begingroup$
@Damián - Hi, From the photos, I'll just make two short comments. You haven't asked this as a repair question (it's difficult to make them on-topic here, so that's good!) but assuming you believe there's a fault on that board: (a) There's very questionable soldering in several places including, but not only, whereC1andIR1used to be (and possible solder bridges in both of those places). (b) The fault on the board might be elsewhere e.g. power problems, which could cause the (suspected MCU, per Spehro's answer) IC to misbehave. I would not start by trying to replace the IC. Good luck!
$endgroup$
– SamGibson
Feb 17 at 0:31
$begingroup$
The pin mapping of the ceramic resonator, power supplies, and even reset pin, seem to match PIC16x84 and PIC16x54 microcontrollers for example.
$endgroup$
– Justme
Feb 17 at 15:31
add a comment |
$begingroup$
I tried different search keywords combinations, but I couldn’t find a datasheet, nor a hint of what this IC could be. Maybe someone who’s familiar with it could give me a clue.
The IC is on a board that was part of the control panel of a home theater. The options were volume up and down, surround 2.1 or 5.1 and mute. The brand was National Star, as far as I can recall. Thanks in advance.
identification small-electronics
asked Feb 16 at 23:10
Damián GonzálezDamián González
114
$endgroup$
I tried different search keywords combinations, but I couldn’t find a datasheet, nor a hint of what this IC could be. Maybe someone who’s familiar with it could give me a clue.
The IC is on a board that was part of the control panel of a home theater. The options were volume up and down, surround 2.1 or 5.1 and mute. The brand was National Star, as far as I can recall. Thanks in advance.
identification small-electronics
identification small-electronics
asked Feb 16 at 23:10
Damián GonzálezDamián González
114
asked Feb 16 at 23:10
Damián GonzálezDamián González
114
edited Feb 16 at 23:36
Damián González
asked Feb 16 at 23:10
Damián GonzálezDamián González
114
asked Feb 16 at 23:10
Damián GonzálezDamián González
114
asked Feb 16 at 23:10
Damián GonzálezDamián González
114
114
1
$begingroup$
@Damián - Hi, From the photos, I'll just make two short comments. You haven't asked this as a repair question (it's difficult to make them on-topic here, so that's good!) but assuming you believe there's a fault on that board: (a) There's very questionable soldering in several places including, but not only, whereC1andIR1used to be (and possible solder bridges in both of those places). (b) The fault on the board might be elsewhere e.g. power problems, which could cause the (suspected MCU, per Spehro's answer) IC to misbehave. I would not start by trying to replace the IC. Good luck!
$endgroup$
– SamGibson
Feb 17 at 0:31
$begingroup$
The pin mapping of the ceramic resonator, power supplies, and even reset pin, seem to match PIC16x84 and PIC16x54 microcontrollers for example.
$endgroup$
– Justme
Feb 17 at 15:31
add a comment |
1
$begingroup$
@Damián - Hi, From the photos, I'll just make two short comments. You haven't asked this as a repair question (it's difficult to make them on-topic here, so that's good!) but assuming you believe there's a fault on that board: (a) There's very questionable soldering in several places including, but not only, whereC1andIR1used to be (and possible solder bridges in both of those places). (b) The fault on the board might be elsewhere e.g. power problems, which could cause the (suspected MCU, per Spehro's answer) IC to misbehave. I would not start by trying to replace the IC. Good luck!
$endgroup$
– SamGibson
Feb 17 at 0:31
$begingroup$
The pin mapping of the ceramic resonator, power supplies, and even reset pin, seem to match PIC16x84 and PIC16x54 microcontrollers for example.
