The ISC0402 is the latest large format 20 micron pixel ROIC design. Compatible with P-on-N detectors such as InSb, QWIP, InGaAs, and MCT, this large format 640 x 512 array is an updated design from our ISC9901 device, with a pixel pitch of 20 microns. It offers the same advanced feature set as all our standard designs; including windowing, image transposition, adjustable gain, snapshot integration integrate-then-read and integrate-while-read modes, interlaced/non-interlaced readout, power adjustment, as well as multiple output channels allowing date rates of up to 120 frames/sec for full frame operation and 6968 frames/sec for small window sizes. Two versions of the design are available with different size integration capacitors 3.5e6 for the smaller well and >6e6 electrons for the large well version.