MT40A512M16LY-062E AAT:E

x8 configuration. DDR4 SDRAM uses an 8n prefetch architecture for high-speed operation. The 8n-prefetch architecture is combined with an interface designed to transfer two data words per clock cycle at the I /O pin. A single read or write operation of DDR4 SDRAM consists of a single 8n-bit wide, four-clock data transfer at the internal DRAM core and two corresponding n-bit wide, half-clock cycle data transfers at the I /O pins. The Industrial Temperature (IT) equipment option requires an enclosure temperature of no more than -40°C or 95°C. When the TC exceeds 85°C, the JEDEC specification requires that the refresh rate be doubled; this also requires the use of a high temperature self-refresh option. In addition, when the operating temperature Tc <0 ° C., the ODT resistance and the input/output impedance must be reduced. The Automotive Temperature (AT) device option requires that the enclosure temperature not exceed -40°C or above 105°C. When TC exceeds 85°C, the specification requires a refresh rate of 2X; when TC exceeds 95°C, the refresh rate is 4X. In addition, when the operating temperature Tc <0 ° C., the ODT resistance and the input/output impedance must be reduced. The ultra-high temperature (UT) device option requires a case temperature of no less than -40°C or more than 125°C. The specification requires a refresh rate of 2X when TC exceeds 85°C; The refresh rate is 4X when TC exceeds 95°C and 8X when TC exceeds 105°C. In addition, when the operating temperature Tc <0 ° C., the ODT resistance and the input/output impedance must be reduced. • Throughout the datasheet, various figures and texts refer to DQs as "DQ". Unless specifically stated otherwise, the DQ term is to be construed as a collective term for any and all DQs. • The terms "_t" and "_c" are used to denote the truth and complement of a differential signal pair. These terms replace the previously used symbols of "#" and/or overriding characters. For example, the differential data strobe pair DQS, DQS# is now referred to as DQS_t, DQS_c. • The term "-n" is used to denote an active low signal and replaces the previously used "#" and/or overlapping characters. Unless specifically stated otherwise, the terms "DQS" and "CK" throughout the data sheet are to be interpreted as DQS_t and DQS_c, and CK_t and CK_c, respectively. • Full functionality may be described throughout the document; any pages or diagrams may have been simplified to convey the theme and may not include all requirements