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M88MB3000 - DDR2 Advanced Memory Buffer (AMB)

The Advanced Memory Buffer (AMB) – M88MB3000 is a key device for use in the emerging FBDIMMs. Fully compliant with the latest JEDEC AMB specification, the M88MB3000 helps to provide high-capacity, high-performance memory for demanding applications such as servers and work stations.

The FBDIMMs connect to each other, as well as connect to the memory controller, using a high-speed, serial and point-to-point architecture. The M88MB3000 is the heart of this architecture. Located on each of the FBDIMMs, the M88MB3000 handles the FBDIMM channel and memory requests to and from the local DIMM, and forwards the requests to the next DIMM or the memory controller. This unique channel structure increases speed, capacity and reliability of the memory, thus eliminates the memory bottlenecks in applications require high-performance memory.

The memory interface of the M88MB3000 allows direct connection to DDR2-533, DDR2-667 or DDR2-800 commodity DRAM devices, and its FBDIMM channel interface enables bit rate at 3.2, 4.0 or 4.8 Gbps. With all these rich features available, the M88MB3000 works at an ultra-low power (< 3.5 W in active mode).


FeatureApplication

Fully compliant with JEDEC specifications

3.2, 4.0 or 4.8 Gbps FBD channel bit rate

533 MHz, 667 MHz and 800 MHz SDRAM support

Quad rank support

Dual DDR2 I/O voltage support (1.8 V / 1.55 V)

Support the following features/modes

All fail-over modes
Repeater mode
Recalibrate state
Voltage margin test

Support the following optional features

12-lane northbound non-ECC
L0s low power state
Data mask
Variable read latency
Timing margin test

Include the following Design for Test features

MemBIST engine for DIMM defects detecting
IBIST engine for interconnect testing at DIMM or system level
Transparent mode for DRAM testing

Fully support the FBD configuration register set

Green package: 655-pin FCBGA (Flip-Chip)

Power supply: 1.5 V, 1.8 V and 3.3 V

Ultra-low power consumption (< 3.5 W in active mode)

Servers

Workstations

Networking equipment

Storage systems

High-end desktop computers

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