Dell Comprehensive Guide to the ST2220T and ST2220TC Monitors

Pin Number 4-pin Side of the connector

1DMU

2VCC

3DPU

4GND

USB Downstream Connector

Pin Number	4-Pin Side of the Signal Cable
1	VCC
2	DMD
3	DPD
4	GND

USB Ports

•1 upstream at bottom

•3 downstream at side

NOTE: USB 2.0 functionality requires a USB 2.0-capable computer

NOTE: The monitor's USB interface works only when the monitor is on or in power save mode. If you turn off the monitor and then turn it on, the attached p to resume normal functionality.

Plug and Play Capability

You can install the monitor in any Plug and Play-compatible system. The monitor automatically provides the computer system with its Extended Display Identification Data (EDID) using Display Data Channel (DDC) protocols so the system can configure itself and optimize the monitor settings. Most monitor installations are automatic; you can select different settings if desired. For more information about changing the monitor settings, see Operating the monitor.

Monitor Specifications

Screen type	Active matrix - TFT LCD
Panel Type	IPS
Screen dimensions	21.5 inches (21.5-inch measured diagonally viewable image
	size)
Preset display area:
Horizontal:	475.2 mm (18.71 inches)
Vertical:	267.3 mm (10.52 inches)
Pixel pitch	0.2475 mm
Viewing angle	178° (vertical) typical, 178° (horizontal) typical
Luminance output	250 CD/m² (typical)
Contrast ratio	1000:1 (typical)
Dynamic contrast	50,000:1 (typical)
ratio
Faceplate coating	Glare with Anti-Smudge coating (4H)
Backlight	CCFL
Response Time	8 ms with Overdrive (g-to-g)