16Gb: x4, x8 TwinDie DDR4 SDRAM
Description
TwinDie™ 1.2V DDR4 SDRAM
MT40A4G4 – 128 Meg x 4 x 16 Banks x 2 Ranks
MT40A2G8 – 64 Meg x 8 x 16 Banks x 2 Ranks
Options
Marking
Description
The 16Gb (TwinDie™) DDR4 SDRAM uses
• Configuration
– 128 Meg x 4 x 16 banks x 2 ranks
– 64 Meg x 8 x 16 banks x 2 ranks
• FBGA package (Pb-free)
– 78-ball FBGA
(9.5mm x 13mm x 1.2mm) Die Rev :A
– 78-ball FBGA
4G4
2G8
Micron’s 8Gb DDR4 SDRAM die (essentially two ranks
of the 8Gb DDR4 SDRAM). Refer to Micron’s 8Gb
DDR4 SDRAM data sheet for the specifications not in-
cluded in this document. Specifications for base part
number MT40A2G4 correlate to TwinDie manufactur-
ing part number MT40A4G4; specifications for base
part number MT40A1G8 correlate to TwinDie manu-
facturing part number MT40A2G8.
FSE
NRE
(8.0mm x 12mm x 1.2mm) Die Rev :B
• Timing – cycle time1
– 0.750ns @ CL = 18 (DDR4-2666)
– 0.833ns @ CL = 16 (DDR4-2400)
– 0.833ns @ CL = 17 (DDR4-2400)
– 0.937ns @ CL = 15 (DDR4-2133)
– 0.937ns @ CL = 16 (DDR4-2133)
• Self refresh
-075E
-083E
-083
-093E
-093
Features
• Uses 8Gb Micron die
• Two ranks (includes dual CS#, ODT, and CKE balls)
• Each rank has 4 groups of 4 internal banks for con-
current operation
• VDD = VDDQ = 1.2V (1.14–1.26V)
• 1.2V VDDQ-terminated I/O
• JEDEC-standard ball-out
– Standard
None
• Operating temperature
– Commercial (0°C ≤ TC ≤ 95°C)
• Revision
None
:A
:B
• Low-profile package
• TC of 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
1. CL = CAS (READ) latency.
Note:
Table 1: Key Timing Parameters
Data Rate
Speed Grade
-075E1
(MT/s)
2666
2400
2400
2133
2133
Target tRCD-tRP-CL
tRCD (ns)
13.5
tRP (ns)
13.5
CL (ns)
13.5
18-18-18
16-16-16
17-17-17
15-15-15
16-16-16
-083E2
13.32
14.16
14.06
15
13.32
14.16
14.06
15
13.32
14.16
14.06
15
-0832
-093E
-093
1. Backward compatible to 1600, CL = 11; 1866, CL = 13; 2133, CL = 15; and 2400, CL = 17.
2. Backward compatible to 2133, CL = 15 (-093E).
Notes:
PDF: 09005aef85fd40a1
DDR4_16Gb_x4_x8_2CS_TwinDie.pdf - Rev. D 12/16 EN
Micron Technology, Inc. reserves the right to change products or specifications without notice.
1
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Products and specifications discussed herein are subject to change by Micron without notice.