W9464G6KH is a 64M DDR SDRAM and speed involving -5 and -5I.
2.5V ±0.2V Power Supply for DDR400 Up to 200 MHz Clock Frequency Double Data Rate architecture, two data transfers per clock cycle Differential clock inputs (CLK and /CLK) DQS is edge-aligned with data for Read, center-aligned with data for Write CAS Latency: 2, 2.5, and 3 Burst Length: 2, 4 and 8 Auto Refresh and Self Refresh Precharged Power Down and Active Power Down Write Data Mask Write Latency = 1 15.6μS refresh interval (4K/64 mS Refresh) Maximum burst refresh cycle: 8 Interface: SSTL_2