DDR2 Unbuffered DIMM DDR2 Unbuffered DIMM is high-speed, low power memory module that use DDR2 SDRAM in FBGA package and a 2048 bits serial EEPROM on a 240-pin printed circuit board. DDR2 Unbuffered DIMM 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 Pin Identification RoHS compliant products. JEDEC standard 1.8V 0.1V Power supply VDDQ=1.8V 0.1V Clock Freq: 200MHZ for 400Mb/s/Pin 266MHZ for 533Mb/s/Pin. 333MHZ for 667Mb/s/Pin. 400MHZ for 800Mb/s/Pin. Programmable CAS Latency: 3,4,5,6 Programmable Additive Latency : :0, 1, 2, 3, 4, 5 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 Serial presence detect with EEPROM Symbol Function A0~A13, BA0~BA2 Address/Bank input DQ0~DQ63 Bi-direction data bus. DQS0~DQS7 Data strobes /DQS0~/DQS7 CK0, /CK0,CK1, /CK1 CK2, /CK2 CKE0, CKE1 Differential Data strobes Clock Input. (Differential pair) ODT0, ODT1 On-die termination control line /S0, /S1 DIMM rank select lines. /RAS Row address strobe /CAS Column address strobe /WE Write Enable DM0~DM7 Data masks/high data strobes VDD Clock Enable Input. VREF +1.8 Voltage power supply +1.8 Voltage Power Supply for DQS Power Supply for Reference VDDSPD SPD EEPROM power supply SA0~SA2 Address select for EEPROM SCL Clock for EEPROM SDA Data for EEPROM VSS Ground NC No Connection VDDQ Dimensions (Normal Profile, Unit: millimeter) Note: 1. Tolerances on all dimensions +/-0.15mm unless otherwise specified. Dimensions (Very Low Profile, Unit: millimeter) Note: 1. Tolerances on all dimensions +/-0.15mm unless otherwise specified. Pin Assignments