©Apacer Technology Inc.
2
General Description
Apacer 77.G1737.440 is 64M x 64 Double Data Rate SDRAM high density
memory modules based on first generation of 512Mb DDR SDRAM
respectively.
It consists of 8 pieces 64M x8 bit with 4banks Double Data Rate SDRAMs in
66pin TSOP-II (400mil) packages mounted on a 200pin glass-epoxy substrate.
Decoupling capacitors are mounted on the printed circuit board in parallel for
each DDR SDRAM. This product is Dual In-line Memory Modules and intended
for mounting into 200 pin edge connector sockets.
Synchronous design allows precise cycle control with the use of system clock.
Data I/O transactions are possible on both edges of DQS. Range of operating
frequencies, programmable latencies and burst lengths allow the same device
to be useful for a variety of high bandwidth, high performance memory system
applications.
Ordering Information
Part Number Bandwidth Speed Grade Max Frequency CAS Latency
77.G1737.440 3.2 GB/sec 400 Mbps 200 MHz CL3
Density Organization Component Rank
512MB 64M x 64 64M x8*8 1
Key Parameters
MT/s DDR-266 DDR-266 DDR-333 DDR-400
Grade -CL2 -CL2.5 -CL2.5 -CL3
Unit
tCK (min)
7.5 7.5 6 5
ns
CAS latency
2 2.5 2.5 3
tCK
tRC
9 9 10 11
tCK
tRAS
6 6 7 8
tCK
CL-tRCD-tRP
2-3-3 2.5-3-3 2.5-3-3 3-3-3
tCK