EBD51RC4AAFA

The EBD51RC4AAFA is 128M words * 72 bits, 1 ranks double data rate (DDR) SDRAM unbuffered module, mounting 18 pieces of 512M bits DDR SDRAM sealed in TSOP package. Read and write operations are performed at the cross points of the CK and the /CK.

Features of the EBD51RC4AAFA are:(1)184-pin socket type dual in line memory module;(2)2.5V power supply;(3)data rate is 333Mbps(max.);(4)2.5 V (SSTL_2 compatible) I/O;(5)double-data-rate architecture is two data transfers per clock cycle;(6)bi-directional, differential data strobe (DQS and /DQS) is transmitted/received with data, to be used in capturing data at the receiver;(7)DQS is edge aligned with data for READs is centeraligned with data for WRITEs;(8)differential clock inputs (CK and /CK);(9)DLL aligns DQ and DQS transitions with CK transitions;(10)commands entered on each positive CK edge: data and data mask referenced to both edges of DQS;(11)four internal banks for concurrent operation;(12)data inputs and outputs are synchronized with DQS;(13)auto precharge option for each burst access;(14)programmable burst length: 2, 4, 8;(15)programmable /CAS latency (CL): 2, 2.5;(16)refresh cycles: (8192 refresh cycles /64ms) is 7.8s maximum average periodic refresh interval;(17)2 variations of refresh;(18)1 piece of PLL clock driver, 2 pieces of register drivers and 1 piece of serial EEPROM (2k bits EEPROM) for Presence Detect (PD).

The absolute maximum ratings of the  EBD51RC4AAFA can be summarized as:(1):the parameter is voltage on any pin relative to VSS,the symbol is VT,the value is -1.0 to +3.6,the unit is V;(2):the parameter is supply voltage relative to VSS,the symbol is VDD,the value is -1.0 to +3.6,the unit is V;(3):the parameter is short circuit output current,the symbol is IOS,the value is 50,the unit is mA;(4):the parameter is power dissipation,the symbol is PD,the value is 18,the unit is W;(5):the parameter is operating case temperature,the symbol is Tc,the value is 0 to +70,the unit is ;(6):the parameter is storage temperature,the symbol is Tstg,the value is -55 to +125,the unit is .