SN55LVRA4-SEP is a radiation tolerant device in a plastic package which is qualified and screened for space applications. The device was verified immune to 50MeV × cm² / mg at 125°C for single event latch-up (SEL). Each fabrication lot was tested according to MIL-STD-883 for Radiation Lot Acceptance Tested (RLAT) up to 30krad(Si) at HDR and each assembly and test lot follows the process flow shown in Figure 1-1. To maintain the quality of SN55LVRA4-SEP, the device is qualified with Space EP requirements. See Section 2 for further details.