USC1843

The USC1843 has the following features including RGB color output;Low power CMOS;Single SV supply;Direct monitor drive;Low glitch energy;4 bit resolution;TTL l CMOS compatible;High speed operation;37.5/75 ohm drive;Built-in reference;4 ns settling time (typical);7 ns delay time (typical);Composite sync (green channel);Composite blanking.

The USC1843 is a monolithic high speed silicon gate CMOS D/A converter containing three video DACs.Each DAC will convert 4 bit digital information into the drive for the respective RGB color.  Current sources are switched to set the output levels into the monitor load.  Either 75 or 37.5 ohm loads may be driven.  The device contains current sources for blanking on each output and sync source on the green output channel.Each output of the USC1843 Video DAC is a current source whose full scale values are set by  an  external  resistor.   This  resistor  is connected to the internal 123V reference. The current through the resistor (Ip) equals 1.5 LSB of output current. Either a pot or a faced resistor with the full scale current set in the monitor may be used. All current sources are ratioed to IP.

The USC1843 described in this document are designed, developed and manufactured as contemplated for general use, including without limitation, ordinary industrial use, general office use, personal use, and household use, but are not designed, developed and manufactured as contemplated (1) for any use that includes fatal risks or dangers that, unless extremely high safety is secured, could have a serious effect to the public, and could lead directly to death, personal injury, severe physical damage or other loss (i.e., nuclear reaction control in nuclear facility, aircraft flight control, air traffic control, mass transport control, medical life support system, missile launch control in weapon system), or (2) for any use where chance of failure is intolerable (i.e., submersible repeater and artificial satellite).

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