$endgroup$
– Justme
Feb 17 at 15:31
1
1
$begingroup$
@Damián - Hi, From the photos, I'll just make two short comments. You haven't asked this as a repair question (it's difficult to make them on-topic here, so that's good!) but assuming you believe there's a fault on that board: (a) There's very questionable soldering in several places including, but not only, where
C1 and IR1 used to be (and possible solder bridges in both of those places). (b) The fault on the board might be elsewhere e.g. power problems, which could cause the (suspected MCU, per Spehro's answer) IC to misbehave. I would not start by trying to replace the IC. Good luck!$endgroup$
– SamGibson
Feb 17 at 0:31
$begingroup$
@Damián - Hi, From the photos, I'll just make two short comments. You haven't asked this as a repair question (it's difficult to make them on-topic here, so that's good!) but assuming you believe there's a fault on that board: (a) There's very questionable soldering in several places including, but not only, where
C1 and IR1 used to be (and possible solder bridges in both of those places). (b) The fault on the board might be elsewhere e.g. power problems, which could cause the (suspected MCU, per Spehro's answer) IC to misbehave. I would not start by trying to replace the IC. Good luck!$endgroup$
– SamGibson
Feb 17 at 0:31
$begingroup$
The pin mapping of the ceramic resonator, power supplies, and even reset pin, seem to match PIC16x84 and PIC16x54 microcontrollers for example.
$endgroup$
– Justme
Feb 17 at 15:31
$begingroup$
The pin mapping of the ceramic resonator, power supplies, and even reset pin, seem to match PIC16x84 and PIC16x54 microcontrollers for example.
$endgroup$
– Justme
Feb 17 at 15:31
add a comment |
3 Answers
3
active
oldest
votes
$begingroup$
Judging by the ceramic resonator and load capacitors connected to pins 15 and 16, it's almost surely a microcontroller with a custom program in OTP or flash memory. And typically the program memory is read-protected for the security of the manufacturer's firmware.
So more than likely it's not the sort of thing you'll be able to buy from other sources than the original, such as a used board or repair part.
answered Feb 16 at 23:56
Spehro PefhanySpehro Pefhany
211k5162425
$endgroup$
4
$begingroup$
Please note SamGibson's comment- the chip is not the most likely failure point. The other parts are all easily inspected and are very common parts most likely.
$endgroup$
– Spehro Pefhany
Feb 17 at 0:38
$begingroup$
Certain Microchip PICs, e.g. PIC16C5x, come in DIP-18 and have Osc pins at 15 &16.
$endgroup$
– user28910
Feb 18 at 2:22
add a comment |
$begingroup$
Looks like a remote control decoder. LED1 though LED4 have drive transistors and LED5 doesn't - I'd theorise it's an IR LED to receive remote codes.
edited Feb 17 at 23:45
Blair Fonville
2,68421027
answered Feb 17 at 19:01
Chris Y'BoyChris Y'Boy
1
$endgroup$
$begingroup$
I can recall a remote control being part of the original package.
$endgroup$
– Damián González
Feb 17 at 21:17
add a comment |
$begingroup$
Most likely it is a led decoder for each switch on the board. Every time you push each of the switch the led indicator will glow that indicate which program was used. It's a signal decoder ic and not commonly failed in a circuits. My advice is to resolder each components. Nevertheless, check the vdc supply and test each transistor on the pcb for failure. Good luck!.
answered Feb 18 at 16:14
RasRas
1
$endgroup$
add a comment |
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3 Answers
3
active
oldest
votes
3 Answers
3
active
oldest
votes
active
oldest
votes
active
oldest
votes
$begingroup$
Judging by the ceramic resonator and load capacitors connected to pins 15 and 16, it's almost surely a microcontroller with a custom program in OTP or flash memory. And typically the program memory is read-protected for the security of the manufacturer's firmware.
So more than likely it's not the sort of thing you'll be able to buy from other sources than the original, such as a used board or repair part.
answered Feb 16 at 23:56
Spehro PefhanySpehro Pefhany
211k5162425
$endgroup$
4
$begingroup$
Please note SamGibson's comment- the chip is not the most likely failure point. The other parts are all easily inspected and are very common parts most likely.
$endgroup$
– Spehro Pefhany
Feb 17 at 0:38
$begingroup$
Certain Microchip PICs, e.g. PIC16C5x, come in DIP-18 and have Osc pins at 15 &16.
$endgroup$
– user28910
Feb 18 at 2:22
add a comment |
$begingroup$
Judging by the ceramic resonator and load capacitors connected to pins 15 and 16, it's almost surely a microcontroller with a custom program in OTP or flash memory. And typically the program memory is read-protected for the security of the manufacturer's firmware.
