آی سی حافظه W971GG6KB25I
آی سی حافظه W971GG6KB25I
GENERAL DESCRIPTION
The W971GG6KB is a 1G bits DDR2 SDRAM, organized as 8,388,608 words 8 banks 16 bits. This device achieves high speed transfer rates up to 1066Mb/sec/pin (DDR2-1066) for various applications.
W971GG6KB is sorted into the following grade parts: -18, -25, 25I and -3. The -18 grade parts is compliant to the DDR2-1066 (7-7-7) specification. The -25 and 25I grade parts 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 grade parts 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.
FEATURES
- Power Supply: VDD VDDQ = 1.8 V ± 0.1 V
- 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 andDQS ) 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
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