Description
The 32Gb (TwinDie™) DDR4 SDRAM uses Micron’s 16Gb DDR4 SDRAM die; two x8s combined to make one x16. It uses similar signals as the mono x16, and there is one extra ZQ connection for faster ZQ calibration and a BG1 control required for x8 addressing. Refer to Micron’s 16Gb DDR4 SDRAM data sheet (x8 option) for the specifications not included in this document. Specifications for base part number MT40A2G8 correlate to TwinDie manufacturing part number MT40A2G16.

Features
• Uses two x8 16Gb Micron die to make one x16
• Single-rank TwinDie
• VDD = VDDQ = 1.2V (1.14–1.26V)
• 1.2V VDDQ-terminated I/O
• JEDEC-standard ball-out
• Low-profile package
• TC = 0°C to 95°C
– 0°C to 85°C: 8192 refresh cycles in 64ms
– 85°C to 95°C: 8192 refresh cycles in 32ms