30-pin dock connector

The 30-pin dock connector is a proprietary connection interface originally designed and developed by Apple Computer. It was common to older generation Apple mobile devices (original iPhone, iPod nano, iPod touch, etc.) and was discontinued on September 12, 2012 with the introduction of the Lightning connector in the iPhone 5.
==History==
thumb|270px|right|An Apple 30-pin to USB Cable.
The 30-pin dock connector was introduced with the 3rd-generation iPod in April 2003 and was adopted by most of Apple's mobile devices, with the exception of the iPod shuffle series. Originally, the 30-pin dock connector supported FireWire, then USB, some control signals and line-level audio outputs. As iPod devices evolved, so did the dock connector, such as the addition of video signals. As FireWire was phased out of the iPods in favor of USB, there was discontinuity in signals supported by subsequent dock connector cables.
The popularity of Apple's iPod and iPhone devices led to the creation of a cottage industry of 3rd-party devices that supported the 30-pin interface. However, it was phased out and replaced by the more compact Lightning (connector), which was introduced in September 2012 by Apple Inc.
===Supported devices===
*iPad (1st to 3rd generation)
*iPhone (original to 4S)
*iPod mini (1st and 2nd generation)
*iPod nano (1st to 6th generation)
*iPod touch (1st to 4th generation)
==Pin connectors==
Pin	Signal 	Description
1 	GND 	Ground (-), internally connected with Pin 2 on iPod motherboard
2 	GND 	Audio and Video ground (-), internally connected with Pin 2 on iPod motherboard
3 	Right 	Line Out - R (+) (Audio output, right channel)
4 	Left 	Line Out - L (+) (Audio output, left channel)
5 	Right In 	Line In - R (+)
6 	Left In 	Line In - L (+)
7 	? 	?
8 	Video Out 	Composite video output (only when the slideshow mode is active on iPod Photo)
9 	S-Video Chrominance output 	for iPod Color, Photo only
10 	S-Video Luminance output 	for iPod Color, Photo only
11 	GND 	Serial GND
12 	Tx 	iPod sending line, serial TxD
13 	Rx 	iPod receiving line, serial RxD
14 	n/a 	not used
15 	GND 	Ground (-), internally connected with pin 16 on iPod motherboard
16 	GND 	USB GND (-), internally connected with pin 15 on iPod motherboard
17 	n/a 	not used
18 	3.3V 	3.3V Power (+)
19 	+12V 	Firewire Power 12VDC (+)
20 	+12V 	Firewire Power 12VDC (+)
21 	Accessory Indicator / Serial enable	Different resistances indicate accessory type
22 	TPA (-) 	FireWire TPA (-)
23 	5 VDC (+) 	USB Power 5 VDC (+)
24 	TPA (+) 	FireWire TPA (+)
25 	Data (-) 	USB Data (-)
26 	TPB (-) 	FireWire Data TPB (-)
27 	Data (+) 	USB Data (+)
28 	TPB (+) 	FireWire Data TPB (+)
29 	GND 	FireWire Ground (-)
30 	GND 	FireWire Ground (-)
==External links==
*Questions & Answers for Apple 30-pin to USB Cable at Apple
**Apple 30-pin to USB Cable
**Apple 30-pin to VGA Adapter
**Apple 30-pin Digital AV Adapter
**Lightning to 30-pin Adapter
* at Wikipedia
Category:Apple hardware
Category:Connectors
Category:2003 introductions