MT61K256M32JE-12:A is a GDDR6 SGRAM from Micron, 2-channel 8 Gb (1 GB) — 256M×32 I/O (2×16-bit channels), 12 Gb/s per pin (3000 MHz WCK / 1500 MHz CK), 180-pin FBGA, 1.35 V, commercial temperature range (0–85 °C), revision A, for graphics cards / network chips / embedded graphics systems with PCIe 4.0/5.0, providing 64 GB/s (32×12 Gb/s) total bandwidth with 16 banks / 4 bank groups, 16-bit prefetch and compatibility with GDDR6 platforms.
1.Part number decoding
· MT61K: Micron GDDR6 SGRAM, 1.35 V (K = 1.35V)
· 256M32: 256 Meg × 32 I/O (8 Gb = 1 GB)
· JE: 180-pin FBGA (12.0×14.0 mm)
· -12: 12 Gb/s (3000 MHz WCK / 1500 MHz CK)
· :A: Revision A (commercial temperature range).
2.Architecture and performance
· Configuration: 256M×32 I/O (2×16-bit independent channels), 8 Gb (1 GB), 16 internal banks (4 bank groups), 16-bit prefetch (256-bit array access), burst length = 16.
· Speed: 12 Gb/s per pin, total bandwidth —
64 GB/s (32×12 Gb/s), WCK = 3000 MHz, CK = 1500 MHz.
· Latencies: programmable read/write latency, tCCD_L = 3/4 tCK, support for CABI, WCK2CK synchronization.
3.Electrical and operating parameters· Voltage: VDD = VDDQ = 1.35 V ±3% (POD135), VPP = 1.8 V ±3%/+6%.
· Temperature: 0–85 °C (commercial), RoHS compliant, (TSE) with auto-refresh management.
· Package: 180-pin FBGA (12.0×14.0 mm), 1.0 mm pitch.Applicability and compatibility
4.Applicability and compatibility· Application area: graphics cards (e.g., NVIDIA RTX 30/40, AMD Radeon RX 6000/7000), network chips (100G/400G), embedded graphics controllers (SoC with GPU).
· Features: 2 independent channels (x16/x8), ODT, driver auto-calibration, power saving modes (Self Refresh, Power Down), support for EDC/DBI.
