LPDDR4 & LPDDR4X Mobile SDRAM ISSI LPDDR4 and LPDDR4X SDRAM are low-voltage memory devices, available in 2Gb, 4Gb, and 8Gb densities. The low-voltage cores and I/O power requirements of these devices make them ideal for mobile applications. The LPDDR4 and LPDDR4X SDRAM offer a clock frequency range from 1333MHz to 1600MHz and data rates up to 3200Mbps per I/O. These devices are configured with eight internal banks per channel for concurrent operation. Both the LPDDR4 and LPDDR4X feature programmable read and write latencies in programmable and 'on-the-fly' burst lengths.