DB13W3

DB13W3
Male 13W3 plug
Type Computer video connector
Superseded by Analog interfaces such as VGA and DVI-A and digital interfaces such as DVI-D, HDMI and DisplayPort
General specifications
Hot pluggable Yes
External Yes
Video signal Analogue RGB or monochrome
Pins 13
Pinout
Pin Sun SGI/
DCC
Pin 1 Ground/
DDC-SCL		 Monitor ID bit 3/
Data clock (SCL)
Pin 2 Vertical sync/
NC		 Monitor ID bit 0/
Bi-directional data (SDA)
Pin 3 Sense #2/
NC		 Composite sync/
Composite sync
Pin 4 Sense ground/
DDC ground		 Horizontal drive/
Horizontal sync
Pin 5 Composite sync Vertical drive/
Vertical sync
Pin 6 Horizontal sync/
DDC-SDA		 Monitor ID bit 1/
DDC (+5V input)
Pin 7 Ground/
VSYNC		 Monitor ID bit 2/
DDC ground
Pin 8 Sense #1/
NC		 Digital ground/
Ground
Pin 9 Sense #0 /NC Digital ground/
Ground
Pin 10 Composite ground Sync ground/
Ground
A1 Red Red
A2 Green
(gray for monochrome)		 Green
(gray for monochrome)
A3 Blue Blue

DB13W3 (13W3) is a style of D-subminiature connector used for analog video interfaces. The 13 refers to the total number of pins, the W refers to workstation and the 3 refers to the number of high-frequency pins. The connector became a pseudo-standard for high-end graphical workstations from the early 1990s to the early 2000s.

Usage

Video

The 13W3 connector became a pseudo-standard for high-end graphical workstations from the early 1990s to the early 2000s.: 176 : 43  Among its primary users included Sun Microsystems, Silicon Graphics (SGI) and IBM (the latter for use with their RISC workstations),: 176 : 281, 305  as well as some displays from Apple, NeXT and Intergraph.: 286 

Implementations of this connector in terms of pin-out varied widely, not only between different vendors but also between different families of workstations within the same company. This led to some complication for corporate buyers and service personnel of these workstations due to peripherals and accessories floating in the marketplace that offered these connectors while intended for only one family of workstations. The intentionally closed ecosystem of displays and peripherals for workstations prevented this from becoming a major issue;: 176  nonetheless, some companies such as Mitsubishi, Eiki, and Samsung offered third-party displays (and even projectors) for such graphical workstations.: 12 

The 13W3 connector is no longer used with modern displays, having been considered a legacy connector since at least 2006. Among the last commercial products sold with the connector were KVM switches. It was superseded for use with analog displays by the VGA connector, and as the display market has moved to digital flat panel displays that has in turn been replaced almost entirely by digital connections (DVI, HDMI, or DisplayPort).: 177–181 

Non-video

The backside of 3Com switch with a DB13W3 connector

A variant of the DB13W3 connector, with high-current pins instead of the high-frequency pins used for video applications, is also used by some 3Com SuperStack Ethernet switches to carry DC power.

It has also been used in various industrial appliances.

Specifications

The DB13W3 connector has 10 standard contacts and three coaxial cavities. In Sun systems, the three coaxial contacts carry analog red, green, and blue video signals.

See also

References

  1. ↑ Goldwasser, Sam (October 1999). "Monitor Repair: The Finale!". Electronics Now. 70 (10). Gernsback Publications: 6–10. ProQuest 218620746.
  2. ↑ Moyer, Charmaine; Linda Rae Sande; Kwong Liew (1999) [1997]. Octane Workstation Owner's Guide (PDF). Silicon Graphics, Inc. pp. 309–310. Archived from the original (PDF) on June 2, 2012.
  3. ↑ "What is DB13w3 connector?". sgconnector.com (in Simplified Chinese). 2025-09-08. Retrieved 2025-09-17.
  4. 1 2 3 4 Myers, Robert L. (2002). Display Interfaces: Fundamentals and Standards. Society for Information Display. Chichester, England: Wiley. ISBN 0-470-84614-3. OCLC 52613800 – via Google Books.
  5. 1 2 "Samsung SyncMaster 700TFT". PC Magazine. 9 (2). United Kingdom: ZDNet: 146. February 2000 – via Gale.
  6. 1 2 Spiwak, Marc (March 20, 2006). "All-in-One KVM Eases Installs". CRN (1188). VNU Business Publications: 43. ProQuest 227565328.
  7. 1 2 The Directory of Video, Multimedia & Audio-Visual Products (1999–2000 ed.). Daniels Publishing Group. 1999. pp. 281, 286, 305. ISBN 0-9651422-7-2 – via Google Books.
  8. ↑ "Green screen". MacFormat (317). Future Publishing: 84–86. October 2017. ProQuest 2046688629.
  9. ↑ Benford, Tom (March 1993). "Test Lab: Mitsubishi Diamond Pro 17". Compute!. 15 (3). General Media International: 12. ProQuest 223192498.
  10. ↑ "Eiki LCD Projectors". Commerce Business Daily. United States Department of Commerce, Office of Field Services: 1. August 9, 1999. ProQuest 258474001.
  11. ↑ Tetz, Edward; Timothy L. Warner; Glen E. Clarke (2019). CompTIA A+ Certification All-in-One For Dummies. Wiley. pp. 306–307. ISBN 9781119581093 – via Google Books.
  12. ↑ "SuperStack II Dual Speed Hub 500 12-Port TP (3C16610) and 24-Port TP (3C16611) User Guide" (PDF). 3Com. January 1998. Archived (PDF) from the original on July 21, 2004.
  13. ↑ "Sun Ultra 1 Series Reference Manual" (PDF). Sun Microsystems. 1997. Retrieved 25 September 2026.