# IC power-supply pin

> power supply connections for integrated circuits

**Wikidata**: [Q2645700](https://www.wikidata.org/wiki/Q2645700)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/IC_power-supply_pin)  
**Source**: https://4ort.xyz/entity/ic-power-supply-pin

## Summary
An IC power-supply pin is a lead on an integrated circuit that provides the circuit's electric power input. It is the electrical connection point on an IC that interfaces with a voltage rail to deliver operating voltage.

## Key Facts
- An IC power-supply pin is classified as a subclass of "lead" (a connecting wire or pad within an electronic device).  
- Primary use: input, with qualifier "electric power."  
- Common aliases include: VDD, Vcc, V_cc, V+, V_in, IC power supply pin, IC power pin, integrated circuit power-supply pin.  
- Physically interacts with: voltage rail (interaction criterion: electrical conduction).  
- Wikidata description: "power supply connections for integrated circuits."  
- Wikipedia article title: "IC power-supply pin"; available in at least five languages (cs, de, en, fa, pt).  
- Freebase identifier: /m/05hncc (reference with publication date 2013-10-28).  
- Microsoft Academic ID (discontinued): 80054230.  
- Sitelink count on the entity: 5; parent "lead" has a sitelink_count of 17.  
- Described at: https://www.origin-ic.com/blog/vcc-meaning-positive-supply-voltage-in-electronic-circuits/47932

## FAQs
### Q: What is an IC power-supply pin?
A: An IC power-supply pin is a lead on an integrated circuit whose function is to accept the electric power input required for the IC's operation. It connects the IC internally to an external voltage rail.

### Q: What names are commonly used for an IC power-supply pin?
A: Common names and aliases include VDD, Vcc, V_cc, V+, V_in, IC power supply pin, and IC power pin.

### Q: How does an IC power-supply pin interact with the rest of the electrical system?
A: It physically interacts with a voltage rail by electrical conduction, providing the conductive path for the supply voltage into the integrated circuit.

### Q: How is an IC power-supply pin classified in device terminology?
A: It is a type of "lead" — a connecting wire or metal pad that forms an electrical connection from the device to external circuitry.

## Why It Matters
IC power-supply pins provide the essential electrical input that allows integrated circuits to operate. As the designated leads for supply voltage, they form the physical and electrical interface between an IC's internal circuitry and the external voltage rails that power a system. Correctly identified and connected power-supply pins ensure that an IC receives the intended supply voltage and is electrically referenced to the rest of the system. In device documentation, design, and PCB layout, knowing which leads serve as power-supply pins and how they are labeled (VDD, Vcc, V+, etc.) is fundamental for reliable power distribution, proper grounding, and safe operation. Because these pins are classified as leads and defined by their electrical conduction to voltage rails, they are a basic but critical element in electronic design, testing, and manufacturing workflows.

## Notable For
- Being a subclass of "lead," i.e., a direct physical electrical connection (wire or SMD pad) from an IC to external circuitry.  
- Standard set of widely used aliases (VDD, Vcc, V_in, etc.), making the term recognizable across documentation and schematics.  
- Explicit electrical interaction with voltage rails, specified with the criterion "electrical conduction."  
- Presence in mainstream reference databases (Freebase ID /m/05hncc) and coverage across multiple Wikipedia language editions (cs, de, en, fa, pt).  
- Recorded identifiers in academic/catalogue systems (Microsoft Academic ID 80054230, noted as discontinued).

## Body
### Definition
- An IC power-supply pin is a power supply connection on an integrated circuit.  
- It is the point at which electric power is provided to the IC.

### Classification and Parent
- Subclass of: lead.  
- Parent "lead" described as a connecting wire or pad within an electronic device; an electrical connection consisting of a length of rigid wire or a metal pad (SMD) that comes from a device.

### Function / Use
- Use: input.  
- Use qualifier: electric power.  
- Role: accept and conduct supply voltage into the integrated circuit.

### Physical Interaction
- Physically interacts with: voltage rail.  
- Interaction criterion: electrical conduction.  
- This denotes a conductive electrical path between the IC power pin and the system voltage rail.

### Names and Aliases
- Known aliases: VDD, Vcc, V_cc, V+, V_in, IC power supply pin, IC power pin, integrated circuit power-supply pin.  
- These aliases are used in schematics, component datasheets, and documentation to refer to the same type of power-supply lead.

### Identifiers and Links
- Wikidata description: "power supply connections for integrated circuits."  
- Wikipedia title: "IC power-supply pin."  
- Wikipedia language editions listed: cs, de, en, fa, pt.  
- Freebase ID: /m/05hncc (reference date 2013-10-28).  
- Microsoft Academic ID (discontinued): 80054230.  
- Entity sitelink count: 5.  
- Described at URL: https://www.origin-ic.com/blog/vcc-meaning-positive-supply-voltage-in-electronic-circuits/47932

### Documentation and References
- The entity is documented in knowledge bases and has cross-references (Freebase, Wikidata, Wikipedia entries in multiple languages).  
- Parent "lead" entry has a sitelink_count of 17, indicating broader documentation for the general connection type.

## References

1. Freebase Data Dumps. 2013