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The JM388Q643A-8 is a 64M x 64bits DDR2-800 Unbuffered DIMM. The JM388Q643A-8 consists of 8 pcs 64Mx8bits DDR2 SDRAMs in 60 ball FBGA packages and a 2048 bits serial EEPROM on a 240-pin printed circuit board. The JM388Q643A-8 is a Dual In-Line Memory Module and is intended for mounting into 240-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 operation frequencies, programmable latencies allow the same device to be useful for a variety of high bandwidth, high performance memory system applications.

Features

• RoHS compliant products.
• JEDEC standard 1.8V ± 0.1V Power supply
• VDDQ=1.8V ± 0.1V
• Posted CAS
• Programmable CAS Latency: 3,4,5
• Programmable Additive Latency :0, 1,2,3 and 4
• Write Latency (WL) = Read Latency (RL)-1
• Burst Length: 4,8(Interleave/nibble sequential)
• Programmable sequential / Interleave Burst Mode
• Bi-directional Differential Data-Strobe (Single-ended data-strobe is an optional feature)
• Off-Chip Driver (OCD) Impedance Adjustment
• MRS cycle with address key programs.
• On Die Termination
• Refresh and Self Refresh
• Serial presence detect with EEPROM