W942516AH

www.DataSheet4U.com PRELIMINARY W942516AH 4M × 4 BANKS × 16 BIT DDR SDRAM GENERAL DESCRIPTION W942516AH is a CMOS Double Data Rate synchronous dynamic random access memory (DDR SDRAM), organized as 4,194,304 words × 4 banks × 16 bits. Using pipelined architecture and 0.175 µm process technology, W942516AH delivers a data bandwidth of up to 286M words per second (-7). To fully comply with the personal computer industrial standard, W942516AH is sorted into three speed grades: -7, -75 and -8. The -7 is compliant to the 143 MHz/CL2.5 or DDR266/CL2 specification, the 75 is compliant to the DDR266/CL2.5 specification, the -8 is compliant to the DDR200/CL2 specification All Inputs reference to the positive edge of CLK (except for DQ, DM, and CKE). The timing reference point for the differential clock is when the CLK and CLK signals cross during a transition. And Write and Read data are synschronized with the both edges of DQS (Data Strobe). By having a programmable Mode Register, the system can change burst length, latency cycle, interleave or sequential burst to maximize its performance. W942516AH is ideal for main memory in high performance applications. FEATURES 2.5V ± 0.2V Power Supply Up to 143 MHz Clock Frequency Double Data Rate architecture; two data transfers per clock cycle Differential clock inputs (CLK and CLK ) DQS is edge-aligned with data for Read; center-aligned with data for Write CAS Latency: 2 and 2.5 Burst Length: 2, 4, and 8 Auto Refresh and Se...