23.2 A 5Gb/s/pin 8Gb LPDDR4X SDRAM with power-isolated LVSTL and split-die architecture with 2-die ZQ calibration scheme. - Chang-Kyo Lee; Yoon-Joo Eom; Jin-Hee Park; Junha Lee; Hye-Ran Kim; Kihan Kim; Young Choi; Ho-Jun Chang; Jonghyuk Kim; Jong-Min Bang; Seungjun Shin; Hanna Park; et al. (ISSCC, 2017)