So more than likely it's not the sort of thing you'll be able to buy from other sources than the original, such as a used board or repair part.
answered Feb 16 at 23:56
Spehro PefhanySpehro Pefhany
211k5162425
$endgroup$
4
$begingroup$
Please note SamGibson's comment- the chip is not the most likely failure point. The other parts are all easily inspected and are very common parts most likely.
$endgroup$
– Spehro Pefhany
Feb 17 at 0:38
$begingroup$
Certain Microchip PICs, e.g. PIC16C5x, come in DIP-18 and have Osc pins at 15 &16.
$endgroup$
– user28910
Feb 18 at 2:22
add a comment |
$begingroup$
Judging by the ceramic resonator and load capacitors connected to pins 15 and 16, it's almost surely a microcontroller with a custom program in OTP or flash memory. And typically the program memory is read-protected for the security of the manufacturer's firmware.
So more than likely it's not the sort of thing you'll be able to buy from other sources than the original, such as a used board or repair part.
answered Feb 16 at 23:56
Spehro PefhanySpehro Pefhany
211k5162425
$endgroup$
Judging by the ceramic resonator and load capacitors connected to pins 15 and 16, it's almost surely a microcontroller with a custom program in OTP or flash memory. And typically the program memory is read-protected for the security of the manufacturer's firmware.
So more than likely it's not the sort of thing you'll be able to buy from other sources than the original, such as a used board or repair part.
answered Feb 16 at 23:56
Spehro PefhanySpehro Pefhany
211k5162425
edited Feb 17 at 0:12
answered Feb 16 at 23:56
Spehro PefhanySpehro Pefhany
211k5162425
answered Feb 16 at 23:56
Spehro PefhanySpehro Pefhany
211k5162425
answered Feb 16 at 23:56
Spehro PefhanySpehro Pefhany
211k5162425
211k5162425
4
$begingroup$
Please note SamGibson's comment- the chip is not the most likely failure point. The other parts are all easily inspected and are very common parts most likely.
$endgroup$
– Spehro Pefhany
Feb 17 at 0:38
$begingroup$
Certain Microchip PICs, e.g. PIC16C5x, come in DIP-18 and have Osc pins at 15 &16.
$endgroup$
– user28910
Feb 18 at 2:22
add a comment |
4
$begingroup$
Please note SamGibson's comment- the chip is not the most likely failure point. The other parts are all easily inspected and are very common parts most likely.
$endgroup$
– Spehro Pefhany
Feb 17 at 0:38
$begingroup$
Certain Microchip PICs, e.g. PIC16C5x, come in DIP-18 and have Osc pins at 15 &16.
$endgroup$
– user28910
Feb 18 at 2:22
4
4
$begingroup$
Please note SamGibson's comment- the chip is not the most likely failure point. The other parts are all easily inspected and are very common parts most likely.
$endgroup$
– Spehro Pefhany
Feb 17 at 0:38
$begingroup$
Please note SamGibson's comment- the chip is not the most likely failure point. The other parts are all easily inspected and are very common parts most likely.
$endgroup$
– Spehro Pefhany
Feb 17 at 0:38
$begingroup$
Certain Microchip PICs, e.g. PIC16C5x, come in DIP-18 and have Osc pins at 15 &16.
$endgroup$
– user28910
Feb 18 at 2:22
$begingroup$
Certain Microchip PICs, e.g. PIC16C5x, come in DIP-18 and have Osc pins at 15 &16.
$endgroup$
– user28910
Feb 18 at 2:22
add a comment |
$begingroup$
Looks like a remote control decoder. LED1 though LED4 have drive transistors and LED5 doesn't - I'd theorise it's an IR LED to receive remote codes.
edited Feb 17 at 23:45
Blair Fonville
2,68421027
answered Feb 17 at 19:01
Chris Y'BoyChris Y'Boy
1
$endgroup$
$begingroup$
I can recall a remote control being part of the original package.
$endgroup$
– Damián González
Feb 17 at 21:17
add a comment |
$begingroup$
Looks like a remote control decoder. LED1 though LED4 have drive transistors and LED5 doesn't - I'd theorise it's an IR LED to receive remote codes.
edited Feb 17 at 23:45
Blair Fonville
2,68421027
answered Feb 17 at 19:01
Chris Y'BoyChris Y'Boy
1
$endgroup$
$begingroup$
I can recall a remote control being part of the original package.
