Description
SK hynix Unbuffered DDR4 SDRAM DIMMs (Unbuffered Double Data Rate Synchronous DRAM Dual In-Line
Memory Modules) are low power, high-speed operation memory modules that use DDR4 SDRAM devices.
These Unbuffered SDRAM DIMMs are intended for use as main memory when installed in systems such as
PCs and workstations.
Features
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Power Supply: VDD=1.2V (1.14V to 1.26V)
VDDQ = 1.2V (1.14V to 1.26V)
VPP - 2.5V (2.375V to 2.75V)
VDDSPD=2.25V to 3.6V
Functionality and operations comply with the DDR4 SDRAM datasheet
16 internal banks
Bank Grouping is applied, and CAS to CAS latency (tCCD_L, tCCD_S) for the banks in the same or dif-
ferent bank group accesses are available
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Data transfer rates: PC4-3200, PC4-2933, PC4-2666, PC4-2400, PC4-2133, PC4-1866, PC4-1600
Bi-Directional Differential Data Strobe
8 bit pre-fetch
Burst Length (BL) switch on-the-fly BL8 or BC4(Burst Chop)
Supports ECC error correction and detection
On-Die Termination (ODT)
Temperature sensor with integrated SPD for ECC UDIMM
This product is in compliance with the RoHS directive.
Per DRAM Addressability is supported
Internal Vref DQ level generation is available
Ordering Information
# of
ranks
Part Number
Density
Organization
Component Composition
HMA851U6CJR6N-UH/VK/WM/XN
HMA81GU6CJR8N-UH/VK/WM/XN
HMA81GU7CJR8N-VK
4GB
8GB
512Mx64
1Gx64
1Gx72
2Gx64
2Gx72
512Mx16(H5AN8G6NCJR)*4
1Gx8(H5AN8G8NCJR)*8
1Gx8(H5AN8G8NCJR)*9
1Gx8(H5AN8G8NCJR)*16
1Gx8(H5AN8G8NCJR)*18
1
1
1
2
2
8GB
HMA82GU6CJR8N-UH/VK/WM/XN
HMA82GU7CJR8N-VK
16GB
16GB
Rev. 1.5 / Jan.2020
3