HYS72V64220GR-8

The HYS72V64220GR-8 family are industry standard 168-pin 8-byte Dual in-line Memory Modules (DIMMs) which are organised as 8M x 72, 16M x 72, 32M x 72 & 64M x 72 high speed memory arrays designed with Synchronous DRAMs (SDRAMs) for ECC applications. All control and address signals are registered on-DIMM and the design incorporates a PLL circuit for the Clock inputs. The HYS72Vx201GR modules are registered only, without using a PLL on-DIMM circuit. The 512 MB module is available as one bank and two bank module. Use of an on-board register reduces capacitive loading on the input signals but are delayed by one cycle in arriving at the SDRAM devices. Decoupling capacitors are mounted on the PC board.

The DIMMs of the HYS72V64220GR-8 use a serial presence detects scheme implemented via a serial E²PROM using the two pin I²C protocol. The first 128 bytes are utilized by the DIMM manufacturer and the second 128 bytes are available to the end user.

All SIEMENS 168-pin DIMMs of the HYS72V64220GR-8 provide a high performance, flexible 8-byte interface in a 133,35 mm long footprint.