EBD25EC8AJFA

The EBD25EC8AJFA is 128M words * 72 bits, 1 rank 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 EBD25EC8AJFA are:(1)184-pin socket type dual in line memory module;(2)2.5V power supply;(3)data rate is 266Mbps(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)data inputs and outputs are synchronized with DQS;(8)4 internal banks for concurrent operation;(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)DQS is edge aligned with data for READs; center aligned with data for WRITEs;(12)commands entered on each positive CK edge; data referenced to both edges of 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 driver and 1 piece of serial EEPROM (2k bits) for presence detect (SPD) on PCB..

The absolute maximum ratings of the  EBD25EC8AJFA 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 .