NT512T64UH4D0FY / NT1GT64U88D0BY / NT2GT64U8HD0BY
512MB: 64M x 64 / 1GB: 128M x 64 / 2GB: 256M x 64
Unbuffered DDR2 SDRAM DIMM
REV 1.0 1
© NANYA TECHNOLOGY CORP.
NANYA TECHNOLOGY CORP. reserves the right to change Products and Specifications without notice.
240pin Unbuffered DDR2 SDRAM MODULE
Based on 64Mx16 DDR2 SDRAM D-die (512MB)
Based on 128Mx8 DDR2 SDRAM D-die (1GB/2GB)
Features
Performance:
• JEDEC Standard 240-pin Dual In-Line Memory Module
• 64Mx64 DDR2 Unbuffered DIMM based on Nanya 64Mx16
DDR2 SDRAM D-die component – (512MB)
• 128Mx64 and 256Mx64 DDR2 Unbuffered DIMM based on
Nanya 128Mx8 DDR2 SDRAM D-die component – (1GB/2GB)
• Double Data Rate architecture; two data transfer per clock cycle
• Differential bi-directional data strobe (DQS & )
• DQS is edge-aligned with data for reads and is center-aligned
with data for writes
• Differential clock inputs (CK & )
• Intended for 333MHz/400MHz applications
• Inputs and outputs are SSTL-18 compatible
• VDD = VDDQ = 1.8V ± 0.1V
• 7.8 μs Max. Average Periodic Refresh Interval
• Programmable Operation:
- Device Latency: 3, 4, 5 (-3C/-AC); 4, 5, 6 (-AD)
- Burst Length: 4, 8
• Auto Refresh (CBR) and Self Refresh Modes
• Automatic and controlled precharge commands
• 13/10/1 Addressing (row/column/rank) – 512MB
• 14/10/1 Addressing (row/column/rank) – 1GB
• 14/10/2 Addressing (row/column/rank) – 2GB
• Serial Presence Detect
• On Die Termination (ODT)
• OCD impedance adjustment
• Gold contacts
• SDRAMs in 84-ball BGA Package – 512MB
• SDRAMs in 60-ball BGA Package – 1GB/2GB
• RoHs Compliance
Description
NT512T64UH4D0FY, NT1GT64U88D0BY and NT2GT64U8HD0BY are 240-Pin Double Data Rate 2 (DDR2) Synchronous DRAM
Unbuffered Dual In-Line Memory Module (UDIMM), organized as one rank 64Mx64 (512MB), one rank 128Mx64 (1GB) and two ranks
256Mx64 (2GB) high-speed memory array. NT512T64UH4D0FY use four 64Mx16 DDR2 SDRAMs, NT1GT64U88D0BY use eight
128Mx8 DDR2 SDRAMs and NT2GT64U8HD0BY use sixteen 128Mx8 DDR2 SDRAMs in BGA packages. These DIMMs are
manufactured using raw cards developed for broad industry use as reference designs. The use of these common design files minimizes
electrical variation between suppliers. All NANYA DDR2 SDRAM DIMMs provide a high-performance, flexible 8-byte interface in a 5.25”
long space-saving footprint.
The DIMM is intended for use in applications operating up to 333MHz (or 400MHz) clock speeds and achieves high-speed data transfer
rates of up to 667Mbps (or 800Mbps). Prior to any access operation, the device latency and burst / length /operation type must be
programmed into the DIMM by address inputs A0-A12 (512MB) / A0-A13 (1GB/2GB) and I/O inputs BA0, BA1 and BA2 using the mode
register set cycle.
The DIMM uses serial presence-detect implemented via a serial 2,048-bit EEPROM using a standard IIC protocol. The first 128 bytes of
serial PD data are programmed and locked during module assembly. The remaining 128 bytes are available for use by the customer.