AD484M1644VTA-10I

Ascend Semiconductor Corporation 64Mb SDRAM ASCEND ASCEND Semiconductor Semiconductor 64M 64M SDRAM SDRAM Data Data sheet sheet Tel: (03)5635888 / Fax: (03)5635188/ http://www.ascendsemi.com.tw Preliminary 1 Ascend Semiconductor Corporation Ordering Information 64Mb SDRAM AD 48 4M 16 4 4 V T A – 7 L I Ascend Semiconductor Operating Range I : Industrial -40¢J ~ 85¢J Non : Commercial 0¢J ~ 70¢J S : Special 0¢J ~ 85¢J EDO FPM DDRSDRAM DDRSGRAM SGRAM SDRAM : : : : : : 40 41 42 43 46 48 Density 16M : 16 Mega Bits 8M : 8 Mega Bits 4M : 4 Mega Bits 2M : 2 Mega Bits 1M : 1 Mega Bit Organization 8 : x8 9 : x9 16 : x16 18 : x18 32 : x32 Refresh 1 : 1K, 8 : 8K 2 : 2K, 6 :16K 4 : 4K Bank 2 : 2Bank 6 : 16Bank 4 : 4Bank 3 : 32Bank 8 : 8Bank Power Non : Standard L : Low power Min Cycle Time ( Max Freq.) -55 : 5.5ns ( 183MHz ) -6 : 6ns ( 167MHz ) -7 : 7ns ( 143MHz ) -8 : 8ns ( 125MHz ) -10 : 10ns ( 100MHz ) -15 : 15ns (66MHz,CL1 applicable) Revision A : 1st B : 2nd C : 3rd D :4th Interface V: 3.3V R: 2.5V Package C: CSP B: uBGA T: TSOP Q: TQFP P: PQFP ( QFP ) Preliminary 2 Ascend Semiconductor Corporation 64Mb( 4Banks ) Synchronous DRAM AD484M1644VTA ( 4Mx16 ) Description 64Mb SDRAM The AD484M1644VTA is Synchronous Dynamic Random Access Memory ( SDRAM ) organized as 1,048,756 words x 4 banks x 16 bits. All inputs and outputs are synchronized with the positive edge of the clock . The 64Mb SDRAM uses synchronized pipelined architecture to achieve high speed data transfer r...