Potential Risks of Using Output Pins as Input on Chips

AI Thread Summary
Inputting a signal into an output pin of a chip can lead to varying outcomes based on the strength of the output and the source impedance. If the chip's output is strong and the source impedance is high, it may not damage the chip. However, connecting a low impedance source to a weak output driver can potentially damage the output driver or even cause the chip to fail. Additionally, onboard output capacitors and protection diodes may influence the risk of damage, depending on their voltage, power ratings, and current limits. Overall, caution is advised when interfacing signals with output pins to avoid damaging the chip.
david90
Messages
311
Reaction score
2
what would happen if u input a signal into an output pin of a chip?
 
Engineering news on Phys.org
david90 said:
what would happen if u input a signal into an output pin of a chip?
Depends. If the output on the chip is strong, and the source impedance of your signal that you're connecting to the output is high (weak source), then it probably won't hurt the output of the chip. But if the source impedance of your signal is low (like a few ohms), and the driver for the chip output is not very beefy, then you will likely blow the output driver on the chip. Maybe even let a little smoke out of the chip... :rolleyes:
 
the chip could also have output capacitors onboard, or likely, protection diodes across or in series with the output built onto the chip. In this case, the voltage and power rating of the cap, and the current rating of the diodes will determine if they get damaged.
 

Thread 'Underwater piezoelectric sensor array receive sensitivity'

Hi all I have some confusion about piezoelectrical sensors combination. If i have three acoustic piezoelectrical sensors (with same receive sensitivity in dB ref V/1uPa) placed at specific distance, these sensors receive acoustic signal from a sound source placed at far field distance (Plane Wave) and from broadside. I receive output of these sensors through individual preamplifiers, add them through hardware like summer circuit adder or in software after digitization and in this way got an...
View full post »

Thread 'Following up on the recent thread about Earth Resistance measurements'

I have recently moved into a new (rather ancient) house and had a few trips of my Residual Current breaker. I dug out my old Socket tester which tell me the three pins are correct. But then the Red warning light tells me my socket(s) fail the loop test. I never had this before but my last house had an overhead supply with no Earth from the company. The tester said "get this checked" and the man said the (high but not ridiculous) earth resistance was acceptable. I stuck a new copper earth...
View full post »

Thread 'Question about bonding ground and neutral'

I am not an electrical engineering student, but a lowly apprentice electrician. I learn both on the job and also take classes for my apprenticeship. I recently wired my first transformer and I understand that the neutral and ground are bonded together in the transformer or in the service. What I don't understand is, if the neutral is a current carrying conductor, which is then bonded to the ground conductor, why does current only flow back to its source and not on the ground path...
View full post »

Similar threads

Digital phase converters for running 3-phase motors
Replies
27
Views
298
Maxwell Linear Generator (Input Power < Output Power and losses?)
Replies
2
Views
592
Troubleshooting LM311P Output Issue - Tips and Suggestions
Replies
1
Views
1K
Is There a Commercial IC to Monitor Data on a RAM Chip?
Replies
8
Views
2K
How can I reroute multiple signals from a 4 pin connector using a relay switch?
Replies
37
Views
6K
Need a Precision Voltage Divider for -10V to 10V Input and -4V to 4V Output?
Replies
15
Views
2K
Explosion of 74HC14 IC in Old Stock
Replies
11
Views
2K
Charlieplexing: LEDs have different brightness
Replies
14
Views
2K
Impedance mismatch issue in receivers
Replies
11
Views
2K
Modulation & demodulation of GPS output digital data
Replies
10
Views
1K

Hot Threads

Recent Insights

Back
Top