[Qimonda AG]

Description
The HYS72D[64/128/256]xxx[G/H]BR–[5/6/7]–B are low profile versions of the standard Registered DIMM modules with 1.1” inch (28.58) and 1.2” inch (30,40 mm) height for 1U Server Applications. The Low Profile DIMM versions are available as 64M × 72(512 MB), 128M × 72 (1 GB) and 256M × 72 (2 GB).
The memory array is designed with Double Data Rate Synchronous DRAMs for ECC applications. All control and address signals are re-driven on the DIMM using register devices and a PLL for the clock distribution. This reduces capacitive loading to the system bus, but adds one cycle to the SDRAM timing. A variety of de coupling capacitors are mounted on the PC board. The DIMMs feature serial presence detect based on a serial E2PROM device using the 2-pin I2C protocol. The first 128 bytes are programmed with configuration data and the second 128 bytes are available to the customer.

FEATUREs
• 184-Pin Registered 8-Byte Dual-In-Line DDR SDRAM Module for “1U” PC, Workstation and Server main memory applications
• One rank 128M × 72 and 64M × 72 organization, and two ranks 256M × 72 organization
• Standard Double-Data-Rate Synchronous DRAMs (DDR SDRAM) with a single + 2.5 V (± 0.2 V) power supply and +2.6 V (± 0.1 V) power supply for DDR400
• Built with DDR SDRAMs in P-TFBGA-60 package
• Programmable CAS Latency, Burst Length, and Wrap Sequence (Sequential & Interleave)
• Auto Refresh (CBR) and Self Refresh
• All inputs and outputs SSTL_2 compatible
• RAS-lockout supported tRAP=tRCD
• Re-drive for all input signals using register and PLL devices.
• Serial Presence Detect with E2PROM
• Low Profile Modules form factor: 133.35 mm × 28.58 mm (1.1”) × 4.00 mm and 133.35 mm × 30.48 mm (1.2”) × 4.00 mm
• Standard reference card layout Raw Card “A”, “B”, “C“, “D“.
• Gold plated contacts