W9751G6KB Datasheet, PDF (4/87 Pages) Winbond – 8M  4 BANKS  16 BIT DDR2 SDRAM

W9751G6KB
1. GENERAL DESCRIPTION
The W9751G6KB is a 512M bits DDR2 SDRAM, organized as 8,388,608 words  4 banks  16 bits. This
device achieves high speed transfer rates up to 1066Mb/sec/pin (DDR2-1066) for general applications.
W9751G6KB is sorted into the following speed grades: -18, -25, 25I and -3. The -18 is compliant to the
DDR2-1066 (7-7-7) specification. The -25/25I are compliant to the DDR2-800 (5-5-5) or DDR2-800 (6-6-6)
specification (the 25I industrial grade which is guaranteed to support -40°C ≤ TCASE ≤ 95°C). The -3 is
compliant to the DDR2-667 (5-5-5) specification.
All of the control and address inputs are synchronized with a pair of externally supplied differential clocks.
Inputs are latched at the cross point of differential clocks (CLK rising and CLK falling). All I/Os are
synchronized with a single ended DQS or differential DQS- DQS pair in a source synchronous fashion.
2. FEATURES
 Power Supply: VDD, VDDQ = 1.8 V  0.1V
 Double Data Rate architecture: two data transfers per clock cycle
 CAS Latency: 3, 4, 5, 6 and 7
 Burst Length: 4 and 8
 Bi-directional, differential data strobes (DQS and DQS ) are transmitted / received with data
 Edge-aligned with Read data and center-aligned with Write data
 DLL aligns DQ and DQS transitions with clock
 Differential clock inputs (CLK and CLK )
 Data masks (DM) for write data
 Commands entered on each positive CLK edge, data and data mask are referenced to both edges of
DQS
 Posted CAS programmable additive latency supported to make command and data bus efficiency
 Read Latency = Additive Latency plus CAS Latency (RL = AL + CL)
 Off-Chip-Driver impedance adjustment (OCD) and On-Die-Termination (ODT) for better signal quality
 Auto-precharge operation for read and write bursts
 Auto Refresh and Self Refresh modes
 Precharged Power Down and Active Power Down
 Write Data Mask
 Write Latency = Read Latency - 1 (WL = RL - 1)
 Interface: SSTL_18
 Packaged in WBGA 84 Ball (8X12.5 mm²), using Lead free materials with RoHS compliant
Publication Release Date: Dec. 09, 2011
-4-
Revision A01