$endgroup$
– Damián González
Feb 17 at 21:17
add a comment |
$begingroup$
Looks like a remote control decoder. LED1 though LED4 have drive transistors and LED5 doesn't - I'd theorise it's an IR LED to receive remote codes.
edited Feb 17 at 23:45
Blair Fonville
2,68421027
answered Feb 17 at 19:01
Chris Y'BoyChris Y'Boy
1
$endgroup$
Looks like a remote control decoder. LED1 though LED4 have drive transistors and LED5 doesn't - I'd theorise it's an IR LED to receive remote codes.
edited Feb 17 at 23:45
Blair Fonville
2,68421027
answered Feb 17 at 19:01
Chris Y'BoyChris Y'Boy
1
edited Feb 17 at 23:45
Blair Fonville
2,68421027
edited Feb 17 at 23:45
Blair Fonville
2,68421027
edited Feb 17 at 23:45
Blair Fonville
2,68421027
2,68421027
answered Feb 17 at 19:01
Chris Y'BoyChris Y'Boy
1
answered Feb 17 at 19:01
Chris Y'BoyChris Y'Boy
1
answered Feb 17 at 19:01
Chris Y'BoyChris Y'Boy
1
1
$begingroup$
I can recall a remote control being part of the original package.
$endgroup$
– Damián González
Feb 17 at 21:17
add a comment |
$begingroup$
I can recall a remote control being part of the original package.
$endgroup$
– Damián González
Feb 17 at 21:17
$begingroup$
I can recall a remote control being part of the original package.
$endgroup$
– Damián González
Feb 17 at 21:17
$begingroup$
I can recall a remote control being part of the original package.
$endgroup$
– Damián González
Feb 17 at 21:17
add a comment |
$begingroup$
Most likely it is a led decoder for each switch on the board. Every time you push each of the switch the led indicator will glow that indicate which program was used. It's a signal decoder ic and not commonly failed in a circuits. My advice is to resolder each components. Nevertheless, check the vdc supply and test each transistor on the pcb for failure. Good luck!.
answered Feb 18 at 16:14
RasRas
1
$endgroup$
add a comment |
$begingroup$
Most likely it is a led decoder for each switch on the board. Every time you push each of the switch the led indicator will glow that indicate which program was used. It's a signal decoder ic and not commonly failed in a circuits. My advice is to resolder each components. Nevertheless, check the vdc supply and test each transistor on the pcb for failure. Good luck!.
answered Feb 18 at 16:14
RasRas
1
$endgroup$
add a comment |
$begingroup$
Most likely it is a led decoder for each switch on the board. Every time you push each of the switch the led indicator will glow that indicate which program was used. It's a signal decoder ic and not commonly failed in a circuits. My advice is to resolder each components. Nevertheless, check the vdc supply and test each transistor on the pcb for failure. Good luck!.
answered Feb 18 at 16:14
RasRas
1
$endgroup$
Most likely it is a led decoder for each switch on the board. Every time you push each of the switch the led indicator will glow that indicate which program was used. It's a signal decoder ic and not commonly failed in a circuits. My advice is to resolder each components. Nevertheless, check the vdc supply and test each transistor on the pcb for failure. Good luck!.
answered Feb 18 at 16:14
RasRas
1
answered Feb 18 at 16:14
RasRas
1
answered Feb 18 at 16:14
RasRas
1
answered Feb 18 at 16:14
RasRas
1
1
add a comment |
add a comment |
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$begingroup$
@Damián - Hi, From the photos, I'll just make two short comments. You haven't asked this as a repair question (it's difficult to make them on-topic here, so that's good!) but assuming you believe there's a fault on that board: (a) There's very questionable soldering in several places including, but not only, where
C1andIR1used to be (and possible solder bridges in both of those places). (b) The fault on the board might be elsewhere e.g. power problems, which could cause the (suspected MCU, per Spehro's answer) IC to misbehave. I would not start by trying to replace the IC. Good luck!$endgroup$
– SamGibson
Feb 17 at 0:31
$begingroup$
The pin mapping of the ceramic resonator, power supplies, and even reset pin, seem to match PIC16x84 and PIC16x54 microcontrollers for example.
$endgroup$
– Justme
Feb 17 at 15:31