DESCRIPTION This document describes ValueRAM's 512M x 72-bit (4GB) DDR3-1333 CL9 SDRAM (Synchronous DRAM), 2Rx8, ECC, Intel® Compatibility Tested, memory module, based on eighteen 256M x 8-bit FBGA components. The SPD is programmed to JEDEC standard latency DDR3-1333 timing of 9-9-9 at 1.5V. This 240-pin DIMM uses gold contact fingers. The electrical and mechanical specifications are as follows: FEATURES • JEDEC standard 1.5V (1.425V ~1.575V) Power Supply • VDDQ = 1.5V (1.425V ~ 1.575V) • 667MHz fCK for 1333Mb/sec/pin • 8 independent internal bank • Programmable CAS Latency: 9, 8, 7, 6 • Programmable Additive Latency: 0, CL - 2, or CL - 1 clock • Programmable CAS Write Latency(CWL) = 7 (DDR3-1333) • 8-bit pre-fetch • Burst Length: 8 (Interleave without any limit, sequential with starting address “000” only), 4 with tCCD = 4 which does not allow seamless read or write [either on the fly using A12 or MRS] • Bi-directional Differential Data Strobe • Thermal Sensor Grade B • Internal(self) calibration : Internal self calibration through ZQ pin (RZQ : 240 ohm ± 1%) • On Die Termination using ODT pin • Average Refresh Period 7.8us at lower than TCASE 85°C, 3.9us at 85°C < TCASE < 95°C • Asynchronous Reset • PCB: Height 1.18” (30mm), double sided component
Product Specs
CL(IDD) 9 cycles
Row Cycle Time (tRCmin) 49.5ns (min.)
Refresh to Active/Refresh 160ns (min.)
Command Time (tRFCmin)
Row Active Time (tRASmin) 36ns (min.)
Maximum Operating Power 2.700 W*
UL Rating 94 V - 0
Operating Temperature 0o C to 85o C
Storage Temperature -55o C to +100o C
*Power will vary depending on the SDRAM used.
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